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Fluke 8922A User's Manual

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1. 4 24 AC Low Level Check 4 26 High Frequency Response Check 4 28 CALIBRATION ADJUSTMENTS 4 32 Power Supply Calibration Adjustment 4 34 Low Midband Accuracy Adjustment 4 36 ineat Analog Output 22 56 82 42 uu sus 4 38 AC Low Level Calibration and Filter Check 4 40 High Frequency Calibration 4 42 RMS Protection Circuit Calibration 4 44 TROUBLESHOOTING 2452494 pana 4 48 RMS Sensor ReplacemeHt debeo 4 50 A D Calibration Resistor Selection 4 52 DC Offset Resistor Selection Re res LISTS OF REPLACEABLE PARTS TABLE OF CONTENTS 5 1 INTRODUCTION eus 5 4 HOW IO OBIAIN PARIS 25525555 teretes OPTION AND ACCESSORY INFORMATION TABLE OF CONTENTS GENERAL INFORMATION MANUAL CHANGE INFORMATION SCHEMATIC DIAGRAMS TABLE OFCONTENTS oe tace ses PAGE 4 1 4 1 4 1 4 1 4 1 4 1 4 3 4 3 4 3 4 3 4 5 4 5 4 5 4 5 4 7 4 10 4 10 4 11 4 12 4 13 4 14 4 14 4 18 4 19 4 19 5 1 5 2 5 2 7 1 1 8 1
2. 8922 ISV 15 N 401 7 as EDT C408 g RAZ C409 01 2 KEY 401 4 lt 6 5V i 7 GND 4 22 1 1 gt Le 892XA 1613 892XA 1013 R40 E401 w4ce NOTES UNLESS OTHERWISE SPECIFIED I ALL RESISTOR NALUES ARE OAMS 2 ALL CAPACITANCE VALUES ARE IN MICROFARADS 5 405 48 VALLES AEE SELECTED AND ARE OSUALLY OPEN NOT INSTALLED Figure 8 4 003 Counter Output Option Assembly CIS 8920A 1614 8922A V 5 2227 2 RSIS GREEN ES 507 250 V4 fo IM 31 56 2502 u So 0501 1 ix R509 TPSOS 2208 22180 8 gt VIOLET R503 50 R520 IM IK 209 T Oe 9 W5 ON REAR PANEL 15V 1 11 a OND E504 2i 2 2 YELLOW R504 INA 1 KEY 454 R505 T L CR502 adu USOT TUON 2503 10 0 re 25 0501 17 gt ORANGE ASTI 5505 RSLS 507 eres 9 R523 gt 32514 C 500 00 0 14 15V gt 16 RSO are USO 8577 ISV 100 Tow 8 501 05 oy BLUE at 294 E V PRONE 601 8920A 1014 Op LAST NO USED E506 RSLS 0501 ae 75 LOGIC ON NOTES
3. This manual documents the Model 8922A True RMS Voltmeter and its assemblies at the revision levels shown in Appendix 7A Table 7A 1 If your instrument contains assemblies with different revision letters it will be necessary to either update or backdate this manual Refer to the supplemental change errata sheet for newer assemblies or to the backdating sheet Appendix 7A for older assemblies For the benefit and convenience of its customers Fluke Corporation Fluke has reproduced this copy of a manual which is no longer in production This manual has not been edited or updated since the revision date shown on the lower left hand corner of the first page Fluke will not be liable for any claims losses or damages of any kind incurred by any user arising from use of this manual 8922A True Voltmeter Instruction Manual FLUKE June 1979 1981 John Fluke Mfg Co Inc all rights reserved Litho in U S A LIMITED WARRANTY amp LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service The warranty period is one year and begins on the date of shipment Parts product repairs and services are warranted for 90 days This warranty extends only to the original buyer or end user customer of a Fluke authorized reseller and does not apply to fuses disposable batteries or to any product which in Fluke s opinion has been misused altered neg
4. 14 2 40 Below 10 Hz crest factor is limited by the time required for the internal rms sensor protection circuit to energize and limit the sensor temperture Typical low frequency crest factor limitation is shown in Figure 2 4 When the protection circuit does not energize the UNCAL annunciator will light indicating that the pro tection circuit is introducing measurement errors When this occurs manually selecting a higher range may produce a better measurement 2 41 INPUT COUPLING AC DC 2 42 The 8922A is equipped witha FUNCTION switch which allows you to select either AC or AC DC coupling When the switch is out AC coupling is selected In this function the dc component is removed from the input signal and is not measured or displayed Depressing the FUNCTION switch selects AC DC coupling This function allows the 8922A to measure and display the true rms value for the total input signal ac components and dc components You should always consider the dc component when power dissipation is being determined This function also increases the damping which is 15 1 2 SCALE 3 4 SCALE FULL SCALE 10 PERMISSABLE CREST FACTOR 5 10 FREQUENCY Hz Figure 2 4 Typical 8922A Crest Factor Limitation 2 6 required for good performance below 10 Hz This additional damping may also aid in the measurement of higher frequency signals when the level of the signal fluctuates
5. 3 10 4 Low and Midband Performance Test Set Up 4 3 4 2 DC Low Level Check lt 25 4 6 4 3 AC Low Level ines 4 6 4 4 High Frequency Response Check 4 7 4 5 Calibration and Test Point Locations 4 8 4 6 Linear Analog Output Deck o y ass Sheu 4 12 47 High Frequency Calibration e prs 4 14 4 8 A D Waveforms General Conditions 4 17 1 1 INTRODUCTION 1 2 The Model 8922A is a Digital True RMS Voltmeter capable of accurately measuring the true rms value of nonsinusoidal signals containing AC or AC DC components The instrument has a frequency range of 10 Hz to 11 MHz with a full scale crest factor of seven and is capable of displaying measurements in either volts or dB units 1 3 Selecting the VOLTS position on the dB VOLTs switch enables the volts display mode and two applicable front panel annunciators V mV In this mode the instrument displays up to 3 digit figure to indicate the true rms value of any AC or AC DC input signal whose amplitude is between 180 uV and 700V rms 1000V peak 1 4 The dB display mode logarithmic is enabled when dB is selected on the front panel dB VOLTS display switch In this mode the instrument displays up to a 4 d
6. 10 UF 20 20V CER 10 000 20 100V CAP TA 1 0 UF 20 35A CER 10 000 202 100V 10 UF 20 20V 10 UF 20 20V CER 10 000 20 100V CAP CER 68 2 100V 10 UF 20 20V 10 UF 20 20V CER 0 22 UF 20 50V CAP VAR 1 5 0 25 PF 2000V 10 UF 20 20V CER 50 000 20 80 25V CER 10 000 202 100V CER 33 PF 2 100V 10 UF 20 20V 10 UF 20 20V CER 10 000 20 100V CAP 10 UF 20 20V CAP TA 10 UF 20 20V TA 82 UF 20 20V CAP 82 UF 20 20V CAP CER 1000 PF 10 500V CAP CER 10 000 20 100V CAP CER 10 000 20 100V CAPACITOR SET C53 C55 CAP CER 1000 PF 10 500V CAPACITOR SET SEE C53 CAP TA 10 UF 20 20V CAP MYLAR 0 027 UF 10 250V CER 50 000 20 80 25V 50 000 20 802 25V CER 0 0068 UF 5 100V FLUKE STOCK NO ORDER 479519 474551 479253 460832 218206 460824 460840 460170 460147 119455 218206 362772 148924 330662 149153 161919 149153 330662 330662 149153 362756 330662 330662 190314 218206 330662 148924 149153 354852 330662 330662 149153 330662 330662 351392 357392 357806 149153 149153 463208 357806 330662
7. Symbex Corp Painesville OH 30148 AB Enterprise Inc Ahoskie NC 30161 Aavid Engineering Inc Laconia NH 30315 Itron Corp San Diego CA 30323 IL Tool Works Inc Chicago IL 30800 General Instrument Cerp Capacitor Div Hicksville NY 30838 Fastec Chicago ILL 31019 Solid State Scientific Inc Willow Grove PA 31091 Alpha Industries Inc Microelectronics Div Hatfield PA 31323 Metro Supply Company Sacramento CA 7 6 Federal Supply Codes for 31433 Kemet Electonics Corp Simpsonville NC 31448 Amny Safeguard Logistics Command Huntsville AL 31471 Gould Inc Semiconductor Div Santa Clara CA 31522 Metal Masters Inc Baldwin MS 31746 Cannon Electric Woodbury TN 31827 Budwig Ramona CA 31918 ITT Schadow Eden Prairie MN 32293 Intersil Cupertino CA 32539 Mura Corp Westbury Long Island N Y 32559 Bivar Santa Ana CA 32719 Siltronics Santa Ana CA 32767 Griffith Plastics Corp Burlingame CA 32879 Advanced Mechanical Components Northridge CA 32897 Murata Erie North America Inc Carlisle Operations Carlisle Pennsylvania 32997 Bourns Inc Div Riverside CA 33025 ComOmni Spectra Inc Replacing Omni Spectra Microwave Subsystems Div Tempe AZ 33096 CO Crystal Corp Loveland CO 33173 General Electric Co Owensboro KY Manufacturers cont 33246 Epoxy Technology Inc Billerica MA 33292
8. 1 Measure 1V 2 Press dB then rel buttons 3 1V becomes 0 dB reference Figure 2 5 Typical Relative dB Measurements 3 Depress the dB VOLTS switch in 4 Depress the REL dBm switch in This establishes the voltage V as the 0 dB reference level Therefore subsequent dB measurements will be equivalent to dBm measurements as long as the system impedance R is maintained NOTE This reference will hold as long as the REL dBm switch is at the in position and the instrument is energized 2 68 Linear Analog Output 2 69 A pair of banana jacks on the rear panel of the 8922A provides access to a linear dc analog output signal This signal is proportional to the applied input signal and is linearly scaled a 2V dc output is equal to 2000 counts on the display Output accuracy is 1 relative to the front panel reading The output signal is buffered and is suitable for driving an external analog meter recorder plotter scope etc 2 70 OPERATION 2 71 With reference to the preceding paragraphs use the following procedure to turn on and operate the 2 8 Model 8922 refer to Section 6 for option and accessory information 1 Connect the 8922A to line power 2 Set the front panel POWER switch to ON in The front panel display should light 3 Select the appropriate input leads and connect them to the meter s input terminals Add terminations as close as possible to the input connector if impedance match
9. 3 31 To make a voltage measurement the controller must linearly count clock pulses for a time determined by the A D converter Referring to Figure 3 7 you can see that when the dB VOLTS switch 16 placed in its up out position the rate multiplier will be shunted and the main counter will count the number of clock pulses exactly as they occur linear As soon as the integrator in the A D converter reaches the auto zero point CM will go high commanding the main counter to stop counting and start shifting its count to the data latches count of clock pulses in BCD format that is proportional to the true rms value of the signal being measured The BCD data is then shifted out of the controller to a seven segment decoder on four lines W X Y and Z 3 5 8922 INTEGRATOR COMPARATOR 1 0V DC FULL SCALE RMS O CONVERTER UT Nu N 0 INT INT DE AZ CM CONTROLLER READ PERIOD dB 7 22 49 VOLTAGE ON C203 pd RANGE INT 100 mSEC CLOCK 1 1 L1 111 111111 11 111111111111 MN 1 WIWWWWWW 200 mSEC MAX 0 180 1999 For AC DC damping Function times increase by 2 5 Figure 3 5 A D Converter Simplified Schematic and Timing 3 6 8922 100 ms 200 EXTENDED INTEGRATE OVERLOAD OL AUTO ZERO AZ OL ONLY NOTE If AC DC damping is selected all times increase by 2 5 200 us DE A
10. 8922 List of Tables TABLE TITLE PAGE 1 1 5922 55 Ded e 1 1 1 2 SPeCiHICAlIONS Zur lumu qas dake esas 1 2 1 3 Specifications for S922A Options 1 6 2 Controls Indicators and Connectors 22222222274 xe qd eu 2 3 3 1 Signal Conditioner Gain Configuration 3 4 3 2 Controller Summary re uyapis RE MIN SE AE x E 3 7 3 3 Output Range Codes sinis ep 3 9 3 4 Over Under Conditions 2 Sa ders 3 9 3 5 Input wie woes eae 3 9 4 1 Recommended Test 30s 00sec EE PURI E GRE 4 2 4 2 Power Selection ieee recede 4 2 4 3 Low and Midband Performance Checks Volts Display Mode 4 4 4 4 dB Display obe Senay 4 5 4 5 DE Low Level L heck erie steams tees Shea etna heals tae ee 4 6 4 6 Hish Frequency Response C heck E EMEN EE 4 7 4 7 Low and Midband Accuracy Adjustments ow 4 10 4 8 High at 4
11. Pioneer Sterilized Wiping Cloth Co Portland OR 33297 NEC Electronics USA Inc Electronic Arrays Inc Div Mountain View CA 33919 Nortek Inc Cranston RI 34114 Oak Industries Rancho Bemardo CA 34263 CTS Electronics Corp Brownsville TX 34333 Silicon General Inc Garden Grove CA 34335 Advanced Micro Devices AMD Sunnyvale CA 34359 MN Mining amp Mfg Co Commercial Office Supply Div Saint Paul MN 34371 Harris Corp Harris Semiconductor Products Group Melbourne FL 34576 Rockwell International Corp Newport Beach CA 34641 Instrument Specialties Euless TX 34649 Intel Corp Santa Clara CA 34802 Electromotive Inc Kenilworth NJ 34848 Hartwell Special Products Placentia CA 35009 Renfrew Electric Co Ltd IRC Div Toronto Ontario Canada 35986 Amrad Melrose Park IL 36665 Mitel Corp Kanata Ontario Canada 36701 Van Waters amp Rogers Valley Field Quebec Canada 37942 Mallory Capacitor Corp Sub of Emhart Industries INpolis IN 39003 Maxim Industries Middleboro MA 4F434 Plastic Sales Los Angeles CA 40402 Roderstein Electronics Inc Statesville NC 42498 National Radio Melrose MA 43543 Nytronics Inc Now 53342 43744 Panasonic Industrial Co San Antonio TX 43791 Datron Systems Wilkes Barre PA 44655 Ohmite Mfg Skokie IL 47001 Lumberg Inc Richmond VA 47379 ISOCOM Campbell CA 49569 IDT I
12. 01121 91637 91637 00779 00779 00779 00779 02735 02735 895 36 MFG PART NO OR TYPE OPTION CO016B102G 102K 20 101 230818105 196D226X00154A1 150D225X9020A 150D225X9020A 144448 144448 144448 108 0903 001 108 0902 001 456772 486688 811 00 17 376475 369520 CB1055 CB1055 1055 551002 1565 1035 553752 CMF557502B CMF551503C CMF551003B 335760 CMF551503C CB4735 CMF551583F 477018 CB1055 CMF552002B CMF65 1504F CB1025 1055 1055 CB1055 CMF551003F CMF551433F 1 87022 0 1 87022 0 1 87022 0 1 87022 0 CD4O49UBE CA324E 488163 REC QTY AR REF REF REF 8922 m oz 604 5 8922 BR OW Y 501 562 2 IHj 21502 y gt 0501 M TO J503 TP uD 0501 501 R501 3 2054 054 LOSY 8920A 1614 Figure 604 4 Logarithmic Analog Output Option PCB Assembly 604 6 6521 1 INTRODUCTION 6521 2 The DMM Digital Interface provides optically isolated DMM data to a compatible external unit such as the DMM 1120A Interface PCB Note The DMM Digital Interface connected to the DMM 1120A Interface PCB mounted an 11204 Translator is the 529 Option Compatability requirements for the external unit are presented below All additional information such as theory of operation installation operation etc is presented in supple
13. 219022 219022 474445 512236 223529 289553 148023 458299 261669 268813 309674 235002 234708 261669 246223 246223 235226 218032 291617 168229 215685 220061 182204 182204 194944 148189 148189 219199 358077 193342 182204 433839 357830 418566 418566 MFG SPLY CODE 01121 01121 91637 01121 01121 01121 01121 01121 01121 01121 91637 91637 91637 91637 01121 89536 91637 91637 89536 91637 91637 91637 91637 91637 91637 01121 91637 91637 01121 01121 01121 01121 01121 01121 01121 11236 01121 01121 01121 89536 12040 18324 18324 MFG PART NO OR TYPE CB1015 CB8215 CMF556190F CB2235 CB3305 CB1615 CB3015 CB3015 CB1805 CB1805 CMF551001F CMF5549R9B CMF557501F CMF555112F CB1025 458299 CMF552052F CMF554993F 309674 CMF553573F CMF551103 CMF552052F CMF558252F CMF558252F CMF552001F CB5115 CMF551432F CMF551001F CB1545 CB2745 CB1055 CB1055 CB1065 CB1045 1045 3601 1544 CB5655 CB5125 CB1055 433839 LHOO42C LM358 CR3999 LM358 CR3999 TOT REC QTY REF REF REF REF REF REF REF REF REF REF N 0 T E 05 VR1 VR2 VR3 VR4 XR18 XR35 XR65 XR79 Table 5 4 A2 AC PCB Assembly cont FLUKE DESCRIPTION STOCK NO IC LINEAR 5 XSTR ARRAY 248906 DIODE ZENER 5 6V 277236 DIODE ZENER 5 6V 277236 PART OF ZENER RESISTOR SET SEE R28 DIODE ZENER 13V 110726 SOCKET IN
14. 22022 1355 8002 A NP 19047 511 061800 00 111328 110635 108 0903 001 108 0902 001 31 010 55 109 1 04 55 109 1 04 55 109 1 08 2 4 REF REF REF REF 1 2 gt REF REF J107 J301 J401 J501 J601 L200 L201 MP 1 MP203 MP204 MP205 MP206 MP207 MP208 MP209 MP210 MP228 231 232 236 237 238 239 MP240 MP241 242 MP243 Q200 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q210 Q211 Q212 Q213 Q214 R200 R201 R202 R203 R204 R205 R206 R207 R209 SOCKET SNGL IN LINE Table 5 2 A1 Main PCB Assembly cont DESCRIPTION CONNECTOR MATING POST CONTACT POST CONTACT POST CONTACT CHOKE 6 TURN CHOKE RF METER ANALOG PANEL BRACKET SWITCH MOUNTING BRACKET METER MOUNTING BRACKET PUSH ROD KNOB SKIRTED SHIELD TRANSFORMER BRACKET FRONT PANEL PANEL REAR PUSH ROD POWER SWITCH COVER AC SWITCH GUARD BASE DECAL KNOB PANEL FRONT HOLE PLUG BUTTON RANGE BUTTON RANGE BUTTON FUNCTION BUTTON FUNCTION BUTTON FUNCTION BUTTON FUNCTION SPACER XSTR XSTR SI PNP XSIR SI PNP XSTR SI PNP XSTR SI PNP XSTR SI PNP XSTR SI NPN XSTR SI NPN XSTR SI PNP PWR XSTR FET N CHANNEL XSTR FET N CHANNEL XSTR FET N CHANNE
15. 267120 148924 148924 512244 MFG SPLY CODE ONLY 13845 95275 95275 95275 12982 95275 95275 72982 91293 56289 72982 80031 72892 56289 56289 56289 56289 56289 56289 56289 80031 56289 56289 51642 72982 56289 72892 56289 80031 56289 56289 56289 56289 56289 56289 56289 56289 56289 56289 89536 56289 56289 13445 12892 12892 95275 MFG PART NO OR TYPE REPLACEABLE PARTS C280MAG A22K VY15CA181JA VK20BA511J 530 000 VK20BA390J VK20BA512J 538 002 9300 CO23B101F103M 530 000 2222 638 09478 5855 000 Y5UD 503Z 196D106X0020KA1 C023B101F 103M 196D105X0035JA1 C023B101F 103M 196D106X0020KA1 196D106X0020KA1 C023B101F 103M 2222 63 1 10689 196 106 0020 1 196 106 0020 1 200 050 601 502 530 000 1960106 0020 1 5855 000 Y5UD 503Z CO23B101F103M 2222 638 10399 196D106X0020KA1 196D106X0020KA1 C023B101F 103M 196D106X0020KA1 196D106X0020KA1 196D826X0020TEH 1960826 0020 CO16B102G 102K 023 101 103 CO23B101F 103M 463208 CO16B1026G 102K 196D106X0020KA1 C280MAE A47K 5855 000 500 5032 5855 000 508 5032 6825 QTY 0 REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF REF gt 8922 Table 5 4 2 AC PCB Assembly cont FLUKE MFG N DESCRIPTION STOCK SPLY MES FEART NOS Or NO COD
16. 470 5 1 4W 147983 01121 CB4715 1 R414 RES COMP 5 1K 5 1 4W 193342 01121 085125 1 R415 RES COMP 1K 5 1 4W 118023 01121 1025 1 R416 RES COMP 680 52 1 4W 148007 01121 6815 R417 RES COMP 51 5 1 4W 221879 01121 CB5105 REF T401 TRANSFORMER 461863 89536 461864 1 T402 TRANSFORMER 472798 89536 472498 1 U401 IC LIN HI SPEED ANALOG VOL COMPARATOR 386920 12040 LM361N 2 1 0402 LIN HI SPEED ANALOG VOL COMPARATOR 386920 12040 361 gt Refer to Figure 603 1 892XA 1613 Figure 603 6 Counter Output Option PCB Assembly 603 10 604 1 INTRODUCTION 604 2 The Logarithmic Analog Output Option provides a non isolated output voltage which varies continuously as the logarithm of the rms input Scaling is OV dc output corresponds to 0 dB which is 200 uV rms input to the 8922A while 13 1V dc output 131 dB 700V rms input A continuous frequency response of circuits with a wide dynamic output is easily plotted on an XY recorder using this option The option s output is non isolated 604 3 SPECIFICATIONS 604 4 Specifications for the Logarithmic Analog Output Option are given in Section 1 of this manual 604 5 INSTALLATION 604 6 Install the option as follows referring to Figure 604 1 Remove the top cover see Access Procedures 2 Remove the plate located at the top of the 8922A s rear panel 3 Install the banana jack plate with the red banana jack to th
17. AC DC ACCURACY USE 50 Hz 10 kHz SPEC FOR DC ONLY ADD TO AC SPECIFICATION 10 Digits or 0 5 dB Above 2 mV 100 Digits 5 dB Below 2 mV When AC DC Damping is Selected and Input is AC Only Below 2 mV add mV Input digits mv Input 2 dB 1 3 8922 Table 1 2 Specifications cont TEMPERATURE COEFFICIENTS at 0 C to 18 C 28 C to 50 C 32 to 64 4 F 82 4 to 122 FUNCTION AC 0 07 or 0 006 0 1 C or 0 01 INPUT ABOVE 2 mV BELOW 2 mV AC DC 2 digits C or 0 1 48 20 digits C or 1 0 dB C DC 2 digits 2 digits Same as AC Function FC or PC mV input mV input LOW PASS FILTER RESPONSE Typical 10 or 1 dB gt 20 2 3 a lt 30 3 1 10 100 200 FREQUENCY kHz GENERAL INPUT Isolated BNC input floating up to 6V peak DISPLAYS 5 0 3 high digit 7 segment LED s with automatic decimal point location and mV V dB RELATIVE REFERENCE and UNCAL annunciators The display also incorporates an uncalibrated analog meter for nulling and peaking AUTORANGING RATE VOLTS AC 700 ms max range change 2 2 sec max for 6 range changes AC DC 2 5 sec ac max range change 10 sec max for 6 range changes dB AC 950 ms max range change 2 9 sec max for 6 range changes AC DC 3 5 sec max range change 13 sec max for 6 range cha
18. Adjust R44 so that the display of the UUT reads the same error as noted in step l e 1 digit e Depress the RANGE HOLD switch readjust the leveled generator for a reading of 1 800 1 digit and switch down to the X 01 setting The UUT s display reading should be from 0 180 to 0 186 after settling Filter check a Set the generator to X1 and adjust output amplitude for a display of 18 00 mV b On the front panel of the UUT set the FILTER switch to the in position c Verify that the UUT display is between 17 70 and 17 20 mV d On the front panel of the UUT set the FILTER switch to the out position e Set the generator to X 1 and adjust the output amplitude for a display of 1 800 mV f the front panel of the UUT set the FILTER switch to the in position g Verify that the UUT display is between 1 770 and 1 720 mV h Adjust the generator output amplitude for a UUT display of 1 800 mV 1 Set the generator to 01 j Verify that the UUT display is now between 180 and 182 mV 4 40 High Frequency Calibration 4 41 Use the following procedure to calibrate the UUT s high frequency response 1 For the ranges shown in Table 4 8 adjust the amplitude of the leveled generator at 50 kHz to establish a reference refer to Figure 4 7 forthetest 8922A setup Use one 20 dB attenuator for 0 1V two attenuators for 0 01V and three attenuators for 001V terminated with 50 ohms Take care not to o
19. Columbia SC 06141 Fairchild Weston Systems Inc Data Systems Div Sarasota FL 06192 La Deau Mfg Co Glendale CA 06229 Electrovert Inc Elmsford NY 06383 Panduit Corp Tinley Park IL 06473 Bunker Ramo Corp Amphenol NA Div SAMS Operation Chatsworth CA 06540 Mite Corp Amatom Electrical Div 06555 Beede Electrical Instrument Penacook NH 06665 Precision Monolithics Sub of Boums Inc Santa Clara CA 06666 General Devices Co Inc INpolis IN 06739 Electron Corp Littleton CO 06743 Gould Inc Foil Div Eastlake OH 06751 Components Inc Semcor Div Phoenix AZ 06776 Robinson Nugent Inc New Albany IN 06915 Richco Plastic Co Chicago IL 06961 Vernitron Corp Piezo Electric Div Bedford OH 06980 EIMAC See Varian San Carlos CA Federal Supply Codes for Manufacturers cont 07047 Ross Milton Co The Southampton PA 07138 Westinghouse Electric Corp Industrial amp Goverment Tube Div Horseheads NY 07233 Benchmark Technology Inc City of Industry CA 07239 Biddle Instruments Blue Bell PA 07256 Silicon Transistor Corp Sub of BBF Inc Chelmsford MA 07261 Avnet Corp Culver City CA 07263 Fairchild Semiconductor North Amencan Sales Ridgeview CT 07344 Bircher Co Inc The Rochester NY 07374 Optron Corp Woodbridge CT 07557 Campion Co Inc Philadelphia PA 07597 Bumdy Corp Tape Cable Div Rochester
20. Inc Walled Lake MI 66608 Bering Industries Freemont CA 66891 BKC Intemational Electronics Lawrence MA 66958 SGS Semiconductor Corp Phoenix AZ 66967 Powerex Inc Aubum NY 67183 Altera Santa Clara CA 68919 WIMA Harry Levinson Co Seattle WA 72361 Richmond Division of Dixico Zellerbach Paper Co Seattle WA TF844 Moore Business Forms Inc Seattle WA 7 902 Textron Inc Camcear Div Rockford IL 73395 Universal Plastics Welshpool WA 71696 AMD Plastics East Lake OH 7 354 Omni Spectra Inc Los Altos CA 72884 ALPS Seattle WA 7 634 Duracell USA Div of Dart amp Kraft Inc Valdese NC 70290 Almetal Universal Joint Co Cleveland OH 70485 Auantic India Rubber Works Inc Chicago IL 70563 Ampente Company Union City NJ 70903 Cooper Belden Corp Geneva IL 71002 Bimbach Co Inc Farmingdale NY 71034 Bliley Electric Co Erie PA 71183 Westinghouse Electric Corp Bryant Div Bridgeport CT 71279 Interconnection Products Inc Midland Ross Cambion Div Santa Ana 71400 Bussman Manufacturing Div McGraw Edison Co St Louis MO 71450 CTS Corp Elkhart IN Federal Supply Codes for Manufacturers cont 71468 ITT Cannon Div of ITT Fountain Valley CA 71482 General Instrument Corp Clare Div Chicago IL 71590 Mepco Centralab A North American Philips Co Fort Dodge 71707 Co
