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HP 6lIOA User's Manual

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1. 2 14 To mount a single unit in the rack panel proceed as follows a Boltrack mounting ears combining strips and angle brackets to each side of center spacing panels Angle brackets are placed be hind combining strips as shown in Figure 2 2 b Remove four screws from front panel of unit c Slide combining strips between front panel and case of unit d Bolt angle brackets to front sides of case and replace front panel screws 2 15 INPUT POWER REQUIREMENTS 2 16 This power supply is operated from a nominal 115 volt 60 Hz power source The input power re quired when operated from a 115 volt 60 Hz power Source at full load is Model 6110A 60 Watts Model 6516A 40 Watts 2 17 POWER CABLE 2 18 To protect operating personnel the National Electrical Manufacturers Association NEMA rec ommends that the instrument panel and cabinet be grounded This instrument is equipped with a three conductor power cable The third conductor is the ground conductor and when the cable is plugged into an appropriate receptacle the instru ment is grounded The offset pin on the power cable three prong connector is the ground connec tion 2 19 To preserve the protection feature when op erating the instrument from a two contact outlet use a three prong to two prong adapter and con nect the green lead on the adapter to ground 2 20 REPACKAGING FOR SHIPMENT 2 21 To insure safe shipment of the instrument it is recommended that the pa
2. 6 Gs Qs M muere 200V CR4 R27 28 IK CURRENT SAMPLING RESISTOR R66 CURRENT CAL 7 5 Yew R22 E uo e Vaw CURRENT zEgO ow METER CECOT me see eS R201 209 IK SPPM BY pa 219 loc 2 00v 300y 400v 4201 720V 309Yp22 229 29 73 234 500 7 SPPM Model 6110A Schematic Diagram
3. Paragraph 5 59 perform any necessary adjust ments and calibrations Paragraph 5 62 Before returning the power supply to normal operation repeat the performance check to ensure that the fault has been properly corrected and that no other faults exist Before doing any maintenance checks turn on power supply allow a half hour warm up and read the general information regard ing measurement techniques Paragraph 5 6 5 3 HIGH VOLTAGE PRECAUTIONS 5 4 With the supply operating normally and neither output grounded to the chassis there are many high voltage points within the chassis that are dangerous to personnel The potentials vary from several hundred to 3000 volts and are depend ent on the setting of the VOLTAGE thumbwheel switches Therefore always observe the follow ing caution CAUTION Connect the positive output to ground chassis before removing the covers to perform maintenance This reduces the number of internal points with dangerous potentials 5 5 With the positive terminal connected to chassis only the points illustrated in Figure 5 1 are at a high potential with respect to the chassis 5 6 MEASUREMENT TECHNIQUES 5 7 All measurements given in this manual are with a negative power supply output positive ter minal grounded to chassis When measuring per formance of the power supply it is important that the connection to the output terminal does not in troduce additional resistance For voltage mea
4. f Hewlett Packard Part Number g Recommended Spare Parts Quantity RS for complete maintenance of one instrument during one year of isolated service h Parts not identified by a reference desig nator are listed at the end of Table 6 4 under Me chanical and or Miscellaneous The former consists of parts belonging to and grouped by individual as semblies the latter consists of all parts not mediately associated with an assembly 6 3 ORDERING INFORMATION 6 4 order a replacement part address order or inquiry to your local Hewlett Packard sales office see lists at rear of this manual for addresses Specify tho following information for each part Model complete serial number and any Option or special modification J numbers of the instrument Hewlett Packard part number circuit reference des ignator and description To order a part not listed in Table 6 4 give complete description of the part its function nd its location Table 6 1 Reference Designators assembly miscellaneous blower fan electronic part capacitor fuse circuit breaker jack jumper diode relay device signal inductor ing lamp meter Table 6 1 Table 6 2 plug transistor resistor switch transformer terminal block thermal sw tch ampere altemating current assembly board bracket degree Centigrade card coefficient composition cathode ray tube center tapped direct curren
5. 4 19 The base of QIB is connected to ground through R2 Variable current can be injected at this point through R13 which serves t compensate for fixed voltage offsets in QI 4 20 Negative feedback 1s coupled from the out put of differential amplifier Q7 Q8 to the input of Ql by network R30 and C6 This feedback provides high frequency roll off in the loop gain to stabi lize the feedback loop 4 21 DRIVER AND ERROR AMPLIFIER 4 22 The driver and error amplifier circuit raises the level of the error signal from the constant voltage input circuit to a sufficient level to drive the series regulator Common emitter amplifier Q10 also receives a current limiting input when CR8 becomes forward biased 4 23 CURRENT LIMIT CIRCUIT 4 24 The output current flows through R23 produc ing voltage drop of 1 volt for 7 milliamps output current positive voltage appearing on R23 causes a current flow through R28 and selectable resistor R20 When the output current reaches 7 milliamps Q5 conducts forward biasing diode CR8 The base of Q10 becomes sufficiently nega tive to turn off 010 and series regulator Q11 thus limiting the output current R27 CR4 provide 0 7 volt bias for the emitter of Q5 The value of resistor R20 determines the level at which the out This value is normally selected for 7 milliamps output current Capacitor C5 and resistor R29 prevent oscillation in the cur rent limit mode of operation 4 25 H
6. Co and Howard B Jones Div Chicago Ill Dow Corning Corp Midland Mich Electro Motive Mfg Co Inc Willimantic Conn Dialight Corp Brooklyn N Y General Instrument Corp Newark N Drake Mfg Co Harwood Heights Ill Elastic Stop Nut Div of Amerace Esna Corp Union N J Brie Technological Products Inc Erie Pa Hart Mfg Go Hartford Conn Beckman Instruments Inc Helipot Div Fullerton Calif Fanwal Inc Ashland Mags Hughes Aircraft Co Electron Dynamics Div Torrance Calif Amperex Electronic Corp Hicksville N Y Bradley Semiconductor Corp New Haven Conn Carling Electric Inc Hartford Conn Federal Screw Products Inc Chicago Ill Heinemann Electric Co Trenton N J Hubbell Harvey Inc Bridgeport Conn Amphenol Corp Amphenol RF Div Danbury Conn E F Johnson Co Waseca Minn IRC Div of TRW Inc Philadelphia Pa Howard B Jones Div of Cinch M g Corp New York N Y Kurz and Kasch Inc Dayton Ohio Kilka Electric Corp Mt Vernon N Y Littlefuse Inc Des Plaines Minnesota Mining and Mfg Co St Paul Minn Minor Rubber Inc Bloomfield James Millen Mfg Co Inc Malden Mass 7 W Miiller Co Compton Calif Code 71785 assigned to Cinch Mfg Co Chicago Ill 6 3 Table 6 3 Code List of Manufacturers Continued CODE MANUFACTURER ADDRESS Cinch City of Industry Calif Oak Mfg Co Div of Oak Electro Netics Corp Crystal La
7. EIA rack Refer to Section II for details 14525A 1 17 INSTRUMENT IDENTIFICATION 1 18 Hewlett Packard power supplies are identi fied by a three part serial number tag The first part is the power supply model number The sec ond part is the serial number prefix which consists of a number letter combination that denotes the date of 4 Significant design change The number designates the year and the letter A through L designates the month January through December respectively The third part is the power supply serial number a different sequential number is signed to each power supply 1 19 If the serial number prefix on your power supply does not agree with the prefix on the title page of this manual use the change page that is included to update the manual to the proper serial number Where applicable backdating information is given in an appendix at the rear of the manual 1 20 ORDERING ADDITIONAL MANUALS 1 21 One manual is shipped with each power sup ply Additional manuals may be purchased from your local sales office see list at rear of this manual for addresses Specify the model number serial number prefix and stock number provided on the title page Table 1 1 OUTPUT 0 3000Vdc 0 6 milliamperes INPUT 115Vac 10 single phase 57 63Hz lA 50W LOAD REGULATION Less than 0 001 10ppm plus 100pV for a full load to no load change in output current LINE REGULATION Less th
8. between either output terminal and ground shall not exceed 4KVdc 1 11 SPECIFICATIONS 1 12 Detailed specifications for the power supply are given in Table 1 1 1 13 OPTIONS 1 14 Options are factory modifications of a stand ard instrument that are requested by the customer The following options are available for the instru ment covered by this manual Where necessary detailed option information operation alignment etc is included throughout the manual Option No Description 05 50Hz Input Modification Factory modification includes the substitution of 60Hz with 50Hz magnetic compo nent as indicated at the end of the parts list in Section VI In addition the overvoltage protection adjustment is rechecked refer to Section V 230Vac 10 Single Phase Input Factory modification includes the in stallation of 230 volt input trans former to replace the standard 115 volt transformers as ndicated at the rear of the parts list in Section VI 1 15 ACCESSORIES 1 16 The accessories listed in the following chart may be ordered with the power supply or separately from your local sales office Refer to list at rear of manual for addressas Additional informa tion on accessories is given in Section II d Part No 14515 Description Rack Kit f r Mounting one 54 H supply in a standard 19 EIA rack Refer to Section II f r details Rack Kit for mounting two 54 H supplies in a standard 19
9. C18 R40 50 mV less than 200nV C14 Neg 30 VR2 Cathode C14 Pos R43 Figure 5 10 Printed Circuit Board Location Diagram 3 Examine the following list to determine your symptom then check the probable cause Symptom Low Output no output voltage High output voltage Probable Cause Insure that the front panel meter is not defec tive then refer to para graph 5 57 Insure that the front panel meter is not defec tive then refer to para graph 5 57 CAUTION Never set the output voltage controls to zero volts when there is high or low output voltage damage to the volt age controls could result Erratic output voltage The needle on the out put voltage meter waiv ers slightly or an os cilloscope connected to the output displays er ratic ripple Inability to reach zero output voltage 1 mV Oscillates Meter needle pegs in current position Slow drift Random instability a Large output volt age transients output reductions of 1V or more Same as low output symp tom refer to paragraph 5 57 a Check output volt age zero adjustment paragraph 5 63 b Output voltage con trol R200 defective Differential ampli fier Q1 defective C6 C3 C8 C1 C2 C7 C13 or C14 defective CR19 defective or short between 12 4V and 2 1V supplies test point 16 to 24 a Measuring equipment Reference diode VRI c Q1 Q2 Q3 d Insufficient
10. If a component is replaced refer to the re pair and replacements and adjustment and calibra tion paragraphs in this section 5 55 OVERALL TROUBLESHOOTING PROCEDURE 5 56 To locate the cause of trouble follow steps 1 2 and 3 in sequence CAUTION Connect the positive output to ground chassis before troubleshooting with the supply turned on This reduces the number of internal points w th dan gerous potentials to those indicated in Figure 5 1 1 Check for obvious troubles such as open fuse defective power cord input power failure or defective voltage or current meter Next remove the top and bottom covers each held by four re taining screws and inspect for open connections charred components etc If the trouble source cannot be detected by visual inspection proceed with step 2 2 In almost all cases the trouble can be caused by the DC bias or reference voltages thus itis a good practice to check voltages in Table 5 2 before proceeding with step 3 Bias Reference and Rectifier Voltages Refer to Figure 5 10 for test point locations Meter Positive Meter Step I Common 1 15 S Cl4 neg 4 8 C14 neg C14 positive S C14 nea 30 VR2 cathode C14 negative 34 R43 36 11 36 22 jig Normal Probable Ripple P P Cause 17 5 CR26 CR27 CR28 C17 CR10 R41 Q12 Q13 Q14 less than SOV VRI R49 less than 100hV VR2 0 4V CR24 CR28 C16 1V CR29 CR30 C19 R54 6V CR33 CR36
11. au 1 Gn 1 Introduction 3 High Voltage Precautions 6 Measurement Techniques 9 1 1 I on amp n I Test Equipment Required 1 1 f 1 Performance Test 4 Rated Output Meter and Output Controls Accuracy Load Regulation Line Regulation Ripple and Noise Transient Recovery Time Output Impedance Temperature Coefficient Output Stability Current Limit Troubleshooting Overall Troubleshooting bo 1 BO bh ro M ko 1 BJ b O TALLATION Initia Inspection Mechanical Check Electrical Check Installation Data Location Rack Mounting Input Power Requirements Power Cable Repackaging for Shipment 5 5 Se 5 5 1 1 1 1 i Cn t n n in 5 tD OD OD oO d Q4 C2 Co s i O23 Co 1 PERATING INSTRUCTIONS 1 Turn on Check Out Procedure 3 Operation Procedure 5 9 5 Current Limit Provisions Repair and Replacement 5 15 7 Operation of Supply Beyond 5 61 Adjustment and Calibration 5 17 5 63 Output Voltage Zero and Tracking 5 17 5 65 Meter Mechanical Zero 5 17 5 67 Voltmeter Tracking 5 17 5 69 Ammeter Zero 5 17 5 71 Ammeter Tracking 5 17 5 73 Overvoltage Protection IV PRINCIPLES OF OPERATION 5 75 Oven Control Circult 4 1 Overall Block Diagram 5 77 Current Limit Adjustment Discussion 4 8 Simplified Sche