21. NY 07716 TRW Inc Can use 11502 IRC Fixed Resistors Burlington Burlington VT 07792 Lerma Enginecring Corp Northampton MA 07810 Bock Corp Madison 07910 Teledyne Semiconductor Min View CA 07933 Raytheon Co Semiconductor Div Mountain View CA 08 6 Calmos Systems Inc Kanata Ont Canada 0 0 9 Dallas Semiconductor Dallas TX 08111 MF Electronics New Rochelle NY 08235 Industro Transistor Corp Long Island City NY 08261 Spectra Strip An Eltra Co Garden Grove CA 08445 Electri Cord Mfg Inc Westfield PA 08530 Reliance Mica Corp Brooklyn NY 08718 ITT Cannon Electric Phoenix Div Phoenix AZ 08806 General Electric Co Minature Lamp Products Cleveland OH 08863 Nylomatic Fallsington 08988 Skouie Electronics Inc Archbald PA 09021 Airco Ine Airco Electronics Bradford PA 09023 Comell Dubhier Electronics Fuquay Varina NC 09214 General Electric Co Semiconductor Products Dept Aubum NY 09353 C and K Components Inc Newton MA 09423 Scientific Components Inc Santa Barbara CA 09922 Bumdy Corp Norwalk CT 09969 Dale Electronics Inc Yankton SD 09975 Burroughs Corp Electronics Components Detroit MI 1A791 LFE Electronics Danvers MA 18715 United Shoe amp Corp Nylock Fastener Corp Paramus NJ 10059 Barker Engineering Corp Kenilworth NJ 10389 IL Tool Works Inc Licon
22. ST4 through ST7 strobes the seven segment LEDs from LSD to MSD respectively STO gates the 1 digit If the volts display mode is selected 3 digits will be enabled resulting in a resolution of 0 05 If the dB display mode is selected 414 digits will be enabled and the resolution will be 0 01 dB The decimal point is enabled separately by the DP line from the controller 8922A CONTROLLER 3 43 the annunciators excepting the UNCAL are strobed on by STO which is routed through two circuits One path is completed when the dB VOLTS switch is in the dB position The dB annunciator DS309 is enabled If the REL dBm control 18 in the REL position RELA TIVE REFERENCE annunciator DS308 will also be enabled If the dB VOLTS switch is in the VOLTS position STO is routed through another path and either the V annunciator DS307 or the mV annunciator DS306 is enabled depending upon the current range of the instrument 3 44 Power Supply 3 45 The power supply section on the Main PCB provides the instrument with operating voltages of 15V 15 and 5V 3 46 Line voltage 100V 120V 220V or 240V as selected by switches S209 and S210 is connected to the primary of the main power transformer T200 via POWER switch S208 and fuse F1 the secondary of T200 contains two windings One winding drives the 5V power supply the other drives the 15V power supply 3 47 In the 5V power supply power from the secondary winding is
23. UNLESS OTHERWISE SPECIFIED LOGIC D ASN ALL RESISTANCE VALUES IN On MS Z ALL CAPACITANCE VALUES IN MICROFARADS Figure 8 5 004 Logarithmic Analog Output Option 8 10 ee m A
24. formerly Sprague Grafton WI 60911 Inmos Corp CO Springs CO 60935 Westlake Capacitor Inc Tantalum Div Greencastle IN 60958 ACIC Intercomp Wire amp Cable Div NC 61271 Fujitsu Microelectronics Inc San Jose CA 61394 SEEQ Technology Inc San Jose CA 61429 Fox Electronics Cape Coral FL 61529 Aromat Corp New Providence NJ 61752 IR ONICS Inc Warwick RI 61772 Integrated Device Technology Santa Clara CA 61802 Toshiba Houston TX 61857 SAN O Industrial Corp Bohemi Long Island NY 61935 Schurter Inc Petaluma CA 62351 Apple Rubber Lancaster NY 62643 United Chemicon Rosemont IL 62712 Seiko Instruments Torrance CA 62793 Lear Siegler Inc Energy Products Div Santa Ana CA 63743 Ward Leonard Electric Co Inc Mount Vernon NY 64154 Lamb Industries Portland OR 64155 Linear Technology Milpitas CA 64537 KDI Electronics Whippany NJ 64782 Precision Control Mfg Inc Bellevue WA 64834 West San Francisco CA 64961 Electronic Hardware LTD North Hollywood CA 65092 Sangamo Weston Inc Weston Instruments Div Newark NJ 65786 Cypress Semi San Jose CA 65940 Rohm Corp amp Irvine CA 65964 Evox Inc Bannockbum IL 66150 Entron Inc Winslow Teltronics Div Glendale NY 66302 VLSI Technology Inc San Jose CA 66419 Exel San Jose CA 66450 Dyna Tech Electronics
25. increment the meter to the 700V range Select autorange AUTO to downrange 2 50 Voltage Display Mode 2 51 The 8922A will display a voltage input in one of two measurement units volts or dB To display the input voltage in units of volts you must set the dB VOLTS switch to VOLTS The instrument will now display all input in units of volts or millivolts as indicated by the front panel annunciators V mV 2 52 Two points of interest about the volts display mode are as follows one if the input is completely unknown allow the autoranging circuit to select the appropriate range Two the selection of the volts display mode will not affect any previous reference established in the dB display mode see following paragraphs for additional information about establishing a dB reference 2 53 dB Display Mode 2 54 When the instrument is in its dB display mode all voltage inputs are referenced to a selected level and displayed as deviations in dB above or below that level If you wish to display the input voltage in dB units set the dB VOLTS switch to dB The instrument s front panel dB annunciator will now light indicating to you that the display is presenting a measurement in dB units 2 55 The instrument references all inputs to a selected level Before a meaningful measurement in dB units can be made the desired reference level 0 dB must be established See RELATIVE REFERENCE Selection and dBm REFERENCE 2
26. 1 8W COMP 15M 5 1 4W COMP 10K 5 1 4W MTL FILM 37 5K 1 8W RES MF 75K 0 1 1 8W RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES MTL FILM 150K 0 25 1 8W MTL FILM 100K 0 1 1 8W VAR 20K 10 1 2W MTL FILM 150K 0 25 1 8W COMP 45 1 4W MTL FILM 158K 1 1 8W WW 994 2 1 2W COMP 1M 5 1 4W MTL FILM 20K 0 1 1 8W MTL FILM 1 5M 1 1 2W COMP 1K 5 1 4W COMP 1M 5 1 4W COMP 1M 52 1 4W COMP 1M 52 1 4W MTL FILM 100K 5 1 8W MTL FILM 143K 1 1 8W CONNECTOR POST CONNECTOR POST CONNECTOR POST CONNECTOR POST IC C MOS HEX BUFFER INVERTER IC LINEAR OP AMP WIRE ASSEMBLY FLUKE STOCK NO ORDER 357806 105593 334185 423012 160226 160226 203323 203323 203323 162073 162065 456772 486688 295717 376475 369520 182204 182204 182204 168260 381491 148106 442947 370916 442707 370775 335760 442707 148163 237214 477018 182204 446443 284976 148023 182204 182204 182204 248807 291336 379438 379438 379438 379438 381848 402669 488163 MFG SPLY CODE 004 56289 71590 14752 56289 56289 56289 07910 07910 07910 74970 74970 89536 89536 21355 89536 89536 01121 01121 01121 91637 01121 01121 91637 91637 91637 91637 89536 91637 01121 91637 89536 01121 91637 91637 01121 01121 01121
27. 2 the Counter Output Option utilizes an isolation amplifier two Schmitt triggers pulse transformer and a DC DC power supply to provide an isolated output suitable for triggering a counter The isolation amp is used as a buffer between amplifier B s output and the first Schmitt trigger The Schmitt trigger drives the pulse transformer with a square wave at the same frequency as the sine wave input The pulse transformer provides isolation between the input common and output common The second Schmitt trigger is used to convert the pulse transformer output to the 100 mV square wave output at the same frequency as the sine wave input The DC DC power supply provides isolated 5 3V and 6 5V for the second Schmitt trigger 603 1 8922 COUNTER OUTPUT OPTION TESTED 1 2 Figure 603 1 Counter Output Option Installation 603 2 8922 INPUT FROM q 100 JUUU esoo SCHMITT TRIGGER SCHMITT TRIGGER OUTPUT TO REAR PANEL DC POWER SUPPLY L 5V Figure 603 2 Counter Output Option Simplified Schematic 603 11 MAINTENANCE 603 13 Performance Test 603 12 The following maintenance information covers three areas performance testing calibration and troubleshooting of the 003 Counter Output Option However before any of these procedures can be started the calibration of the mainframe instrument 8922A must be successfully completed The table of recommende
28. 2 43 Range Selection 2 44 Seven voltage ranges and what appears to be a single dB range spanning 132 dB are provided in the instrument Range selection is normally accomplished automatically Override switches however allow you to interrupt the autorange function and manually increment the range 2 45 The autorange function optimizes the display reading for a given input Each reading is displayed complete with decimal point and units annunciator The individual ranges are directly defined for the operator by labeled decimal points Underrange flashing decimal point and overrange flashing digits indications are provided to indicate when a range change is necessary 2 46 AUTORANGE 2 47 The proper measurement range is automatically selected when the HOLD AUTO switch is in the AUTO out position Both decimal point and units annunciator change automatically with range 2 48 MANUAL 2 49 Manual range determination is accomplished by selecting a range using the autorange mode and then depressing the HOLD AUTO switch The meter will stay in that range regardless of input level changes If the range becomes invalid for a given input level an overrange or underrange indication will flash If an underrange is indicated select autorange AUTO After the proper range is selected press HOLD For overrange conditions momentarily press the STEP UP switch once for each desired range increment Holding the switch in will
29. 240V Refer to the procedure in Section 4 to alter the line power configuration of the instrument We recommend that this procedure be performed by qualified personnel only 2 10 CONTROLS AND INDICATORS 2 11 The 8922A controls indicators and connectors are shown in Figure 2 2 and described in Table 2 1 Locate each feature on your DMM you read the description 2 1 8922 Figure 2 2 Controls Indicators and Connectors 10 11 12 13 14 15 8922 Table 2 1 Controls Indicators and Connectors cont NAME INPUT Analog Panel Meter Digital Display Annuniciators UNCAL RELATIVE REFERENCE 2 20 200 700 POWER Switch dBm REFERENCE REL dBm dB VOLTS STEP UP HOLD AUTO FILTER AC AC DC damping 1 FUNCTION A BNC input connector The low side is isolated from power ground through a pair of parallel diodes Uncalibrated panel meter provides analog tracking of input level useful for peaking and nulling indications LED display provides a direct readout of the input signal level includes decimal point and polarity LED s that light to indicate the selected measurement function V volts mV millivolts or dB decibels An LED that light to indicate that the instrument s internal protection circuitry is energized see Crest Factor under operating instructions An LED that lights to indicate that the voltmeter is in the dB display mode and u
30. 241 1939 Vietnam Schmidt Vietnam Co Ltd 8 Fl Schmidt Tower Hanoi Intemational Tech Ctr 8 Highway 32 Cau Giay Tu Liem Hanoi Vietnam TEL 84 4 346186 or 346187 FAX 84 4 346 188 West Indies Western Scientific Co Ltd Freeprot Mission Road Freeport Trinidad West Indies TEL 809 673 0038 FAX 809 673 0767 Yugoslavia Jugoelektro Beograd T amp M Customer Support Servicies Knez Mihailova 33 11070 Novi TEL 38 11 182470 FAX 38 11 638209 Zimbabwe Field Technical Sales 45 Kelvin Road North P O Box Cy535 Causeway Harare Zimbabwe TEL 263 4 750381 or 750382 FAX 263 4 729970 INTRODUCTION This appendix contains information necessary to backdate the manual to conform with earlier pcb configurations To identify the configuration of the pcb s used in your instrument refer to the revision letter marked in ink the component side of each pcb assembly Table 7 1 defines the assembly revision levels documented in this manual NEWER INSTRUMENTS As changes and improvements are made to the instrument they are identified by incrementing the revision letter marked on the affected pcb assembly 8922A Appendix 7A Manual Change Information These changes are documented on a supplemental change errata sheet which when applicable is inserted at the front of the manual OLDER INSTRUMENTS To backdate this manual to conform with earlier assembly revision levels perform the chang
31. 4 13 Fuse Replacement 4 14 The 8922A has one replaceable fuse located on the rear panel which may be replaced with a 1 8 amp slo blo fuse Metric uses 5x20 mm 1 8 amp slow acting 4 15 PERFORMANCE TEST NOTE In the following procedures the instrument 8922A which is being either checked or calibrated is referred to as the UUT Unit Under Test 4 16 The following paragraphs comprise a performance verification test which compares the instrument s performance to the specifications given in LINEAR ANALOG OUTPUT AC CALIBRATOR 5200A 8922A Section of this manual The test is recommended as an acceptance test when the instrument is first received and later as a calibration procedure to verify instrument accuracy at the scheduled calibration periods 90 days It can also be used as an aid in troubleshooting Test equipment required for the performance test is listed in Table 4 1 If the recommended test equipment is not available equivalent test equipment may be substituted To insure optimum results the test must be performed at an ambient temperature between 18 and 28 degrees Celsius with a relative humidity of 80 Allow the instrument to warmup at least 30 minutes with the case cover in place before attempting the performance test 4 17 If the instrument fails to meeet the performance test limits calibration adjustment troubleshooting and or repairs are indicated Procedures for calibration adjustments
32. 56 dBm Measurements 2 57 Measurements made to a fixed milliwatt reference are defined as dBm The 1 milliwatt reference is generally assumed as indicated by m However the system impedance must be specified for a particular measurement Once the impedance is selected the instrument will display its measurements in dBm 2 58 The 8922A is equipped with a rotary switch called dBm REFERENCE By setting the switch to 1 of 12 possible standard reference impedances 500 750 930 1100 1240 1350 1500 3000 6000 9000 10000 and 12000 you establish that impedance as a reference When the system impedance and the reference are the same the display is in terms of dBm NOTE If the 1000 ohm reference impedance is selected onthe rotary switch the0 dB point will correspond to 17 2 59 dBm REFERENCE SELECTION 2 60 Use the following procedure to select a reference impedance and enable the dBm display mode 1 Depress the dB VOLTS switch in 2 Release the REL dBm switch out 3 Set the dBm REFERENCE switch to correspond with the system impedance 8922 NOTE The dBm REFERENCE switch does not affect the fixed 10 input impedance of the 8922A Allimpedance matching terminations must be added externally by the operator 2 61 Relative Measurements REL 2 62 This feature allows you to make any voltage input a 0 dB point to which all other voltage inputs may be referenced F
33. 71744 83058 TRW Assemblies amp Fasteners Group Fasteners Div Cambndge MA 3259 Parker Hannifin Corp O Seal Div Culver City CA 83298 Bendix Corp Electric amp Fluid Power Div Eatonville NJ 83315 Hubbell Corp Mundelein IL 83330 Kulka Smith Inc A North American Philips Co Manasquan NJ 83478 Rubbercraft Corp of America West Haven CT 83553 Associated Spring Barnes Group Gardena CA 83740 Union Carbide Corp Battery Products Div Danbury CT 84171 Arco Electronics Commack NY 84411 American Shizuki TRW Capacitors Div Ogaliala NE 84613 FIC Corp Rockville MD 84632 Essex Group Inc Peabody MA 84830 Lec Spring Co Inc Brooklyn NY 85367 Bearing Distributing Co San Fransisco CA 85372 Bearing Sales Co Los Angeles CA 85480 W H Brady Co Industrial Product Milwaukee WI 85840 Brady WH Co Industrial Products Div Milwaukee WI 85932 Electro Film Inc Valencia CA 86577 Precision Metal Products Co Pcabody MA 86684 Radio Corp of America Now 54590 86923 Seastrom Mfg Co Inc Glendale CA 87034 Illuminated Products Inc Now 76854 87516 Standard Crystal KS Ciy KS 88044 Aeronautical Standards Group Dept of Navy amp Air Force 88219 GNB Inc Industrial Battery Div Langhome PA 88245 Winchester Electronics Litton Systems Useco Div Van Nuys CA 88486 Tnangle PWC Inc Jewitt City CT 88690 Essex
34. Avenue Palatine IL 60067 TEL 708 705 0500 FAX 708 705 9989 New Jersey Fluke Service Center W 75 Century Rd Paramus N J 07652 0930 TEL 201 599 9500 599 0919 FAX 201 599 2093 Texas Fluke Service Center Dallas 2104 Hutton Drive Suite 112 Carrollton TX 75006 TEL 214 406 1000 FAX 214 406 1072 Washington Fluke Service Center Fluke Corporation Building 4 1420 75TH St S W Everett WA 98203 TEL 206 356 5560 FAX 206 356 6390 PN 850941 INTERNATIONAL Australia Phillips Sci and Ind Pty L 745 Springvale Road Mulgrave Victoria 3170 TEL 61 3 881 3666 FAX 61 3 881 3636 Phil Sci amp Ind BIk F Centrecrt 34 Waterloo Road North Ryde N S W 2113 TEL 61 2 888 8222 FAX 61 2 888 0440 Austria Fluke Vertriebsges GMBH GM SudrandstraBe 7 P O Box 10 A 1232 Vienna TEL 43 1 614 100 FAX 43 1 614 1010 Bahrain Mohammed Fakhroo amp Bros P O Box 439 Bahrain TEL 973 253529 FAX 973 275996 Belgium N V Fluke Belgium S A Sales amp Service Dept Langeveldpark Unit 5 amp 7 P Basteleusstraat 2 4 6 1600 St Pieters Leeuw TEL 218 2 331 2777 ext 218 FAX 32 2 331 1489 Bolivia Casilla 7295 Calle Ayacucho No 208 Edificio Flores 5to Piso La Paz Bolivia TEL 591 2 317531 or 317173 FAX 591 2 317545 Brazil Philips Medical Systems LTDA Av Interlagos North 3493 Campo Grande 04661 200 Sao Paulo S P TEL 55 11 523
35. Corp Eltronics Div Rancho Dominquez 03877 Gilbert Enginecring Co Inc Incon Sub of Transitron Electronic Corp Glendale AZ 03888 KDI Electronics Inc Pyrofilm Div Whippany NJ 03911 Clairex Corp Claircx Electronics Div Mount Vernon NY 03980 Muirhead Inc Mountainside NJ 04009 Cooper Industries Inc Arrow Hart Div Hanford 04217 Essex Intemational Inc Wire amp Cable Div Anaheim CA 04221 Midland Ross Corp Midtex Div N Mankato MN 04222 AVX Corp AVX Ceramics Div Myne Beach SC 04423 Telonic Berkley Inc Laguna Beach CA 04713 Motorola Inc Semiconductor Group Phoenix AZ 04946 Standard Wire and Cable Rancho Dominquez CA 05173 General Radio Replaced by 24655 Genrad INC Concord MA 05236 Jonathan Mfg Co Fullerton CA 05245 Corcom Inc Libertyville IL 05276 ITT Pomona Electronics Div Pomona CA 05277 Westinghouse Elec Corp Semiconductor Div Youngwood PA 05347 Ultronix Inc Grand Junction 05397 Union Carbide Corp Materials Systems Div Cleveland OH 05571 Sprague Electric Co Now 56289 05574 Viking Connectors Inc Sub of Criton Corp Chatsworth CA 05791 LYN TRON Burbank CA 05820 EG amp G Wakefield Engineering Wakeficld MA 05839 Advance Electrical Chicago IL 05972 Loctite Corp Newington CT 06001 General Electric Co Electric Capacitor Product Section
36. EUR C LOGARITHMIC ANALOG OUTPUT 303 1 1501 14 4 3103 2 1 9 153 Man 2 1 sorat aver 3 gt VIN 3107 4 gt PEA e V 0 4108 5210 033 01 969 GND 0 Z 20 04 2200W 0710 03026 3 VE KEN nov 1 _ gt TN 8 FI 19705 7109 O O KI 3101 5 54K LINEAR 20 8 ANALOG K2 Q6 201 3 517 OUTPUT 7 928 930 x 2758 9 FI 8 529 015 22 Wer wv IN at 00 00 Fr 2 000v 20 700_ Jr J203 unm 3103 3 gt EN SA 2 gt 5 Jio 9 gt 45 P N I02 4 gt EN Nee E EE 14 exwsT 221 205 5202 5 e po TOOK 9107 8 4 ISV Si Ul B 4103 0 0 SOURCE x 97 05 2 DEL POINT i i Pa 9105 5 gt 5 STROBES r DP 20 202 MOT 2 RD 7 65 43272 1 GND 4 Eg eh I sss i 4 SENSE V 0 5 4103 8 215 OK caso 350 8 03024 I5N 51 L0 SENSE ag 72 lt 4501 10 v C 2 8922 INPUT V NEN Y Wis 500 BFE E TP200 15V dao ey CRI DE S Lus on LIBKe 19 1552 1153 01 2 wio F TIT h
37. FAX 361 161 1021 Iceland Taeknival HF P O Box 8294 Skeifunni 17 128 Reykjavik TEL 354 1 681665 FAX 354 1 680664 India Philips India Limited Band Box House 254 Dr Annie Besant Road Bombay 400 025 TEL 91 22 493 0311 FAX 91 22 495 0498 Hinditron Services Pvt Inc 33 44A 8th Main Road Raj Mahal Vilas Extension Bangalore 560 080 TEL 91 80 334 8266 or 0068 FAX 91 80 334 5022 Hinditron Services Pvt Ltd Hinditron House 23 B Mahal Industrial Estate Mahakali Caves Rd Andheri East Bombay 400 093 TEL 91 22 836 4560 6590 FAX 91 22 836 4682 Hinditron Services Pvt Ltd Castle House 5th Floor 5 1 A Hungerford Street Calcutta 700 017 TEL 91 33 400 194 FAX 91 33 247 6844 Hinditron Services Pvt Ltd 204 206 Hemkunt Tower 98 Nehru Place New Delhi 110 019 TEL 91 11 641 3675 or 643 0519 FAX 91 11 642 9118 Hinditron Services Pvt Ltd Field Service Center Emerald House 5th Floor 114 Sarojini Devi Road Secunderabad 500 003 TEL 91 40 844033 or 843753 FAX 91 40 847585 Indonesia P T Daeng Bro Phillips House J n H R Rasuna Said Kav 3 4 Jakarta 12950 TEL 62 21 520 1122 FAX 62 21 520 5189 or 62 21 520 5189 Israel R D T Equipment amp Sys Ltd P O Box 58072 Tel Aviv 61580 TEL 972 3 645 0745 FAX 972 3 647 8908 1 96 Italy Fluke Italia S R L CSS Viale Delle Industrie 11 20090 Vimodrone TEL 39 2 268 434 203 or 4341 FAX 39 2 250 1645
38. Group Inc Wire Assembly Div Dearbom MI 88786 Atlantic India Rubber Co Goshen IN 88978 Philips Now Fluke Mahwah NJ 89020 Amerace Corp Buchanan Crimptool Products Div Union NJ 89265 Potter Brumfield See 77342 89462 Waldes Truarc Inc Long Island NY 89536 John Fluke Mfg Co Inc Everett WA 89597 Fredericks Co Huntingdon Valley 89709 Bunker Ramo Eltra Corp Amphenol Div Broadview IL 89730 General Electric Lamp Div Newark NJ 9R216 Data Composition Svc Inc Laurel MD 9S171 Port Plasucs Tukwila WA 9W423 Amatom Mont 90201 Mallory Capacitor Sub of Emhart Industries Inc Indianapolis IN 90215 Best Stamp amp Mfg Co KS City MO 90303 Duracell Inc Technical Sales amp Markcting Bethel CT 91094 Essex Group Inc Suflex IWP Div Newmarket NH 91247 IL Transformer Co Chicago IL 91293 Johanson Mfg Co Boonton NJ 91462 Alpha Industrics Inc Loganspo zt IN 91502 Associated Machinc Santa Clara CA 91506 Augat Alcoswitch Andover 91507 Frocliger Machine Tool Co Stockton CA 91637 Dalc Electronics Inc Columbus NE 91662 Elco Corp A Gulf Western Mfg Connector Div Huntingdon PA 91737 ITT Cannon Gremar Now 08718 91802 Industria Devices Inc Edgewater NJ 91833 Keystone Electronics Corp NY NY 91836 King s Electronics Co Inc Tuckahoc NY 91929 Honeywel
39. Inc Formerly Wabash Magnetics Wabash IN 01121 Allen Bradley Co Milwaukee WI 01281 TRW Electronics amp Defense Sector RF Devices Lawndale CA 01295 TX Instruments Inc Semiconductor Group Dallas TX 01526 Genicom Wayncsboro 01537 Motorola Communications amp Elcctronics Inc Franklin Park IL 01686 RCL Electronics Shallcross Inc Electro Components Div Manchester NH 01884 Sprague Electric Co 56289 01961 Varian Associates Inc Pulse Engincering Div Convoy CT 01963 Cherry Electrical Products Corp Waukegan IL 02111 Spectro Electronics Corp City of Industry CA 02114 Amperex Electronic Corp Cube Div Saugerties NY 02131 General Instrument Corp Government Systems Div Westwood MA 02395 Sonar Radio Corp Hollywood FL 02533 Leigh Instruments Ltd Frequency Control Div Don Mills Ontario Canada 02606 Fenwal Labs Division of Travenal Labs Morton Grove IL 02660 Bunker Ramo Eltra Corp Amphenol NA Div Broadview IL 02697 Parker Hannifin Corp O Ring Div Lexington KY 02735 RCA Solid State Div Somerville NJ 02768 ITW IL Tool Works Fastex Division Des Plaines IL 02799 Arco Electronics Inc Chatsworth CA 03296 Nylon Molding Corp Monrovia CA 03445 Lercon Electronics Inc Burbank CA 03508 General Electric Co Semiconductor Products amp Bateries Aubum NY 03797 Genisco Technology
40. LINE 5 NOT SHOWN 417899 SOCKET IN LINE 5 NOT SHOWN 417899 SOCKET IN LINE 9 NOT SHOWN 436774 SOCKET IN LINE 9 NOT SHOWN 436774 1 IF ANY ONE OF THE FOUR MATCHED XSTRS ARE DAMAGED ALL FOUR WILL HAVE BE REPLACED AND THE DC SET RESISTORS FOR AND WILL HAVE TO BE RESELECTED THERE FORE IT WILL BE NECESSARY TO ORDER TWO RESISTOR SETS SEE SECT 4 DC OFFSET RESISTOR SELECTION 2 IF THIS PART IS REPLACED THE DC OFFSET RESISTOR FOR THE CORRESPOND ING AMPLIFIER MAY HAVE TO BE RESELECTED SEE SECT 4 DC OFFSET RESISTOR SELECTION Q9 AND R17 Q37 AND R46 MATCHED PAIRED SETS PART NUMBER 476700 3 Q1 AND Q2 XSTR MUST BE COLOR MATCHED MFG SPLY CODE 02735 07910 07910 07910 52072 52072 52072 52072 MFG PART NO OR TYPE CA3046 IN752A IN752A INQ64B CA 05S TSD CA 05S TSD CA 09S TSD CA 09S TSD 8922A TOT 0 REF REF N 0 8922 5 YNIA NI 311915 lt S310N 2 an EE o 22 27 5 8922 1603 2 25981 4 683 655 ale lt 22785 Figure 5 4 2 AC PCB Assembly 4 8 1 130 5 18 OPTION MODEL NO Y2014 2015 2020 8922 003 8922A 004 8922A 521 8922A 529 8922A Section 6 O
41. Norway A S Cust Support P O Box 6054 Etterstad N 0601 Oslo TEL 47 22 653400 FAX 47 22 653407 Pakistan Philips Philips Elec Ind of Prof Sys Div Islamic Cham of Commerce St 2 A Block 9 KDA Scheme 5 Clifton Karachi 75600 TEL 92 21 587 4641 or 4649 FAX 92 21 577 0348 Peru Impor amp Repres Electronicas S A JR Pumacahua 955 Lima 11 TEL 51 14 23 5099 FAX 51 14 31 0707 Philippines Spark Electronics Corp P O Box 610 Greenhills Metro Manila 1502 TEL 63 2 700 621 FAX 63 2 721 0491 or 700 709 Poland Elec Instr Srv Philips Cons UL Malechowska 6 60 188 Poznan TEL 48 61 681998 FAX 48 61 682256 Portugal Fluke Iberica S L Sasles Y Services Dept Campo Grande 35 7b 1700 Lisboa TEL 351 1 795 1712 FAX 351 1 795 1713 Romania Ronex S R L Cust Supp Serv Str Transilvaniei Nr 24 70778 Bucharest TEL 40 1 614 3597 or 3598 FAX 40 1 659 4468 Russia Infomedia UL Petrovsko Razumovsky Proezd 29 103287 Moscow TEL 7 95 212 3833 FAX 7 95 212 3838 Saudi Arabia A Rajab amp Silsilah Co S amp S Dept P O Box 203 21411 Jeddah TEL 966 2 661 0006 966 2 661 0558 Singapore Fluke Singapore Pte Ltd Fluke ASEAN Regional Office 27 03 PSA Building 460 Alexandra Road Singapore 119963 TEL 65 276 5161 FAX 65 276 5929 South Africa Spescom Measure PTY Ltd Spescom Park Crn Alexandra Rd amp Second St Halfway H
42. RES COMP 300 5 1 4W RES COMP 300 5 1 4W RES COMP 18 5 1 4W RES COMP 18 5 1 4W FILM 1K 1 1 8W FILM 49 9 0 1 FILM 7 50 1 1 8W FILM 51 1 1 1 8W 1K 5 1 4W RES MTL RES MIL RES HTL RES MIL RES COMP RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RES MATCHED PAIR R98 106 RES MTL FILM 20 5K 1 1 8W RES MTL FILM 499K 12 1 8W RES VAR CER 10K 10 1 2W RES MTL FILM 357K 1 1 8W RES MTL FILM 110K 1 1 8W RES MTL FILM 20 5K 1 1 8W RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RES MATCHED PAIR SEE R98 RES MTL FILM 82 5K 1 1 8W RES MTL FILM 82 5K 1 1 8W RES MTL FILM 2K 1 1 8W RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RES COMP 510 5 1 4W RES MTL FILM 14 3K 1 1 8W RES MTL FILM 1K 1 1 8W RES COMP 150K 52 1 4W RES COMP 270K 5 1 4W RES COMP 1M 5 1 4W RES COMP 1M 5 1 4W RES COMP 10M 5 1 4W RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RES COMP 100K 5 1 4W RES COMP 100K 5 1 4W RES 150K 102 1 2W RES COMP 5 6 5 1 4W RES COMP 5 1K 52 1 4W RES COMP 1M 5 1 4W RMS SENSOR AMP IC LINEAR OP AMP IC LINEAR OP AMP FLUKE STOCK NO 147926 148015 313072 148130 175034 261859 348276 348276
43. STRAP ASSY BRIDGE RECTIFIER WIRE ASSY BRIDGE RECTIFIER WIRE ASSY FUSE HOLDER FUSE FUSE SOCK SOCK SOCK HOLDER CAP GREY 1 4 X 1 1 4 ET RESISTOR ET IC 14 ET IC 40 5 IF VR201 IS REPLACED THE A D CALIBRATION RESISTOR R20H MAY HAVE TO BE RESELECTED SEE SECT 4 A D CALIBRATION RESISTOR SELECTION FLUKE STOCK NO 363838 428862 418954 381848 355198 419002 381848 404681 418566 413740 _ 381988 460410 355107 159798 486654 486662 486605 135541 486621 115733 115717 486647 486639 135541 375188 460238 343285 370304 429282 MFG SPLY CODE 02735 02735 02735 02735 02735 02735 02735 02735 18324 18324 04713 12040 07236 07910 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 0779 01295 09922 CDAO16AE CA3130 CA30963E CD40H9AE CD4011AE CA3086E CDH4OH9AE CD4O69UBE LM358 CR999 LM307N 32020120 LM317T F78050C INT51A 486654 476662 486605 135541 486621 115133 115717 486647 486639 135541 375188 460238 2 33127 6 931402 DILBHOP 108 QTY 0 lt gt REF trj c rr 8922A Im oz d 5 9 8922 022 001 0 1 021 001 weeds 5 ki NI SNOILVNI LS3Q0 S3 L VNDIS3Q 3 9 318 1 A18
44. Sacramento CA 18377 Corp Methuen MA 18520 Sharp Electronics Corp Paramus NJ 18542 Wabash Inc Wabash Relay amp Electronics Div Wabash IN 18565 Chomezcs Inc Wobum 18612 Vishay Intertechnology Inc Vishay Resistor Products Group Malvem 18632 Norton Chemplast Santa Monica CA 18677 Scanbe Mfg Co Div of Zero Corp El Monte CA 18736 Voltronics Corp East Hanover NJ 18786 Micro Power Long Island City NY 18927 GTE Products Corp Precision Material Products Business Parts Div Timsville PA 19080 Robinson Electronics Inc San Luis Obispo CA 19112 Garry Corp Langhome PA 19315 Bendix Corp The Navigation amp Control Group Terboro NJ 19451 Perine Machine Tool Kent WA 19482 Delta Electronics Alexandna 19613 MN Mining amp Mfg Co Textool Products Dept Electronic Product Div Irving TX 19647 Caddock Electronics Inc Riverside CA 19701 Mepco Centralab Inc A American Philips Co Mineral Wells TX 2B178 Wire Products Cleveland OH 2K262 Boyd Corporation Portland OR Federal Supply Codes for Manufacturers cont 2 384 North American Philips Lighting Corp Van Wen OH 20584 Enochs Mfg Inc INpolis IN 20891 Cosar Corp Dallas TX 21317 Electronics Applications Co El Monte CA 21604 Buckeye Stamping Co Columbus OH 21845 Solitron Devices Inc Semiconductor Group R
45. Timer for frequency ratio measurement with 10 sec gate interval and the set to AC FUNCTION VOLTS DISPLAY MODE and 200 MV RANGE HOLD 6 Referring to Table 603 3 change input to UUT as indicated and note that display values are within indicated tolerances 603 3 8922 BNC ADAPTER AC CALIBRATOR FLUKE 5200A UUT FRONT COUNTER SUE OSCILLOSCOPE TEKTRONIX 475 Figure 603 3 Counter Output Performance Set Up Table 603 2 Counter Output Amplitude Table 603 3 Counter Output Frequency Response AC CAL COUNTER TIMER UUT OSCILLOSCOPE 56503 UUT IBRATOR COMMENTS DISPLAY 1 COMMENTS 209 O DI OUTPUT DISPLAY DISPLAY 20 UTPUT SPLAY DIGIT 1 00000 Adjust the 1 900 Observe 100 Adjust calibrator SG503 squarewave obtain output to obtain Observe 100 mV Adjust calibrator display squarewave output to obtain UUT display 1 00000 Adjust the 56503 output to obtain UUT display UNIVERSAL COUNTER TIMER FLUKE 1953A LEVELED SINE WAVE 500 44 44 TERM EE TEK SG503 A INPUT BNC TO GR ADAPTER UUT FRONT GR TO BNC ADAPTER Figure 603 4 Counter Output Performance Test Set Up 603 4 603 15 CALIBRATION ADJUSTMENT 603 16 The Counter Output Option should be adjusted when it 15 first installed or if the limits as stated in the performance test cannot be met Use the following procedure to calibrate the Cou
46. and or when the instrument fails the performance test requirements If the instrument will not respond to or meet the limits of the adjustment 4 31 To ensure optimum results the calibration procedures troubleshooting and repair is indicated adjustments must be performed at an ambient Equipment required for the calibration adjustment is temperature of 18 to 28 degrees Celsius with a relative listed in Table 4 1 humidity of less than 80 Allow the instrument to warmup with the top case cover in place for at least 60 4 30 All calibration adjustments are accessible when minutes before starting the calibration adjustment the top case cover is removed from the instrument Figure procedures 4 7 8922 203 208 206 207 205 229 lt q 60259 022 001 Ove 022 021 001 1 02222 19 3503 OL a125 6184 101 Zor 4 n Figure 4 5 Calibration Adjustments and Test Point Locations 8922 U1 RMS SENSOR R127 st TP5 C33 TP2 R44 Figure 4 5 Calibration Adjustments and Test Point Locations cont 4 9 8922 4 32 Power Supply Calibration 2 Monitor TP206 with a DVM using 205 Adjustment as a voltmeter common WARNING 3 Adjust R229 for 15V 0 1V on TP206 IN ALL PROCEDURES WITH THE TOP 4 Check TP208 for 15 0 2V COVER REMOVED THE OPERATOR SHOULD BE AWARE THA
47. annunciator remains lit Verify that display flashes 1 999 signifying overrange 01 Measure 1V on the linear analog output Note that the test instrument s reading is within 01V of UUT s displayed reading 002V Measure 0 2 on linear analog output Note that the test instrument s reading is within 002 of displayed reading Verify that decimal flashes signifying below 996 of range 5 Note that the V annunciator is lit 5 Note that the V annunciator remains lit 5 Note that the V annunciator remains lit 10 Note that the UUT autoranges down to the 20 mV range 3 Use the 5205A for this test 50 Use rms voltmeter and function 4107 generator digit fluctu ation 4 20 dB Display Mode Check 4 21 This procedure will verify that the UUT s dB display mode is functioning properly Set up the test equipment as shown in Figure 4 1 Depress the RANGE HOLD switch and step up to the 2V range Select the 1V range on the AC calibrator and adjust its output for 1 000 on the UUT s display Select the dB display mode and switch through the dBm REFERENCE selection switch checking the reading at each position against Table 4 4 The readings should not differ by more than 1 digit from the numbers given in Table 4 4 4 22 DC Low Level Check 4 23 This procedure will verify correct operation with low level DC inputs Set up the test equipment as shown in Figure 4 2 and select the required f
48. as a field installable kit a copy of this manual will be provided Order the 892 529 when ordering this option at the same time you order your 8922A Order 892X A529 if you already have an 8922A and want a field installable kit 6529 1 6529 2 803759 10 93 Section 7 General Information 7 1 This section of the manual contains generalized user information as well as supplemental information to the List of Replaceable Parts contained in Section 5 D9816 Westermann Wilhelm Augusta Anlage Mannheim Nackarau Germany S0482 Sony Corp Tokyo Japan S3774 Oshino Electric Lamp Works Tokoyo Japan OADS6 IN Gencral El Paso TX OAE89 Autosplice Inc Woodside NY OBW21 Nonitake Co Inc Burlington MA OANFO Topaz Semiconductor Inc San Jose CA ODSM7 Conductive Pkg Containers Inc Brookfield WI OCLN7 Emhart Fastening Group Shelton CT 81 S Mos Systems Inc San Jose CA Eveready LTD Ever Ready Special Battery Div Dawicy Telford Salop UK 00199 Marcon Electronics Corp Keamy NJ 00213 Nytronics Comp Group Inc Darrlingon NC 00327 Welwyn Intemational Inc Westlake OH 00656 Aerovox Corp New Bedford MA 00686 Film Capacitors Inc Passaic NJ 00779 AMP Inc Harnsburg Pennsylvania 00853 Sangamo Weston Inc Components Div Pickens NC 01091 Allied Plastics Co Los Angeles CA 7 2 Federal Supply Codes for Manufacturers 01101 Wabash
49. control settings For this reason the Performance Check is suggested as a first step in troubleshooting The Performance Check may also help to localize the trouble to a particular section of the instrument If the Performance Check fails to localize the trouble the following information may be helpful Location of principal circuitry areas test points and adjustment locations of the Model 8922A are shown in Figure 4 5 INSTRUCTION ves 10 11 16 17 18 20 21 22 23 24 25 26 27 28 29 Table 4 9 8922 Troubleshooting Procedure All front panel switches should be in the out position Connect the UUT 8922 to appropriate line power and observe the display Does display light correctly Apply 1V ac input to UUT select AC function VOLTS display mode and AUTORANGE Does UUT respond to input Does UUT pass the Low Midband Check Does UUT pass the Low Level DC Check Does UUT pass the High Frequency Response Check UUT operating properly Apply 1V ac to UUT in the 2V ac range Check appropriate display drivers 0200 0204 Correct power supply test point voltages are as follows 206 15 TP207 5V TP205 power supply ground Is TP206 at 15V Is TP208 at 15V Is 207 at 5V Power supply is operating properly Check voltage between 201 and 202 Is the voltage 0 5V 510 Does null peak meter read approximately scale
50. full wave rectified by CR205 filtered by C211 and regulated by VR203 3 48 In the 15V power supply power from the secondary winding is full wave rectified by CR204 filtered by C209 and C210 and regulated to 15 by VR202 The 15V is regulated by U211 and Q207 REF RANGE CONTROL CONTROL W X Y Z BLK FRONT PANEL COMMANDS 1 98 ANNUNCIATORS V mV dB 2 MHz REL 41 SEVEN SEGMENT DECODER Figure 3 8 Display and Annunciators 3 10 8922 Section 4 Maintenance WARNING THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE _ QUALIFIED TO DO SO 4 1 INTRODUCTION 4 2 This section of the manual contains maintenance information for the Model 8922A True RMS Voltmeter The material is presented under the categories of shipping information general maintenance performance test calibration adjustments and troubleshooting The performance test is recommended as an acceptance check when the instrument 15 first received and as performance _ verification test at regular intervals Table 4 1 lists the test equipment required to calibrate your 8922A If the recommended equipment is not available you may substitute equivalent equipment that meets the required characteristics 4 3 SERVICE INFORMATION 4 4 8922 is warranted for a peri
51. must be added or subtracted from the count The dBm REFERENCE rotary switch connects one of the eight strobes to RD and J The controller responds by sending the appropriate constant to its ADD SUB 3 37 Referring to Figure 3 7 let s assume that a 600 ohm reference impedance is selected and the instrument has previously made a relative measurement Strobe zero will be applied to RD until the REL dBm switch is placed in its dBm position At this time strobe 4 corresponding to 600 ohms is applied to RD and causes the controller to select the 600 ohm reference impedance data This data along with the range and polarity data is then shifted to the ADD SUB where it 1s combined with the count referenced to 1200 ohms The resultant value is now equivalent to a dBm reading referenced to 600 ohms The range and polarity data is held in the reference latches until RD or J detect a strobe change or unless the instrument 15 turned off Switching to the VOLTS mode will not cause the data in the reference latches to be lost 3 38 Relative REL Reference 3 39 Relative reference measurements allow any voltage input to become the 0 dB point to which all subsequent voltage inputs are referenced The controller makes a relative reference computation much the same way it made a dBm computation However in the REL mode 0 dB no longer refers exclusively to 1 mW The following explains how the controller makes a relative reference measurement 3 4
52. 0 28480 28480 28480 28480 28480 28480 28480 28480 00779 89536 01121 01121 01121 01121 01121 89536 01295 C301 P301 18000000000 9 8922 MFG PART NO 0 QTY 0 156921 REF 196D105X0035JA1 1 114448 1 1 QDSP 3507 1 QDSP3515 lj QDSP3515 REF QDSP3515 REF QDSP3515 REF 5082 4887 5 5082 4887 5082 4887 5082 4887 REF 5082 4887 REF 3 87022 1 18 340026 1 1 CB1515 3 CB2725 1 CB1515 REF CB1535 1 1515 REF 461442 1 SN74L47N 1 1 10 8920 1602 Figure 5 3 A1A1 Display PCB Assembly 8922 2 C1 C2 C3 5 6 C7 C8 C9 C12 C13 C14 C15 C16 C1T C18 C19 C20 C24 C25 C26 C28 C29 C31 C33 C34 C35 C36 C37 C39 C40 C41 C42 C43 C45 C48 C49 C50 C51 C53 C54 C55 C56 C57 C59 C60 C61 5 12 Table 5 4 A2 AC PCB Assembly DESCRIPTION AC PCB ASSEMBLY FIGURE 5 4 8922A 4003 CAP POLYESTER 0 022 UF 10 6301 PORC 180 PF 5 1 KV 4 3 0 25 1 7 KV CAP CER 510 PF 5 100V CAP VAR 1 5 0 25 PF 2000V 39 PF 5 100V 5100 PF 5 100V VAR 5 5 18 PF 350V CAP VAR 1 7 6 PF 250V CAP CER 10 000 20 100V CAP VAR 1 5 0 25 PF 2000V CER 4 7 0 25PF 100V CER 50 000 20 80 25V
53. 0 Referring the Figure 3 7 you can see that upon selection of the REL mode the reference impedance data line will be disabled However to make a relative 3 9 8922 reference measurement the controller must use an initial reading and to obtain an initial reading it must use a reference impedance Therefore before the REL mode can be selected the controller must be allowed to make at least one complete measurement while in the dBm mode Once the measurement has been completed the REL mode may be selected The reading will now be fed back to the reference latches and held The controller will subtract the reading in the reference latches from all subsequent readings Note that if the instrument is ranged up down 20 dB will be added to or subtracted from the reading held in the reference latches The reading held in the reference latches however will be lost any time the instrument is turned off or if the REL switch is released 3 41 Display and Annunciators 3 42 The computed value of the input to the instrument 16 transmitted serially as four bit BCD characters on the W X Y and Z data lines from the controller to the seven segment decoder see Figure 3 8 Display and Annunciators The output of the seven segment decoder drives the Display Data Bus which is common to the inputs of all five of the display LEDs Strobe pulses from the controller determine which display LED is enabled to accept the data on the Display Data Bus
54. 0 2 mV To achieve this set the FILTER 6 counts switch to the IN position The mV ac compon ent can be measured by temporarily selecting the AC switch If it is greater than 0 2 mV mV rms 54 2 mV dc mV ac BNC CONNECTOR GR TO BNC ADAPTER ATTENUATOR INPUT 20dB 20dB TERM SHIELDED ATTENUATOR 892 CABLE OUTPUT EA Figure 4 3 AC Low Level Check 8922 PRECISION CABLE Figure 4 4 High Frequency Response Check COMMENTS Adjust the 50503 amplitude so that the display reads 17 00 Table 4 6 High Frequency Response Check INPUT DISPLAY LEVEL F Hz LIMITS COUNTS FUNCTION RANGE AC AUTORANGE Readjust the input frequency without changing the amplitude AC AUTORANGE Adjust the 56503 amplitude so the display reads 170 0 AC AUTORANGE Readjust the input frequency without changing the amplitude AC AUTORANGE Adjust the SG503 amplitude so the display reads 1 700 AC AUTORANGE Readjust the input frequency without changing the amplitude AC AUTORANGE 4 28 CALIBRATION ADJUSTMENTS 4 5 identifies the location of assemblies test points and adjustments that must be accessed to complete the 4 29 The calibration adjustment procedures given in calibration adjustment procedures the following paragraphs should be performed after repair of the 8922A
55. 1 4W 182204 01121 CB1055 REF R62 RES COMP 1M 5 1 4W 182204 01121 CB1055 R63 RES COMP 6 2M 5 1 4W 221960 01121 CB6255 REF R65 RESISTOR SET SEE R18 REF R66 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 R67 RES COMP 510 5 1 4W 218032 01121 5115 REF R68 RES MTL FILM 3 48K 1 1 8W 260687 91637 CMF553481F 1 R69 RES COMP 100 5 1 4W 147926 01121 CB1015 REF R70 RES COMP 33 5 1 4W 175034 01121 CB3305 REF R71 RES MTL FILM 499K 1 1 8W 268813 91637 CMF554993F REF R72 RES VAR CER 100K 10 1 2W 369520 89536 369520 REF R73 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R74 RES COMP 8 2K 5 1 4W 160796 01121 CB8225 REF R75 RES COMP 10K 5 1 4W 148106 01121 1035 REF R76 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 R77 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R78 RES MTL FILM 619 1 1 8W 313072 91637 CMF556190F R79 RESISTOR SET SEE R18 REF 8922 R80 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R114 R115 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 U1 U2 U3 U4 5 16 Table 5 4 A2 AC PCB Assembly cont DESCRIPTION RES COMP 100 5 1 4W RES COMP 820 5 1 4W RES MTL FILM 619 1 1 8W RES COMP 22K 5 1 4W RES COMP 33 5 1 4W RES COMP 160 5 1 4W
56. 114504 149534 256156 335158 464115 456764 467555 467563 473645 454736 454751 456848 333123 454702 473652 467548 467571 492298 104091 289504 289504 237214 285296 168278 168278 293696 458463 522052 MFG SPLY CODE ONLY 89526 89536 13134 73734 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 89536 895 36 89536 89536 89536 89536 895 36 89536 89536 89536 89536 MFG PART OR TYPE REPLACEABLE PARTS 510602 114504 19002 23022 335158 464115 456764 467555 467563 473645 454736 454751 456848 343723 454702 473652 467548 467571 492298 104091 289504 289504 237214 285296 168278 168278 293696 458463 522052 TOT REC QTY QTY N 8922 gt 5 3 8922 1 2 2 H2 2 e 55220 P 12 2 13 2 1 a 2 gt 1 sux 2 2 4 8 Figure 5 1 8922A Final Assembly SEE DETAIL II lt 8922A T amp B 6 10 8922 H3 R204 1 REF R206 REF R202 REF 2 REF MP8 REF DETAIL S201 REF ON A1 ASSY DETAIL I NOTES 3 6 and 9 POCKETS OF 9 PIN CONNECTORS NOT USED 2 WARNING INDICATES USAGE OF MOS DEVICE S WHICH MAY BE DAMAGED BY STATIC DISCHARGE CAUTION SUBJECT TO DAMAGE BY STATIC ELECTRICI
57. 13 4 9 89224 2222 baa 544 ns 4 15 4 10 Attenuator Lobe b RE Ue as mE ee Ge a d Gee arene 4 18 4 11 R204 Resistive Values mf 1 1 8W 4 19 4 12 R19 R34 R66 R76 Resistive Values mf 1 1 8W 4 19 iti 8922 List of Illustrations FIGURE TITLE Frontispiece 8922A True RMS Voltmeter sew 2 1 PT Connection Ge eden ee Ss 2 1 2 2 Controls Indicators and Connectors 2 2 2 3 Matched Impedance Measurement Techniques 2 5 2 4 Typical 8922A Crest Factor Limitation Below 10 Hz 2 6 2 5 Typical Relative dB Measurements 2 8 3 1 Overall Block 3 1 3 2 Detailed Block DISPram ucro Re mete e ttu 3 2 3 3 Sienal 3 3 3 4 RMS 3 4 3 5 A D Converter Simplified Schematic and Timing 3 6 3 6 Controller Timing A D Converter 3 7 3 7 Controller FUNCIONS eue dedecus ced etienne sS 3 8 3 8 Display and AnnunclatOrS usursa Ee SEE
58. 1388 CB1045 CMF552151F CMF553013F CB1055 309674 CMF554993F CMF554752F CB6835 8922A N TOT 0 E 4 5 5 REF REF REF REF REF REF REF REF REF 5 7 8922 R210 R212 R213 R214 R215 R216 R217 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R231 R232 R234 R235 R236 R237 R238 R239 R242 R243 R244 R245 R246 R247 5201 206 5207 5208 5208 1 5209 5210 1200 200 TP201 TP202 TP203 TP204 TP205 TP206 TP207 TP208 TP209 TP210 5 8 RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES VAR RES MIL RES MTL RES MIL RES MTL RES VAR RES MTL RES MTL RES VAR RES MTL RES COMP RES COMP RES MIL RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP RES COMP Table 5 2 A1 Main PCB Assembly cont DESCRIPTION 150 5 1 4W 22K 5 1 4W 10 5 1 4W 330 5 1 4W 10K 5 1 4W 6 8K 5 1 4W 22K 5 1 4W 1K 5 1 4W 10K 5 1 4W 5 1 4W 5 1 4W 10K 5 1 4W 10K 10 1 2W FILM 90 9K 1 1 8W FILM 953 1 1 8W FILM 909 1 1 8W FILM 8 66K 1 1 8W CER 2K 10 1 2W FILM 11 8K 0 25 F
59. 2 Hz Reading and ranging rates are slower Line fuse MDL 1 8A slo blo 5 x 20 mm 1 8A slow acting metric 2 3 8922 Table 2 1 Controls Indicators and Connectors cont NAME DIGITAL OUTPUT LOG ANALOG OUTPUT FUNCTION An output port reserved for use with the Logarithmic Output Option 004 521 Option or the 529 IEEE Interface Option see Section 6 for details COUNTER OUTPUT An output port reserved for use with the Counter Output Option 003 See Section 6 for details Linear Analog A pair of banana jacks for output accessing the dc linear analog output voltage This voltage is proportional to the V rms input and is linearly scaled 2V dc out equals a 2000 count readout The scale repeats for each range Input Power Connector 2 12 OPERATING NOTES 2 13 The following paragraphs describe various conditions which you should be aware of before attempting to operate the 8922A 2 14 Fuse Replacement 2 15 The Model 8922A is fuse protected from the power line You can access the fuse by pressing and turning CCW the fuse cap located on the rear panel When replacement is necessary use an MDL type 1 8 amp slo blo fuse for all voltage configurations For metric fuse use 1 8A slow acting 5 20 mm glass tube type 2 16 Display Indications 2 17 In addition to the standard digital readout we have equipped the front panel display with a series of unique visual indicators These includ
60. 223 27 30 32 35 44 42 41 524 01 22 21 34 35 40 54 20 R24 52 GI 24 27 45 1112 135 16 8922 1 7 4 PIO7 3 07 2 107 1 4100 2 SENSOR ACN 4100 1 OO5 OPT IN JI06 3 anD 4106 4 SENSOR DC OUT 8922A 1003 Sheet 1 of 2 Figure 8 3 A2 AC PCB Assembly cont 8922 iSV 2105 4 15 0 54 P 10 59 45 0 AMPLIFIER A AMPLIFIER B 855 55 14 4 i RA4 Rob RIIS SEL SEL 510 493K Ris RIS R20 R25 181 SEL 433K lt gt t c 7 2 R26 100 e QILA 11 5 N 2 100 aos 15 213 22 OUTPUT B RIIS 2 KAO qx __ 88 i To P102 5 gt T gt 5 9583 12 1 G A INPUT 2 INPUT R19 100 100 829 1 5 8 TL 5 EC B B e 10 INPUT INPUT P102 4 ue 15N PIO02 3 NOTES UNLESS OTHERWISE SPECIFIED G9 17 ARE SELECTED AS SET LL NON STANDARD PIN OUT EMITTER 125 a31 R46 ARE SELECTED AS SET A EVE amp BASE LEGS REVERSED VR3 R28 ARE SELECTED AS A SET gt TRANSISTOR SET 010 11 38 4 40 gt RESISTOR SET RIB 35 GS 19 14 NOLTAGES MEASDRED WITH 6922 INPUT SHORTED 1 VAC RANGE 15 ALL VOLTAGES MEASURED WITH HIGH MPEDANCE 100 VOLTMETER WITH IOK RESISTOR ISOLATING THE HIGH TEST PROBE VOLTAGES ARE TYPICAL MAY VARY tIOZ Z Figure 8 3 A2 AC PCB Assembly cont 8922A 1003 Sheet 2 of 2 K 2