12. comp 1 5 iw R28 32 43 fxd comp 10K 5 iw R30 fxd comp 5 1Ka amp 5 R31 fxd comp 3 5 FW R34 fxd comp 7 5K 5 iw R35 fxd comp 15Kn 5 4w R36 fxd comp 100K 5 lw R37 fxd comp 104 5 iw R38 fxd comp 3Ka 45 4w R39 fxd met ox 3004 amp 5 2w R40 fxd ww 30Kn 5 10w R41 52 61 fxd comp 200 5 lw fxd comp 4 5 iw fxd comp 1 5Ka 596 iw fxd comp 2 7Ka amp 5 Zw fxd met film 1 5Ka 1 1 8w fxd ww 714n 1 4w TC 20ppm R53 60 fxd comp 5104 5 iw R54 fxd comp 100 5 lw R55 72 fxd comp 33Kn 5 R57 Thermistor 100K 1096 oven ass y R58 fxd comp 2Ka 5 w R59 fxd comp 6804 596 Ew R64 fxd comp 3 6 MEG 5 R65 var ww lKa Modify R66 fxd met film 7 80K4 2 196 1 8 R68 fxd met film 390Ka 1 1 8w R69 79 fxd ww 50 5 Sw R71 var ww 25Xa R C 0698 5090 0686 3005 Type MF6C T O Electra 0757 0344 1 100 2100 0896 HLAB 0811 1929 HLAB 0811 1942 Type E20 R C L 0811 1976 Type EB EFO 0698 5680 MP5C T O Electra 0757 0483 MF6C T O Electra 0757 0167 EB 8235 0686 8235 Series 70 5 2100 0095 EB 2245 0686 2245 FR C gt e qm ob E 0686 1028 0686 1035 0686 5125 0686 3925 0686 7525 0686 1535 0686 1045 0686 1005 0686 3025 0698 3630 0811 1918 1025 EB 1035 5125 3925 EB
13. measured end the reference voltage will have the required re solution for the measurement being made The voltage difference will be a function of the null detector that is used Exemples of satisfactory null detectors are 419A null detector a dc coupled oscilloscope utilizing differential input or 50mV meter movement with a 100 division scale the latter a 2mV change in voltage will result in meter deflection of four divisions POWER SUPPLY UNDER TEST REFERENCE VOLTAGE SOURCE NULL DETECTOR Figure 5 2 Differential Voltmeter Substitute Test Setup CAUTION Care must be exercised when using an elec tronic null detector in which one input termi nal is grounded to avoid ground loops and circulating currents 5 11 PERFORMANCE TEST 5 12 The following test can be used as an incom ing inspection check and appropriate portions of the test can be repeated either to check the oper ation of the instrument after repairs or for periodic preventive maintenance tests 5 13 The performance check is made using a 115 volt 60 Hz cps single phase input power source The performance check is normally made at a constant ambient room temperature The tem perature range Specification can be verified by doing the performance check except temperature stability check at a controlled temperature of 00C and at a controlled temperature of 500C If the correct result is not obtained for a particular check do not adjus
14. output is used as Stable bias source Diode CR19 provides ini tial start up for the reference circuit when the power supply is first turned on 4 37 METER CIRCUIT 4 38 The mater circuit provides continuous indi cations of output voltage or current on a single meter The meter can be used as either a volt meter or an ammeter depending upon the position of METER switch 82 on the front panel of the supply In the VOLTS position R68 and R21 form a 38 to 1 voltage divider and the meter is connected through voltage calibrate potentiometer R67 Volt age calibrate potentiometer R67 is adjusted for proper full scale meter deflection in the voltage range 4 39 With meter switch 52 in the AMPS position the meter is connected through R66 and R65 across the current sampling resistor R23 After the meter has been mechanically zeroed and with the power Supply turned off current zero potentiometer R25 is amp djusted until the meter needle rests on zero Current calibrate potentiometer R65 is adjusted for full scale meter deflection in the current range SECTION V MAINTENANCE 5 1 INTRODUCTION 5 2 Upon receipt of the power supply the per formance check Paragraph 5 11 should be made This check is suitable for incoming inspection If a fault is detected in the power supply while mak ing the performance check or during normal opera tion proceed to the troubleshooting procedures Paragraph 5 51 After troubleshooting and repair
15. terminals 4 Notice that the shields of the power supply end of the two coax cables are not con nected to the power supply ground since such a connection would give rise to a ground current path through the coax shield resulting in an er roneous measurement 5 The measured noise spike values must be doubled since the impedance matching resis tors constitute a 2 to 1 attenuator 6 The noise spikes observed on the oscil loscope should be less than 0 5mV 5 34 circuit of Figure 5 6 also be used for the normal measurement of low frequency ripple and noise simply remove the four terminat ing resistors and the biocking Capacitors and sub Stitute a higher gain vertical plug in in place of the wide band plug in required for spike measure ments Notice that with these changes Figure 5 6 becomes a two cable version of Figure 5 4C TRANSIENT RECOVERY TIME Definition The time X for output voltage recovery to within Y mil livolts of the nom nal output volt age following a Z amp step change in load current where Y is specified separately for each model but is generally of the same order as the load regulation speci fication The nominal output volt age is defined as the DC level half way between the static output volt age before and after the imposed load change and Z is the specified load current change normally equal to the full load current rating of the supply 5 36 Transient recov
16. warm up time should be 30 min utes Oven control circuit defective or misadjusted refer to paragraph 5 75 High voltage control circuit defective Refer to Table 5 3 step 9 High voltage control circuit defective Refer to Table 5 4 step 9 b Large output volt age transients output increases of 1V or more Small output volt age transients output changes of 10 30 mV VRI defective voltage thumbwheel switches noisy 1V thumbwheel control R200 noisy High Ripple a Check operating set up for ground loops b If output floating connect luf capacitor between output and ground c Check for excessive internal ripple refer to Table 5 2 d Ensure that supply is not current limiting under loaded conditions Check that test point 21 1s approx 12V Current limit circuit de fective or misadjusted refer to paragraph 5 77 C6 C3 C8 C1 C2 C9 C13 or C14 defective Poor Transient Recov ery Time Output Voltage In a accuracy Set output voltage controls to zero Out put voltage should read OV 10mV if not per form adjustment given in paragraph 5 63 b Slowly rotate each thumbwheel switch a step ata time and rec ord the output voltage The step changes should be within 0 1 A daviation in any stap indicates that the asso elated resistor is defec tive 5 57 Regulating Loop Troubles If the voltages in Table 5 2 have been checked to eliminate the reference bias and
17. 0 Output terminals are provided on the front panel of the power supply mating connectors are UG 932 and cable type is RG 59 U The positive or negative output terminal may be grounded by shorting the center pin and case of the applicable UG 931 U jack or both output terminals unground ed floating operation Floating operation is per mitted to 1 000 volts dc off ground neither output terminal should exceed 4 000 volts dc The best ripple free results are obtained when one output jack is grounded and the load is connected to the other output jack by the appropriate cable and con nector WARNING To avoid injury to personnel du to arc ing turn off the power supply before connecting or disconnecting the load connectors 3 11 Each load should be connected to the power Supply output terminals using separate pairs of connecting wires This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply Each pair of connecting wires should be as short possible to reduce noise pickup In addition a 0 1 to 1 Of capacitor should be con nected between one terminal and the chassis if the supply is floated off of ground 3 12 If load considerations require that the output power distribution terminals be remotely located from the power supply then the power supply out put terminals should be connected to the remote distribution terminals via a pair of shield
18. 0vdc NOT ASSIGNED fxd elect 20uf 50vdc fxd elect 325uf 35vde fxd elect 10uf 450vdc fxd elect 20hf 200vdc fxd film 0 00225 200vdc fxd elect luf 4000vdc fxd ceramic 0 02uf 600vdc fxd paper luf 2000vdc Rect si Diode Rect si Vg 2 4 100 200ma 180prv Rect si 500ma 200prv NOT ASSIGNED Rect si 400ma 800prv SCR 50 50fbv Rect si 900ma 400prv SCR 150pri 150 Voltage Doubler s Lamp neon part of si ass y Fuse cartridge 2 9 250v 3AG STRAP Coil Line inductor Inductor pair Diff Amp NPN oven ass y 55 NPN si oven ass y NOT ASSIGNED SS NPN si 55 PNP si SS NPN si MP NPN s 55 PNP si Uni Junction si ta NEE NEF eRe Pee eee E M I Ref 1 192 10492 192P33392 268P10 192P22392 192P47292 192P68392 192P2249R8 D28708 192P10292 30D206G050DC4 D34656 D38267 34D206F200rJA4 192 22292 P49991 D 02 264 90 1N485 1N4828 1N483B 1N3253 1N3256 C6F 1N5060 312002 635492 2N4045 4TX16A1014 2N3391 MPS6517 2N3417 40422 40362 eN2646 Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Sprague Erie Sprague Sylvania G E G E Littlefuse HLAB HLAB Union Carbide G E otorola VA E t E QC 93332 03508 03508 02735 02735 03508 0350
19. 1 Q2 Q3 or associated circuitry inside oven housing To check the high voltage control circuit set the Output VOLTAGE controls to 900V and re move the jumpers from L4 L5 and C18 C28 Proceed with step 8 NOTE Waveforms that indicate normal operation of the high voltage control circuit under various line and load conditions are shown on the schematic diagram at the rear of the manual Table 5 4 High Output Voltage Troubleshooting Continued Step Response Probable Cause Connect the oscilloscope a CR39 or R77 open between test point 36 P and out Set the oscil c loscope f r dc coupled LUN Tl control windin 9 Li illl b or CRS open terminals 5 7 open Resistance between Hy collect of and Tl term 6 should F 259a Resistance i between collector of 69 ro CR40 and T1 term 6 2O0V CM 10 8 should be 284 R76 or Q17 open The waveform above in or not firing dicates a normal condi tion Note that the highest peak does not reach zero volts TR GITE 20V CM lOmS CM The waveform above is indicative of high out put voltage Note that the peaks reach and are clipped at zero volts Extremely high output voltage produces a waveform that is com pressed at zero volts 5 59 REPAIR AND REPLACEMENT refer to Figure 5 11 which describes the basic techniques
20. 20 1126 1460 0720 4040 0295 2190 0016 0370 0084 1205 0033 Reference De signator Line cord plug PH 151 74 1 KH 4096 Beldon 70903 8120 0050 Strain relief bushing SR 5FP 1 Heyco 28520 0400 0013 BNC HV Cable Plug Body Assembly Only Center Contact Clamp Nut Clamp Washer Clamp Gasket Flat Washer Lockwasher Nut Rubber bumper Rubber bumper Fastener Fastener Cable Clamp Fastener 12651 1 Dage 95712 1250 0741 1 026 9 Dage 95712 1250 0742 834 32 95712 1250 0142 832 2 Dage 95712 1250 0143 833 13 95712 1250 0145 2053 6 Dage 98712 1250 0146 1224 08 Shakeproof 78189 2190 0037 903 12 Littlefuse 75915 2950 0038 4072 Stockwell 87575 0403 0086 MB 50 Stockwell 87575 0403 0088 C8091 632 24B Tinnerman 89032 0510 0275 C8022 632 4 Tinnerman 89032 4 4 Whitehead 79307 1400 0330 C 8082 832 1 Tinnerman 89032 POM ghe eR p dS B3 LS og BS ES DB r OPTION 05 L3 Line Inductor HLAB 09182 9100 2148 OPTION 18 L3 Lina Inductor 09182 9100 2149 R55 fxd comp 120K amp 5 lw 01121 0686 1245 1 Power Transformer 09182 9100 2138 T2 Bias Transformer 09182 9100 2139 OPTIONS 05 AND 18 L3 Line Inductor 9100 2140 R55 ixd comp 120 5 lw 0686 1245 Power Transformer 9100 2138 72 Bias Transformer 9100 2140 APPENDIX I MANUAL BACKDATING CHANGES Manual backdating changes describe changes necessary to adapt this manual to earlier instruments To adapt the
21. 7525 1535 1045 1005 EB 3025 Type C425 Type 10XM OPP PPP PP PP ee I Bet RM d n op 5 ps 0686 2015 0686 4325 0686 1525 0686 2725 0757 0427 0811 1935 0585 5115 0689 1045 0686 3335 EB 2015 EB 4325 EB 1525 2725 5 T O tps 2 mw www EB 5115 GB 1045 3335 DO B F3 eee qs H pz deb per og ps wu 0837 0026 0686 2025 EB 6815 0686 6815 EB 3645 B 0686 3645 Type 110 F4 8 2100 0391 Type T O Electra 0757 0440 5 T O Electra 0698 5093 Type 5 W L 0811 1854 Serias 70 C T S 2100 1534 SITG4 2025 gt gt gt mom 5 pO F3 d Ree HH Reference Designator R7 R7 R7 51 52 53 3 fxd comp 51Ka 5 iw fxd comp 8 2Ka 5 4w 7 78 fxd comp 200Kn amp 5 Switch pilot lt red COMB Switch Rotary Thumbwheel Assembly High Voltage Board 231 234 fxd ww 500Ka 1 5 ppm 9 C Board Ass y No 2 L to R R221 R229 fxd ww 100Ka 1 5 P C Board Ass y No 3 L to R R211 R219 fxd ww 10 1 5 ppm 9C P C Board Ass y No 4 L to R R201 R209 fxd ww lKa 1 5 ppm 9C Pot Board Ass y Deck No 5 L to R Power Transformer Bias Transformer Zener 6 2V 45 250MW oven ass
22. 8 03508 09182 09182 75915 09182 09182 09182 22229 03508 03508 04713 03508 02735 02735 03508 0160 0168 0160 0163 0160 2596 0160 0162 0160 0157 0160 0166 0160 2453 0180 0300 0160 0153 0180 0049 0180 0332 0180 1944 0180 0367 0160 0154 0160 2580 0150 0024 0160 2483 1901 0033 1901 0461 1901 0460 1901 0389 1901 0388 1884 0033 1901 0328 1884 0038 1901 0084 2140 0244 2110 0002 9100 1854 9100 1813 9100 1814 1854 0221 1854 0071 1854 0071 1853 0099 1884 0087 1854 0253 1853 0041 1855 0010 A L3 E qp p pg Reference Mir Part Description fxd ww lKa 5 3w 242E1025 Sprague 0813 0001 fxd met film 221Ka 1 1 8w oven ass y Type CEA T O LR C 0757 0473 fxd met film 27 4K 1 8w oven ass y Type CEA T O 0757 0452 fxd met film 432K4 1 1 8w oven ass y Type CEA T O 0757 0480 R7 8 fxd met film 43Ka 1 Lew oven ass y Type CEA T O 1 R9 fxd comp 304 amp 5 iw EB 3008 R10 12 42 90 51 NOT ASSIGNED R13 15 fxd film 1 MEGa 196 2 R14 16 var ww 15 45 IW 50 C R17 fxd ww 297 1 TC 20ppm R18 fxd ww 4 9K 1 amp 5ppm C R19 fxd ww lKa 1 2 5ppm R20 56 fxd comp SELECTED 5 5 R21 fxd comp 31 MEG 10 4w R22 fxd met film 562K 41 V 8w R23 fxd met film 143 1 w R24 fxd comp 82K 5 dw R25 67 var ww 100Ka R26 fxd comp 220K 5 w R27 29 33 62 63 70 75 fxd
23. Grove Ill Amphenol Corp Broadview Radio Corp of America Solid State and Receiving Tube Div Somerville N J G E Semiconductor Products Dept Syracuse NY Eldema Corp Compton Calif Transitron Electronic Corp Wakefield Mass Pyrofilm Resistor Co Inc Cedar Knolls N J Arrow Hart and Hegeman Electric Co Hartford Conn ADC Electronics Inc Harbor City Calif Caddell amp Burns Mfg Co Inc Mineola N Y Hewlett Packard Co Palo Alto Div Palo Alto Calif Motorola Semiconductor Prod Inc Phoenix Arizona Westinghouse Electric Corp Semiconductor Dept Youngwood Pa Ultronix Inc Grand Junction Colo Wakefield Enar Inc Wakefield Mass General Elect Electronic Capacitor amp Battery Dept Irmo 5 Bassik Div Stewart Warner Corp Bridgeport Conn IRC Div of TRW Inc Semiconductor Plant Lynn Mass Amatom Electronic Hardware Inc New Rochelie N Y Beede Electrical Instrument Co Penacook N H General Devices Co Inc Indianapol s Ind Semcor Div Components Inc Phoenix Arizona Robinson Nugant Inc New Albany Ind Torrington Mfg Co West Div i Van Nuys Calif Transistor Electronics Corp Minneapolis Minn CODE NO Code List of Manufacturers MANUFACTURER ADDRESS Westinghouse Electric Corp Electronic Tube Div Elmira N Y Fairchild Camera and Instrument Corp Semiconductor Div Mountain View Calif Birteher Corp The Los Angeles Calif Sylvania El
24. HEWLETT PACKARD DC POWER SUPPLY STB SERIES MODEL 6110A SERIAL NUMBER PREFIX 6E FOR REFERENCE PURPOSES ONLY Printed May 1967 Stock Number 06110 90001 COPYRIGHT AND DISCLAIMER NOTICE Copyright Agilent Technologies Inc Reproduced with the permission of Agilent Technologies Inc Agilent Technologies Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent Technologies Inc is not liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material or data MANUAL CHANGES Model 6110 DC Power Supply Manual HP Part No 06110 90001 Make all corrections in the manual according to errata below then check the following table for your power supply serial number and enter any listed change s in the manual MAKE CHANGES SERIAL 0213 0512 1 0513 0667 1 2 Errata 0668 0717 1 2 3 0718 0742 1 2 3 4 0743 0842 1 thru 0843 0932 l thru 6 0933 1447 1 thru 7 1448 1507 1 thru 8 1578 up 1 thru 9 CHANGE 1 In the Replaceable Parts Table change R76 from 8 2Kn to 4 3Ka 5 ZW HP Part No 0686 4325 A B 01121 CHANGE 2 In Replaceable Parts List make the following changes C18 Change to HP Part No 0180 2256 R201 thru R209 Change to 1Ka 81 iW HP Part No 0811 2770 P C Board C
25. IGH VOLTAGE CONTROL AND DOUBLER CIRCUITS 4 26 This circuit controls the voltage output of the high voltage doubler as a function of the volt age across the series regulator and resistor R54 When the voltage across the series regulator rises to a predetermined value CR39 becomes forward biased and 017 conducts Diodes and CRS are forward biased and on alternate half cycles SCR s CR7 and CR40 fire shorting the control wind ing of transformer Tl This action decreases the voltage the secondary of 1 thus reducing the charge on capacitors C27 and C28 This in turn reduces the voltage drop across the series regula tor 4 27 When the voltage drop across the series reg ulator decreases to predetermined amount diode CR39 becomes reversed biased Q17 turns off This action reverse biases diodes and CR5 and the SCR s cease firing on alternate half cycles The output of the high voltage doubler rises until Q17 again begins to conduct 4 28 Diodes and CR5 form an OR gate that prevents the interaction of SCR s CR and 40 For example when CR7 fires positive pulse appears on its gate back biasing CR3 and preventing this positive pulse from tripping CR40 Two RFI filters the control winding of transformer prevent spikes from being transferred to the high voltage doubler and the ac input line These filters con sist of C29 R61 L4 C26 R74 and L5 Diode CR39 protects the base of transi
26. OR VOLTAGE INPUT THUMBWHEEL SWITCH ASSY RI CONSTANT VOLTAGE PULLOUT RESISTOR Figure 4 2 Simplified Schematic Diagram 4 8 SIMPLIFIED SCHEMATIC DISCUSSION Figure 4 2 4 9 The regulating feedback loop consisting of the thumbwheel switch assembly programming re sistors voltage input circuit driver and error amplifier series regulator and high voltage con trol circuit function continuously to maintain the output voltage constant during constant voltage Operation and the output current at a safe limit during current limit operation 4 10 The voltage input circuit differential ampli fier Q1 detects an error voltage that is propor tional to the difference between the voltage across its programming resistors thumbwheel switch as sembly and the dc output voltage The error sig nal is amplified by differential amplifiers Q2 Q3 and Q7 Q8 The amplified error signal is further amplified by Q9 and Q10 and applied to the series regulator The series regulator increases or de creases the output current as required to maintain a constant dc output voltage that is equal to the programmed voltage The high voltage control cir cuit transformer Tl and the high voltage doubler maintain the voltage across the series regulator within a limited range When the voltage across the series regulator falls below a predetermined level Q17 turns on forward biasing diodes CR3 and 5 SCR s CR7 and CR40 begin firing on e
27. RRENT LIMIT ADJUSTMENT 5 78 The following procedure determines the value of the short circuit output current limit a Adjust the output VOLTAGE thumbwheel switches for 2V b Connect a decade resistance box in place of resistor R20 and sat the resistance to 500K c Short the output terminals and turn on the supply d Adjust the decade resistance slightly to eliminate oscillations singing Solder nearest value watt carbon com position resistor determined in step 1 across R20 terminals After cooling recheck to ensure no oscillations singing f To check the current limit level c n nect a multimeter or milliameter to the output ter minals and turn n the supply The meter indica tion should be approximately 8mA SECTION VI REPLACEABLE PARTS 6 1 INTRODUCTION 6 2 This section contains information for ordering replacement parts Table 6 4 lists parts in alpha numeric order by reference designators and provides the follewing information a Reference Designators Refer to Table 6 1 b Description Refer to Table 6 2 for ab breviations c Total Quantity TQ Given only the first time the part number is listed except in instruments containing many sub modular assemblies in which case the TQ appears the first time the part number is listed in each assembly d Manufacturer s Part Number or Type e Manufacturer s Federal Supply Code Num ber Refer to Table 6 3 for manufacturer s name and address
28. SUPPLY L fe LOW VOLTAGE OFFSET 15 280V look DRIVER ERROR F PROTECTION CIRCUIT XC 179 9 RTI a 25K OVER VOLTAG CONTROL WINDING CA 2 pid OVEN CONTROL CIRCUIT REFERE 4 VOLTAGE INPUT CIRCUIT EMITTER R FOLLOWER 27 R37 1 amp 4 4 10 ORIVER CE2 5 clo R39 2045 lt pac 3004 16 ZW ook DRIVER 1 ERROR NC iav 424 AMPLIFIER ER aR 5 2 hemmanen leion l CR 39 ROTECTION CIRCUIT NOTES Co 79 1 200K 24 2 Au V4w 4 Yaw BesisToR 17 0012 4 72 d 271 4 200v 53K R77 ALL ARE lw 97 UNLESS OTHE IN TOLEZAN 3 PENOTES VOLTAGES FEEDBACK 5 4 DENOTES CUBRENT FEEDBACK gt DC VOLTAGES WERE MEASUZED UNDER THE A SIMPSON MODEL 260 OQ EGQUIVACENT SYAC INPUT C VOLTAGES BEFERENCED TO 5 UNLESS D VOLTAGES TYPICAL E 9 OVEN ASSEMBLY 25K OVER VOLTAGE c UNLESS C COMPONENTS ARE IDENT fv GE 412 44 RIG mes ISK 4 VOLTAG 1 CONTRO 9 4N CAL 5 UNLESS OTHERWISE NOTED RE 175 IN TOLERANCE TAGE FEEDBACK SIGNAL FEEDBACK SIGNAL ASUCED UNDER THE FOLLOWING CONDITIONS oO OR EQUIVALENT TO 5 UNLESS or eQGQwise NOTED CAL 710 UNLESS OTHERWISE NOTED ON ENTS AZE IDENTIFIED BY SHADED AREAS 412 4 34Y 94 20 te 1 R20 110 l2V
29. Wire Corp Stemco Controls Div Mansfield Ohio Raytheon Co Components Div Ind Components Oper Quincy Mass Wagner Electric Corp Tung Sol Div Radio Materials Co Augat Inc Livingston N J Southeo Inc Lester Pa Leecraft Mfg Co Inc LLGC N Y Methode Mfg Co Rolling Meadows IIL Bendix Corp Microwave Devices Diy Weckesser o Ine Amphenol Corp Amphenol Controls Div Janesville Wis Industrial Retaining Ring Co Irvington N J IMC Magnetics Corp Eastem Div Westbury N Y Sealectro Corp Mamaroneck N Y ETO Inc Cleveland Ohio International Electronic Research Corp Burbank Calif Boston Mass Franklin Ind Chicago Ill Renbrandt Inc Mfr Part Mfr Stock No RS Reference Designator Description Quantit Cl fxd elect luf 35vdc 1 C2 B 26 1500105 9035 2 Sprague 0180 0291 29 C3 13 21 C4 CS C7 c9 C10 Cll C12 C14 16 17 C18 C19 C20 24 C23 G25 C27 28 CR1 5 8 9 12 14 16 19 39 CR6 CR10 13 20 CR11 24 28 32 CR15 17 18 21 23 CR29 30 CR31 CR33 38 CR40 7 CRAL DS1 Fl 11 2 13 L4 Q1 Q2 3 Q4 6 Q5 9 13 15 17 Q7 8 Q10 Q11 Q12 O16 fxd film 0 luf 200vdc fxd film 0 200vdc fxd film paper glass case 0 1 4 000vdc fxd film 0 022 1 200vdc fxd elect 0 00474 200vdc fxd elect 0 06851 200vdc fxd film 0 22uf 80vdc fxd elect 204 15vdc fxd film 0 O01pf 20
30. a Calif Palo Alto Calif Kenilworth N J Hewlett Packard Co Heyman Mfg Co IMC Magnetics Corp New Hampshire Div Rochester SAE Advance Packaging Inc Santa Ana Calif Ramona Calif Owensboro Ky Chicago Budwig Mfg Co Go Tube Dept Lectrohm Inc P R Mallory amp Co Inc indianapolis Ind Muter Co Chicago Ill New Departure Hyatt Bearings Div General Motors Corp Sandusky Ohio Ohmite Manufacturing Co Skokie Ill Penn Engr and Mfg Corp Doylestown Pa Polaroid Gorp Cambridge Mass Raytheon Go Lexington Mass Simpson Electric Div of American Gage and Machine Chicago Ill Sprague Electric North Adams Mass Superior Electric Bristol Conn Syntron Div of FMC Corp Homer City Pa Thomas and Betts Co Phitadeiphia Pa Union Carbide Corp New York N Y Ward Leonard Electric Co Mt Vernon N Y CODE MANUFACTURER ADDRESS Amperite Co Inc Union City N J Beemer ngrg Co Fort Washington Pa Belden Corp Chicago Ill Bud Radio Inc Willoughby Ohio Cambridge Thermionic Corp Cambridge Mass Bussmann Mfg Div of McGraw amp Edison Co St Louis Mo CTS Corp Elkhart Ind I T Cannon Electric Inc Los Angeles Calif Globe Union Inc Gentralab Div Milwaukee Wis General Cable Corp Cornish Wire Co Div Williamstown Mass Coto Coll Co Inc Providence Chicago Miniature Lamp Works Chicago Ill Cinch Mfg
31. ach cycle and the voltage across C27 and G28 decays When the voltage across the series regu lator rises above a predetermined level Q17 turns off reverse biasing diodes and CR5 SCR s CR7 and CR40 stop firing and the voltage across C27 and C28 rises 4 11 The current limit circuit protects the load and the series regulator against excessive currents If the external load resistance is decreased to a point where the load current exceeds the value selected by resistor R20 the negative voltage on the collec tor of Q5 forward biases Thus the collector of Q9 is clamped and the output current is main tained at a constant safe maximum Any further decreases in load resistance cause the output volt age to decrease proportionally 4 12 DETAILED CIRCUIT ANALYSIS Refer to over all schematic at rear of manual 4 13 SERIES REGULATOR 4 14 The series regulator consists of transistor stage O11 The regulator serves as a series con trol element by altering its conduction so that the output voltage and current limit is never exceeded The conduction of Q11 is controlled by the feed back voltage obtained from driver 010 4 15 CONSTANT VOLTAGE INPUT CIRCUIT 4 16 This circuit consists of voltage decade con trol R200 through R235 voltage calibrate potenti ometer R16 and differential amplifiers Ql Q2 Q3 and Q7 Q8 Ql consists of two transistors having closely matched characteristics in a single tran sistor package This p
32. ackage insures that both transistors will operate at essentially the same temperature minimizing drift due to thermal differ entials 01 02 and Q3 are enclosed in a c n Stant temperature oven to further minimize effects of changing ambient temperature 4 17 The constant voltage input circuit continu ously compares 4 fixed reference voltage with a portion of the output voltage and if a difference exists produces an error voltage whose amplitude and phase is proportional to the difference The error output is fed back to the series regulator through the error and driver amplifiers The error voltage changes the conduction of the series reg ulat r which in turn alters the output voltage so that the difference between the two input voltages put current will be limited applied to the differential amplifier is reduced to zero The above action maintains the output vott age constant 4 18 The base of Q1A is connected to the junction of the programming resistors and the current pull out resistor R17 through a current limiting resis tor Diodes and CR2 limit voltage excur sions on the base of Q1A Rl limits the current through the pr gramming resistors under the con dition of rapid voltage turn down Capacitors C4 and C9 shunt the programming resistors to increase the high frequency gain of the amplifier The pro gramming current 1s determined primarily by the reference voltage and the pull out resistor R17
33. an 0 001 10 output voltage change for a 10 change in line voltage RIPPLE AND NOISE Less than 400yVrms TEMPERATURE RANGES Operating 0 to 509C Storage 20to 8596 TEMPERATURE COEFFICIENT Less than 0 001 10ppm plus 50yV output volt age change per C after 30 minute warm up STABILITY Less than 0 01 plus 500uV total drift for 8 hours less than 0 012 plus 600 V for 1 month after 30 minute warm up and with 39C ambient variation OUTPUT IMPEDANCE At 3000V less than 50 ohms from DC to 1000Hz At less than 0 05 ohm from DC to 100Hz TRANSIENT RECOVERY TIME Less than 50 seconds is required for output voltage to recover to within 10 millivolts of the nominal output voltage following a full load change in output current Less than 100u seconds is required for output voltage recovery to within the load regulation specification The nominal Output voltage is defined as the mean between the Specifications no load and full load voltage OVERLOAD PROTECTION An all electronic continuously acting current limit protects the power supply for all overloads regardiess of how long imposed including a di rect short circuit across the output terminals CONTROLS An in line 5 digit thumbwheel voltage program mer permits control of the output voltage with an accuracy of 0 1 plus 100mV of the output volt age resolution is 1mV METER The front panel meter can be used as eithe