61. 2V or 20 dB 1 V 1 dB at the output 0 dB corresponds to 200 uV and each range increase produces an additional 2V at the output Transients during range changes are eliminated by a sample and hold circuit 604 1 8922 1 SAME AS 003 REMOVE DOU OPTION 4 COVER PLATE USE SAME SCREWS TO INSTALL MP1 Figure 604 1 Logarithmic Analog Output Option Installation 604 2 8922 SAMPLE AND LOGARITHMIC INFORMATION OUTPUT DC INPUT FROM THERMAL SENSOR SCALING Figure 604 2 Logarithmic Analog Output Option Simplified Schematic 604 11 MAINTENANCE 3 Select the DC Volts function and 2 volt range on the DVM connect it to the LOGARITHMIC _ 604 12 The following maintenance information covers ANALOG OUTPUT jacks on the rear panel of the three areas performance testing calibration and UUT troubleshooting of the 004 Logarithmic Analog Output Option However before any of these procedures can be 4 Adjust the vernier control on the AC source ofa started the calibration of the mainframe instrument must voltage reading on the DVM of 1 400 002V dc be successfully completed The table of recommended test equipment in Section 4 lists all of the equipment necessary 5 Press the UUT dB VOLTS switch to the dB to calibrate the mainframe instrument No additional position then the REL dBm switch to the REL equipment is required to check calibrate and position The UUT display will be 0 00
62. 3 8922 Table 3 1 Signal Conditioner Gain Configuration INPUT ATTENUATOR Refer to the schematics in Section 8 The last column lists the component s FETs and relays that conduct to establish gain configuration of the circuits see the schematics for details on components 3 17 RMS Converter 3 18 The 8922 uses a thermal rms converter circuit which supplies a dc output voltage proportional to the rms value of the ac input The thermal sensor is a pair of resistor transistor elements thermally isolated from each INTERMEDIATE CONDUCTING ATTENUATOR COMPONENTS K1 O6 O28 O32 K1 029 032 Q57 K1 O6 Q29 O31 O57 K2 O5 Q29 2 Q57 K2 Q3 Q5 029 031 O57 K2 O4 O5 029 032 O57 K2 Q5 029 031 O57 other and the case see Figure 3 4 The ac input signal Vac from amp B produces a temperature change in the rms sensor s input resistor which is sensed by the associated transistor and causes a voltage change at the negative input of the integrator Feedback through the square root amplifier provides a dc voltage to the rms sensor s output resistor so that a similar temperature rise occurs in the output resistor The sensor gain is not constant with changes in input amplitude These changes in gain are compensated for by the square root amplifier to maintain a constant response time for level changes 15V 15V E E INPUT FROM AMP B FEEDBACK NETWOR
63. 3 through U207 23 Check 46 Is 1 at 0 045 10 47 52 2 48 Is voltage 2 at 0 045V 10 49 54 Check Amp B Refer to the AC Amplifier schematic for voltage check points 23 Replace rms sensor refer to RMS Sensor Replacement Procedure 1 Check U201A 23 Check Q3 O4 Q5 and Q6 refer to Table 4 10 are they switching properly 53 23 Check Amp A Refer to the AC Amplifier schematic for voltage check points 23 Check 1 Q32 Q33 23 4 16 8922 A D WAVEFORMS GENERAL CONDITIONS 8922A READING 1000 COUNTS SCOPE TRIGGERED ON SLOPE OF 2 PIN 38 X10 SCOPE PROBE 10 9 TP 203 INTEGRATOR OUTPUT 50ms DIV CM PIN 2 U205 200mV DIV PIN 8 U200 SCOPE PROBE WILL LOAD INPUT 0 2V DIV 50ms DIV PIN 37 INT U205 12 IV PIN 36 INT 50ms DIV PIN 38 AZ 0 2V DIV 50ms DIV NOTE All timing is 2 5 times slower when AC DC damping Function is selected Figure 4 8 A D Waveforms General Condition 4 17 8922 Table 4 10 Attenuator Logic States 0 0 0 1 0 1 0 1 1 0 0 I 1 0 1 0 0 0 1 0 0 0 1 0 0 0 LOGIC LEVELS 1 0V 0 15 4 46 When troubleshooting the UUT the following points should be kept in mind 1 Before any troubleshooting is begun make a visual inspection of the interior of the instrument 2 When troubleshootin
64. 4713 04713 12040 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 04713 89536 04713 89536 91637 91637 89536 91637 80031 91637 895 36 91637 01121 01121 01121 89536 91637 01121 01121 01121 895 36 01121 01121 01121 01121 376475 261578 261578 376475 376475 821 5 81 5 10 214250 MPSH81 MPSH10 MPSH81 MPSH10 MPSH81 MPSH81 MPS6520 MPS6522 MPS6520 MPS6522 MPS6560 MPS6562 376475 2N3904 507780 CMF651004F HFF1 9914F 327569 CMF559652F ET50W100 CMF601004F 325613 CMF559761D CB1535 CB1015 CB1535 459875 CMF5519R1D 1055 6255 CB2265 463133 CB5115 CB3915 CB8225 CB1035 REF TOT QTY 0 REF 2 1 REF REF REF 1 REF REE REF REF REF REF REF REF REF REF REF b 3 wh 3 gt 8922 Table 5 4 A2 AC PCB Assembly cont FLUKE MFG N MFG PART NO TOT REC 0 DESCRIPTION STOCK SPLY NO CODE OR TYPE 0 R25 RES MTL FILM 499K 1 1 8W 268813 91637 CMF554993F 3 R26 RES VAR CER 100K 10 1 2W 369520 89536 369520 2 R27 RES COMP 390 5 1 4W 147975 01121 CB3915 REF R28 ZENER RESISTOR SET R28 VR3 515197 89536 515197 1 1 R29 RES COMP 100 5 1 4W 147926 01121 CB1015 REF R30 RES COMP 100 5 1 4W 14792
65. 477448 89536 477448 i 1 1 Q4 XSTR FET JCT N CHANNEL 376475 89536 376475 2 95 XSTR FET N CHANNEL 376475 89536 376475 REF Q6 XSTR FET JCT N CHANNEL 376475 89536 376475 REF 08 XSTR SI PNP 453829 24355 AD821 2 1 99 DUAL FET RESISTOR SET 99 R17 476788 89536 476788 1 1 010 XSTR MATCHED SET 010 012 938 040 163133 89536 463133 1 1 1 011 XSTR SI PNP 454066 04713 MPSH81 10 2 012 XSTR MATCHED SET SEE 010 REF 1 013 XSTR SI NPN 333898 04713 MPSH10 7 1 014 XSTR SI NPN 333898 04713 MPSH10 REF Q15 XSTR SI PNP 225599 12040 2N4250 2 1 Q16 XSTR SI PNP 454066 04713 MPSH81 REF Q17 XSTR SI NPN 333898 04713 MPSH10 REF Q18 XSTR SI PNP 154066 04713 MPSH81 REF Q19 XSTR SI NPN 333898 04713 MPSH10 REF Q20 XSTR SI PNP 454066 04713 MPSH81 REF Q21 XSTR SI PNP 454066 04713 MPSH81 REF Q23 XSTR SI NPN 218081 04713 56520 lj 1 024 XSTR SI PNP 229898 014713 MPS6522 4 1 025 XSTR SI NPN 218081 04713 MPS6520 REF Q26 XSTR SI PNP 229898 08713 56522 REF 8922 028 029 931 932 933 936 937 938 939 940 Q41 042 043 044 045 047 048 049 050 051 R18 R19 R20 R21 R22 R23 5 14 Table 5 4 A2 AC PCB Assembly cont DESCRIPTION XSTR FET JCT N CHANNEL XSTR FET N CHANNEL XSTR FET N CHANNEL XSTR FET JCT N CHANNEL XSTR FET JCT N CHANNEL XSTR SI PNP DUAL FET RESISTOR SET 037 R46 XSTR MATCHED SET SEE Q10 XSTR SI PNP XSTR MATCHED SET SEE Q10 XSTR S
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67. 5 Sveta Jana TEL 385 41 837115 FAX 385 41 837237 Denmark Fluke Danmark A S Cust Supp Ejby Industrivej 40 DK 2600 Glostrup TEL 45 43 44 1900 or 1935 FAX 45 43 43 9192 Ecuador Proteco Coasin Cia Ltda Av 12 de Octubre 2449 y Orellana P O Box 17 03 228 A Quito TEL 593 2 230283 or 520005 FAX 593 2 561980 Egypt EEMCO Electronic Equipment Mkting Co 9 Hassan Mazher St P O Box 2009 St Heliopolis 11361 Cairo Egypt TEL 20 2 417 8296 FAX 20 2 417 8296 Fed Rep of Germany Fluke Deutschland Gmbh Customer Support Services Servicestutzpunkt VFN5 Oskar Messter Strasse 18 85737 Ismaning Munich TEL 49 89 9961 1260 FAX 49 89 9961 1270 Fluke Deutschland CSS Servicestutzpunkt VFN5 Meiendorfer Strasse 205 22145 Hamburg TEL 49 40 679 6434 FAX 49 40 679 7653 Finland Fluke Finland Oy Sinikalliontie 3 P L 151 SF 02631 Espoo TEL 358 0 6152 5600 FAX 358 0 6152 5630 France Fluke France S A 37 Rue Voltaire BP 112 93700 Drancy Cedex TEL 33 1 4896 6300 FAX 33 1 4896 6330 Greece Philips S A Hellenique Fluke Sales amp Service Manager 15 25th March Street P O Box 3153 177 78 Tavros Athens TEL 30 1 489 4911 or 4262 FAX 30 1 481 8594 Hong Kong Schmidt amp Co Ltd 1st Floor 323 Jaffe Road Wanchai TEL 852 9223 5623 FAX 852 834 1848 Hungary MTA MMSZ KFT Srv Gen Mgr Etele Ut 59 61 P O Box 58 H 1502 Budapest TEL 361 186 9589 or 209 3444
68. 515 CB2235 CB1035 CB3345 CB1035 CB62825 CB2235 CB1025 CB1035 CB1035 1025 1035 309674 559092 559530 559090 558661 309666 551182 551182 369520 CMF551103F CB8235 CB5125 CMF551003F 1515 1045 4755 1055 1055 CB4745 CB1045 453662 453670 453605 445197 XW1659 XW1659 458349 1 87022 0 1 87022 0 1 87022 0 1 81022 0 1 81022 0 1 87022 0 1 87022 0 1 87022 0 1 87022 0 1 87022 0 1 87022 0 TOT REC QTY REF REF REF REF REF 29 tz ca j REF 11 REF REF REF REF REF REF REF REF REF REF m 0200 0201 0202 0203 0204 0205 0206 0207 0209 0210 0211 VR201 VR202 VR203 VR204 W1 We W5 W6 W7 W10 W11 W201 XF 1 1 1 XR204 0200 XU205 IC IC IC 0 IC Q IC SEE IC Q IC 0 IC TG IC DIOD IC IC DIOD WIRE WIRE WIRE WIRE WIRE WIRE WIRE GROU Table 5 2 A1 Main PCB Assembly cont DESCRIPTION C MOS QUAD BI LATERAL SWITCH LIN OP AMP LIN 5 XSTR ARRAY 2 PNP 3 NPN C MOS HEX BUFFER C MOS QUAD 2 INPUT NAND GATE FINAL ASSEMBLY TABLE 5 1 LIN NPN XSTR ARRAY C MOS HEX BUFFER C MOS HEX INVERTER LIN LIN OP AMP E ZENER 6 4V LIN ADJ REG LIN VOL REG E ZENER FRONT PANEL FRONT PANEL FRONT PANEL FUSE FUSE ASSY ASSY ASSY ASSY ASSY ASSY ASSY ND
69. 540 Whitchall Electronics Corp Master Mobile Mounts Div Fort Meyers FL 97913 Industrial Electronic Hardware Corp NY 97945 Pennwalt Corp SS White Industrial Products Piscataway NJ 97966 CBS Electronic Div Danvers MA 98094 Machlett Laboratories Inc Santa Barbara CA 98159 Rubbcr Tcck Inc Gardena CA 98278 Malco A Microdot Co South Pasadena CA 98291 Sealectro Corp BICC Electronics Trumbill CT 98372 Royal Industrics Inc Now 62793 98388 Lear Siegler Inc Accurate Products Div San Dcigo 98978 International Electronic Research Corp Burbank CA 99120 Plastic Capacitors Inc Chicago IL 99217 Bell Industries Inc Elect Distributor Div Sunnyvale CA 99378 ATLEE of DE Inc N Andover MA 99392 Mepco Electra Inc Roxboro Div Roxboro NC 99515 Electron Products Inc Div of American Capacitors Duarte CA 99779 Bunker Ramo Eltra Corp Bamcs Div Lansdown PA 99800 Amcrican Precision Industries Delevan Div East Aurora NY 99942 Mcpco Centralab A North American Philips Co Milwaukce WI 7 11 12 USA California FLW Fluke Calibration Center C o FLW Service Corporation 3505 Cadillac Ave Bldg E Costa Mesa CA 92626 TEL 714 863 9031 FAX 714 751 0213 Fluke Service Center 42711 Lawrence Place Fremont CA 94538 TEL 510 651 5112 FAX 510 651 4962 Illinois Fluke Service Center 1150 W Euclid
70. 6 01121 1015 REF R31 RES MTL FILM 8 06 1 1 8W 294942 91637 CMF558061F 1 R33 RES COMP 33 5 1 4W 175034 01121 CB3305 4 R34 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 R35 RESISTOR SET SEE R18 REF R36 RES MTL FILM 619 1 1 8W 313072 91637 556190 R38 RES MTL FILM 619 1 1 8W 313072 91637 CMF556190F REF R39 RES COMP 33 5 1 4W 175034 01121 3305 REF R40 RES COMP 820 5 1 4W 148015 01121 8215 2 R41 RES COMP 22K 5 1 4W 148130 01121 CB2235 2 R42 RES COMP 160 5 1 4W 261859 01121 1615 2 R44 RES VAR CER 50 10 1 2W 447862 89569 447862 1 R45 RES MTL FILM 121 1 1 8W 343160 91637 CMF551210F 1 R46 RESISTOR DUAL FET SET SEE Q37 REF R47 RES COMP 300 5 1 4W 348276 01121 CB3015 4 R48 RES COMP 18 5 1 4W 219022 01121 CB1805 R49 RES COMP 18 5 1 4W 219022 01121 1805 REF R50 RES COMP 300 5 1 4W 348276 01121 CB3015 REF R51 RES MTL FILM 442 1 1 8W 474452 91637 CMF554420F 1 R52 RES MTL FILM 243 1 1 8W 512228 91637 CMF552430F 1 R53 RES MTL FILM 33 2 1 1 8W 296681 91637 CMF5533R2F 1 R54 RES COMP 1K 5 1 4W 148023 01121 CB1025 2 R55 RES MTL FILM 20 0 5 1 8W 494286 91637 CMF5519R1D REF R56 RESISTOR PAIR R56 amp R57 467662 89536 467662 1 1 R57 RESISTOR PAIR SEE R56 REF R58 RES COMP 1M 5 1 4W 182204 01121 CB1055 REF R59 RES COMP 1M 5 1 4W 182204 01121 CB1055 REF R60 RES COMP 1M 52
71. 6 to 5V at 0 14 mA Logic level low is 0 to 0 7V at 0 36 mA c Not Data Valid DV The external unit must accept data only when DV goes to a logic level low 0 to 1 0V from a logic level high 3 5 to 5V If the DMM is not autoranging and if the data is valid and new then DV will go low in the middle of each data nibble to indicate to the external unit that this nibble is valid and settled 6521 1 8922 19 36 1 18 SOURCE MNEMONIC EXT DESCRIPTION UNIT AV Not Address Valid Low indicates DMM is responding to a valid address Not Data Valid Low indicates that DMM data on the Y 2 lines is valid new and settled LSB DMM ADDRESS MSB NOT USED LSB BCD DMM data transmitted nibble serial MSB NOT USED Operating voltages for the interface side of the DMM Digital Interface PCB circuitry NOT USED Figure 6521 1 Interface Cable Pin Assignment Table 6521 1 DMM Data Format on the DMM Digital Interface dB Reference Table Range Table IMPEDANCE 200V 700V Not Used 6521 2 O abc DV JLMN MSD LSD OL UL Z1 8922A Table 6521 1 DMM Data Format on the DMM Digital Interface cont Binary bit Binary bit Binary data bit Binary range code If dB 1 If dB Not Data Valid If dB 0 If dB 1 lf K 1 Most Siginificant Digit SEQUENCE NO O P WH a MEANING J L M dB Reference S
72. 8 221879 190371 CODE 003 11590 12136 11590 11590 56289 56289 11590 56289 11590 56289 56289 56289 56289 56289 07910 07940 07910 07910 07910 07910 07910 73734 95712 89536 89536 89536 24859 89536 89536 89536 89536 89536 89536 89536 22526 89536 89536 89536 89536 91637 91637 89536 01121 01121 01121 01121 MFG PART OR TYPE OPTION CW30C2241K DM 15F431d CW30C2241K CW30C2241K 196D476X0020TE 023 101 502 CW30C2241K C023B101F 103M CW30C2241K 196D227X0010TEY 196 22 0010 196D475X0050PE4 196D475X0050PE4 CO28B02E301M 144448 144448 144448 144448 144448 144448 144448 23022 30355 1 320911 320911 320911 0 27 475491 475483 475376 475509 475400 456723 475384 65505 136 486670 454637 212231 212231 CMF551001F CMF551001F 369520 CB2035 9125 5105 1225 4 REF REF gt 5 8922 0 0 603 9 8922 Table 603 5 Counter Output Option PCB Assembly cont FLUKE MFG N DESCRIPTION STOCK SPLY NO 0 CODE E R409 RES COMP 15K 5 1 4W 148114 01121 1535 1 R410 RES COMP 220 5 1 4W 147959 01121 CB2215 1 R411 RES COMP 47 5 1 4W 147892 01121 CB4705 1 R412 RES COMP 680 5 1 4W 148007 01121 CB6815 2 R413 RES COMP
73. C COMMON 0101 10 0106 9 05 0205 71 0205 20 205 0 0205 29 6 oP LAST NO USED ERZO 050 ____ DP 56501 25307 05505 8920 1002 Figure 8 2 A1A1 Display PCB Assembly cont 8 5 8922 DETAIL R94 2 9 P Og NOTES gt INSTALLED IN FINAL ASSEMBLY 8922A 1603 Figure 8 3 A2 AC PCB Assembly 8 6 ET 2 454 103 5 15 105 4 PIOI 9 Cl CL 35 105 104 3 1104 2 1002004 101 0 1 10 101 4 v 1 mV PIOI 101 2 01 5 5 107 5 15 03 3 107 5 2wN 102 4 200wV 20 1004 107 1 7 20 2 200 PI02 6 AC DC 101 9 LO SOURCE 105 6 LO SENSE 105 7 SENSE P103 8 SOURCE P103 9 14 4V 103 2 103 1 2 4 NOTES UNLESS OTHERWISE SPECIFIED 2 5 ALL RESISTANCE VALUES IN OHMS 4 ALL CAPACITANCE VALUES IN MICROFARADS S gt RESISTOR PAIR R B 3 8100 RESISTOR PAWR 45049661 gt CAPACITOR PAIR C 55 CSS REPRESENTS AMPLIFIERS A amp SEE SH 7 FOR DETAILS 5 VOLTAGES MEASURED 3922A INPUT SHORTED RANGE 10 VOLTAGES ARE TYPICAL MAY VARY 2104 VOLTAGES PRESENT UNDER QUIESCENT CONDITIONS ARE OFFSET DEPENDENT li ANALOG COMMON LOGIC COMMON Notes CONTINUED ON sneer 2 LAST NO USED Q59 NOS NOT VSED Ci0 1 21 2
74. CRIPTION 3 1 3 5 Analog Circuitry 325 3 1 3 10 Digital CIF CU y u ace rasa eara dee uA AU 3 3 3 13 DETAILED BLOCK DIAGRAM DESCRIPTION 3 3 3 15 Sinal Conditioner uei 3 3 3 17 RMS Converter DUE Redde CO ee d gain 3 4 3 20 AD COnBnVeHGCE cu ops usb eres hU ED SE sass 3 5 3 24 z Dive e raus d od dot mene ee ee sae 3 5 3 41 Display and Annunciators 2 3 10 3 44 Power Supply ce en 3 10 continued on page ii 8922 TABLE OF CONTENTS continued SECTION 4 7A TITLE MAINTENANCE 4 1 INTRODUCTION 4 3 SERVICE INFORMATION 4 6 GENERAL MAINTENANCE 4 7 Access pe ue 4 9 INPUT POWER SELECTION 2355925932499 04290 ao motes ademas 4 11 xe uen etd dac a 4 13 Puse Replacement 246 rece p ash SO RUE EN ESTA 4 15 PERFORMANCE CHECK 4 18 Low and Midband Performance Check Volts Display Mode 4 20 dB Display Mode Check gt gas 4 22 DC Vow Level Check
75. Check A D Converter is it operating correctly Check TP200 is it at 6 4V Check the following for appropriate A D Converter waveforms U200 U202 U205 and TP203 Refer to Figure 4 8 Replace defective component Repeat Performance Tests and Calibration Check attenuator logic levels using Table 4 10 Are S1 and Q33 switching properly Check Amp A amp B Check Amp A amp B and attenuator network Remove is TP206 at 15V now 12 19 20 24 22 10 27 30 23 29 31 32 33 40 21 42 23 23 43 8922 8922 Table 4 9 8922 Troubleshooting Procedure cont STEP NO INSTRUCTION ves no GOTO Troubleshoot AC pcb assembly 23 Remove AC pcb is 208 15V 30 44 Check VR203 U200 U202 U205 U206 U209 U210 U211 U4 and U302 23 Check TP3 34 Is voltage at O 5V 10 35 45 Turn UUT off disconnect UUT from line power 36 CAUTION To avoid damage to the RMS sensor steps 37 and 38 must be performed with a multimeter whose output on the ohms function is no greater than 10 mA Is the resistance of U1 6 U1 7 or J106 2 to J106 3 90 ohms 8 Out of circuit resist 38 50 1 ance 100 ohms 253 Is the resistance of U1 8 to U1 9 J106 4 to J106 3 100 ohms 39 39 50 Check U2 U4 and U5 23 Check test point is it at 1V 5 41 51 Check meter and U210B 23 Check VR201 23 Check VR202 23 Check U20
76. Counter Output Option Troubleshooting cont MEASURE BETWEEN HIGH TERMINAL LOW TERMINAL T401 output and Chassis Ground U402 4 and Chassis Ground U402 9 and Chassis Ground J402 and Chassis Ground SCOPE DISPLAY 5V DIV 10 us DIV 5V DIV 10 Us DIV tL 2V DIV 10 us DIV 100 mV DIV 10 us DIV Input Common V see schematic at end of this manual Section 8 Chassis Ground see schematic at end of this manual Section 8 Press the 8922A dB VOLTS switch to the dB position then the REL dBm switch to the REL position The 8922A display will be 0 00 dB 6 Select the 20 volt range on the DVM 7 Use the decade switch on the ac source to increase the 8922A input to the levels indicated in Table 604 1 Nore the DVM and 8922A displays to be within the tolerances given 603 8 003 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C414 C415 C416 CR401 CR402 CR403 CRYOY 05 CR406 CR OT H1 J402 L401 L402 L403 L404 MP 1 MP2 MP3 MP4 MP5 MP6 MP7 P106 P401 0401 0402 9403 R402 R403 R404 R405 R406 R407 R408 Table 603 5 Counter Output Option PCB Assembly FLUKE MFG STOCK SPLY DESCRIPTION COUNTER OUTPUT OPTION FIGURE 603 4 892 4013 CAP CER 0 22 UF 20 50V CER 430 PF 5 500V CER 0 22 UF 20 50V CER 0 22 UF 20 50V CAP INSTALLED AT TEST LEV
77. DUCTION AND SPECIFICATIONS 1 1 1 1 INTRODUCTION Ree 1 1 1 9 SPECIEICATIONS 52353259439 os 1 2 OPERATING INSTRUCTIONS 2 1 2 1 IN FRO DUCTION cues oi etur a E Te 2 1 2 3 SHIPPING INFORMATION 2 1 2 6 E UN TENIS 2 1 2 8 INPUT POWER 3 UL Vue pP 2 1 2 10 CONTROLS AND INDICATORS 2 1 2 12 OPERATING NOTES dS wee 2 4 2 14 Pus Replacement 25405 2 4 2 16 Display Indications esses to hoe dE E ER 2 4 2 21 Measurement Connections 2 4 2 36 Input Signal Considerations desi 2 5 2 43 Selection aea arise 2 6 2 50 Voltage Display Mode 5455 ERES 2 6 2 53 dB Display 2 QI hee 2 7 2 56 dBm Measurements 2 7 2 61 Relative Measurements REL 2 7 2 68 Linear Analog Output 25 45 orae os tete i 2 8 2 70 OPERATION nOD Eier aud aeu bre 2 8 THEORY OF OPERATION 3 1 3 1 INTRODUCTION 21224 243255 thes tenes DU doe 3 1 3 3 OVERALL FUNCTIONAL DES
78. Div Chicago IL 11236 CTS Corp Resistor Products Div Beme IN 11237 CTS Corp of CA Electro Mechanical Div Paso Robles CA 11295 ECM Motor Co Schaumburg IL 11358 Columbia Broadcasting System CBS Electronic Div Newburyport MA 11403 Vacuum Can Co Best Coffee Maker Div Chicago IL 11502 can also use 35009 TRW Inc TRW Resistive Products Div Boone NC 11503 Keystone Columbia Inc Freemont IN 11532 Teledyne Relays Teledyne Industries Inc Hawthorne CA 11711 General Instrument Corp Rectifier Div Hicksville NY 11726 Qualidyne Corp Santa Clara CA 12014 Chicago Rivet amp Machine Co Naperville IL 12020 Ovenaire Div of Electronic Technologies Charlottesville VA 12038 Simco Div of Ransburg Corp Hatfield PA 12040 National Semiconductor Corp Danbury CT 7 3 12060 Diodes Inc Northridge CA 12136 PHC Industries Inc Formerly Philadelphia Handle Co Camden NJ 12300 AMF Canada 144 Potter Bramfield Guelph Ontario Canada 12323 Practical Automation Inc Shelton CT 12327 Freeway Corp Cleveland OH 12406 Elpac Electronics Inc Santa Ana CA 12443 Budd Co The Plastics Products Div Phoenixville PA 12581 Hitachi Metals Inemational Lid Hitachi Magna Lock Div Big Rapids MO 12615 US Temninals Inc Cincinnati OH 12617 Hamlin Inc LaKe Mills WI 12673 Wesco Electrical Greenfield MA 12697 Clarosta
79. E OR TYPE ary jary C62 CER 0 025 UF 20 100V 168435 56289 C0O23B101H253M 1 DIODE HI SPEED SWITCH 203323 07910 IN4448 9 2 CR2 DIODE HI SPEED SWITCH 203323 07910 IN4448 REF CR3 DIODE SI LO CAP LO LEAK 348177 07263 FD7223 2 1 CRH DIODE SI LO CAP LO LEAK 348177 07263 7223 CR5 DIODE HI SPEED SWITCH 203323 07910 IN4448 REF CR6 DIODE HI SPEED SWITCH 203323 07910 IN4448 REF DIODE HI SPEED SWITCH 203323 07910 IN4448 REF DIODE HI SPEED SWITCH 203323 07910 IN4448 REF CRY DIODE HI SPEED SWITCH 203323 07910 IN4448 REF CR10 DIODE HI SPEED SWITCH 203323 07910 IN4448 REF CR11 DIODE HI SPEED SWITCH 203323 07910 IN4448 REF J106 SOCKET SINGLE IN LINE H POST CONTACT 417311 30035 SS 109 1 04 1 1 COIL REED RELAY 446898 71707 1201384 2 REED SWITCH 284091 95348 MR138 2 2 COIL REED RELAY 446898 71707 U20134 REF REED SWITCH 284091 95348 MR138 REF MP183 SPACER XSTR MOUNTING 472969 13103 7717 30 1 187 POST CONTACT 379438 00779 9 87022 1 3 190 THERMAL EQUALIZER 489179 89536 489179 1 MP202 SHIELD AC 456830 89536 456830 1 P101 POST CONTACT 474742 22526 65500 109 3 P102 POST CONTACT 474742 22526 65500 109 103 POST CONTACT 474742 22526 65500 109 REF P104 CONNECTOR SOCKET 386144 00779 3 332070 4 1 P107 POST CONTACT 417329 22526 65500 104 1 01 XSTR SI NPN SELECTED 471565 89536 471565 2 1 3 02 XSTR SI NPN SELECTED 471565 89536 471565 REF 3 93 XSTR FET JCT N CHANNEL
80. EL IF REQUIRED CAP 47 UF 20 20V CER 0 005 UF 20 100V CAP CER 0 22 UF 20 50V CER 0 01 UF 20 100V CER 0 22 UF 20 50V 220 UF 20 10V CAP TA 220 UF 20 10V CER 4 7 UF 20 50V CER UF 20 50V CAP CER 300 PF 3 KV CAP INSTALLED AT TEST LEVEL IF REQUIRED DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH DIODE SI HI SPEED SWITCH SCREW FHP 4 40 X 1 4 SS NOT SHOWN CONNECTOR BNC FEMALE CHOKE 6 TURN CHOKE 6 TURN CHOKE 6 TURN INDUCTOR SHEILDED 0 27 UH SHIELD SHIELD SHIELD COVER COVER BRACKET SHIELD POST CONTACT CABLE ASSEMBLY 003 OPTION XSTR DUAL FET XSTR SI NPN XSTR SI NPN RES MTL FILM 1K 1 1 8W RES MTL FILM 1K 1 1 8W RES VAR 100K 102 1 2W RES COMP 20K 5 1 4W RES COMP 9 1 5 1 4W RES COMP 51 55 1 4W RES COMP 1 2K 5 1 4W NO ORDER 309849 177980 309849 309849 348516 175232 309849 149153 309849 474288 474288 363721 363721 485250 203323 203323 203323 203323 203323 203323 203323 256156 152033 320911 320911 320911 313031 475491 475483 475376 475509 475400 456723 475384 474809 486670 454637 272237 272237 168229 168229 369520 221624 19331
81. I NPN XSTR SI PNP XSTR SI PNP XSTR SI NPN XSTR SI PNP XSTR SI NPN XSTR SI PNP SI PNP XSTR SI NPN XSIR SI PNP XSTR SI NPN XSTR SI PNP XSTR SI NPN XSTR SI PNP XSTR FET JCT N CHANNEL XSTR SI NPN XSTR FET N CHANNEL RES MTL FILM 1M 1 1 2W RES PRECISION FILM 9 91M 12 1 2W RES VAR CER 5K 10 1 2W RES MTL FILM 96 5 1 1 8W RES VAR 10 20 1 2W RES MTL FILM 1M 1 1 4W RES VAR CER 500 10 1 2W RES MTL FILM 9 76 0 5 1 8W RES COMP 15K 5 1 4W RES COMP 100 5 1 4W RES COMP 15K 5 1 4W RES CERMET 9 09 1 1 4W RES MTL FILM 19 1 0 5 1 8W RES COMP 1M 52 1 4W RES COMP 6 2M 5 1 4W RES COMP 22M 5 1 4W RESISTOR DUAL FET SET SEE Q9 RESISTOR SET R18 R35 R65 R79 RESISTOR SEE FINAL ASSEMBLY TABLE 5 1 RES COMP 510 5 1 4W RES COMP 390 5 1 4W RES COMP 8 2K 5 1 4W RES COMP 10K 5 1 4W FLUKE STOCK NO 376475 261578 261578 376475 376475 453829 454066 333898 225599 454066 333898 454066 333898 454066 454066 218081 229898 218081 229898 330803 418707 376475 218396 507780 161075 460121 327569 474478 479311 474486 325613 474460 148114 147926 148114 459875 494286 182204 221960 221986 463182 218032 147975 160796 148106 MFG SPLY CODE 89536 89536 89536 89536 89536 24355 0
82. ILM 11 8K 0 25 1 8W 1 8W 1 2W 1 8W 100K 102 FILM 110K 1 82K 52 1 4W 100K 5 1 4W FILM 100K 1 CER 1 8W 150 5 1 4W 100 5 1 4W 5 1 4W 1M 5 1 4W 1M 5 1 4W 7 5 1 4W 100K 5 1 4W SWITCH SET SWITCH ROTARY SWITCH OFF ON BUTTON SWITCH GREEN SWITCH SLIDE SWITCH SLIDE POWER TRANSFORMER CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR CONNECTOR POST POST POST POST POST POST POST POST POST POST POST FLUKE STOCK NO 147934 148130 148106 192948 148106 148098 148130 148023 148106 148106 148023 148106 309674 223537 288555 312629 260364 309666 325688 325688 369520 234708 188458 193342 248807 147934 148189 220046 182204 182204 188441 148189 453662 453670 453605 445197 234278 234278 458349 379438 379438 379438 379438 379438 379438 379438 379438 379438 379438 379438 MFG SPLY CODE 01121 01121 01121 01121 01121 01121 01121 01 121 01121 01121 01121 01121 89536 91637 91637 91637 91637 89536 91637 91637 89536 91637 01121 01121 91637 01121 01121 01121 01121 01121 01121 01121 89536 89536 89536 89536 82 389 82389 89536 00779 00779 00779 00779 00779 00779 00779 00779 00779 00779 00779 MFG PART NO OR TYPE 81