34. arity and the serics regulator will never be called upon to withstand a voltage strain greater than 200 volts from its own rectifier 4 4 The ac input line voltage s raised to the proper level and coupled to the piggy back sup ply This supply converts the input to raw dc which is fed to the positive terminal via the series regulator and current sampling resistor network The regulator pari of the feedback loop is made to alter its conduction to maintain a constant out put voltage or limit the output current Voltage developed across the current sampling resistor is the input to the current limiting circuit If the out put current that passes through the sampling net work exceeds a certain predetermined level the current limiting circuit applies a feedback signal to the series regulator which alters the regulator s conduction so that the output current does not ex ceed the predetermined limit 4 5 The voltage input circuit obtains its input by sampling the output voltage of the supply at the voltage control Any changes in output voltage are detected in the constant voltage input circuit am plified by the error amplifier and driver and plied to the series regulator in the correct phase and amplitude to counteract the change in output voltage The reference regulator circuit provides stable reference voltages which are used by the constant voltage input circuit and the current limi ting circuit for comparison purp
35. ate plastic disc clockwise cw until meter reads zero then rotate ccw slightly in order to free adjustment screw from meter suspension If pointer moves repeat steps b and c 5 67 VOLTMETER TRACKING 5 68 To calibrate the voltmeter tracking proceed as follows a Set the METER switch to VOLTS position and turn on the supply b Adjust the power supply VOLTAGE con trols for 3000Vdc Adjust VOLT CAL control R67 until the meter indicates exactly 3000Vdc 5 69 AMMETER ZERO 5 70 To electrically zero the ammeter proceed follows Set the METER switch to AMPS position and turn on the supply b Adjust the power supply VOLTAGE con trols for 3000Vdc C Adjust CURRENT ZERO control R25 for Zero output Current on front panel meter 5 71 AMMETER TRACKING 5 72 To calibrate the ammeter tracking proceed as follows a Connect 500K 18W load resistor across the power supply output terminals b Set the METER switch to AMPS position and turn on the supply Adjust the power supply VOLTAGE con trols for 3000Vdc Adjust the CURRENT CAL control R65 until the front panel ammeter indicates 6mA 5 73 OVERVOLTAGE PROTECTION 5 74 To adjust the overvoltage protection feature so that the output voltage will not exceed 3000V under any circumstances proceed as follows a Connect a 500K 18W load resistor to the output of the supply connect Variac to the input b Turn on the power supply and adj
36. can be used in lieu of the tee connectors providing that all connections are made directly to the power supply and lead lengths are short b Adjust front panel VOLTAGE thumbwheel switches until the front panel voltmeter indicates 200Vde Set AMPLITUDE control on oscillator to 10 volts and FREQUENCY control to 1000 Hz cps d Record voltage across output terminals of the supply as indicated on AC voltmeter e Calculate the output impedance by tha following formula Z out EOR Ein EO where rms voltage across power supply output terminals 1000 ohms Ein 10 volts f The output impedance Zout should be less than 50 ohms 5 42 TEMPERATURE COEFFICIENT Definition The change in output voltage per degree Centigrade change in the ambient temperature under conditions of constant in put AC line voltage output volt age setting and load resistance 5 43 The temperature coefficient of a power sup ply is measured by placing the power supply in an oven and varying it over any temperature span within rating Most di power supplies are rated for operation from 09 to 50 C The power supply must be allowed to thermally stabilize for 4 sufficient period of time at each temperature of measurement 5 44 The temperature coefficient specified is the maximum temperature dependent output voltage change which will result over any 5 C interval The differential voltmeter or digital vol
37. ckage designed for the instrument be used The original packaging mate rial is reusable If it is not available contact your tocal Hewlett Packard field office to obtain the materials This office will also furnish the address of the nearest service office to which the instrument can be shipped Be sure to attach a tag to the instrument which specifies the owner model number full serial number and service re quired or a brief description of the trouble SECTION III OPERATING INSTRUCTIONS 3 1 TURN ON CHECK OUT PROCEDURE 3 2 The following procedure describes the use of the front panel controls and indicators illustrated in Figure 3 1 and insures that the power supply is operational HARRISON DCPOWER SUPPLY HEWLETT PACKARD VOLTAGE METER VOLTS AMPS Figure 3 1 Front Panel Controls and Indicators a Push ON OFF switch indicator 1 indi cator should light b Set METER switch 2 to VOLTS position 6110A only c Adjust voltage thumbwheel switches for desired output voltage as indicated on meter d Attach a multimeter to the output and set the voltage decadial control to at least 200 volts Check that the current indication on the multimeter does not exceed 7 5mA e Remove meter and connect load to output terminals 3 3 OPERATION 3 4 The power supply can be operated as a single unit normal operation or in parallel No provi sions for remote programming or remote sensing have been made d
38. d resistor and attenuator to the power supply as il lustrated in Figure 5 3 b Turn the front panel VOLTAGE thumb wheel controls until the front panel voltmeter in dicates exactly 3000 volts c Read and record voltage indicated on differential voltmeter d Disconnect load resistor e Reading on differential voltmeter should not vary from reading recorded in step c by more than 0 3mV 5 19 LINE REGULATION Definition The change AEOUT in the static value of DC output voltage resulting from a change in AC input voltage over the specified range from low line usually 105 volts to high line usually 125 volts or from high line to low line 5 20 check constant voltage line regulation proceed as follows a Connect variable auto transformer be tween input power source and power supply power input b Connect differential voltmeter load re sistor and attenuator as illustrated in Figure 5 3 c Adjust variable auto transformer for 105 Vac input d Adjust front panel VOLTAGE thumbwheel controls until the front panel voltmeter indicates exactly 3000Vdc Read and record voltage indicated on dif ferential voltmeter f Adjust variable auto transformer for 125 Vac input g Reading on differential voltmeter should not vary from reading recorded in step e by more than 0 3mV 5 21 RIPPLE AND NOISE Definition The residual AC voltage which is superimposed on the DC output of a regulated power supp
39. d measure AC input voltage Oscilloscope Differ 140 A plus 1400 A Plug in 1402A Plug in for spike meas urement only Sensitivity ential Input l00nV cm Measure ripple and transient response Differential Voltmeter Repetitive Sensitivity imV full scale min Rate 60 400 Hz 2 rise and Measure regulation Galibrate meter Measure transient 3420 See Note See Figure 5 7 Load Switch falltime 250V 1A Resistive Load 500 18W 1 Ka 1 ZW non inductive Power supply load Resistor Measure impedance Multimeter Accuracy 1 Measure Output current and DC voltages Capacitor s00nfd SOvdcw Measure impedance Resistor 200K 1 zw Measure impedance Oscillator 5 Hz 600 KHz Output lOvrms 0 50 C Accuracy 2 Measure impedance Controlled Temperature Oven Measure temperature stability Model 6931A Resistance Box 0 100Ka4 Accuracy 0 1 Fla Make before break contacts luf 1600wvde Measure programming coefficients Capacitor Measure ripple and noise 100 Voltage Divider 1 up to 4KV 0 01 Accu Load regulation Line regulation Keithley fnstru ments Inc Model 6601A NOTE A satisfactory substitute for a differential voltmeter is to arrange a refer ence voltage source and null detector as shown in Figure 5 2 The refer ence voltage source is adjusted so that the voltage difference between the supply being
40. e in the Replaceable Parts Table add the following Oven heating element HP Part No 8110 0189 Installation and calibration instructions for oven are covered in Service Note P 5060 6125 ERRATA In Table 1 1 and page 5 5 paragraph 5 3 step Change the ripple and noise specification to Less than 2mVrms and 5mV p p CHANGE 6 The Serial Prefix of this unit has been changed to 1145 This is the only change CHANGE 7 In the Replaceable Parts Table and on the schematic change R9 to 1204596 1 2W HP Part 0686 1215 The standard colors f r this instrument are n w mint gray f r front and rear panels and olive gray for all top bottom side and other external sur faces Option X95 designates use of the f rmer DESCRIPTION Front Panel 06110 00002 Side Chassis Right 5060 7950 Side Chassis Left 5060 7949 Rear Chassis ass y 5000 9482 Cover 2 5000 9421 ERRATA Make the following changes to the parts list on page 6 8 Option 05 Delete Transformer need not be changed Option 18 Add R55 120K 5 1 2W 0686 1248 Options 05 and 18 Add R55 same as Option 18 above change HP Part No of T2 to 5080 7130 Change part number of rubber bumper from 0403 0088 to 0403 0002 On page 6 5 and on the schematic change C27 and C28 to lF 2000V HP Part No 0160 4121 Add to the parts list the replacement lamp for flluminated switch 3101 1248 which Is used in those supplies
41. e Cause Turn the thumbwheel volt Output voltage is Low Voltage Offset age controls fram zero to 600 volts To isolate the fault to either the high voltage circuits or the low volt age feedback loop set the output voltage to 100 OV and disable the high voltage control circuit as described in Table 5 4 step 2 Check turn off of Q11 and Q10 by connecting Jumper between Q9 collector and emitter Check turn on of Q9 by connecting jumper be tween Q8 collector and emitter Check turn on of Q8 and turn off of Q7 by con necting a jumper between Q7 base and emitter Turn off the supply and remove lead from test point 23 Check the resistance from that lead to output high up to 300V then becomes normal above 300V Output voltage is high throughout voltage range Approximately 160 Approximately OV Output ramains high Output decreases to Output remains high Output decreases to Output remains high Output decreases to Ov More than 1004 1 100 1 circuit defective Proceed to step 2 Low voltage feedback Proceed to step 3 High voltage circuits Proceed to step 7 Q10 Q11 or associated components defective Remove jumper on Q9 and proceed to step 4 Q9 or associated components defective Remove jumper on Q8 and proceed to step 8 Q7 Q8 or associated components defective Reconnect Q7 and proceed to step 6 Open in R1 or R200 R235 network Check Q
42. e it is determined that the low voltage loop is defective the high voltage control circuit should be disabled by connecting jumper between L4 and L5 as illustrated in Figure 5 1 Since this places a reverse voltage across capacitors C27 and C28 a jumper must be con nected from the lead of C18 to the lead of C28 as illustrated in Figure 5 1 voltage loop should be checked as follows To check the operation of the current limit measure the voltage at test point 21 Check turn on of 11 by c n necting a jumper between the emitter and collector of O10 Check turn on of Q10 by opening the collector lead of Q9 Check turn off of Q9 by shorting base to emitter Check turn off of Q8 and tum on of Q7 by shorting Q8 base to emitter Turn off the supply and check the resistance from test point 19 to output a Less than 2V Approximately 12V Output remains low Output increases 150V Output remains low Output increases Output remains low Output increases Output remains low Output increases Approximately zero ohms Approximately 200K ohms The low Current limit circuit faulty Check CRB 95 and associated components Proceed to step 3 011 defective Remove jumper from 010 and proceed to step 5 Q10 or associated components defec tive Reconnect Q9 and proceed to step 6 Q9 or associated components defec tive Reconnect Q8 and proceed to step 7 Q8 Q7 or associ ated c
43. e the display to shift Adjust the vertical centering on the Scope so that the tail ends of the no load and full load waveforms are symmetrically displaced about POWER SUPPLY OSCILLOSCOPE UNDER TEST CONTACT PROTECTION NETWORK SA Sw 400V NOTE 3 Ry 4 6515 _ 4oK iw 61104 AND 6516A NOTE 2 REPETITIVE LOAD SWITCH NOTE 1 NOTES THIS DRAWING SHOWS A SUGGESTED METHOD OF BUILDING ALOAD SWITCH HOWEVER OTHER METHODS COULD BE USED SUCH AS A TRANSISTOR SWITCHING NETWORK MAXIMUM LOAD RATINGS OF LOAD SWITCH ARE 5AMPS 500V 250W 2500W 2 USE MERCURY RELAY CLARE TYPE HGPIOO2 OR W E TYPE 2768 3 USE WIRE WOUND RESISTOR Figure 5 7 Transient Recovery Time Test Setup 50u SECONDS UNLOADING TRANSIENT LOADING TRANSIENT Figure 5 8 Transient Recovery Time Waveforms the horizontal center line of the oscilloscope This center line now represents the nominal output voltage defined in the specification g Adjust the horizontal positioning contro so that the trace starts at a point coincident with a major graticule division This point is then rep resentative of time zero h Increase the sweep rate so that a single transient spike can be examined in detail i Adjust the sync controls separately for the positive and negative going transients so that not only the recovery waveshape but also as much as possible of the rise time of the transient is displa