83. Japan Fluke Corp Sumitomo Higashi Shinbashi Bldg 1 1 11 Hamamatsucho Minato ku Tokyo 105 TEL 81 3 3434 0188 or 0181 FAX 81 3 3434 01 70 Kenya Walterfang P O Box 14897 Nairobi Kenya TEL 254 2 FAX 254 2 Korea B amp P International Co Ltd Geopung Town A 303 203 1 Nonhyun Dong Kangnam Ku Seoul 135 010 TEL 82 12 546 1457 FAX 82 12 546 1458 IL MYOUNG INC Youngdong P O Box 1486 780 46 Yeogsam Dong Kangnam Ku Seoul TEL 82 2 552 8582 4 FAX 82 2 553 0388 Kuwait Yusuf A Alghanim amp Sons W L L P O Box 223 Safat Alghanim Industries Airport Road Shuwaikh 13003 Kuwait TEL 965 4842988 FAX 965 4847244 Malaysia CNN SDN BHD 17D 2nd Floor Lebuhraya Batu Lancang Taman Seri Damai 11600 Jelutong Penang TEL 60 4 657 9584 FAX 60 4 657 0835 Mexico Metro Y Calibraciones Ind S A Diagonal No 17 3 Piso Col Del Valle C P 03100 Mexico D F TEL 52 5 682 8040 FAX 52 5 687 8695 Netherlands Fluke Nederland B V CSS Afdeling Service Science Park Einhoven 5108 5692 EC Son TEL 31 40 2678300 or 2678311 FAX 31 40 2678321 1 96 New Zealand Phillips Scientific 4 Ind Pty L Private Bag 41904 St Lukes 2 Wagener Place Mt Albert Auckland 3 TEL 64 9 894 4160 FAX 64 9 849 7814 Nigeria Philips Projects Centre Resident Delegate PMB 80065 8 Kofo Abayomi Street Victoria Island Nigeria TEL 234 1 262 0632 FAX 234 1 262 0631 Norway Fluke
84. K X21 GAIN SQUARE ROOT FULL SCALE OUTPUT TO A D CONVERTER Figure 3 4 RMS Converter 3 4 3 19 The rms sensor is susceptible to damage from overvoltage inputs During an overload condition the protection circuit will clamp the output of Amplifier B to prevent damage to the sensor Overload conditions would result during turn on turn off or any time the rms value of the applied input exceeds the operating range of the sensor 3 20 A D Converter 3 21 A dual slope integration A D conversion technique is used in the Model 8922A This method applies the unknown voltage to a capacitor and allows the capacitor to charge for a specific time interval At the end of this interval the unknown voltage is removed the charge on the capacitor at this time will be proportional to the level of the unknown voltage Then a known voltage of opposite polarity is applied to the capacitor and clock pulses are counted while the capacitor discharges When the capacitor has reached its original charge point the number of clock pulses counted is a digital construct of the analog voltage input to the A D converter 3 22 For the following discussion refer to Figure 3 5 the A D Converter Simplified Schematic and Timing Diagram and Figure 3 6 Controller Timing A D Converter 3 23 At the beginning of the measurement cycle INT goes high and the dc output of the rms sensor is applied to the A D inte
85. L XSTR FET N CHANNEL XSTR FET GRP N CHANNEL RES COMP 100K 5 1 4W RES MTL FILM 2 15K 1 1 8W RES MTL FILM 301K 1 1 8W RES COMP 1M 5 1 4W SEE FINAL ASSEMBLLY TABLE 5 1 RES VAR CER 10K 10 1 2W RES MTL FILM 499K 1 1 8W RES MTL FILM 47 5K 1 1 8W RES COMP 68K 5 1 4W FLUKE MFG STOCK SPLY NO CODE 417311 30035 461095 00779 417329 22526 474213 22526 478693 22526 320911 89536 147819 72259 478685 32171 475392 89536 468868 89536 456749 89536 463224 89536 467696 89536 467704 89536 456780 89536 456731 89536 475681 89536 464404 89536 473546 89536 478156 89536 407502 89536 426759 89536 426759 89536 425900 89536 425900 89536 425900 89536 425900 89536 175125 07047 340026 89536 340026 89536 340026 89536 340026 89536 340026 89536 218396 04713 218396 04713 325753 03508 261578 89536 261578 89536 261578 89536 261578 89536 261388 89536 148189 01121 293712 91637 379156 91637 182204 01121 309674 89536 349191 91637 474585 91637 148171 01121 MFG PART OR TYPE 55 109 1 04 87406 1 65500 104 65500 1081 65500 110 320911 WEE1000 OMC DMA 001 CP2 475392 468868 456749 463224 467696 467704 456780 456731 475681 464404 473546 478156 407502 426759 426759 425900 425900 425900 425900 10172DAP 340026 340026 340026 340026 340026 2N3904 2N3904 D45C5 261578 261578 261578 261578 26
86. N3SSV 1VNIJ 335 902 SALON 8922A 1601 p E 6025 j gt 6020 1020 10 soenx MER 2834 1097 Xt Ons 14 3504 OL 1 42 ee ep OG uos 50542 Figure 5 2 1 Main PCB Assembly 1228 023 O 12 22 kr2d U 129 122 reir 5 10 A141 301 CR301 DS301 D5302 DS303 DS304 DS305 DS306 DS307 DS308 05309 05310 P301 Q301 R301 R302 R303 R304 R305 U301 U302 Table 5 3 A1A1 Display PCB Assembly FLUKE DESCRIPTION STOCK NO DISPLAY PCB ASSEMBLY 456921 FIGURE 5 3 8920A 4002T 1 UF 20 35V 161919 DIODE HI SPEED SWITCH 203323 DISPLAY LED 495457 DISPLAY LED 495440 DISPLAY LED 495440 DISPLAY LED 495440 DISPLAY LED 495440 DIODE LIGHT EMITTING 385898 DIODE LIGHT EMITTING 385898 DIODE LIGHT EMITTING 385898 DIODE LIGHT EMITTING 385898 DIODE LIGHT EMITTING 385898 CONNECTOR POST 376574 XSTR SI PNP 340026 RES COMP 150 5 1 4W 147934 RES COMP 2 7K 5 1 4W 170720 RES COMP 150 5 1 4W 147934 RES COMP 15K 5 1 4W 148114 RES COMP 150 52 1 4W 147934 RESISTOR NETWORK 461442 IC TTL LO POWER DECODER DRIVER 418632 MFG SPLY CODE 89536 56289 07910 29083 2848
87. NGE In the autorange mode the instrument appears as though it has a single range spanning 132 dB Transients will appear in the readout as the transition through which the analog voltage range points occur dB RANGE REFERENCES dBm REFERENCES Twelve manually selectable impedances with which to reference 0 dBm 1mW signal level Impedances 50 75 93 110 124 135 150 300 600 900 1000 and 1200 ohms RELATIVE dB REFERENCE A voltage present when this switch is depressed to its REL position is held as 0 dB reference for all other voltages dB RESOLUTION 0 01 dB 4 digits ACCURACY The accuracy specifications given below apply to the volts and dB display modes at 9 to 100 of full scale 23 C 5 C 90 day For 6 month specifications multiply all values by 1 5 8922A Voltmeter Specifications 23 C 5 C 90 Days INPUT AC ACCURACY OF VOLTAGE READING OR dB VOLTAGE 2Hz 10 Hz 20 Hz 50 Hz 10 kHz 200 kHz 1 MHz 2 MHz 11 MHz FILTER OUT 180 700V 700V 18 0 199 9V 200V 5 or Not Specified 0 5 dB n 5 7 or 0 1 dB 01548 3 180 1 999V amp or B 0 35 dB 18 0 199 9 200 mV Damping 0 15 dB 5 0 5 dB 2 5 1 80 19 99 Damping 2 0 25 0 5 dB 0 25 dB Damping 5 or 3 29 496 5 E 0 5 dB 0 35dB 0 25dB 0 4 dB
88. NJ 74306 Piezo Crystal Co Div of PPA Industries Inc Carlisle PA 74445 Holo Krome Elmwood 74542 Hoyt Elect Instr Works Inc Penacook NH 74840 IL Capacitor Inc Lincolnwood IL 74970 Johnson EF Co Waseca MN 75042 TRW Inc IRC Fixed Resistors Philadelphia PA 75297 Kester Solder Div Litton Systems Inc Des Plaines IL 75376 Kurz Kasch Inc Dayton CH 75378 CTS Knights Inc Sandwich IL 75382 Kulka Electric Corp Now 83330 Mount Vernon NY 75569 Performance Semiconductor Corp Sunnyvale CA 75915 Littelfuse Tracor Formerly Tracor Littelfuse Des Plaines IL 76854 Oak Switch Systems Inc Crystal Lake IL 77122 TRW Assemblies amp Fasteners Group Fastener Div Moutainside NJ T1342 AMF Inc Potter amp Brumfield Div Princeton IN 71542 Ray O Vac Corp Madison WI 77638 General Instrument Corp Rectifier Div Brooklyn NY 77900 Shakeproof Lock Washer Co Now 78189 77969 Rubbercraft Corp of 114 Torrance CA 78189 IL Tool Works Inc Shakeproof Div Elgin IL 78277 Sigma Instruments Inc South Braintree MA 78290 Struthers Dunn Inc Pitman NJ 78553 Eaton Corp Engineered Fastener Div Cleveland OH 7 9 78592 Stoeger Industries South Hackensack NJ 79497 Western Rubber Co Goshen IN 79727 C W Industries Southampton PA 79963 Zicrick Mfg Corp Mount Kisco NY 8C798 Ken Troni
89. O Adjust R224 for the same reading as the display 2 mV 6 Increase the input to 0 5V The voltage at the output should be the same as the front panel display 0 001V 4 11 8922 4 38 CALIBRATOR 5200A SHIELDED CABLE DVM 8600A Figure 4 6 Linear Analog Output Check AC Low Level Calibration and Filter Check 4 39 Use the following procedure to calibrate the UUT s AC low level performance Measure the 503 Attenuator Errors leveled generator 4 12 a Place all front panel switches out b Setupthetestequipment as shown in Figure 4 3 c Set the leveled generator to 50 kHz and connect the 874 20 dB GR attenuator input to the input of the UUT d Adjust the leveled generator amplitude until a steady reading of 1 000V is obtained on the display of the UUT e Switch the leveled generator to the X l setting observe that the UUT autoranges down to the 100 mV range and note the reading error f Switch the leveled generator to the X 01 setting and note that the reading error is less than _ 10 digits on the 20 mV range Calibrate the 2 mV range a Connect the 50 ohm terminated attenuator output to the input of the UUT b Switch the leveled generator to the and adjust the amplitude such that a steady reading of 10 00 mV is obtained on the UUT Switch the leveled generator to the 1 setting allowing the UUT to range down to the 2 mV range d
90. PTIONS 6 6 The location of a particular subsection is facilitated by the use of unique page and paragraph numbering which corresponds to the option or accessory in question For example a 600 X series identifies the general accessories subsection and a 604 X series identifies the subsection for the 004 Option where X is the individual page or paragraph number 600 1 RACK MOUNTING KITS 600 2 Kits are available that allow your DVM to be mounted either in a standard 19 inch equipment rack or panels with DIN size openings The Y2014 allows one instrument to be offset mounted on the right side in a 19 inch equipment rack Figure 600 1 The Y2015 allows RACK MOUNT FRONT PANEL 8922 Accessories two instruments to be mounted side by side in a 19 inch equipment rack Figure 600 2 The Y2020 allows one instrument to be panel mounted in a DIN size opening With the appropriate mounting kit installed you can easily remove your DVM for portable operation and easily mount the DVM back in the permanent installation Figure 600 1 2014 Offset Right Rack Mount 600 1 603 1 INTRODUCTION 603 2 The 003 Counter Output Option converts an rms input signal into an isolated 100 mV peak squarewave suitable for triggering a counter There are several advantages as opposed to using separate inputs for the DVM and the counter First the 8922A autoranged input has a much greater dynamic range than a counter This me
91. T THE FOLLOW 5 If TP208 does not comply recheck TP206 and ING POINTS ARE AT LINE POTENTIAL adjust R229 if necessary 1 POWER LINE CONNECTOR 2 ALL LAND PATTERNS NEAR POWER 6 Check TP207 for 5V 0 25V TRANSFORMER 3 POWER SWITCH 4 34 Low and Midband Accuracy Adjustment 4 FUSE HOLDER 4 35 Use the following procedure to calibrate the low 4 33 Use the following procedure to calibrate the and midband accuracy of the UUT power supplies of the UUT 1 Place all the front panel switches in the out L Place all front panel switches to the out position position CAUTION 2 Short TP204 to TP209 to light the 4th display digit Certain overload protection depends on the supply voltages To avoid possibility of 3 Apply the input voltages and frequencies as damage DO NOT adjust the 15V supplies listed in Table 4 7 and adjust to the limits given If with the UUT in overrange any limit cannot be reached see Troubleshooting Table 4 7 Low and Midband Accuracy Adjustments 1 READ LIMIT TEP ADJUST Note reading Select RANGE HOLD 0 1 2 1 10 of reading 3 digits in step 3 Return to step 1 if R101 was readjusted Select AUTORANGE 2 5V 20V AC DC n a 10 digits 0 25 Vdc 2V AC DC n a 10 digits Return to step 2 if R26 was readjusted 100 mV 200 mV 500 5 digits 1 9 mV 2 500 40 digits Return to step 4 if R44 was readjusted 5 digits 4 10 8922 Table 4 7 Low Midb
92. TY Figure 5 1 8922A Final Assembly cont 8922 Al 1 C200 C201 C202 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 CRI CR200 CR201 CR202 CR203 CR204 CR205 CR206 CR207 CR208 CR209 1 200 H201 H202 H203 H204 H205 H206 41 42 46 4101 4102 J 103 5 6 Table 5 2 1 Main PCB Assembly DESCRIPTION MAIN PCB ASSEMBLY FIGURE 5 2 8922A 4001 40013 DISPLAY PCB ASSEMBLY PLYPRP 0 47 UF 10 100V CAP 0 47 UF 20 35V CAP MICA 150 PF 5 500V MYLAR 0 87 UF 10 100V CAP CER 10 000 PF 20 100V CER 10 000 PF 20 100V CAP MICA 180 PF 5 500V CAP MICA 3000 PF 5 500V CAP ELECT 220 UF 10 152 35V CAP ELECT 220 UF 10 75 35V CAP ELECT 220 UF 10 75 35V CAP ELECT 4700 UF 10 100 15V CAP CER 10 000 PF 20 100V CAP CER 10 000 PF 20 100V CAP MATCHED PAIR W C215 CAP PART OF MATCHED PAIR TO C214 MYLAR 0 220 202 50V CAP MICA 1000 PF 5 500V CAP CER 100 PF 10 1K RECTIFIER BRIDGE 50V 25A DIODE MULTI PELLET CAP DIODE HI SPEED SWITCH DIODE HI SPEED SWITCH DIODE HI SPEED SWITCH RECTIFIER BRIDGE RECTIFIER BRIDGE DIODE HI SPEED SWITCH DIODE HI SPEED SWITCH DIODE SI MULTI PELLET DIODE HI SPEED SWITCH FUSE SLO BLO 1 8 AMP METRIC SLO ACT 5 X 20 MM GLASS TUBE SCREW RHP 4 40 X 1 4 LOCK
93. UTO ZERO OR AZ4 Figure 3 6 Controller Timing A D Converter Table 3 2 Controller Summary INPUT PIN PIN DESCRIPTION OUTPUT Input Vss 5V supply CM CL i CLs RG Input Compare signal from A D Converter Input External Oscillator input Input 400 kHz crystal input for internal oscillator Negative going pulse in the middle of each strobe Insures strobed data for DOU is valid Eight strobes that indicate which LED is to be enabled and accept the data on lines W X Y and Z Output Output Input Impedance reference selection line in dB Output Encoded range lines Fo MSB Fo LSB code equals range 1 voltage swings from 15 to OV Input Strobe input on this pin determines the lower range limit Input Strobe input on this pin determines the upper range limit Output Enables display decimal point Input Ground OV supply 3 7 8922 Table 3 2 Controller Summary cont INPUT OUTPUT PIN PIN DESCRIPTION Output Input J Input T4 DE R Output R Output VOLTS NON LINEAR dB O O RM MAIN 120022 COUNTER INT INT AZ A D DATA CONTROL LATCHES DE R REFERENCE LATCHES REFERENCE IMPEDANCE DATA Indicates new data is ready for DOU occurs after CM one strobe raster long Input E
94. WASHER FLAT 4 NUT 4 40 SCREW 6 32 X 5 8 NUT LOCKING HEX 6 32 LOCKWASHER SPLIT 5 NUT HEX CONNECTOR BANANA JACK BLACK CONNECTOR BANANA JACK RED CONNECTOR FEMALE BNC 8920A ONLY SOCKET IN LINE SOCKET IN LINE SOCKET IN LINE FLUKE STOCK NO ORDER ORDER 446807 161349 148478 369124 149153 149153 148460 161786 460279 460279 460279 460261 149153 149153 512210 190314 148387 105593 473520 375477 203323 203323 203323 296509 296509 203323 203323 375485 203323 BY 166488 467233 256156 110395 184044 152181 152819 111328 110635 162073 162065 414201 436774 436774 436774 MFG SPLY CODE ONLY ONLY 89536 56289 72136 73445 56289 56289 12136 12136 89536 89536 89536 80031 56289 56289 89536 11590 12136 11590 21845 09214 07910 07910 07910 21845 21845 07910 07910 09214 07910 ONLY 71400 89536 73734 73734 73734 73734 78199 89536 89536 78970 78970 02660 60065 60065 60065 MFG PART NO OR TYPE REPLACEABLE PARTS REPLACEABLE PARTS 446807 196D474X0035HA1 DMF15151J C280MAH H7TOK 023 10 103 023 10 103 DM15F 181d DMF 19302J 460279 460279 460279 3143TS502V015 CO23B10F103M C023B10F 103M 512210 CW30C22HK 19 1027 101 JTT5 OLP MPD200 114448 144448 144448 F903C 22 F903C 22 144448 144448 MPD300 114448 APPROPRIATE SOURCE MDL1 8 467233
95. Y OUTPUT IMPEDANCE OPTION 521 DMM DIGITAL INTERFACE DESCRIPTION OPTICAL ISOLATION OPERATING POWER OPTION 529 DMM IEEE 488 INTERFACE DESCRIPTION FUNCTION IEEE REPERTOIRE 1 6 100 mV peak square wave 50 ohms Maintains instrument isolation with respect to earth ground 200 rms input 0 dB OV dc out 700V rms input 131 dB 13 1V out i e 100 mV 1 dB Non isolated output common is the same as input common Within each range 0 35 dB Over all seven ranges 2 dB 1 Serial BCD output of all digits and annunciators Transfer reliable up to 500V ac rms common mode from dc to 440 Hz From DMM 5 and GND From external device 5V at less than 10 mA and GND Option for interfacing the 8922A to IEEE 488 1978 Package consists of one pcb mounted in the 8922A one pcb mounted in the 1120A Translator and one interconnect cable The 1120A must be used to interface to the IEEE 488 General Purpose Bus Talker SH1 1 A Message From Fluke Corporation zx static awareness Some semiconductors and custom IC s can be damaged by electrostatic discharge during handling This notice explains how you can minimize the chances of destroying such devices by 1 Knowing that there is a problem 2 Leaning the guidelines for handling them 3 Using the procedures packaging and bench techniques that are recommended The following practices should
96. able for use with the 8922A The options and accessories are listed and described in Table 1 1 They may be ordered for factory or field installation Detailed information concerning each option and accessory is given is Section 6 of this manual Table 1 1 8922A Options and Accessories MODEL NO DESCRIPTION OPTIONS 8922 003 8922A 004 8922A 521 8922A 529 Counter Output Logarithmic Analog Output DMM Digital Interface 488 Interface ACCESSORIES Rack Mounting Kit single unit Rack Mounting Kit double unit Panel Mount DIN 5126 1 1 8922 1 8 The PTI Portable Test Instrument case 15 family of injection molded plastic instrument packages of various sizes which may be stacked vertically and latched together to form portable test stations When instruments are stacked the weight of the stack should be limited to 40 pounds total and the instrument drawing the most power should be on the top Stacked nstruments have a horizontal air space between them to reduce heat conduction between instruments 1 9 SPECIFICATIONS 1 10 Detailed specifications for the Model 8922A True RMS Voltmeter are given Table 1 2 Specifications for the Model 8922A options are given in Table 1 3 Table 1 2 Specifications ELECTRICAL Basic The electrical specifications given assume an operating temperature of 23 C 5 C relative humidity up to 80 and a minimum 90 da
97. ach listed part is shown in an accompanying illustration 5 3 Parts lists include the following information 1 Reference Designation 2 Description of each part 3 FLUKE Stock Number 4 Federal Supply Code for Manufacturers See Section 7 for Code to Name list 5 Manufacturer s Part Number 6 Total Quantity per assembly or component 7 Recommended Quantity This entry indicates the recommended number of spare parts necessary to support one to five instruments for a period of two years This list presumes an availability of common electronic parts at the maintenance site For maintenance for one year or more at an isolated site it is recommended that at least one of each assembly in the instrument be stocked Inthe case of optional subassemblies plug ins etc that not always part of the instrument or are deviations 5 2 from the basic instrument model the REC QTY column lists the recommended quantity of the item in that particular assembly 5 4 HOW TO OBTAIN PARTS 5 5 Components may be ordered directly from the manufacturer by using the manufacturer s part number or from the John Fluke Mfg Co Inc factory or authorized representative by using the FLUKE STOCK NUMBER In the event the part you order has been replaced by a new or improved part the replacement will be accompanied by an explanatory note and installation instructions if necessary 5 6 To ensure prompt and efficient handling o
98. and Accuracy Adjustments cont STEP ADJHIST of READING 1 2V 500 R3 1 0000 5 digits 1 2 500 224 Meter Mid scale 100 200V 500 R7 100 00 5 digits 1 2V 50K C5 1 0000 5 digits 100 200V 50K 8 100 00 10 digits Return to step 10 if C8 was readjusted 10 mV 20 mV 500 Chk 10 000 20 digits 10 mV 20 mV 10K Chk 10 000 20 digits 10 mV 20 mV 50K Chk 10 000 20 digits 10 20V 500 Chk 10 000 5 digits 10 20V 10K Chk 10 000 20 digits 10 20V 50K Chk 10 000 5 digits Remove the short between TP204 and TP209 Autorange into the 20 mV range and push RANGE HOLD Apply 22 0 mV at 500 Hz to the input of the UUT Increase the input voltage in 1 mV steps until the UNCAL annunciator lights Verify that this occurs with an input voltage between 22 5 and 23 5 mV If the reading is outside these limits refer to the RMS Protection Circuit Calibration 4 Observe that the null peak meter reads center of scale 4 division 4 36 Linear Analog Output 4 37 Use the following procedure to calibrate the 8922A linear analog output 5 Push RANGE HOLD and decrease the input to 0 1V 500 Hz The output voltage should read the same as the front panel display 2 0 2mV If it is not within this limit adjust R234 and go back to step 3 1 Setup the calibration test equipment as shown in Figure 4 6 2 Select AC and AUTORANGE 3 Apply 1 000V 500 Hz to the input and monitor the dc voltage at the rear panel linear analog output LA
99. and troubleshooting are given later in this section of this manual NOTE In all of the procedures in this section precautions should be taken to minimize ground currents stray fields etc 4 18 Low and Midband Performance Check Volts Display Mode 4 19 This procedure will verify that the UUT s low and midband performance is within the limits specified in Section 1 Set up the test equipment as shown in Figure 4 1 and select the required function and input signal as indicated in Table 4 3 Note any deviation between the UUT performance and the specified limits 8922A REAR DVM 8600A 8922A FRONT NOTE WHEN TESTING THE 8922A A BANANA TO BNC ADAPTER MUST BE USED POMONA 1296 Figure 4 1 Low and Midband Performance Test Set Up 8922 Table 4 3 Low and Midband Performance Checks Volts Display Mode FUNCTION MODE DISPLAY RANGE AC AUTORANGE AC AUTORANGE AC AUTORANGE AC HOLD AC HOLD AC HOLD AC HOLD AC AUTORANGE 1V 10V AC AUTORANGE 100V AC AUTORANGE AC AUTORANGE 10 mV AC AUTORANGE 100 mV AC AUTORANGE 1V AC AUTORANGE AC AUTORANGE AC AUTORANGE AC AUTORANGE 4 4 LIMITS or COMMENTS COUNTS 38 Note that the mV annunciator is lit 10 Note that the mV annunciator is lit 5 Note that the mV
100. ans that input sensitivity is increased to 180 while on the other hand DVM inputs as large as 700V rms will not overload the counter In practice inputs should be 1 8 mV or greater due to possible false triggering effects of noise riding on lower level inputs Secondly because the counter output 15 isolated the diode isolation from earth ground is not defeated if the counter low input is earth ground Third only one probe is needed to make simultaneous voltage and frequency measurements 603 3 SPECIFICATIONS 603 4 Specifications for the Counter Output Option given in Section 1 of this manual 603 5 INSTALLATION 603 6 Use the following procedure to install the Counter Output Option Refer to Figure 603 1 for illustration 1 Remove 8922A top cover see Access Information 2 Plug Counter Output Option into J106 1 J106 3 of the 2 AC PCB Assembly and mechanically 8922A 003 Option Counter Output secure with the three screws provided one on the AC Assy shield and two on the rear panel 3 Connect the 3 wire cable P401 to J401 on the Al PCB Assembly 4 Verify operation using the calibration procedure 5 Replace the shields 603 7 OPERATION 603 8 Once installed the Counter Output Option requires no operator attention other than ensuring that no voltage is ever applied to the option s rear panel BNC output J102 603 9 THEORY OF OPERATION 603 10 As shown in Figure 603
101. are defeated a shock hazard will exist at the low input connector when the low input lead is floated above 30 volts 2 30 IMPEDANCE MATCHING 2 31 Two types of ac voltage measurements are typically made those involving matched impedance systems and those where voltmeter loading is minimized high impedance measurements and no impedance matching occurs 2 32 When matched impedance systems are measured the input cable should be terminated as close as possible to the 8922A input thereby minimizing input capacitance and enhancing accuracy at high frequencies This is accomplished by including the meter as an integral part of the circuit as shown in Figure 2 3A Notice that the integrity of the 500 system is maintained by using a 500 broadband matching power splitter An alternate solution is shown in Figure 2 3B In this case the source is alternately connected to the 8922A and the test circuit This allows the source to be adjusted to a known level before being connected to the test circuit Since both the meter and the test circuit are 500 loads the circuit integrity is maintained In either method the accuracy will be determined in part by the accuracy of the source impedance and the accuracy of the termination 2 33 High impedance measurements are based on the assumption that the voltmeter s fixed 10 MQ input resistance and low input capacitance will not appreciably load or otherwise affect the circuit being mea