44. ectric Prod Inc Sylvania Electronic Systems Western Div Mountain View Calf IRC Div of TRW Inc Burlington Plant Burlington Iowa Continental Device Corp Hawthorne Calif Raytheon Co Components Div Semiconductor Operation Mountain View Calif Breeze Corporations Inc Union N J Reliance Mica Corp Brooklyn N Y Sloan Company The Sun Valley Calif Vemaline Products Co Inc Wyekoff 7 General Elect Minia ture Lamp Dept Cleveland Ohio Nylomatic Corp Norrisville Pa RCH Supply Co Vernon Calif Airco Speer Electronic Components Bradford Pa Hewlett Packard Co New Jersey Div Berkeley Heights N General Elect Co Semiconductor Prod Dept Buffalo N Y General Elect Co Semiconductor Prod Dept Auburn N Y C amp K Components inc Newton Mass Burndy Corp Norwalk Conn Wagner Electric Corp TungSel Div CTS of Berne Inc Chicago Telephone of Cal Inc So Pasadena Calif IRC Div of TRW Inc Boone Plant Boone N C Bloomfield N f Berne Ind General Instrument Corp Rectifier Div Philadelphia Handle Co Inc Camden N 7 8 Terminals Inc Cincinnati Ohio Hamlin Ine Lake Mills Wisconsin Clarostat Mfg Co Inc Dover N H Thermalloy Co Dallas Texas Hewlett Packard Co Loveland Div Loveland Colo Cornell Dubilier Electronics Div Federal Pacific Electric Co Newark N J General Instrument Corp Semicon ductor Pred Group Hicksville N Y Fenwal Elec
45. ed wires and each load connected separately to the remote distribution terminals 0 1 to 1 capacitor should be connected across the remote distribution terminals to reduce high frequency coupling and nolse 3 13 OUTPUT CAPACITANCE 3 14 An internal capacitor across the output ter minals of the power supply helps to supply high current pulses of short duration during constant voltage operation Any capacitance added exter nally will improve the pulse current capability but will decrease the safety provided by the cur rent limiting circuit A high current pulse may damage load components before the average output current is large enough to cause the current limit ing circuit to operate 3 15 REVERSE CURRENT LOADING 3 16 Active loads connected to the power supply may actually del ver a reverse current to the pow er supply during a portion of its operating cycle An external source cannot be allowed to pump rent into the supply without loss of regulation and possible damage to the output capacitor To avoid these effects it is n cessary to preload the sup ply with a dummy load so that the power supply delivers current through the entire operating cycle of the load device 3 17 REVERSE VOLTAGE LOADING 3 18 A diode is connected across the output ter minals Under normal operating conditions the diode is reverse biased anode connected to neg ative terminal If a reverse voltage is applied to the outp
46. en the tem perature is high enough the voltage developed across R57 will have decreased sufficiently to lower the emitter bias of Q16 stopping its output pulses and turning CR31 off 4 33 REFERENCE CIRCUIT 4 34 The reference circuit is feedback power Supply similar to the main supply It provides stable reference voltages which are used through out the unit The reference voltages are all de rived from raw dc obtained from the full wave rectifier CR24 and CR25 and filter capacitor C16 The 46 2 and 9 4 voltages which are used in the constant voltage input circuit for comparison purposes are developed across temperature com pensated Zener diodes VRI and VR2 Resistor R49 limits the current through the zener diodes to es tablish an optimum bias level 4 35 The reference circuit is closed loop feed back regulator which acts to maintain the voltage at test point 16 at 12 4 volts regardless of line voltage variation Any difference between the zener reference diode 1 and 1 2 of the 12 4 volt bus as sampled by R47 and R48 1s amplified by Q14 and Q15 connected as a differential am plifier The error is further amplified Q13 and is applied to the base of series regulator 012 which controls the output voltage of the reference circuit 4 36 Zener diode VR2 is added in series with the reference outputs to provide a 9 4 volt bias out put The main reference voltage is the 6 2 volt gener diode VR1 The 12 4 volt
47. erify that the ambient temperature remains constant during the period of measurement The supply should be put in a location immune from stray air currents open doors or windows air conditioning vents if pos sible the supply should be placed in oven which is held at constant temperature Care must be taken that the measuring instrument has stability over the eight hour interval which is at least an order of magnitude better than the stabil ity specification of the power supply being meas ured Typically a supply may drift less over the eight hour measurement interval than during the 1 2 hour warm up period Stability measurement can be made while the supply is remotely programmed with a fixed wire wound resistor thus avoiding accidental changes in the front panel setting due to mechan ical vibration or knob twiddling 5 48 To check the output stability proceed as follows Connect the load resistance attenuator and differential voltmeter as illustrated Figure 5 3 b Adjust front panel VOLTAGE RANGE switch and VERNIER until the differential voltmeter indicates 30Vdc c Allow 30 minutes warm up then record the differential voltmeter indication d After 8 hours differential voltmeter should change by less than 3 5mV from indication recorded in step c 5 49 CURRENT LIMIT 5 50 To check the current limiting characteristics of the supply proceed as follows Connect a milliamme ter acros
48. ery time may be measured at any input line voltage combined with any output voltage and load current within rating 5 37 Reasonable care must be taken in switching the load resistance on and off A hand operated switch in series with the load is not adequate since the resulting one shot displays are difficult to observe on most oscilloscopes and the arc energy occurring during switching action complete ly masks the display with a noise burst Transis tor load switching devices are expensive if rea Sonably rapid load current changes are to be a chieved mercury wetted relay as connected in the load switching circuit of Figure 5 7 should be used for loading and unloading the supply When this load switch is connected to a 60 Hz AC input the mercury wetted relay will open and close 60 times per second Adjustment of the 25K control permits adjustment of the duty cycle of the load current switching and reduction in jitter of the oscilloscope display 5 38 To check the transient recovery time pro ceed as follows a Connect test setup as shown in Fig ure 5 7 b Set the VOLTAGE thumbwheel switches for 90Vdc c Close the line switch on the repetitive load switch setup d Set the oscilloscope for internal sync and lock on either the positive or negative load transient Spike e Set the vertical input of the oscilloscope for AC coupling so that small DC level Changes in the output voltage of the power supply will not caus
49. follows a Set the VOLTAGE controls for 0Vde and turn off the supply b Connect the differential voltmeter direct ly across the output of the power supply c Disconnect the lead from the thumbwheel assembly at test point 23 Connect precision 100K 01 resistor between the lead and test point 23 d Set potentiometers R14 and R16 to mid range Connect 1 decade resistance box set to 300 ohms in place of R17 f Turn on the supply and allow a 15 min ute warm up Connect a jumper across the 100K resis tor and adjust the output to zero volts using ZERO ADJ potentiometer R14 h Remove the jumper across the 100K re sistor and adjust the decade resistance until the front panel meter indicates 100Vdc i Select R17 according to the following list and solder into place Wirewound Resistor Resistance IW 1 Stock No 0 504 50 150 984 0811 1923 150 2504 18974 0811 1925 250 3504 2974 0811 1929 350 4504 4004 0811 1930 450 5504 50545 0811 1932 50 upa 6124 0811 1933 Decade j Adjust R16 until differential voltmeter indicates 100 volts 5 65 METER MECHANICAL ZERO 5 66 Procecd as follows to zero meter a Turn off instrument after it has reached normal operating temperature and allow 30 sec onds for all capacitors to discharge b Insert sharp pointed object pen point or awl into the small hole at top of round black plas tic disc located directly below meter face c Rot
50. hange to HP Part No 06110 60005 R19 Change to 1 1 iW HP Part No 0811 2770 T2 Change to HP Part No 5080 7128 Option 05 T2 Delete Transformer need not be changed Option 18 T2 change to HP Part No 5080 7130 ERRATA Q7 8 Change to 2N2907A Sprague 56289 HP Part No 1853 0099 55 PNP Si In Replaceable Parts Table make the following changet Q11 Change to 2N4240 RCA HP Part No 1854 0311 On Page 6 8 under Manual Backdating Changes change the second sentence to read To adapt the manual to serial numbers prior to 6F0161 make the following changes On the Schematic Diagram change the value of capacitor C14 to 20yF In the Replaceable Parts Table make the following changes Change CR11 24 28 and 32 to Reet 750mA 200prv quantity 7 1N5059 GE 03508 HP Part No 1901 0327 RS 6 Change CR29 and CR30 to Rect 31 750mA 800prv quantity 2 1N5062 GE 03508 HP Part No 1901 0330 RS 2 GHANGE 3 In the Replaceable Parts Table change the HP Part No of switch Sl to 3101 1244 This switch requires new front panel lettering CHANGE 4 In the replaceable parts table change the HP Part No of switch 1 to 3101 1248 CHANGE 5 In the Replaceable Parts Table delete the listing for BNC HV Cable Plug and associated hardware and add new listing BNC HV Connector HP Part No 1250 1267 ERRATA In Table 5 2 Step 5 Page 5 9 change the Meter Common connection to VR2 anod
51. ial Voltmeter Substitute Diagram Test Setup L m Servicing Printed Wiring Boards HARRISON 6 DC POWER SUPPLY HEWLETT PACKARD O 3000v MA ip 19 ZU an E mun m FT MILLJAMPS 7 LINE Figure 1 1 DC Power Supply Model 6110 SECTION I GENERAL INFORMATION 1 1 DESCRIPTION 1 2 This instrument figure 1 1 is an all semi conductor high voltage supply suitable f r either bench or relay rack operation It is a compact well regulated Constant Voltage Current Limited supply that will furnish 3 000 volts at 6 milliamps or can be adjusted throughout the output voltage range It is designed f r applications requiring extreme stability regulation and insensitivity to amblent temperature variations 1 3 This supply utilizes a series regulated biggy back circuit technique that consists of placing a well regulated low voltage power supply in series with a less well regulated supply having a greater voltage capability The well requlated piggyback supply continuously compensates for any ripple lead regulation or line regulation de ficiencies of the main power source and adjusts the voltage across its series regulator 50 that the total output voltage remains constant despite dis turbances in the main voltage source 1 4 OVERLOAD PROTECTION 1 5 The voltage thumbwheel switches select the constant voltage level an internal potentiometer selects the current
52. in replacing components on a printed 5 60 Before servicing a printed wiring board wiring board Excessive heat or pressure can lift the copper strip from the board Avoid damage by using a low power soldering iron 50 watts maximum and following these instructions Copper that lifts off the board should be cemented in place with a quick drying acetate base cement having good electrical insulating properties A break in the copper should be repaired by soldering 4 short length af timed copper wire across the break Use only high quality rosin core solder when repairing etched circuit boards NEVER USE PASTE FLUX After soldering clean off any excess flux and coat the repaired area witha high quality electrical varnish or lacquer When replacing components with multiple mounting sin suchastube sockets electrolytic capa citors and potentiometers it will be necessary to lift each pin slightly working around the components several times until it is free WARNING If the specific instructions outlinedinthe steps below regarding etched circuit boards without eyelets are not followed extensive damage to the etched circuit board will result 2 Reheat solder in vacant eyeletand quickly insert a small awlto cleaninside of hole If hole does not have an eyelet in sert awl or a 57 drill from con ductor side of board 1 Apply heat sparingly to lead of component tobe replaced If lead of component passes through an eyelet in
53. ke fll Bendix Corp Electrodynamics Div No Hollywood Calif Palnut Co Mountainside N J Patton MacGuyer Providence Phaostron Instrument and Electronic Ca South Pasadena Calif Philadelphia Steel and Wire Corp Philadelphia Pa American Machine and Foundry Potter and Brumfield Div Princeton Ind TRW Electronic Components Div Camden Resistance Products Co Harrisburg Pa Illinois Tool Works Inc Shakeproof Div Elgin Ill Everlock Chicago Inc Chicago Ill Stackpole Carbon Co St Marys Pa Stanwyck Winding Div San Fernando Electric Mfg Co Inc Newburgh Tinnerman Products Inc Cleveland Ohio Stewart Stamping Corp Yonkers N Y Waldas Kohinoor Inc LLC N Y Whitehead Metals Inc New York N Y Continental Wirt Electronics Corp Philadelphia Pa Zierlek Mfg Mt Kisco N Y Mepco Div of Sessions Clock Co Morristown 7 Bourns Inc Riverside Calif Howard Industries Div of Mel Ind Inc Racine Wise Grayhill Inc La Grange International Rectifier Corp El Segundo Calif Columbus Electronics Corp Yonkers N Y Goodyear Sundries amp Mechanical Co Inc New York Y Airco Speer Electronic Components Du Bois Pa Sylvania Electric Products Inc Electronic Tube Div Receiving Tube Operations Emporium Pa Switcheraft Inc Chicago Ill Metals and Controls Inc Control Products Group Attleboro Mass Research Products Corp Madison Wis Rotro
54. ke Measurement When a high frequency spike measurement is being made an instrument of sufficient bandwidth must be used an oscilloscope with a bandwidth of 20 MHz or more is adequate Measuring noise with an instru ment that has insufficient bandwidth may conceal high frequency spikes detrimental to the load 5 33 The test setups illustrated in Figures 5 4 and 5 4B are generally not acceptable for measur ing spikes a differential oscilloscope is necessary Furthermore the measurement concept of Figure 5 4C must be modified if accurate spike measure ment is to be achieved son TERMINATION gt OSCILLOSCOPE T CONNECTOR CASE POWER SUPPLY CASE AT VERTICAL son 1 INPUT VERTICAL 1 INPUT T CONNEC TOR son TERMINATION Figure 5 6 Noise Spikes Test Setup l As shown in Figure 5 6 two coax cables must be substituted for the shielded two wire ca ble In addition a high voltage protection network Figure 5 5 as described in paragraph 5 31 should be connected in series with the power supply out put 2 Impedance matching resistors must be included to eliminate standing waves and cable ringing and the capacitors must be connected to block the DC current path 3 The length of the test leads outside the coax is critical and must be kept as short as pos sible the blocking capacitor and the impedance matching resistor should be connected directly from the inner conductor of the cable to the power supply
55. limit level The supply will automatically crossover from constant voltage to current limit operation and vice versa if the output current or voltage exceeds these preset levels Detailed characteristics of the output current iting are given in Paragraph 3 5 1 6 The power supply is protected from reverse voltage positive voltage applied to negative ter minal by an internal protection diode that shunts current across the output terminals when this con dition exists clamping the reverse voltage Pro tection from reverse current current forced into the power supply in the direction opposite to the output current must be provided by preloading the power supply Paragraph 3 18 The power supply cannot accept reverse current without damage 1 7 COOLING 1 8 Convection coaling is used no fan is re quired The power supply has no moving parts except for the meter movement 1 9 OUTPUT TERMINALS 1 10 Output power is available via two UG 931 U connectors mounted on the front panel of the sup ply Mating connectors UG 932 U are supplied with the unit The output terminals are isolated from the chassis and either the positive or the neg ative terminal may be connected to the chassis by shorting the center pin to the case of the applica ble UG 931 U connector or by grounding a wire from the connector to the chassis The power sup ply ig insulated to permit operation up to 1 000 volts de off ground i e the maximum potential
56. ly Ripple and noise may be specified and measured in terms of its RMS or preferably peak to peak value 5 22 Ripple and noise measurement can be made at any input AC line voltage combined with any DC output voltage and load current within rating 5 23 The amount of ripple and no se that is pres ent on the power supply output is measured either in terms of the RMS or preferably peak to peak value The peak to peak measurement is partic ularly important for applications where noise spikes could be detrimental to a sensitive load such as logic circuitry The RMS measurement is not an ideal representation of the noise since fairly high output noise spikes of short duration could be present in the ripple and not appreciably increase the RMS value 5 24 The technique used to measure high frequen cy noise or spikes on the output of a power sup ply is more critical than the low frequency ripple and noise measurement technique therefore the former is discussed separately in Paragraph 5 32 5 25 Ripple and Noise Measurements Figure 5 4 shows an incorrect method of measuring p p ripple Note that a continuous ground loop exists from the third wire of the input power cord of the supply to the third wire of the input power cord of the oscilloscope via the grounded power supply case the wire between the negative output termi nal of the power supply and the vertical input of the scope and the grounded scope case Any ground curren
57. manual to serial numbers prior to GEO183 make the following changes CHANGE 1 On the schematic remove CR29 and center tap connection at terminal 13 in the secondary of 2 and add new resistor and zener diodes as shown on the sketch below ZENER DIODES 1N4746 2 4K aw 190 HIGH VOLTAGE CONTROL CIRCUIT WAVEFORMS 140V SGR FIRING toov INPUT OUTPUT TF UN TO 20V CM 1OMS CM och TP 36 TO 20V CM IOMS CM USVAG INPUT 6 OUTPUT TP 36 TO SV CM IOMS CM TO 2O0V CM IOMS CM INPUT Ov OMA OUTPUT INPUT 3000V 6MA OUTPUT NORMAL WAVEFORMS HSVAC INPUT OV OMA OUTPUT TO 4 20V CM I MS CM 5 INPUT 6 OUTPUT TO 20V CM IOMS CM INPUT TP 36 TO OV OMA OUTPUT BOV CM tOMS CM INPUT 1500 WGMA OUTPUT TP 36 TO ZOV CM 1OMS CM IOSVAC INPUT 500V 2MA OUTPUT TF 38 TO 5 MS CM TYPICAL TROUBLES INPUT TP 36 TO 3000V amp MA OUTPUT 20V CM 1OMS CM WAVEFORM INDICATES MISADJUSTMENT OF PROTECTION CIRCUIT NOTE THAT NEGATIVE PEAK IS TOUCHING BAS LINE WAVEFORM INDICATES ONE SCR CRT OR CR40 NOT FIRING NOTE POSITIVE PEAKS TOUCH OV BASE LINE NOTE ALL WAVEFORMS ARE OC COUPLED M A A eS age r OVEN CONTROL CIRCUIT 21 JEMITTER FOLLOWER 27 PIGGYBACK
58. matic Discussion VI REPLACEABLE PARTS 4 12 Detailed Circuit Analysis 6 1 Introduction 4 13 Series Regulator 6 4 Ordering Information 4 15 Constant Voltage Input Circuit Reference Designators 4 21 Driver and Error Amplifier Abbreviations 4 23 Current Limit Circuit Manufacturers 4 25 High Voitage Control and Code List of Manufacturers Doubler Circuits Parts List Table t i 3 3 3 3 Rated Output 3 9 Load Connection 3 13 Output Capacitance 3 15 Reverse Current Loading 3 17 Reverse Voltage Loading Qo C29 Q2 1 2 bon c a Wr i gt e PR LC 1 2 2 3 4 4 5 I DC Power Supply Rack Mounting Two Units Rack Mounting One Unit Front Panel Controls and Indicators Overall Block Diagram Simplified Schematic Diagram High Voltage and Troubleshooting Location Diagram TABLE OF CONTENTS CONTINUED LIST OF TABLES Specifications Test Equipment Bias Reference and Rectifier Voltages Low Output Voltage Troubleshooting High Output Voltage Troubleshooting LIST OF ILLUSTRATIONS Page No iv Page No Line and Load Regulation Test Setup 5 3 Ripple and Noise Test Setup High Voltage Protection Network Noise Spikes Test Setup Transient Recovery Time Test Setup Transient Recovery Time Wavetorms Output Impedance Test Setup Printed Circuit Board Location j He 1 H q D 450 90 AB e Different
59. n Inc Woodstock N Y Vector Electronic Co Glendale Calif Carr Fastener Co Cambridge Mass Victory Engineering Corp Springfield Bendix Corp Electric Power Div Eatontown 7 Herman Smith Ine Brooklyn N Y Central Screw Co Chicago fll Gavitt Wire and Cable Div of Esna Corp Brookfield Mass CODE NO MANUFACTURER ADDRESS Grant Pulley and Hardware Co West Nyack Burroughs Corp Electronic Components Div Plainfield 0 5 Radium Corp Morristown N Yardeny Laboratories Inc New York N Y Arco Electronics Inc Great Neck N Y TRW Capacitor Div Ogellala Neb RCA Corp Electronic Components Harrison N j Rummel Fibre Co Newark N J Marco amp Oak Industries a Div of Oak Electro naties Corp Anaheim Calif Philco Corp Lansdale Div Lansdale Pa Stockwell Rubber Co Inc Philadelphia Pa Tower Olschan Corp Bridgeport Conn Cutler Hammer Inc Power Distribution and Control Div Lincoln Plant Lincoln Litton Precision Products Inc USECO Div Litton Industries Van Nuys Calif Gulton Industries Inc Metuchen 1 United Car Inc Chicago Ili Milier Dial and Nameplate Co El Monte Calif Chicago Ill Attleboro Mass Dale Electronics Inc Columbus Neb Eleo Corp Willow Grove Pa Honeywell Div Micro Switch Freeport IIL Whitso Inc Schiller Pk 1 Sylvania Electric Prod Inc Semi conductor Prod Div Wobum Mass Essex
60. o 100k 10 HP Part No 2100 3214 p CHANGE 9 Change power transformer Tl to HP Part No 5080 1910 The primary of the new transformer can be strapped for l15Vac 230Vac input as shown below Change rear chassis to HP Part No 5000 3148 Replace capacitor clamp HP Part No 5000 6023 with capacitor bracket HP Part No 1210 0006 Change zener diode VR2 to 97 0 005 T CC HP Part No 1302 0785 Note that the old zener diode 1902 0763 Should not be used for replacement at any time Tt Ti PRIMARY PRIMARY 230VAC CONNECTIONS H5vac CONNECTIONS Manual Changes Model 6110 DC Power Supply Manual HP Part 06110 90001 Page 3 ERRATA In Table 1 1 change the Transient Recovery Time Spectfication to read as follows Less than 50Q sec 15 required for output voltage recovery to within 50mV of the nominal output voltage following a change in output current equal to the current rating of the supply when theinput line voltage 15 at l1 Vac or 23 0Vac 9 26 78 TABLE OF CONTENTS Section Page No Section Page No GENERAL INFORMATION PRINCIPLES OF OPERATION Continued 1 1 Description 4 29 Protection Circuit Overload Protection 4 31 Oven Control Circuit Cooling 4 33 Reference Circuit Output Terminals 4 37 Meter Circuit Specifications Options Accessories Instrument Identification Ordering Additional Manuals EA FG pe pe 1 DO PO RS Lore LS erg b b am
61. o be con nected to ground at one end only so that no ground current will flow through this shield thus induc ing a noise signal in the shielded leads 5 29 To verify thatthe oscilloscope is not display ing ripple that is induced in the leads or picked up from the grounds the 4 scope lead should be shorted to the scope lead at the power supply terminals The ripple value obtained when the leads are shorted should be subtracted from the actual ripple measurement 5 30 In most cases the single ended scope method of Figure 5 4B will be adequate to elimi nate non real components of ripple and noise so that a satisfactory measurement may be obtained However in more stubborn cases it may be nec essary to use a differential scope with floating input as shown in Figure 5 4C If desired two single conductor shielded cables may be substi tuted in place of the shielded two wire cable with equal success Because of its common mode re jection a differential oscilloscope displays only the difference in signal between its two vertical input terminals thus ignoring the effects of any common mode signal introduced because of the difference in the AC potential between the power supply case and scope case Before using a dif ferential input scope in this manner however it is imperative that the common mode rejection ca pability of the scope be verified by shorting to gether its two input leads at the power supply and observing the t
62. omponents defective Reconnect Q8 and proceed to step 8 Short in or R200 R235 network Check Q1 Q2 Q3 or associated To check the high voltage control circu t set the output VOLTAGE controls to 900V and re move the jumpers from 14 15 and C18 028 Proceed with step 10 Table 5 3 Low Output Voltage Troubleshooting Continued step ction Response Probable Cause NOTE Waveforms that indicate normal operation of the high voltage control circuit under various line and load conditions are shown on the schematic diagram at the rear of the manual Connect the oscilloscope be scr FIRING 7 If VR3 is on or blink tween test point 11 and out CTI HETEN ing OVERVOLTAGE Set the oscilloscope for d control R71 should be coupled input adjusted see para graph 5 73 Q17 leaky or shorted Ma 5 i MUST ALWAYS y CR7 or CR40 shorted EXC ED OVOLTS or leaky WHE T e Org 28 or CRS shorted 41 open or shorted The waveform above indi Tl or L3 defective cates a normal condition Note that the lowest peak does not reach zero volts T P li TO 2OV CM lOmS CM The waveform above is in dicative of poor regulation and erratic output in addi tion to slightly low output voltage Note that the lowest peak touches 0 If the output is very low the waveform is com pressed toward OV Table 5 4 High Output Voltage Troubleshooting Probabl
63. oses 4 6 The high voltage control circuit monitors the voltage across the piggy back supply and alters the conduction of transformer 1 so that the output of the high voltage doubler can be varied between 0 and 3 2 kilovolts For instance if the high volt age control is adjusted for output voltage in ex cess of the voltage supplied by the piggy back supply the input to the high voltage control cir cuit becomes more negative The high voltage control circuit opens the control winding and all the energy appearing at the ac input of transformer Tl is coupled to the secondary which is connected to the high voltage doubler The result is that the output voltage of the high voltage doubler increases If the voltage control is adjusted for an output which is legs than the piggy back supply th input to the high voltage contro circuit becomes less negative The control winding of transformer Tl becomes shorted impeding the transfer of energy from the ac input to the secondary which is con nected to the high voltage doubler Thus the out put voltage of the high voltage doubler decreases 4 7 In Model 6110A an oven houses the temper ature sensitive components in the supply t pro vide a low temperature coefficient which results in excellent stability The oven control circuit maintains the oven temperature at 650C eh SERIES REGULATOR HIGH VOLTAGE DOUBLER Ti CR4IA R28 CURRENT SAMPLING RESIST
64. owever the oscilloscope display unlike the true RMS meter reading tells the observer immediately whether the fundamental period of the signal displayed is 8 3 milliseconds 1 120 Hz or 16 7 milliseconds 1 60 Hz Since the fundamental ripple frequency present on the output of an d supply is 120 Hz due to full wave rectification an oscilloscope display showing a 120 Hz fundamental component is indicative of a clean measurement setup while the presence of a 60 Hz fundamental usually means that an improved setup will result in a more accurate and lower value of measured ripple 5 27 Figure 5 4B shows a correct method of mea suring the output ripple of a constant voltage pow er supply using single ended scope The ground loop path is broken by floating the power supply output Note that to ensure that no potential dif ference exists between the supply and the oscillo Scope it is recommended that whenever possible they both be plugged into the same AC power buss If the same buss cannot be used both AC grounds must be at earth ground potential 5 28 Either a twisted pair or preferably a shield ed two wire cable should be used to connect the output terminals of the power supply to the verti cal input terminals of the scope When using a twisted pair care must be taken that one of the two wires is connected to the grounded input ter minal of the oscilloscope When using shielded two wire it is essential for the shield t