102. asonic Secaucus NJ 54492 Cinch Clamp Co Inc Santa Rosa CA 54583 TDK Garden City NY 54590 RCA Corp Distribution amp Special Products Cherry Hill NY 54869 Piher Intemational Corp Arlington Heights IL 54937 DeYoung Mfg Bellevue WA 54590 RCA Corp Electronic Components Div Cherry Hill NJ 55026 American Gage amp Machine Co Simpson Electric Co Div Elgin IL 55112 Plessey Capacitors Inc Now 60935 55261 LSI Computer Systems Inc Melville NY 55285 Bercquist Minneapolis MN 55322 Samtech Inc New Albany IN 55408 STI CO Industries Buffalo NY 55464 Central Semiconductor Corp Hauppauge NY 55557 Microwave Diode Corp W Stewarstown NH 5566 RA F Electronic Hardware Inc Seymour CT 55576 Synertek Santa Clara 55680 Nichicon America Corp Schaumburg IL 55943 DJ Associates Inc Replaced Transcon Mfg 24618 Fort Smith AZ 6282 Utek Systems Inc Olathe KS 56289 Sprague Electric Co North Adams MA 56365 Square D Co Corporate Offices Palatine IL 56375 WESCORP Div Dal Industries Inc Mountain View CA 7 7 56481 Shugart Associates Sub of Xerox Corp Sunnyvale CA 56637 RCD Components Inc Manchester NH 56708 Zilog Inc Campbell CA 56856 Vamistor Corp of TN Sevierville TN 56880 Magnetics Inc Balumore MD 7026 Endicott Coil Co Inc Binghamton NY 57053 Gates Energy Pro
103. be followed to minimize damage to S S static sensitive devices 3 DISCHARGE PERSONAL STATIC BEFORE HANDLING DEVICES USE A HIGH RESIS 1 MINIMIZE HANDLING TANCE GROUNDING WRIST STRAP 2 KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE 4 HANDLE S S DEVICES BY THE BODY 5 USE STATIC SHIELDING CONTAINERS FOR 8 WHEN REMOVING PLUG IN ASSEMBLIES HANDLING AND TRANSPORT HANDLE ONLY BY NON CONDUCTIVE EDGES AND NEVER TOUCH OPEN EDGE CONNECTOR EXCEPT AT STATIC FREE WORK STATION PLACING SHORTING STRIPS ON EDGE CONNECTOR HELPS PROTECT INSTALLED S S DEVICES 6 DO NOT SLIDE S DEVICES OVER ANY SURFACE C 9 HANDLE S S DEVICES ONLY AT A STATIC FREE WORK STATION _ 10 ONLY ANTI STATIC TYPE SOLDER SUCKERS SHOULD BE USED 11 ONLY GROUNDED TIP SOLDERING IRONS SHOULD BE USED 7 AVOID PLASTIC VINYL AND STYROFOAM IN WORK AREA PORTIONS REPRINTED WITH PERMISSION FROM TEKTRONIX INC AND GENERAL DYNAMICS POMONA DIV amp Dow Chemical 9 93 2 1 INTRODUCTION 2 2 The information we have presented in this section is intended to familiarize you with the capabilities and limitations of the Model 8922A We have included instructions for the installation and operation of your 8922A as well as a brief description and identification of each control and indicator on the instrument 2 3 SHIPPING INFORMATION 2 4 The Model 8922A is packaged and shipped in a protective container When you recei
104. bled the instrument may range through seven voltage ranges from 2 mV to 700V rms Autoranging also applies in the dB modes but gives the effect of a single range spanning 132 dB By coding the logic levels on the three lines F0 F1 and F2 the controller selects a range see Table 3 3 Output Range Codes by setting up the circuit conditions of the input and intermediate attenuators and amplifier A that are necessary for signal conditioning in that range See Table 3 1 Signal Conditioner Gain Configuration If the controller senses that the input is above or below the selected range see Table 3 4 Over Underload Conditions it shifts up or down one range depending upon the direction sensed and halves its cycle time The controller blanks the display and determines whether the input to the instrument is now in range or if a further change in range is necessary When the proper range is found display blanking is removed and the cycle time returns to normal Use of the HOLD RANGE control will command the Controller to remain at the present range see Table 3 5 Input Range Codes via command input line D E and F A signal from the STEP UP RANGE control will increment the instrument one range 3 28 COMPUTATIONS 3 29 The controller is able to count compute in two modes linear or non linear The following paragraphs will explain how the controller obtains its linear volts or non linear dB readings 3 30 Voltage Computations
105. by the addition of the appropriate constant which may be calculated from the following equation 20 log V 1 2 20 log V0 001R 20 Where N number of ranges above or below the 20V range i e 2 mV range N X4 Table 3 5 Input Range Codes COMMAND LINES 8922A CONTROLLER FUNCTION Auto range fast range cycle Hold present range overridden by a amp p Range up at CM time over ridden a amp 8922A 3 32 dB Computations 3 33 If the dB VOLTS switch is in the dB position a non linear count of the clock pulses is enabled The binary rate multiplier RM passes only a fraction of the clock pulses on to the controller s main counter see the illustrated input to the main counter on Figure 3 7 This count approximates the logarithmic curve of the dB scale and like the VOLTS mode is stored in the data latches 3 34 dBm Reference 3 35 Don tlet the m confuse you it simply means that the power level as measured in dB Computations is referenced to 1 mW In other words when the instrument reads 0 dB the system being measured will be dissipating 1 mW of power The following will explain how the controller obtains a measurement of power referenced to 1 mW dBm 3 36 In order for the controller to obtain a measurement in dBm the appropriate reference impedance must be used A 1200 ohm reference impedance is assumed by the RM Therefore if any other reference is desired an appropriate constant
106. ce test be completed as a check 1 Remove the 8922A s top cover and set up the test equipment as shown in Figure 604 3 2 Set the 8922A at AC AUTO Now apply 1 0 mV 500 Hz Observe the option s output to be approximately 1 4 0 2V dc TP504 is Ground TP503 is the option s output 3 Apply 20 0 mV 500 Hz to the UUT and select 115 HOLD RANGE Monitor the voltage TP502 and adjust R501 for a 0 0 0005 dc on the DVM 4 Monitor TP501 and note the magnitude and polarity of the offset from to the nearest 0 01V 5 While still monitoring TP501 adjust R512 fora reading of 10V OFFSET of step 3 0 01V Example Initial Offset Final Reading 03 10 03 10 03 01V 14V 10 14 9 86 01V SHIELDED AC CALIBRATOR 5200A BANANA TO BNC ADAPTER NOTE THE OUTPUT IS ON THE RIGHT WHEN THE 8920A IS VIEWED FROM THE REAR 6 Monitor TP503 and note the offset from 6 00V to the nearest 0 01V 7 Decrease the input to 100 mV 500 Hz and observe that the DMM reads 5 4V 0 01V plus the offset noted in step 5 8 Decrease the input to 20 mV 500 Hz and observe that the DMM reads 4 00V 0 01V plus the offset noted in step 5 604 17 TROUBLESHOOTING 604 18 To troubleshoot the 004 Option read the theory of operation for this option and then check the actual voltage levels against those indicated on the 004 schematic located in Section 8 If there are any descrepancies simpl
107. citance between the source and the 8922A input connector 2 24 SAFETY CONSIDERATIONS 2 25 Under normal operating conditions the 8922A will not present a potential electrical shock hazard to the operator However careless use of input lead connectors and or adapters may create a shock hazard 2 26 Thelow input on the 8922A is connected to power ground through a pair of diodes see front panel connector These diodes allow the low input terminal to float up to 400 mV rms Their function is twofold they provide isolation between input low and power ground and they protect the operator from the possibility of hazardous voltages existing on the exposed low input connector 2 27 At first glance 400 mV of isolation does not appear significant However in most cases it provides enough isolation to prevent ground loop currents and therefore measurement errors due to ground loops 2 28 When you connect the low input of the 8922A toa potential greater than 400 mV above power ground the diode pair conducts and effectively clamps the input common mode voltage WARNING TO AVOID ELECTRICAL SHOCK HAZARD DO NOT REMOVE OR OTHERWISE DEFEAT THE INPUT DIODE PAIR 2 29 Under no circumstances should you attempt to defeat the function of the diodes Specifically the diodes should not be removed the ground return on the power cord should not be floated and an isolation transformer should not be used to power the 8922A If the diodes
108. cs Inc Milan IL 80528 Baumgartens Atlanta 8F330 Eaton Corp Cutler Hammer Product Sales Office Mountain View CA 8 100 Tellabs Inc Naperville IL 80009 Tektronix Beaverton OR 80031 Mepco Electra Inc Morristown NJ 80032 Ford Aerospace amp Communications Corp Western Development Laboratories Div Palo Alto CA 80145 LFE Corp Process Control Div Clinton OH 80183 Sprague Products Now 56289 80294 Boums Instrumants Inc Riverside 80583 Hammerlund Mfg Co Inc Paramus NJ 80640 Computer Products Inc Stevens Amold Div South Boston MA 1073 Grayhill Inc La Grange IL 81312 Litton Systems Inc Winchester Electronics Div Watertown CT Federal Supply Codes for Manufacturers cont 81439 Therm O Disc Inc Mansfield OH 81483 International Rectifier Corp Los Angeles CA 81590 Korry Electronics Inc Scattle WA 81741 Chicago Lock Co Chicago IL 82227 Airpax Corp Cheshire Div Cheshire CT 82240 Simmons Fastner Corp Albany NY 82305 Palmer Electronics Corp South Gate CA 2389 Switchcraft Inc Sub of Raytheon Co Chicago IL 82415 Airpax Corp Frederick Div Frederick MD 82872 Roanwell Corp New York NY 82877 Rotron Inc Custom Div Woodstock NY 82879 IIT Royal Electric Div Pawtucket RI 83003 Varo Inc Garland TX 83014 Hartwell Corp Placentia CA 83055 Signalite Fuse Co Now
109. d test equipment in Section 4 lists all of the equipment necessary to calibrate adjust and troubleshoot the mainframe instrument Any additional equipment required to check and calibrate the 003 Option is listed in Table 603 1 If you are unable to obtain the recommended test equipment insure that the substitute has equal or better performance specifications NOTE For the following procedures the 8922A will be referred to as the UUT Unit Under Test Table 603 1 Recommended Test Equipment RECOMMENDED EQUIPMENT EQUIPMENT REQUIREMENT NOMENCLATURE Universal 100 2 20 MHz Counter Timer Fluke 1953A DC to 200 MHz Tektronix 475 1 8 ns Oscilloscope 603 14 The following procedure will verify that the Counter Output Option is operating within the specification limits stated in Section 1 1 Connect the AC calibrator UUT oscilloscope and termination as shown in Figure 603 3 2 Set the AC calibrator to its 10V range set the UUT to AC FUNCTION VOLTS DISPLAY MODE and 2V range HOLD and set the oscilloscope s time base to 0 2 sec div and Vert on 50 mV div 3 Referring the Table 603 2 change input to UUT as indicated and note that display values are within indicated tolerances 4 Disassemble the setup as shown in Figure 603 3 and connect the SG503 UUT and Universal Counter Timer and terminations as shown in Figure 603 4 5 Set the SG503 to its 10 25 MHz range set the Universal Counter
110. dB troubleshoot the 004 Option 6 Select the 20 volt range on the DVM 7 Use the decade switch on the ac source to increase the 8922A input to the levels indicated in Table 604 1 Note the DVM and 8922A display to be within the tolerances given NOTE For the following procedures the 8922A will be referred to as the UUT Unit Under Test Table 604 1 Performance Test 604 13 PERFORMANCE TEST 8922A INPUT 8922A DISPLAY DVM DISPLAY 604 14 The following procedure will verify that the 10 mV 500 Hz 20 00 50 25 dB 3 4 0 24V Logarithmic Analog Output Option is operating within 100 mV 500 Hz 40 00 0 25 dB 5 4 40 24V the specification limits stated in Section 1 1V 500 Hz 60 00 0 25 dB 7 4 50 24 1 Select the AC function LO RANGE 10V 500 Hz 80 00 0 25 dB 9 4 0 24V ENABLE and AUTO range on the UUT 100V 500Hz 100 00 0 25dB 11 4 0 24V The tolerance limit represents total system inaccuracies 2 Apply 1 0 mV 500 Hz to the UUT INPUT connector 604 3 8922 604 15 CALIBRATION 604 16 The Logarithmic Analog Option should be calibrated when it is first installed or if the limits as stated in the performance test cannot be met Use the following procedure to calibrate the Logarithmic Analog Option If it is not possible to obtain the limits as stated in the following procedure then the option will require trouble shooting If however the limits are met then we recom mend that the performan
111. dapter Feed thru 502 Termination RMS Voltmeter Function Generator 19 mV to 600V 20 Hz 50Hz 0 2 50 Hz 50 kHz 0 1 0 5 3 AC Component lt 100 Short term stability drift and adjustment resolution lt 1 Freq range 50 kHz 11 MHz or greater 3 digits 0 25 Resolution Flatness 50 1 MHz 0 1 50 kHz 10 MHz 0 5 50 kHz 11 MHz 0 1 874 874 BNC 2 required 874 BNC Banana BNC 1 GHz rated 2 Hz 10 Hz 1 2 Hz Sine wave EQUIPMENT John Fluke 5200A amp John Fluke 5205A John Fluke 341A Tektronix SG 503 Series 500 Mainframe JF 8020A GR 874 G20L JF A55 1 GR 874 TL 874 OBPAL GR 874 QBJAL Pomona 1296 TEK 011 0049 01 JF 931 Table 4 2 Input Power Selection SELECTED LINE SOURCE 10 10 WATTS SWITCH POSITION REAR PANEL 120V 50 400 Hz 100V 50 400 Hz 220V 50 400 Hz 240 50 400 hz 250V MAX 4 11 Cleaning CAUTION Do not use aromatic hydrocarbons or chlorinated solvents for cleaning These solutions will react with the plastic materials of the instrument 4 12 Clean the front panel and case with denatured alcohol or a mild solution of detergent and water Clean dust from the interior of the instrument with dry low pressure air 20 psi Contaminants can be washed from the circuit board with demineralized water and a soft brush avoid getting excessive amounts of water on the switches
112. ducts Denver CO 7170 Cambndge Thermionic Cambridge Replaced by 71279 Interconnection Products Inc 57668 R ohm Corp Irvine CA 7962 SGS Thomson Microelectronics Inc Montgomeryville PA 58014 Hitachi Magnalock Corp Now 12581 58104 Simco Atlanta GA 58364 BYCAP Inc Chicago IL 8451 Precision Larnp Cotat CA 58474 Superior Electric Co Bristol CT S8614 Communications Instruments Inc Fairview NC 59124 KOA Speer Electronics Inc Bradford 59422 Holmberg Electronics Irvine 7 8 Federal Supply Codes for Manufacturers cont 59610 Souriau Inc Valencia CA 59635 HV Component Associates Howell NJ 59640 Supertex Inc Sunnyvale CA 59660 Tusonix Inc Tucson AZ 59730 Thomas and Betis Corp IA City IA 59831 Semtronics Corp Watchung NJ 611053 American Components Inc an Insilco Co RPC Div Hayesville NC 6L611 Allen Robert Inc Van Nuys CA 60850 Burgess Switch Co Inc Northbrook IL 6U095 AMD Enterprises Inc Roswell GA 6X403 SGS ATES Semiconductor Corp INpolis IN 6Y440 Micron Technology Inc Boise ID 60046 Power Dynamics Inc West Orange NJ 60197 Precicontact Inc Langhome PA 60386 Squires Electronics Inc Cornelius OR 60395 Xicor Inc Milpitas CA 60399 Torin Engincered Blowers Div of Clevepak Corp Tornngton CT 60496 Micrel Inc Sunnyvale CA 60705 Cera Mite Corp
113. e an overrange overload indication an underrange indication and an analog meter They function automatically to help you make error free measurements 2 18 For example when an input signal level exceeds the display limit for the selected range an overrange will occur The display digits flash while the overrange is present Selecting a higher range will eliminate the overrange condition 2 19 Measurement accuracy is uncertain when the higher voltage ranges are used to measure low level signals To alert you to this condition the decimal point will flash when the input is too low for the selected range less than 180 digits You may eliminate this underrange indication by manually selecting a lower range or selecting autorange 2 4 A line power connector for connecting the unit to line power 2 20 The uncalibrated analog panel meter complements the digital display by linearly tracking the input signal level It provides a 0 to 100 of scale indication for the selected range This feature will aid you in detecting the peak and null points of inputs having varying levels 2 21 Measurement Connections 2 22 OPEN LEADS 2 23 We recommend that shielded or coax leads be used at the input for low level or high frequency measurements Open leads unshielded may pick up interference from other sources causing errors at low levels You may reduce high frequency errors by minimizing inductance and capa
114. e right when viewing the 8922A from the rear 4 Secure the Logarithmic Analog Output Assembly to the top of the transformer bracket see Figure 604 1 using the two screws provided S Plug P501 into J501 located on the Main PCB Assembly 8922A 004 Option Logarithmic Analog Output 6 Solder the Logarithmic Analog Output Assembly s red output lead to the red banana jack and the black lead to the black banana jack 7 Verify operation using the calibration proc dure presented in Section 4 of this manual 604 5 OPERATION 604 6 Once installed the Logarithmic Analog Output Option requires no operator attention other than ensuring that no voltage is ever applied to the option s output banana jacks 604 7 THEORY OF OPERATION 604 8 The Logarithmic Analog Output Option illustrated in Figure 604 2 utilizes the logarithmic characteristics of a P N junction to develop an output proportional to the logarithm of the dc input from the thermal sensor 604 9 The dc output voltage of the thermal sensor develops a collector current in one half of a dual transistor The resulting emitter base voltage is compared to the reference Vbe of the second half and scaled up accordingly This voltage in turn develops a current which is summed with range information to produce the logarithmic output 604 10 The output of the sensor covers one decade 1 to 1V in any one range Scaling is such that one decade corresponds to
115. ect an 11 MHz output on the SG503 and adjust its amplitude with the vernier control until the UUT reads 18 0 mV At this point the Counter Timer should display a stable reading of 01 00000 tl digit 8 Reduce the output amplitude of the 50503 until the Counter Timer display limit of step 7 cannot be met 9 Adjust R404 until the Counter Timer display limit of step 7 1s met 10 Repeat steps 8 and 9 until the Counter Timer display limit can be met at the lowest possible input level COUNTER UNIVERSAL COUNTER TIMER FLUKE 1953A A 509 TERM A INPUT B INPUT ADAPTER 502 2008 20 BNC TO GR ADAPTER Figure 603 5 Calibration Set Up 603 5 8922 603 17 TROUBLESHOOTING 603 18 Table 603 4 should be completed ONLY if the performance test and calibration procedure indicate the the 003 Counter Output Option IS NOT operating correctly This table includes voltage levels and waveforms of a properly functioning 003 Option If you are unable to obtain any value 15 then you should replace the defective component and repeat the entire troubleshooting procedure However if all values are obtained then the performance test and calibration procedure must be repeated 603 19 LIST OF REPLACEABLE PARTS 603 20 list of replaceable parts for the Counter Output Option is given in Table 603 5 and shown in Figure 603 6 Refer to Section 5
116. ectronics Chatsworth CA 15412 Amtron Midlothian IL 15542 Scientific Components Corp Mini Circuits Laboratory Div Brooklyn NY 15636 Elec Trol Inc Saugus CA 15782 Bausch amp Lomb Inc Graphics amp Control Div Austin TX 15801 Fenwal Eletronics Inc Div of Kidde Inc Framingham MA 15818 Teledyne Inc Co Teledyne Semiconductor Div Mountain View CA 15849 Useco Inc Now 88245 15898 Intemational Business Machines Corp Essex Junction VT 16068 Intemational Diode Div Harrison NJ 16162 MMI Southfield MI 16245 Conap Inc Olean NY 16258 Space Lok Inc Burbank CA 16352 Codi Corp Linden NJ 16469 MCL Inc LaGrange IL 16473 Cambridge Scientific Industries Div of Chemed Corp Cambridge MD 16733 Cablewave Systems Inc North Haven CT 16742 Paramount Plastics Fabricators Inc Downey CA 16758 General Motors Corp Delco Electronics Div Kokomo IN 17069 Circuit Structures Lab Burbank CA 17117 Electronic Molding Corp Woonsocket RI 17338 High Pressure Eng Co Inc OK City OK 17504 Aluminum Filter Co Carpinteria CA 17545 Atlantic Semiconductors Inc Asbury Park NJ 17745 Angstrohm Precision Inc Hagerstown MD 17856 Siliconix Inc Santa Clara CA 1817 E amp Gwactee Inc St Louis MO 18235 KRL Bantry Components Inc Manchester NH 18310 Concord Electronics New York NY 18324 Signetics Corp
117. ents Should R101 not have enough adjustment range substitute one of the kit resistors 15 30 1 or 45 3 for R105 if reading is too high R97 if reading is too low or zero 14 Monitor the ac voltage at TP5 with a DVM and apply 100 mV 10 Hz to the input with the instrument in the 200 mV range 15 If the monitored ac voltage is 70 0 mV or greater install the 402 resistors for R96 and R110 16 Ifthe monitored ac voltage is still 70 0 mV or greater install the 158 resistors for R96 and R110 17 Push the AC DC AC switch to the in position and apply 100 mV at 2 Hz to the input 18 If the monitored voltage is 70 mV 100 mV peak or greater replace R123 and R124 with 17 1 metal film resistors 19 If the monitored voltage is until greater than 70 mV 100 mV peak then replace R123 and R124 with 13 7 resistors 20 If the UUT is operating correctly repeat the entire CALIBRATION procedure otherwise return to beginning of Table 4 9 4 50 A D Calibration Resistor Selection 4 51 This procedure is used to determine the correct A D selected resistor R204 and should be completed whenever VR201 is replaced or when R205 does not have enough range to calibrate the A D All possible values for R204 listed in Table 4 11 may be obtained in a set by ordering Part 490722 NOTE The UUT may go into overrange with R204 removed 8922A 1 Place all front panel switches in the out po
118. es indicated in Table 7 1 CHANGES There are no backdating changes at this printing All pcb assemblies are documented at their original revision level 8922 Table 7 1 Manual Status and Backdating Information To adapt manual to earlier rev configurations perform changes in IE B no T DE with GEB T EE rev Logarithmic Analog Output X The revision levels documented in this manual 9 These revision letters were never used in the instrument No revision letter on the PCB 7 2 TABLE OF CONTENTS FIGURE TITLE 8 1 Al Mam PCB Assembly 8 2 1 Display PCB Assembly 8 3 AD AC PCB Assembly 8 4 003 Counter Output Option Assembly 8 5 004 Logarithmic Analog Output Option 8922A Section 8 Schematic Diagrams 8 1 8922 5 p gt bores 021 001 7 14 3563 01 14 35034 OL 123 122 6020 206 WE os gUu cOgSdl 109 XI p 128 iz 101 voan 80282 1 l20 Srey vo2b 1020 gO 8922 1601 Figure 8 1 1 Main PCB Assembly 8 2 Ji05 95 RH
119. f your order include the following information 1 Quantity 2 FLUKE Stock Number 3 Description 4 Reference Designation 5 Printed Circuit Board Part Number 6 Instrument Model and Serial Number CAUTION Indicated devices are Subject to damage by static discharge 2 H1 H2 H3 H4 1 2 MP4 MP5 MP6 MPT MP8 MP9 MP 10 MP 12 MP13 14 MP 15 16 R19 R34 R66 R76 R96 R110 R97 R105 R123 R124 R204 U205 Table 5 1 8922A Final Assembly DESCRIPTION 8922A FINAL ASSEMBLY FIGURE 5 1 MAIN PCB ASSEMBLY AC PCB ASSEMBLY SCREW FHP 6 32 X 3 4 SCREW PHP 2 56 X 1 4 SCREW PHP 4 40 1 4 SCREW FHP 6 32 X 5 8 GUARD COVER SIZE COVER PLATE DOU BAIL RETAINER HANDLE DECAL RETAINER COVER SIZE HANDLE COVER AC SHIELD LINE CORD NOT SHOWN BASE STANDARD DECAL BASE SIDES LATCH FOOT INSULATOR GUARD COVER LUG SOLDER 141 RES MTL FILM 332K 1 1 8W RES MTL FILM 332K 1 1 84 RES MTL FILM 158K 1 1 8W RES MTL FILM 15K 12 1 8W RES MTL FILM 21 5 1 1 8W RES MTL FILM 21 5K 1 1 8W RES MTL FILM 16 5K 1 1 8W IC LARGE SCALE DIGITAL CHIP INSTRUCTION MANUAL 1 INSTALLED OR JUMPERED AS NECESSARY A2 TABLE 5 4 SEE AC PCB ASSY 2 INSTALLED AS NECESSARY ASSY 1 TABLE 5 2 3 PART OF MAIN PCB ASSY 1 TABLE 5 2 SEE MAIN FLUKE STOCK NO ORDER 510602