65. r a 0 3500V voltmeter or as a 0 7mA ammeter OUTPUT TERMINALS The output of the supply is floating thus the supply can be used as either a positive or nega tive source Terminals for OUT OUT and GND are provided on the front of the supply COOLING Convection cooling is employed has no moving parts The supply SIZE Bi Wx 54 Hx 16 D WEIGHT 19 lbs net 23 lbs shipping Two of the units be mounted side by side in a standard 19 relay rack FINISH Light gray front panel with dark gray case POWER CORD A 3 wire 5 foot power cord is provided with each unit SECTION II INSTALLATION 2 1 INITIAL INSPECTION 2 2 Before shipment this instrument was in spected and found to be free of mechanical and electrical defects As soon as the instrument is unpacked inspect for any damage that may have occurred in transit Save all packing materials until the inspection is completed If damage is found proceed as described in the Claim for Damage in Shipment section of the warranty page at the rear of this manual 2 3 MECHANICAL CHECK 2 4 This check should confirm that there are no broken knobs or connectors that the cabinet and panel surfaces are free of dents and scratches and that the meter is not scratched or cracked 2 5 ELECTRICAL CHECK 2 6 The instrument should be checked against its electrical specifications Section V includes an in cabinet performance check to verify proper ins
66. race on the CRT If this trace is a straight line the scope is properly ignoring any common mode signal present If this trace is not a straight line then the scope is not rejecting the ground signal and must be realigned in accordance with the manufacturer s instructions until proper common mode rejection is attained 5 31 To check the ripple and noise output pro ceed as follows a Connect the oscilloscope or RMS volt meter as shown in Figures 5 4B or 5 4 In addi tion connect the high voltage protection network illustrated in Figure 5 5 in series with the power supply output In this network the diodes clamp the input to the oscilloscope in the event that the power supply is rapidly turned up or down The 50 ohm resistor limits the current through the diodes The 5Meg resistor is a bleeder to dis charge the 0 luf capacitor which is a 3000Vdc blocking capacitor A good quality 3000Vdc block ing capacitor can be used in place of the protection network however if the capacitor becomes leaky or in cases where the power supply output voltage is rapidly increased or decreased the oscillo scope input could be damaged b Adjust VOLTAGE control until front panel meter indicates maximum rated output voltage C The observed ripple and noise should be less than 400hV RMS and 1mV p p 500 Oluf 5w 3000V POWER SUPPLY OUTPUT IMEG OSCILLOSCOPE INPUT IN3253 Pigure 5 5 High Voltage Protection Network 5 32 Noise Spi
67. rectifier circuits as source of trouble the malfunction is caused by either the low or high voltage regulating loops If any component a feedback loop is defective meas urements made anywhere in the loop may appear abnormal Under these circumstances it 15 very difficult to separate cause from effect with the loop closed As described in Tables 5 3 and 5 4 the trouble is isolated to either the high or low voltage regulating loop The loop is opened and the conduction and cutoff capability of each stage is checked as follows 1 Shorting the emitter to collector of a transistor simulates saturation or the full ON condition 2 Shorting the emitter to base of a transis tor cuts it off and simulates an open circuit be tween emitter and collector Table 5 3 Low Output Voltage Troubleshooting 5 58 Although logical first choice might be to break the loop somewhere near its mid point and then perform successive subdividing test it is more useful to trace the loop from the series reg levels ulator backwards stage at a time since loop failures occur more often at the higher power Probable Cause To isolate the fault to either the high voltage circuits or the low voltage faadback loop measure the voltage between the collec tor case of O11 and 5 a Approximately 160V b Approximately b Low voltage feedback loop Proceed to step 2 High voltage circuits Proceed to step 9 Onc
68. s urements use a T connector at the positive output terminal and connect the load to one output of the T connector and the measuring device to the other DANGER HIGH VOLTAGE DANGER HIGH VOLTAG MARMION POWER SUPPLY HEMLETT PACKARD METER amps DANGER HIGH VOLTAGE Figure 5 1 High Voltage and Troubleshooting Location Diagram output of the T connector For current measure ments connect a four terminal current monitoring resistor in series with the load resistor and con nect both to one output of the T connector Con nect the measuring device across the current mon itoring resistor 5 8 When using an oscilloscope ground the case at the same ground point as the grounded terminal of the power supply Make certain that the case is not also grounded by some other means power cord Connect both oscilloscope input leads to the power supply ground and check that the oscilloscope is not exhibiting a ripple or transient due to ground loops pick up or other means 5 9 TEST EQUIPMENT REQUIRED 5 10 Table 5 1 lists the test equipment required to perform the various procedures described in this section Table 5 1 Test Equipment Required Use Recommended Model AC Voltmeter Accuracy 2 full scale min Sensitivity Measure AC voltages Variable Voltage Transformer Range 90 130 volts Equipped with voltmeter accurate within 1 volt 1 KW rating Vary an
69. s the output of the supply b Turn on the supply and increase the out put voltage until the milliammeter indicates 6mA c Check that the supply is not in current limit by examining the output ripple The ripple will be very high much greater than 400uV if the supply is in current limit d Increase the output voltage to 3000V and ensure that the output current does not exceed 8mA 5 51 TROUBLESHOOTING 5 52 Before attempting to troubleshoot this in strument ensure that the fault is with the instru ment and not with an associated circuit The per formance test Paragraph 5 11 enables this to be determined without having to remove the instrument from the cabinet 5 53 A good understanding of the principles of op eration is a helpful aid in troubleshooting and it is recommended that the reader review Section IV of the manual before attempting to troubleshoot the unit in detail Once the principles of operation are understood refer to the overall troubleshooting procedures in paragraph 5 55 to locate the symptom and probable cause NOTE The normal voltages shown on the schematic diagram at the rear of the Table 5 2 manual are positioned adjacent to the applicable test points identified by encircled numbers on the s5chemat ic and printed wiring boards 5 54 Once the defective component has been lo cated by means of visual inspection or trouble analysis correct it and re conduct the performance test
70. stor Q7 from the negative output voltage of the piggy back sup ply This voltage can goas far negative as 187 volts 4 29 PROTECTION CIRCUIT 4 30 This circuit prevents the high voltage doubler from exceeding approximately 4kV which might oc cur if the feedback loop were to malfunction Diodes CR37 and CR38 are connected directly across the control winding and rectify monitor the voltage across this winding The rectified voltage charges capacitor C24 and when it exceeds a pre determined level neon tube VR3 fires The result ing positive golng voltage turns on Q17 which in turn shorts the control winding of transformer T1 thus reducing the output of the high voltage dou bler Overvoltage control R71 determines the level at which VR3 will fire and therefore controls the maximum output voltage of the high voltage dou bler 4 31 OVEN CONTROL CIRCUIT 4 32 The oven temperature is sensed by thermistor R57 If the temperature is too low the resistance of R57 will be high enough to bias the emitter of unijunction transistor Q16 sufficiently positive for it t act as a free running pulse generator These pulses are coupled through CR6 and R52 to the gate of the silicon controlled rectifier CR31 The first pulse in any half cycle of line voltage will cause CR31 to conduct and remain conducting un til the end of the half cycle When CR31 is con ducting current flows through the oven heater winding raising the temperature Wh
71. t double pole doubie throw double pole single throw electrolytic encapsulated farad degree Farenheit fixed germanium Henry Hertz integrated circuit inside diameter incandescent kilo 103 milli 1073 mega 105 micro 1076 metal Reference Designators Continued vacuum tube neon bulb photocell etc zener diode socket integrated cir cuit or network Description Abbreviations manufacturer modular or modified mounting nano 1079 normally closed normally open nickel plated ohm order by description outside diameter pico 10 12 printed circuit potentiometer peak to peak parts per million peak reverse voltage rectifier root mean square silicon single pole double throw single pole single throw small signal slow blow tantulum titanium volt variable wirewound Watt CODE NO Table 6 3 MANUFACTURER ADDRESS Jamaica N Y New Bedford Mass EBY 8ales Co Inc Aerovox Corp Sangamo Electric Co 5 Carolina Div Allen Bradley Co Litton Industries Inc Beverly Hills Calif TRW Semiconductors Inc Lawndale Calif Pickens 5 Milwaukee Wis Texas Instruments Inc Semiconductor C mponents Div Dallas Texas Manchester N H Rockford Dover Ohio Saugerties N Y RCL Electronics Inc Amerock Corp Sparta Mfg Co Ferroxcube Corp Fenwal Laboratories Morton
72. t Framingham Mass Corning Glass Works Electronic Components Div Raleigh N C Newark N J Use Code 28480 assigned to Hewlett Packard Co Palo Alto California 6 2 CODE No MANUFACTURER ADDRESS 16758 17545 17803 17870 18324 19315 19701 21520 22229 22753 23936 24446 24455 24655 24681 26982 27014 28480 28520 28875 31514 31827 33173 35434 37942 42190 43334 44655 46384 47904 49956 55026 56289 58474 58849 59730 61637 63743 Table 6 3 Code List of Manufacturers Continued Delco Radio Div of General Motors Corp Kokomo Ind Atlantic Semiconductors Inc Asbury Park N J Fairchild Gamera and Instrument Corp Semiconductor Div Transducer Plant Mountain View Calif Daven Div Thomas A Edison Industries McGraw Edison Co Orange Signetics Corp Sunnyvale Galf Bendix Corp The Navigation and Control Div Teterboro N J Electra Midland Corp Mineral Wells Texas Fansteel Metallurgical Corp No Chicago Ill Union Carbide Corp Electronics Div Mountain View Calif UID Electronics Corp Hollywood Fla Pamotor Inc Pampa Texas General Electric Co Schenectady N Y General Electric Co Lamp Div of Cor sumer Prod Group Nela Park Cleveland Ohio General Radio Co West Concord Mass LTV Blectrosystems Inc Memcor Com ponents Operations Huntington Ind Dynacool Mfg Co Inc Saugerties N National Semiconductor Corp Santa Clar
73. t any controls proceed to troubleshooting 5 14 RATED OUTPUT METER AND OUTPUT CONTROLS ACCURACY 5 15 Voltage To check the accuracy of the out put voltage front panel voltmeter and front panel voltage controls proceed as follows a Connect the differential voltmeter load resistor and the attenuator to the power supply as illustrated in Figure 5 3 Load resistance is ap proximately 500K ohms 18 watts b Turn the front panel VOLTAGE thumbwheel controls until the front panel voltmeter indicates exactly 3000Vdc POWER SUPPLY DIFFERENTIAL VOLTME TER OR OSCILLOSCOPE Figure 5 3 Line and Load Regulation Test Setup The differential voltmeter should indi cate 30 lt 0 6Vdc 5 16 Current To check the output current capa bility of the supply proceed as follows a QConnect the multimeter set to the 10 position or another milliammeter in series with a 500K 18W load resistance and attach the series combination to the output terminals b Adjust the VOLTAGE thumbwheel controls until the front panel voltmeter indicates 3000Vdc c The multimeter should indicate 6mA 5 17 LOAD REGULATION Definition The change AEQUT in the static value of DC output voltage re sulting from a change n load resist ance from open circuit to a value which yields maximum rated output current or vice versa 5 18 To check constant voltage load regulation proceed as follows a Connect differential voltmeter loa
74. t circulating in this loop as a result of the difference in potential EG between the two ground points causes an IR drop which is in series with the scope input This IR drop normally hav ing a 60Hz line frequency fundamental plus any pickup on the unshielded leads interconnecting the power supply and scope appears on the face of the CRT The magnitude of this resulting noise signal can easily be much greater than the true ripple developed between the plus and minus out put terminals of the power supply and can com pletely invalidate the measurement POWER SUPPLY CASE OSCILLOSCOPE CASE INCORRECT METHOD GROUND CURRENT Is PRODUCES 60 CYCLE DROP IN NEGATIVE LEAD WHICH ADDS TO THE POWER SUPPLY RIPPLE DISPLAYED ON SCOPE POWER SUPPLY CASE OSCILLOSCOPE CASE B A CORRECT METHOD USING SINGLE ENDED SCOPE OUTPUT FLOATED TO BREAK GROUND CURRENT LOOR TWISTED PAIR REDUCES STRAY PICKUP ON SCOPE LEADS OSCILLOSCOPE CASE VERTICAL INPUT POWER SUPPLY CASE A CORRECT METHOD USING A DIFFERENTIAL SCOPE WITH FLOATING INPUT GROUND CURRENT PATH IS BROKEN COMMON MODE REJECTION OF DIFFERENTIAL INPUT SCOPE IGNORES DIFFERENCE iN GROUND POTENTIAL OF POWER SUPPLY amp SCOPE SHIELDED TWO WIRE FURTHER REDUCES STRAY PICK UP ON SCOPE LEADS Figure 5 4 Ripple and Noise Test Setup 5 26 The same ground current and pickup problems can exist if an RMS voltmeter is substituted in place of the oscilloscope in Figure 5 4 H
75. that include Change 4 The HP Part No o the type AIH lamp s 2140 0244 Add to the parts list the mating plugs for the front panel output connectors They are type BNC HV male coaxial plugs HP Part No 1250 0927 Two are provided Effective January 1 1977 Options 005 50Hz ac input and 018 230 Vac Input are no longer avail able separately as standard options for this model These two options have been replaced by a new standard option Option 019 which combines the madifications of Options 005 and 018 for use with 230 Vactl0 50 50 3Hz input After January 1 Model 6110A instruments for use with 115Vac 50Hz input or a 230Vac 60Hz input must be ordered as special factory modifications Make the nec essary corrections wherever Option 005 or 018 is mentioned the manual STANDARD color scheme of light gray and blue gray Option A85 designates use of a light gray front panel with olive gray used for all other external surfaces New part numbers ara shown below HP PART NO OPTION A85 OPTION X95 06110 00001 ERRATA Under the heading Controls in Table 1 1 change the resolution specification to 20 millivalts The blue gray meter bezel has been replaced by a black one HP Part No 4040 4414 CHANGE 8 Make the following changes to the schematic and the parts Hst change R7 the overvoltage protection cireuit to 20k 10 Part No 2100 0558 change R25 and R67 in the meter circuit t
76. the circuit board apply heat on com ponent side of board If bu lead of com ponent does not pass through an eyelet apply heat to conductor side of board CONDUCTOR 4 Hold part against board avoid overheating 3 Bend clean tinned lead on new part and carefully insert through eyelets or holes in board and solder leads Apply heat to compo nent leads on correct side of board were a LRL as explained in step 1 In the event that either the circuit board has been damaged or the conventional method is imprac tical use method shown below Thisis especially applicablefor circuit boards without eyelets 1 Clip lead as shown below 2 Bend protruding leads upward Bend lead of new APPLY component SOLDER around pro truding lead Apply solder using pair of long nose pliers as a heat sink 777272288 7777777777772777777772 Mamm This procedure is used in the field only as an alternate means of repair Itis not used within the factory Figure 5 11 Servicing Printed Wiring Boards 5 61 ADJUSTMENT AND CALIBRATION 5 62 Adjustment and calibration may be required after performance testing troubleshooting or pair and replacement Perform only those adjust ments that affect the operation of the faulty circuit and no others 5 63 OUTPUT VOLTAGE ZERO AND TRACKING 5 64 To adjust the output voltage so that it tracks the setting of the VOLTAGE controls from zero to 3000V proceed as
77. tmeter used to measure the output voltage change of the sup ply should be placed outside the oven and should have a long term stability adequate to insure that its drift will not affect the overall measurement accuracy 5 45 To check the temperature coefficient pro ceed as follows a Connect the load resistance attenuator and differential voltmeter as illustrated in Figure 5 3 b Adjust fr nt panel VOLTAGE thumbwheel switches until the front panel voltmeter indicates 3000 Vde c Insert the power supply into the temper ature controlled oven differential voltmeter remains outside oven Set the temperature to 30 C and allow 30 minutes warm up d Record the differential voltmeter indica tion Raise the temperature to 40 C and allow 30 minutes warm up f The differential voltmeter indication should change by less than 0 35mV from indication recorded in step d 5 46 OUTPUT STABILITY Definition The change in output voltage for the first eight hours follewing 30 minute warm up period During the interval of measurement all parameters such as load resistance ambient tem perature and input line voltage are held constant 5 47 This measurement is made by monitoring the Output of the power supply on a differential volt meter or digital voltmeter over the stated measure ment interval a strip chart recorder can be used to provide permanent record A thermometer should be placed near the supply to v
78. trument operation NEM REMLETY PACKARD TCR d n Lm rm voLim wen 559 Figure 2 1 2 7 INSTALLATION DATA 2 8 The instrument is shipped ready f r bench operation It is necessary only to connect the in strument to a source of power and it is ready for operation 2 9 LOCATION 2 10 This instrument is air cooled Sufficient space should be allotted so that a free flow of cooling air can reach the sides and rear of the in strument when it is in operation It should be used in an area where the ambient temperature does not exceed 559C 2 11 RACK MOUNTING 2 12 This instrument may be rack mounted in a standard 19 inch rack panel either alongside a similar unit or by itself Figures 2 l and 2 2 show how both types of installations are accom plishad METER rr 9 Bre Rack Mounting Two Units r YOLTAGE COARSE FINE METER CURRENT VOLTS AMPS UO Figure 2 2 Rack Mounting One Unit 2 13 To mount two units side by side proceed as follows a Remove the four screws from the front panels of both units b Slide rack mounting ears between the front panel and case of each unit c Slide combining strip between the front panels and cases of the two units d After fastening rear portions of units to gether using the bolt nut and spacer replace panel screws
79. ue to their limited use and in Sulation problems at 3 000Vdc For safety insure that the power supply chassis is grounded either via power cord or by other means The operator can ground either output terminal or operate the power supply up to 1 000 volts dc off ground floating It is not recommended that the power supply be floated above 300 volts rms at low audio frequen cies less than 500Hz WARNING Serious injury to personnel can occur if the power supply chassis is ungrounded The warranty is void if the chassis is ungrounded during operation NOTE This supply emits a ticking sound which is characteristic of normal operation It in no way indicates that the power sup ply is malfunctioning 3 5 CURRENT LIMIT PROVISIONS 3 6 The current limiting feature is designed to protect the power supply and the load It is fac tory adjusted by selecting resistor R20 so that the Short circuit output current will not exceed ap proximately 8mA 3 7 OPERATION OF SUPPLY BEYOND RATED OUTPUT 3 8 The shaded area on the front panel meter face indicates the amount of output voltage that is available in excess of the normal rated output Although the supply can be operated in this shaded region without being damaged it cannot be guar anteed to meet all its performance specifications However if the line voltage is maintained above 115Vac the power supply will probably operate within its specifications 3 9 LOAD CONNECTION 3 1
80. ust the Variac for 127Vac Set the output VOLTAGE controls for 3000Vdc d Turn overvoltage potentiometer R71 clockwise until neon light VR3 is on then turn R71 slowly counterclockwise until VR3 extinquish as 5 75 OVEN CONTROL CIRCUIT 5 76 To calibrate the oven control circuit that it maintains the proper oven temperature proceed as follows a Disconnect the jumper between test points 51 and 15 b Connect 14 1 resistor across test points 52 and 15 Seta decade resistance box to 10K and connect in place of R56 d Connect an oscilloscope across the heater test points 53 and 84 e Adjust the oscilloscope for 2mS cm and 5V cm and ensure that the oscilloscope terminals are not grounded f Observe the oscilloscope to determine if the heater is on or off If the heater is on a mul tiple square wave will appear however if the heat er is off a dc line will appear on the oscilloscope g If the heater is off decrease the decade resistance until it turns on If the heater is on increase the decade resistance until it turns off The decade resistance should be between 5K and 15K h Solder the nearest value watt carbon composition resistor determined in step g across the R56 terminals 1 Reconnect the jumper to test points 51 and 15 j Check the oven cycling rate Each on and off period should be approximately 10 to 15 seconds as observed on the oscilloscope 5 77 CU
81. ut terminals positive voltage applied to negative terminal the diode will conduct shunt ing current across the output terminals and limit ing voltage to the forward voltage drop of the diode This diode protects the series transistors and the output electrolytic capacitors REFERENCE REFERENCE SUPPLY REGULATOR CONTROL CIRCUIT HEATER CURRENT SAMPLING SERIES RESISTOR 2007 REGULATOR 25 CURRENT METER PROTECTION UIT 4448 LIMIT CIRC CR32 DC OUTPUT DRIVER AND VOLTAGE CONTROL ERROR INPUT AMPLIFIER CIRCUIT HIGH VOLTAGE DOUBLER 0 3 2KV VOLTAGE CONTROL CONTROL CIRCUIT Figure 4 1 Overall Block Diagram SECTION IV PRINCIPLES OF OPERATION 4 1 OVERALL BLOCK DIAGRAM DISCUSSION Figure 4 1 4 2 Models 6110 and 6516A as illustrated in Figure 4 1 are constant voltage current limited power supplies that utilize a piggy back regu lator design This design extends the usefulness of the series regulating transistors rated for ap proximately 30 volts to short circuit proof power supplies rated for 3 000 volts The basic tech nique consists of placing the well regulated low voltage piggy back supply in series with less well regulated high voltage doubler Notice however that the amplified error signal from the voltage input circuit is dependant upon the total output voltage not just the output of the piggy back supply alone Thus the well regulated bpiggy back supply continuousl
82. y Diode zener 9 4V 500MW Neon Front Panel Side chassis right ass y Side chassis right Side chassis left ass y Side chassis left Rear chassis ass y Capacitor clamp Print circuit board bracket Trim strip Heat Sink U type Cover Assembly P C Bd Board printed circuit Meter 21 DUAL SCALE 0 3 5KV 0 7 MIL AMP Spring Bezel 1 6 MOD Lock washer Knob insert pointer Heat Sink x r2 b FF EB 5138 8225 2045 54 61681 26 0685 5135 0686 8225 0686 2045 3101 0100 3100 1906 See parts listed below marked with an 06110 60001 310A 1N825 1N2163A NE 76 1920 02 00 2480 NF 207 HLAB Ultronik HLAB R C L HLAB Transitron Semcor HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB HLAB 09182 05347 09182 01686 09182 01686 03877 06751 03508 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 09182 Shakeproof 78189 Wakefield 09182 05820 06110 60003 0811 1981 5060 6107 0811 1997 5060 6106 0811 1994 0811 1976 06110 60002 9100 1811 9100 1812 1902 1221 1902 0763 2140 0019 06110 00001 5060 6103 5000 6020 5060 6102 5000 6021 5000 6022 5000 6023 5000 6024 5000 6026 5000 6025 5000 6027 06110 60020 06110 20020 11
83. y compensates for any ripple load regulation or line regulation deficiencies of the high voltage doubler and ad justs the voltage across the series regulator so that the total output voltage remains constant despite disturbances in the high voltage doubler 4 3 For purposes of discussion the voltage values of Model 6110A are used in the following paragraphs however the theory pertains equally well to both Models 6110A and 6516A The biggy back supply develops 200 volts and the high voltage doubler supply is capable of provid ing a maximum of 3200 volts With 30 volts nor mally dropped across the series regulator the maximum output of this supply is 3370 volts 170 volts from the piggy back supply and 3200 volts from tha high voltage doubler Thus the series regulator of the piggy back supply has a voltage range f r accomplishing the dynamic changes nec essary to compensate for the variations of the power source Short circuit protection for the series regulator in the piggy back supply is provided by the protection diode which provides a discharge path from the positive side of the power supply to the positive side of the high voltage doubler shunting the short circuit current around the series regulator Whenever the load resist ance decreases to a value such that 5 becomes greater than 200 volts the protection diode con ducts This prevents the output terminals of the piggy back supply from ever reversing pol
84. yed j Sterting from the major graticule division representative of time zero count to the right 50 psec and vertically 10mV Recovery should be within these tolerances as iliustrated in Figure 5 8 5 39 OUTPUT IMPEDANCE Definition At any given frequency of load change AEQUT AIQUT The definition applies only for a sinusoidal load disturbance unless of course the measurement is made at zero frequency DC The output impedance of an ideal constant volt age power supply would be zero at all frequencies while the output impedance for an ideal constant cur rent power supply would be infinite at all frequencies 5 40 The output impedance of a power supply is normally not measured since the measurement of transient recovery 11 reveals both the static and dynamic output characteristics with just one measurement The output impedance of power Supply is commonly measured only in those cases where the exact value at a particular frequency is of engineering importance AC VOLTMETER AC VOLTMETER 4038 Q 4038 INDICATES Eg INDICATES EIN POWER SUPPLY UNDER TEST OSCILLATOR 200K I 2W Figure 5 9 Output Impedance Test Setup 5 41 To check the output impedance proceed as follows a Connect thetest setup shown in Figure 5 9 The best method of connecting the load resistor oscillator and AC voltmeter to the power supply is with two tee connectors on each power supply ter minal Clip lead connections

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