120. g the AC amplifiers isolate the DVM test lead with a 10 probe otherwise capacitive loading may cause the AC Amplifiers to oscillate 3 MOS type integrated circuits can be damaged by discharging static electricity through the device All circuits of this type are designated on the schematic with this symbol Use care and always use a grounded soldering iron when removing or installing MOS devices 4 47 A troubleshooting guide for the 8922A is presented in Table 4 9 This guide is in a tabular flow chart form and is recommended for use in isolating a problem to a functional circuit area The initial steps in the troubleshooting guide refer to the Performance Check made earlier in this section 4 48 RMS Sensor Replacement 4 49 Use the following procedure when replacing the rms sensor This procedure should be completed if the troubleshooting procedure indicates that the rms sensor must be replaced refer to Figure 4 5 1 Carefully unsolder the defective sensor from the AC PCB using a grounded soldering iron 2 Install the new sensor be sure that the sensor Spacer pad is in place and replace the AC Assembly and shield o om 1 1 1 1 1 4 1 9V 10 14 8V 10 3 Remove R97 or R105 if installed and replace with the bus wire from the sensor kit 4 Remove R96 and R110 if installed and replace R123 and R124 with 20 5k resistors 5 Plug the pro
121. grator for 100 msec Capacitor C203 charges up from the auto zero levelat a rate proportional to the applied input voltage and the comparator s output CM is driven low At the end of the 100 msec integrate period DE goes high applying the reference voltage to the integrator The integrator then discharges at a rate which is constant for all on scale inputs and the controller begins counting clock pulses When C203 has discharged to the auto zero level CM will go high the controller will stop counting and the reading is displayed This starts the auto zero period which allows the A D converter circuitry to settle before the next cycle begins If CM has not occurred before the end of the 200 msec maximum DE period the input will have exceeded the present range In this case the DE period will continue until either CM or the end of the 100 msec AZI occurs When the AC DC function is selected all timing increase approximately 2 5 times 3 24 Controller 3 25 The controller is a custom LSI that controls autoranging the A D converter the display and annunciators In addition the Controller can count in a 8922A non linear dB scale and display its count in dB units A summarized description of each input and output pin used on the controller is give in Table 3 2 and shown in Figure 3 7 3 26 AUTORANGING 3 27 Autoranging is the automatic selection of the instrument s range by the controller With the low range ena
122. igit dBm value of the input signal referenced to one of twelve manually selected impedances 50 to 1200 ohms The dB display mode also uses two annunciators dB and RELATIVE REFERENCE and to establish the instrument s operating status The RELATIVE REFERENCE annunciator lights whenever the REL switch is depressed to indicate that any further dB measurements will be referenced to the voltage present at the time the switch was pressed An UNCAL annunciator lights with both display modes when internal protection circuits are energized When AUTO is selected on the AUTO HOLD switch the out position the autorange mode selects one of seven input ranges to optimize the display resolution 1 5 Complementing the instrument s high digital resolution is an analog panel meter for use in applications that require peaking or nulling This meter does not have 8922A Section 1 Introduction amp Specifications calibration markings since it is intended for peaking and nulling indications only 1 6 Note that the 8922A accomodates floating measurements up to approximately 0 6V peak with respect to earth ground Isolation of 0 6V peak will accomodate the few hundred millivolts of typical common mode voltage Full operator protection is maintained since under fault conditions the diode isolation circuitry conducts to insure that the common mode voltage is never greater than one diode drop 1 7 Several options and accessories are avail
123. ing is required 4 Select input coupling by setting the FUNCTION switch to AC out or AC DC in as desired 5 Select the desired range Use automatic or manual method as desired 6 Set the DISPLAY switches to select the desired measurement mode volts dB or dBm If dB is selected establish 0 dB reference 7 Observing safety considerations connect the test leads to the measurement points The results are displayed on the 8922A readout 3 1 INTRODUCTION 3 2 The information this section describes the theory of operation for the 8922A True RMS Voltmeter The theory has been divided into two major headings overall functional description and detailed block diagram description To gain maximum benefit from this section we recommend that you read each paragraph in the order presented while referring to the associated figure or the appropriate schematic in Section 8 3 3 OVERALL FUNCTIONAL DESCRIPTION 3 4 As you can see in Figure 3 1 the circuitry of the 8922 be divided into two sections analog and digital An overall functional description of these two sections is presented in the following paragraphs ANALOG CIRCUITRY INPUT SIGNAL CONDITIONER INPUT LO S DISPLAY CONTROLLER 8922A Section 3 Theory of Operation 3 5 Analog Circuitry 3 6 The analog section comprises the largest portion of the 8922A circuitry As shown in Figure 3 1 this section is broken down in
124. insures that the varying levels of instrument input voltages are properly scaled before being applied to the rms converter The rms converter works on a thermal sensing principle Basically it operates by balancing the heating power of a dc feedback signal to the heating power of the ac input signal When the two ar equal the circuit is in equilibrium and the dc output voltage applied tothe A D converter is directly representative of the true rms value of the ac input signal The dc output of the rms converter is also applied to the LINEAR ANALOG OUTPUT terminals on the rear panel of the 8922A as well as the analog meter on the front panel of the 8922A 3 9 The last analog circuit we discuss in this section is the power supply This circuit provides three regulated power supplies 5V 15V and 15V to operate the instrument 3 10 Digital Circuitry 3 11 The digital circuitry comprises the A D converter the controller and the display Together these circuits develop a digital representation of the rms value of the input signal produce the commands that set the range and function of the instrument and finally display the input value 3 12 Thedcoutput of the rms converter is translated to a digital representation by the A D converter The digital INPUT ATTENUATOR 1 1 110 11000 UNKNOWN INPUT 180 uV TO 700V AC DECODER FRONT PANEL STEP COMMAND CONTROLLER 8922A representation is processed by
125. ivera Beach FL 21847 Aettech Now TRW Microwave Inc Sunnyvale CA 21962 Vectron Corp Replaced by S W Electronics 22526 DuPont EI DeNemours amp Co Inc DuPont Connector Systems Advanced Products Div New Cumberiand PA 22626 Micro Semiconductor Now 14552 22670 GM Nameplate Seattle WA 22767 ITT Semiconductors Palo Alto CA 22784 Palmer Inc Cleveland OH 23050 Product Comp Corp Mount Vernon NY 23223 CTS Microelectronics NY 23237 I R C Inc Microcircuits Divison Philadelphia PA 23302 S W Electronics amp Mfg Corp Cherry Hill NJ 23730 Mark Eyelet and Stamping Inc Wolcot 23732 Tracor Applied Sciences Inc Rockville MD 23880 Stanford Applied Engineering Santa Clara CA 23936 William J Purdy Co Pamotor Div Burlingame CA 24347 Penn Engineering Co 5 1 Monte CA 24355 Analog Devices Inc Norwood MA 2A444 General Semiconductor Industries Inc Tempe AZ 24546 Bradford Electronics Bradford PA 24618 Transcon Mfg Now DJ Associates Inc 24655 Genrad Inc Replaced General Radio 05173 Concord MA 24759 Lenox Fugle Electronics Inc South Plainfield NJ 24796 AMF Inc Potter amp Brumfield Div San Juan Capistrano CA 24931 Specialty Connector Greenwood IN 24995 ECS Grants Pass OR 25088 Siemen Corp Isilen NJ 25099 Cascade Gasket Kent WA 25403 Amperex Electronic Cor
126. justment range and monitor TP3 with a DVM 3 Select resistors from Table 4 12 starting with the highest value until the DVM reads closest to 0 4 56 volts dc Place the resistor in the socket for R66 if the DVM reads positive R76 if the reading is negative Adjust R72 for a DVM reading of less than 1 mV dc at TP3 AMPLIFIER A 1 Select AC DC set R26 to the center of its adjustment range and monitor TP3 with a DVM 2 Select resistors from Table 4 12 starting with the highest value until the DVM reads closest to 0 volts dc Place the resistor in the socket for R19 if the DVM reads positive R34 if the reading is negative 3 Adjust R26 for a DVM reading of less the mV dc at TP3 4 Perform the complete instrument calibration ASSEMBLY 8922A Final Assembly Al Main PCB Assembly Display PCB Assembly A2 AC PCB Assembly 8922A Section 5 List of Replaceable Parts TABLE OF CONTENTS DRAWING NO 8922A T amp B 8922A 1601 8920A 1602 8922A 1603 TABLE 5 1 5 2 5 3 5 4 5 3 5 6 5 11 5 12 FIGURE 5 1 5 2 5 3 5 4 5 4 5 10 5 11 5 18 8922 5 1 INTRODUCTION 5 2 This section contains an illustrated parts breakdown of the instrument A similar parts listing for each of the Options will be found in Section 6 Components are listed alphanumerically by assembly Both electrical and mechanical components are listed by reference designation E
127. l Inc Micro Switch Div Freeport IL Federal Supply Codes for Manufacturers cont 91934 Millcr Electric Co Woonsocket RI 91967 National Tel Tronics Div of electro Audio Dynamics Inc Mcadvillc 91984 Maida Development Co Hampton VA 91985 Norwalk Valve Co S Norwalk CT 92218 Wakefield Corp The Wakcficld ME 92527 VTC Inc Bloomington MN 92607 Tensolite Co Div of Carlisle Corp Buchanan NY 92914 Alpha Wire Corp Elizabeth NJ 93332 Sylvania Electric Products Semiconductor Products Div Wobum MA 94144 Raythcon Co Microwave amp Power Tube Div Quincy MA 94222 Southco Inc Concordvillc PA 94988 Wagner Electric Corp Sub of Mcgraw Edison Co Whippany NJ 95146 Alco Electronic Products Inc Switch Div North Andover MA 95263 Leccraft Mfg Co Long Island City NY 95275 Vitramon Inc Bridgeport CT 95303 RCA Corp Reeciving Tube Div Cincinnati 95348 Gordos Corp Bloomfield NJ 95354 Methode Mfg Corp Rolling Meadows IL 95573 Campion Laboratories Inc Detroit MI 95712 Bendix Corp Electrical Comp Div Franklin IN 95987 Weckesser Inc Now 85480 96733 SFE Technologies San Femando CA 96853 Gulton Industries Inc Mceasurement amp Controls Div Manchester NH 96881 Thomson Industries Inc Port WA NY 97464 Industrial Retainer Ring Irvington NJ 97525 EECO Inc Santa Ana CA 97
128. lected or damaged by accident or abnormal conditions of operation or handling Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non defective media Fluke does not warrant that software will be error free or operate without interruption Fluke authorized resellers shall extend this warranty on new and unused products to end user customers only but have no authority to extend a greater or different warranty on behalf of Fluke Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price Fluke reserves the right to invoice Buyer for importation costs of repair replacement parts when product purchased in one country is submitted for repair in another country Fluke s warranty obligation is limited at Fluke s option to refund of the purchase price free of charge repair or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period To obtain warranty service contact your nearest Fluke authorized service center or send the product with a description of the difficulty postage and insurance prepaid FOB Destination to the nearest Fluke authorized service center Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destina
129. mental documentation If you order the DMM Digital Interface either as an installed option or as a field installable kit a copy of this manual will be provided Order the 892XA 521K when ordering this option at the same time you order your 8922A Order the 892 521 if you want a field installable kit 6521 3 THE EXTERNAL UNIT 6521 4 The compatibility requirements for the external unit are listed below Pin assignment on the interface cable is shown in Figure 6521 1 The cable connector type is a male 36 pin AMP Blue Ribbon Type series 1 The external unit must provide Operating Power GND and 5V dc at 10 mA 8922A 521 Option DMM Digital Interface b DMM address When reading DMM data the proper DMM address must be sent continuously on the AQ through A3 address lines Resistive termination is 100 tied to 5V only Logic high 1s 3 5 to 5 0V Logic level low is 0 to 1 5V Negative true logic The external unit must be able to accept a Not Address Valid AV Signal line goes from logic high 3 5 to 5V to a logic level low 0 to 1 0V to indicate that the DMM has received the correct DMM address b DMM data BCD DMM data presented nibble serial 4 bit parallel on the W X Y Z lines in the same sequence that data is presented to the DMM display The format of this data 15 presented in Table 6521 1 The external unit must be capable of using the DMM data in this format Logic high level 15 4
130. nables controller ranging see Table 3 5 Output BCD W MSB Z LSB TTL compatible Output Drives blanking input on display decoder driver TT L compatible Input K 700 range overload enable Input VGG 15V supply Enables 3 or 4 digit display in linear mode and determines combination with RD the fixed reference in dB mode k Test not used Input dB Enables dB display mode Output INT Enables not integrate period of A D Converter Output INT Enables integrate period of A D Converter Output AZ Enables auto zero period of A D Converter Enables integrate reference period for positive input of A D Converter Enables integrate reference period for negative input of A D Converter not used ADD SUB STROBE 8920 LSI L FRONT PANEL COMMANDS D E Figure 3 7 Controller Functions Table 3 3 Output Range Codes ee fx 2 mV 20 mV 200 mV 2V 20V 200V 700V Table 3 4 Over Underload Conditions gt 1999 8 25 30 20V range Overload except for 700 700 range Underload minimum input for accurate dB conversion 56 10 4 30 20V range 1 60 20 range gt 700 lt 180 132 dB calculations are based 1200 ohm reference impedance and 20V range The calculation is then corrected for the proper range and the selected impedance
131. nges READING RATE AC 2 5 readings per second AC DC 1 reading per second OVERRANGE INDICATION Flashes maximum allowed reading for that range UNDERRANGE INDICATION Flashes decimal point but continues to display the reading 8922 Table 1 2 Specifications cont GENERAL cont UNCAL INDICATION MAXIMUM COMMON MODE VOLTAGE INPUT COMMON MODE REJECTION LINEAR ANALOG OUTPUT STORAGE TEMPERATURE OPERATING TEMPERATURE HUMIDITY RANGE MTBF POWER DIMENSIONS WEIGHT illuminates to indicate crest factor is exceeded 400 mV rms 600 mV peak diode clamped gt gt 80 dB 50 or 60 Hz with 100 ohms in either lead Each range provides a linear output with 2V dc equal to 2000 counts on the readout 1 0 of reading relative to display essentially 0 ohm output resistance into gt 10 load non isolated with output common the same as input common 40 C to 75 0 C to 50 C 80 RH Greater than 10 000 hours 100V ac 10 120V 10 220V 10 240V ac 10 to 250V ac max selected by internal switches 45 to 440 Hz 10 W max 32 7 cm 12 9 in L X 20 3 cm 8 0 in 10 8 cm 4 3 in H 2 47 kg 5 Ib 7 oz 8922 Table 1 3 Specifications for 8922 Options OPTION 003 COUNTER OUTPUT OPTION OUTPUT VOLTAGE OUTPUT IMPEDANCE MAXIMUM ISOLATED LEVEL OPTION 004 LOGARITHMIC ANALOG OUTPUT OPTION OUTPUT VOLTAGE DC LINEARIT
132. ntemational Development amp Trade Dallas TX 49671 RCA Cor New York NY 49956 Raytheon Company Executive Offices Lexington MA 50590 Mostek Corp Replaced by SGS Thompson Microelec tronics SF520 Panel Components Corp Santa Rosa CA 5 575 Nobel Electronics Suffem NY 5W664 Div of Nihon Dempa Kogyo LTD Lynchburg VA 50802 Dennison Mfg Co Framingham MA 50088 SGS Thomson Microelectronics Inc Carrollton TX 50120 Eagle Picher Industries Inc Electronics Div CO Springs CO 0157 Midwest Components Inc Muskegon MS 50356 Teac Corp of America Industrial Products Div Montebello CA 50364 MMI Inc Monolithic Memories Inc Military Products Div Santa Clara CA 0472 Metal Masters Inc City of Industry CA 50541 Hypertronics Corp Hudson MA 50558 Electronic Concepts Inc Eatontown NJ 50579 Litronix Inc Cupertino CA 50891 Semiconductor Technology Swart FL 50934 Tran Tec Corp Columbus NE 51167 Aries Electronics Inc Frenchtown NJ 51284 Mos Technology Norristown 51249 Heyman Mfg Co Cleveland OH 1372 Verbatim Corp Sunnyvale CA 51398 MUPAC Corp Brockton MA 51406 Murata Erie No America Inc Also see 72982 Manetta GA Federal Supply Codes for Manufacturers cont 51499 Amtron Corp Boston MA 51506 Accurate Screw Machine ASMCO Nutley NJ 51605 CODI Semiconductor Inc Kenilwor
133. nter Output Option If it is not possible to obtain the limits as stated in the following procedure then the option will require troubleshooting If however the limits are met then we recommend that the performance test be completed as a check l Remove the UUT s top cover and measure the inverter power supply voltages MEASURE BETWEEN DVM DISPLAY C413 and Ground 5 0V 0 3V C414 and Ground 6 2 0 3V 2 Connect the AC calibrator UUT oscilloscope and terminations as shown in Figure 603 3 3 Set the AC calibrator to its IV range at 10 kHz set the oscilloscope time base to 20 usec div and Vert to 50 mV div and set the UUT to AC FUNCTION VOLTS DISPLAY MODE and 2V range HOLD 4 Apply 180 mV 10 kHz from the AC calibrator to the input of the UUT Using the oscilloscope check the UUT s counter output and adjust R404 LEVELED SINE WAVE GENERATOR 56503 BNC TO GR 8922 until a symmetrical square wave is obtained The amplitude of the square wave should be 100 mV 20 and must not change as the input to the UUT is increased up to 18V 5 Disassemble the set up as shown in Figure 603 3 and connect the 50503 UUT Universal Counter Timer and terminations as shown in Figure 603 5 6 Set the SG503 to its 11 MHz range set the Counter Timer for frequency ratio measurement with a 10 sec gate time and set the UUT to FUNCTION VOLTS DISPLAY MODE and 200 mV range HOLD 7 Sel
134. od of 1 year upon delivery to the original purchaser The warranty is located on the back of the title page 4 5 Factory authorized calibration and service for your 8922A is available at various locations throughout the world A complete list of these factory authorized service centers is included in Section 7 If requested an estimate will be provided to you before work is begun on an instrument that is beyond the warranty period 4 6 GENERAL MAINTENANCE 4 7 Access Information 4 8 To gain access to the interior of the instrument remove the four screws located on the bottom of the case The top cover can now be removed 4 9 INPUT POWER SELECTION 4 10 The 8922A may be operated from any one of the line voltages shown in Table 4 2 Use the following procedure to prepare the instrument for use with the local line power 1 Disconnect the instrument from the line power and remove its top cover four screws on the bottom of the unit hold the top cover in place 2 Set switches 5209 and 5210 to the positions indicated in Table 4 2 for the desired line voltage 3 Install the top cover and connect the unit to line power 4 1 8922 Table 4 1 Recommended Test Equipment EQUIPMENT RECOMMENDED REQUIREMENT NOMENCLATURE Precision AC Calibrator and Power Amplifier DC Voltage Calibrator Leveled Generator DVM Flat Attenuator 20 dB three required 1V Transfer Standard GR Tee Adapter Adapter A
135. of this manual for ordering information Table 603 4 Counter Output Option Troubleshooting 1 Using the 8020A or any compatible 3 1 2 digit meter measure the following supply voltages SUPPLY VOLTAGE MEASURE BETWEEN HIGH DVM DISPLAY TERMINAL AND LOW 8020A TERMINAL 15 U401 1 and Input 15 00 0 1V 15 U401 6 and Input 15 00 0 2V 5 402 2 and Input 5 00 0 25V 5 3 U401 1 and Chassis Ground 5 3 50 3 6 5 U401 6 and Chassis Ground 6 5 0 3 2 Using an oscilloscope with x10 probe Tek 475 equivalent check the following points the indicated waveforms MEASURE BETWEEN HIGH TERMINAL LOW TERMINAL T402 1 and Input 7402 3 and Input 1402 6 and Input T402 8 and Input Common 603 6 SCOPE DISPLAY 2V DIV 10 us DIV 2V DIV 10 us DIV 8922 Table 603 4 Counter Output Option Troubleshooting cont 2a Using Fluke 5200A or equivalent apply 1V 10 kHz signal to input of UUT MEASURE BETWEEN HIGH SCOPE DISPLAY TERMINAL LOW TERMINAL Gate of 401 and Input 2 DIV 10 us DIV Drain of Q401B and Input Common U401 3 and Input Common 2V DIV 10 uis DIV 0401 4 and Input 0 50 mV DIV 10 us DIV 0401 9 and Input Common 0 1V DIV 10 us DIV T401 input and Input 0 5V DIV 10 ps DIV 603 7 8922 Table 603 4
136. or measurements at a single test point press the dB switch then the REL switch and watch the dB change as you make adjustments or circuit changes 2 63 typical application for the dB measurement mode is shown in Figure 2 5 The relative reference 0 dB has been established at TP2 Subsequent dB measurements at 4 and 5 are displayed in dB as shown 2 64 RELATIVE REFERENCE SELECTION 2 65 Use the following procedure to enable the relative REL display mode and select a relative 0 dB reference 1 Connect the reference source to the 8922A input terminals If desired measure and adjust the reference supply voltage level 2 Select the autorange mode AUTO 3 Release the REL dBm switch out 4 Depress the dB VOLTS switch in 5 With the reference level still connected to the input terminals depress the REL switch The display should now read 0 dB and the RELATIVE REFERENCE annunciator should be lit 2 66 OTHER dBm REFERENCES 2 67 When dBm reference other than those given on the dBm REFERENCE switch is required use the following procedure to establish the reference 1 Define the reference impedance and calculate V using the following formula V 0 001 x R 2 Apply an adjustable voltage source to the 8922A input and set the dB VOLTS switch to the VOLTS position Adjust the voltage source for a display reading equal to the calculated value of V 2 7 8922 2
137. ouse Midrand 1685 TEL 27 11 315 0757 FAX 27 11 805 1192 Spain Fluke S L Centro Empresarial Euronora c Ronda de Poniente 8 28760 Tres Cantos Madrid Spain TEL 34 1 804 2301 FAX 34 1 804 2496 Sweden Fluke Sverige AB CSS P O Box 61 S 164 94 Kista TEL 46 8 751 0235 or 0230 FAX 46 8 751 0480 Switzerland Fluke Switzerland AG CSS Rutistrasse 28 CH 8952 Schlieren Switzerland TEL 41 1 730 3310 or 730 3932 FAX 41 1 730 3932 Taiwan Schmidt Scientific Taiwan Ltd 6th Floor No 109 Tung Hsing Street Taipei Taiwan TEL 886 2 767 8890 or 501 5737 FAX 886 2 767 8820 or 765 3717 Thailand Measuretronix Ltd 2102 31 Ramkamhang Road Bangkok 10240 TEL 66 2 375 2733 or 2734 FAX 66 2 374 9965 Turkey Pestas Prof Elektr Sist Tic V Selcuklar Caddesi Meydan Apt No 49 Daire 23 Akatlar 80630 Istanbul TEL 90 212 282 7838 FAX 90 212 282 7839 Service Centers cont U A E Haris Al Ltd P O Box 8141 Dubai TEL 971 4 283623 or 283624 FAX 971 4 281285 United Kingdom Fluke U K LTD CSS Colonial Way Watford Hertfordshire WD2 4 TEL 44 923 240511 FAX 44 923 225067 Uruguay Coasin Instromontos S A Casilla de Correo 1400 Libertad 2529 Montevideo TEL 598 2 492 436 659 FAX 598 2 492 659 Venezuela Coasin C A Calle 9 Con Calle 4 Edif Edinurbi Piso 3 La Urbina Caracas 1070 A Venezuela TEL 58 2 241 6214 FAX 58 2
138. p Semiconductor amp Micro Circuit Div Slatersville RI 25435 Moldtronics Inc Downers Grove IL 25706 Daburn Electronic amp Cable Corp Norwood NJ 26402 Lumex Inc Bayshore NY 26629 Frequency Sources Inc Sources Div Chelmsford MA 26806 Amenican Zettler Inc Irvine CA 27014 National Semiconductor Corp Santa Clara CA 27167 Coming Glass Works Coming Electronics Wilmington NC 27264 Molex Inc Lisle IL 27440 Industrial Screw Products Los Angeles CA 27494 Staffall Inc Providence RI 27745 Associated Spring Bames Group Inc Syracuse NY 27918 Component Parts Corp Bellmore NY 27956 Relcom Now 14482 28175 Alpha Metals Chicago IL 28198 Positronic Industries Springfield MO 28213 MN Mining amp Mfg Co Consumer Products Div 3M Center Saint Paul MN 28309 Kaiser Minette 28425 Serv O Link Euless TX 28478 Deltrol Corporation Deltrol Controls Div Milwaukee WI 28480 Hewlett Packard Co Corporate HQ Palo Alto CA 28484 Emerson Electric Gearmaster Div McHenry IL 28520 Heyco Molded Products Kenilworth NJ 28932 Lumax Industrials Inc Altoona PA 29083 Monsanto Co Santa Clara CA 29604 Stackpole Components Co Raleith NC 29907 Omega Engineering Inc Stamford CT 3D536 Aimsco Inc Seattle WA 30035 Jolo Industries Inc Garden Grove CA 30045 Solid Power Corp Farmingdale NY 30146
139. ption amp Accessory Information TABLE OF CONTENTS DESCRIPTION PAGE ACCESSORIES Offset Richt Rack Mount ERR Wed 600 Do ble Offset Rack Mount Meee 600 1 Panel Mount DIN SIE qe 600 1 5 Counter Output vs Sai 603 1 Logarithmic Analog QUIDUE ERA ERR ES 604 1 DMM Digital Interlace MEN OE bod e eS EE EM 6521 1 DMM TIEBE 485 IhteriaGe o l 6529 1 6 1 8922 6 1 INTRODUCTION 6 2 This section of the manual contains information concerning the options and accessories available for use with the Model 8922A This section consists of an introductory section an accessories subsection and a series of option subsections All options and accessories are listed by model or option number in the table of contents included in this section 6 3 ACCESSORIES 6 4 Hardware type accessories 1 rack mounting kits and cables are documented in the accessories subsection While option numbers 003 004 are documented as individual subsections Each subsection contains all of the information necessary to install operate and maintain each option and accessory This includes a list of replaceable parts and a schematic when applicable 6 5 O
140. sboo ai p A 3301 10 Lo 2 25507 i IRR a gt 4 5301 jas 2 3 3301 sosa e 0700 LOGIC 1 0v Pru Kuu 4301 05 LOGIC O I2v NOTES UNLESS OTHERWISE SPECIFIED Y V20 LOGIC 9 v Soren E ALL RESISTANCE VALUES ORMS 1 ALL VALUES IN MICROFARADS 5 MOUNTED ON FRONT PANEL 5 47 MOUNTED ON REAR PANEL PANEL MOUNTED COMPONENTS CRI Fl dle MI w I NOS NOT USED 230 218 R240 244 208 G 208 4209 gt THERMAL FUSE PART OF TRANSFORMER ASSY 201 8922 4501 1 DIGITAL OUT PUT eo 2 2 XE 5 lt 7 4 S L 5N 8 gt W 9 Bb2 IO OND W x X J30 G 4501 12 501 1 COUNTER OUTPUT 1401 1 L 3 gt 5 5 KEN 8922 1001 8922 CR301 O R301 Q DS310 DS308 033097 e o e C301 P301 10 8 9 9000000004 Figure 8 2 A1A1 Display PCB Assembly 8920A 1602 8922 NOTES UNLESS OTHERWISE SPECIFIED ALL RESISTANCE VALUES IN OHMS c ALL CAPACITANCE VALUES IN MICRO FARADS 501 09100 10 20 9401 3 2105 17 pm 105 5 pe all GND 205
141. sing a relative voltage reference Indicate DMM range by decimal point locations A push push switch used to turn the instrument ON in and OFF out Rotary switch used to manually select 1 of 12 reference impedances when the dBm and dB display modes are selected A push push switch used to select either the relative dB or the dBm display mode When REL is depressed the existing input level is used to establish a O dB reference Subsequent level changes at the input are displayed in dB and referenced to the operator established O dB level When dBm is selected measurements are displayed in terms of dBm and the dBm REFERENCE setting A push push switch used to select either the voltage out or dB in display mode A momentary pushbutton switch used to incrementally step the voltmeter to its higher range This switch is enabled only when the HOLD RANGE mode is selected A push push switch used to select the manual HOLD or autorange AUTO mode Selecting HOLD in enables manual upranging with the STEP UP switch Selecting AUTO out enables the unit to autorange A push push switch which when depressed engages a single pole filter to reject unwanted high frequency signals See the Specifications table for effect on accuracy A push push switch used to include in or delete out dc components as part of the input signal level When AC DC is selected in damping increases which extends low frequency operation down to
142. sition and set R205 to the center of its adjustment range 2 Apply 100 0 mV 200 Hz to the input and select resistors R204 from Table 4 11 until the display reads closest to 100 0 mV 3 Verify that R205 has adjustment range on both sides of the displayed 100 0 mV reading 4 Perform the instrument calibration Table 4 11 R204 Resistive Values mf 1 1 8W 4 52 DC Offset Resistor Selection 4 53 Use this procedure to determine the correct DC offset selected resistors R19 or R34 for amplifier A and or R66 or R76 for amplifier B Use the procedure when the amplifier offset cannot be adjusted to with R26 and or R72 usually because one or more of the following have been replaced Amplifier 09 Q8 010 and 012 Amplifier 036 037 038 and 040 All possible values for R19 or R34 amplifier or R66 or R76 amplifier B listed in Table 4 12 may beobtained in a set by ordering Part 490730 Two sets will be necessary if both amplifiers require the same selected resistor value Table 4 12 R19 R34 R66 R76 Resistive Values mf 5196 1 8W 4 19 8922 4 54 4 55 4 20 SET UP l Remove the cover shield of the AC Converter PCB 2 Connect a short jumper between input low and the metal fence on the AC Converter PCB AMPLIFIER B must be done before amplifier A 1 Apply power short the input select AC RANGE HOLD and step up to the 2V range 2 Set R72 to the center of its ad
143. sured If the measurement frequency is low this assumption holds true 8922A 2 34 COMMON MODE VOLTAGE MEASUREMENTS 2 35 The 8922A will accomodate common mode voltages as high as 600 mV peak usually enough to eliminate ground loops in the power connections Higher common mode voltages will be clamped to 600 mV uptoa 25 amp maximum load capability 502 MATCHING POWER SPLITTER 50 TEST CIRCUIT 500 TERMINATION A 50Q 500 50 RF TEST SOURCE CIRCUIT TERMINATION B Figure 2 3 Matched Impedance Measurement Techniques 2 36 Input Signal Considerations 2 37 The 8922 is a true rms voltmeter and as such 15 subject to input conditions not encountered with the ordinary average reading ac voltmeter Of these the two most important are crest factor and input coupling 2 38 CREST FACTOR 2 39 Crest factor 18 the ratio of the peak voltage to the rms voltage with the dc component removed Above 10 Hz the crest factor is limited by the dynamic range of the amplifiers Crest factor capability in this frequency range will be at least 7 for full scale inputs and will increase 2 5 8922 proportionally as the input goes down scale Use the following formula to calculate the crest factor of signals less than full scale 7 Range Input Level For example given the DMM is at the 20V range witha 10 input Crest Factor _ gt 20 _ 140V _ Crest Factor 10V
144. t Mfg Co Inc Dover NH 12749 James Electronic Inc Chicago IL 12856 MicroMenzals Inc Anaheim CA 12881 Metrex Cor Edison NJ 12895 Cleveland Electric Motor Co Cleveland OH 12954 Microsemi Corp Components Group Scottsdale AZ 12969 Unitrode Corp Lexington MA Federal Supply Codes for Manufacturers cont 13050 Potter Co Wesson MS 13103 Thermalloy Co Inc Dallas TX 13327 Solitron Devices Inc Tappan NY 13511 Bunker Ramo Corp Amphenol Cadre Div Los Gatos CA 13606 Sprague Electric Co Use 56289 13689 SPS Technologies Inc Hatfield NJ 13764 Micro Plastics Flippin AZ 13919 Burr Brown Research Corp Tucson AZ 14099 Semtech Corp Newbury Park CA 14140 McGray Edison Co Commercial Development Div Manchester NH 14189 Ortronics Inc Orlando FL 14193 Cal R Inc Santa Monica CA 14301 Anderson Electronics Hollidaysburg PA 14329 Wells Electronics Inc South Bend IN 14482 Watkins Johnson Co Palo Alto CA 14552 Microsemi Corp Formerly Micro Semiconductor Santa Ana CA 14604 Elmwood Sensors Inc Pawtucket RI 14655 Comell Dublier Electronics Div of Federal Pacific Electric Co Govt Cont Dept Newark NJ 14704 Crydom Controls Division of Int Rectifier El Segundo CA 14752 Electro Cube Inc San Gabriel CA 14936 General Instrument Corp Discrete Semi Conductor Div Hicksville NY 14949 Trampeter El
145. tatus b Range Status O dB OL UL Status B B B B LSD B B B B 4SD B B B 3SD B B B B 25 1 0 21 Polarity MSD Logic 0 low Logic 1 high 1 See inset Range Table DMM reading 16 in dB DMM reading is in volts Low indicates valid data on WXYZ J indicates the number of display digits J 015 3 digits J 115 4 digits J LMN indicate dB reference selected see inset 892 dB Reference Table DVM will flash decimal point for underload and flash all digits for inputs greater than 700 _ Least Dignificant Digit 250 follows MSD in sequence 1 If UL 1 Polarity bit 21 7 21 0 Overload DMM input has exceeded DMM capacity for that range Underload DMM input is below optimum for that range reading may not be accurate Most Significant Digit is 1 Most Significant Digit is 6521 3 6521 4 6529 1 INTRODUCTION 6529 2 The DMM IEEE 488 Interface Translates between the 8922A and the General Purpose Interface Bus GPIB as defined by the IEEE 488 1978 The interface is composed of one DMM 1120A Interface PCB mounted in and 1120A Translator and one or more DMM Digital Interface s 521 Option The 8922A _ 519 Option DMM IEEE 488 Interface interface implements the following IEEE functions SH1 13 All additional information 15 contained in supplemental literature If you order the DMM IEEE 488 Interface either as an installed option or
146. tection diode fixture into J106 Note that the fixture is symmetrical 6 Turn R111 to its maximum counterclockwise position 7 Place all of the front panel switches to their out position and apply power to the instrument 8 Select AC DC RANGE HOLD and up range to the 2V range Monitor TP3 with a DVM connect a DC calibrator to the input referto Figure 4 6 and apply 1 8V dc The sensor input should now be clamped by the protection circuit and TP3 should read about half the display reading 9 Turn R111 slowly clockwise and observe that the DVM and instrument display readings increase The dc voltage at TP3 should stop increasing at around 0 8 to 1 0V The instrument display should stop increasing around 1 5 to 1 99V the point at which the protection diodes clamp the input DO NOT ALLOW THE INSTRUMENT TO GO INTO OVERLOAD Return R111 to its CCW stop and repeat the procedure with a negative dc input Turn R111 CCW until TP3 reads about 5 and remove the calibrator and the protection diode fixture 10 Short the input select RANGE HOLD and step up range to the 2V range Monitor TP3 and adjust R72 for 0 1 11 Select AC DC and adjust R26 for 0 1 mV dc on TP3 12 Go to the rms protection circuit calibration procedure RMS Protection Circuit and complete the steps as listed Return to step 13 below 13 Perform calibration steps 1 through Ic as listed in Table 4 6 Low and Midband Adjustm
147. th NJ 51642 Centre Engineering Inc State College PA 51705 1 Palo alto 1791 Statek Corp Orange CA 51984 NEC America Inc Falls Church VA 52063 Exar Integrated Systems Sunnyvale CA 52072 Circuit Assembly Corp Irvine CA 52152 MN Mining amp Mfg Saint Paul MN 52333 API Electronics Haugpauge Long Island NY 52361 Communication Systems Piscataway NJ 52500 Amphenol RF Operations Burlington MA 52525 Space Lok Inc Lerco Div Burbank CA 52531 Hitachi Magnetics Edmore MO 52745 Les Angeles CA 52763 Stettner Electronics Inc Chattanooga TN 52769 Sprague Goodman Electronics Inc Garden City Park NY 2771 Moniterm Corp Amatrom Div Sama Clara CA 52840 Westem Digital Corp Costa Mesa CA 53021 Sangamo Weston Inc See 06141 53036 Textool Co Houston TX 53184 Xciton Corp Lathan NY 53217 Technical Wire Products Inc Santa Barbara CA 53342 Industries Inc Phillipsburg NJ 53673 Thompson CSF Components Corp Semiconductor Div Conaga Park CA 3718 Airmold W Grese amp Roanoke Rapids NC 3848 Standard Microsystems Hauppauge NY 53894 AHAM Inc RanchoCA CA 53944 Glow Lite Pauls Valley OK 54178 Plasmetex Industries Inc San Marcos CA 54294 Shallcross Inc Smithfield NC 54453 Sullins Electronic Corp San Marcos CA 54473 Matsushita Electric Corp Pan
148. the controller to obtain a bcd output which is proportional to the selected display mode VOLTS dB dBm REL The BCD output is decoded and applied to the display 3 13 DETAILED BLOCK DIAGRAM DESCRIPTION 3 14 Inthe following paragraphs we discuss detail the individual functions within the major areas of circuitry in the 8922A Each major circuit area is detailed in Figure 3 2 The description for each circuit is keyed toa separate block diagram or to the schematics in Section 8 3 15 Signal Conditioner 3 16 The signal conditioner utilizes an input attenuator two amplifiers Amp A and B and the intermediate attenuator As shown in Figure 3 3 these circuits are used to scale the varying voltage levels applied to the instrument so that the input to the rms converter is always between 0 09V rms and 1V rms The diagram in Figure 3 3 illustrates the configuration of the circuitry within the signal conditioner The controller through a range decoder network issues commands which select the appropriate division factor in the attenuators and the correct multiplication factor for amplifier A Table 3 1 lists each operating range and the corresponding division and multiplication factors for the attenuators and amplifier note that amplifier B has a fixed gain of X21 1V RMS ATTENUATOR FULL SCALE 1 or 10 AMP RMS B SENSOR AT X2 SIGNAL CONDITIONER INTERMEDIATE Figure 3 3 Signal Conditioner 3
149. tion If Fluke determines that the failure was caused by misuse alteration accident or abnormal condition of operation or handling Fluke will provide an estimate of repair costs and obtain authorization before commencing the work Following repair the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges FOB Shipping Point THIS WARRANTY IS BUYER S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES INCLUDING LOSS OF DATA WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT TORT RELIANCE OR ANY OTHER THEORY Since some countries or states do not allow limitation of the term of an implied warranty or exclusion or limitation of incidental or consequential damages the limitations and exclusions of this warranty may not apply to every buyer If any provision of this Warranty is held invalid or unenforceable by a court of competent jurisdiction such holding will not affect the validity or enforceability of any other provision Fluke Corporation Fluke Europe B V P O Box 9090 P O Box 1186 Everett WA 5602 B D Eindhoven 98206 9090 The Netherlands 5 94 SECTION 8922A Table of Contents TITLE PAGE INTRO
150. to Corp Providence RI 71744 General Instrument Corp Lamp Div Worldwide Chicago IL 71785 TRW Inc Cinch Connector Div Elk Grove Village IL 71984 Dow Coming Corp Midland MI 72005 AMAX Specialty Metals Corp Newark NJ 72136 Electro Motive Mfg Corp Florence NC 72228 AMCA Intemational Corp Continental Screw Div New Bedford MA 72259 Nytronics Inc New York NY 72619 Amperex Electronic Corp Dialight Div Brooklyn NY 72653 GC Electronics Co Div of Hydrometals Inc Rockford IL 72294 Dzus Fastner Co Inc West Islip NY 72928 Gulton Industries Inc Gudeman Div Chicago IL 72962 Elasuc Stop Nut Div of Harrard Industries Union NJ 72982 Erie Specialty Products Inc Formerly Murata Erie Ene 73138 Beckman Industrial corp Hclipot Div Fullerton CA 73168 FenwalInc Ashland MA 73293 Hughes Aircraft Co Electron Dynamics Div Torrance CA 73445 Amperex Electronic Corp Hicksville NY 73559 Carlingswitch Inc Hartford CT 73586 Circle F Industries Trenton NJ 73734 Federal Screw Products Inc Chicago IL 73743 Fischer Special Mfg Co Cold Spring KY 73893 Microdot Clemens MS 73899 JFD Electronic Components Div of Murata Oceanside NY 73905 FL Industries Inc San Jose CA 73949 Guardian Electric Mfg Co Chicago IL 74199 Quam Nichols Co Chicago IL 74217 Radio Switch Marlboro
151. to the following areas the signal conditioner the rms converter and the power supply 3 7 Referring to Figure 3 2 you can see that the signal being measured by the 8922A can be coupled to the signal conditioner in one of two ways AC or AC DC When you place the FUNCTION switch on the front panel to the AC position all input signals are capacitively coupled when the AC DC position is selected the input signal is dc or directly coupled This feature contributes to the measurement accuracy when dc components are present in the input signal LINEAR ANALOG OUTPUT 8920A only CONVERTER A D CONVERTER Figure 3 1 Overall Block Diagram 3 1 8922 LAdNI lt smu je L __ dated cdl OLNV SAHOLIMS 104100 13 252984333 1 511014 SWY Al Ol l YOLVNNILLV ILVIGSAWYSLNI 13 4 14083 HOLVIONANNY 7 40190 NANNY 104100 0832 0109 Y 390915 niet INI TEE assesses ONIGQOON3 eee qu a mam eee eee Vm sr 149 H3MOd 81 81 AS B OT NI ZH OOP 09 AOZZ2 GLL 3MOd Figure 3 2 Detailed Block Diagram 3 2 3 8 The signal conditioner
152. unction range and input signal as indicated in Table 4 5 Note any deviation between the display of the UUT and the specified limits 8922A 4 24 AC Low Level Check 4 25 This procedure will verify that the UUT s low level AC performance meets the specifications of Section 1 Set up the test equipment as shown in Figure 4 3 and complete the AC Low Level Calibration procedure but replace steps 2 d and 2 e with the following d Note that the UUT s display reads the same error as noted in step 1 38 digits e Note that the UUT s display reads 0 1900 4 digits 4 26 High Frequency Response Check 4 27 This procedure will verify that the UUT s high frequency response meets the specifications of Section 1 Set up the test equipment as shown in Figure 4 4 and select the required input amplitude and frequency as indicated in Table 4 6 Note any discrepancies between the display reading and the limits given Table 4 4 dB Display Mode Check REFERENCE SOURCE OHM DISPLAY READING COMMENTS Note that the dB annunciator is lit Note that the dB and REL annunciators are lit Step up to the 20V range note that the dB and REL annunciators remain lit 8922 DC CALIBRATOR 341A Figure 4 2 DC Low Level Check Table 4 5 DC Low Level Check UUT DISPLAY 6 COUNTS 1 000 30 counts UUT dc circuitry functioning 02 00 or mV rms The ac input components should be less than see comment
153. ve the equipment make a thorough inspection for any possible shipping damage If your 8922A was damaged in shipment contact your nearest John Fluke Service Center immediately A list of these service centers may be found in Section 7 2 5 Ifreshipment of the instrument is necessary use the original container If the original container is not available a new one may be obtained from the John Fluke Mfg Co Inc Please indicate the instrument s model number 8922A when requesting a new shipping container 2 6 INSTALLATION 2 7 8922A is designed for bench top use for installation in a standard 19 inch equipment rack or for panel mounting into any DIN size opening Available rack mounting kits are listed in Table 1 2 In bench top environments the 8922A may be stacked with other Fluke products that use the PTI case To connect two or more PTI cases pull the side connectors out place one case squarely on top of another and press in on the side connectors of the top case until they seat firmly into the slots on the case below See Figure 2 1 8922A Section 2 Operating Instructions CAUTION Before you attempt to lift a series of stacked instruments check each unit to ensure that its case connectors are properly mated and latched to the next lower instrument SIDE CONNECTORS Figure 2 1 PTI Connection 2 8 INPUT POWER 2 9 The 8922A can be operated from one of several line voltages 120 100 220 or
154. verdrive the transfer standard 2 Note the reading at the output of the 55 transfer standard and maintain this by readjusting the generator s level for other frequencies Table 4 8 High Frequency Calibration SOURCE UUT SOURCE UUT LIMIT PUES LEVEL RANGE FREO d DISPLAY COUNTS 1 001 2mV 2 001 2mV 3 001 2mV 4 0 01 20 mV 5 0 01 20 mV 6 If C33 was adjusted go to step 1 7 0 01 20 mV 8 0 01 20 mV 9 0 1 200 mV 10 0 1 200 mV 11 1 2 12 1 2 13 1 2 14 1 2 10 10 1 50 10 50K 10M 1M source 1 000 13 1 000 3 Chk 1 000 0 to 20 source 10 00 1 C33 10 00 3 Chk 10 00 20 Chk 10 00 3 source 100 0 1 Chk 100 0 5 1 000 1 5 1 000 5 1 000 20 Chk 1 000 3 Reduce the frequency to the point between 5 and 11 MHz where the maximum reading on the display occurs 4 13 8922 8600 T 3 1 TRANSFER STANDARD SHIELDED CABLE 1 NOTE DVM SET DVM TO 200 mV RANGE 874 20dB 874 20dB 500 Em ATT ATT TERM 8922A TERMINATION MUST BE CONNECTED AS CLOSE AS POSSIBLE TO THE INPUT OF THE 8922A Figure 4 7 High Frequency Calibration 4 42 RMS Protection Circuit Calibration CAUTION Resistor R111 controls the protection circuit for the rms sensor DO NOT make any adjustments to R111 other than those listed below Indiscriminate adjustments ma
155. y calibration cycle FUNCTIONS DISPLAYS RANGING LOW PASS FILTER MAXIMUM INPUT RESPONSE TYPE RESPONSE TIME AC AC DC INPUT IMPEDANCE CREST FACTOR FREQUENCY RANGE ELECTRICAL VOLTS Display Mode RANGES RESOLUTION AC true rms AC DC true rms with 2 Hz damping for improved low frequency performance Digital Display Panel selectable for volts or dB Analog peaking nulling meter Autoranging HOLD to defeat Autoranging STEP UP for manual up ranging Ranges up at 2000 counts Ranges down at 180 counts 200 kHz Low Pass Filter 700 rms 1000V peak not to exceed 1 108 volts Hz product on any range True rms thermal converter will accept sine complex pulse or random waveforms 1 6 seconds typically to rated accuracy within a range composed of 1 second settling time and 0 6 seconds macimum digitizing time 7 seconds maximum to rated accuracy within a range composed of 5 seconds settling time and 2 seconds maximum digitizing time 2 mV to 700V range 10 M amp 2 shunted by lt 30 pF 7 at full scale increasing proportionately as percent of scale decreases See the Crest Factor portion of the Input Signal Considerations in Section 2 2 mV 20V range 2 Hz to 11 MHz 200V 700 range 2 Hz to 1 MHz 2 mV 20 mV 200 mV 2 20V 200V and 700V 0 05 of range 3 digits 8922 Table 1 2 Specifications cont ELECTRICAL dB Display Mode dB RA
156. y cause component damage 4 43 Use the following procedure to calibrate the protection circuit of the rms sensor This procedure should be completed only if the rms sensor has been replaced or if the limit in step 20 of Table 4 9 cannot be met NOTE The ambient temperature must be 23 C 5 and the 15V supplies must be calibrated 1 Remove the tape dot on 111 and turn R111 to its maximum CCW position 2 Select AC AUTORANGE then HOLD and STEP UP as necessary to lock the UUT in the 20 mV range Refer to Figure 4 5 for the calibration and test point locations Monitorthe voltage at TP4 4 14 with a DVM and apply 24 0 mV 200 Hz to the input Observe that the UNCAL annunciator lights up 3 Turn R111 slowly clockwise until the DVM reading stops decreasing The UNCAL annunciator should go out Turn R111 slightly clockwise so that the UNCAL annunciator remains unlit but lights when the input voltage is increased to 24 1 mV Increase the input voltage to 25 0 mV and note the voltage on TP4 Apply an input signal of 250 mV at 2 kHz The voltage at TP4 should not change by more than 20 mV 4 Replace the tape dot on R111 or use Glyptol 4 44 TROUBLESHOOTING 4 45 This section contains information selected to assist troubleshooting the Model 8922A Before attempting to troubleshoot the instrument verify that the trouble is actually in the instrument and is not caused by faulty external equipment or improper
157. y replace the defective component and repeat the performance test and calibration procedure 604 19 LIST OF REPLACEABLE PARTS 604 20 A list of replaceable parts for the Logarithmic Analog Output Option is given in Table 604 2 and shown in Figure 604 4 Refer to Section 5 of this manual for ordering information Figure 604 3 Logarithmic Analog Output Option Test Set Up 604 4 004 501 C502 C503 C504 C505 C506 CR501 CR502 CR503 J501 J502 MP 1 P501 Q501 Q502 R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 R519 R520 R521 R522 R523 R524 R525 TP501 TP502 TP503 TP504 0501 0502 W502 Table 604 2 Logarithmic Analog Output Option PCB Assembly DESCRIPTION LOGARITHMIC ANALOG OUTPUT OPTION FIGURE 606 4 89204 4014 CAP CER 1000 PF 10 500V 100 10 1000V MYLAR 2 0 UF 20 100V 22 UF 20 15V ELECT TA 2 2 UF 10 20V ELECT TA 2 2 UF 10 20V DIODE HI SPEED SWITCH DIODE HI SPEED SWITCH DIODE HI SPEED SWITCH BANANA JACK BLACK BANANA JACK RED COVER PLATE LOG ANALOG OPTION CABLE LOGARITHMIC ANALOG OUTPUT XSTR DUAL SI NPN XSTR FET JNCT N CHANNEL RES RES RES RES RES RES RES RES VAR 100K 10 1 2W COMP 1M 5 1 4W COMP 1M 5 1 4W COMP 1M 5 1 4W MTL FILM 10K 1

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