Home

Instek GDM-8261 Digital Multimeter

1. I nmin lim a lla I E dl kun TB a D o O Cy ay a Ie gt Le 264 4 350 3 a Tj p se ee B 490 DOLE BAR B 90000606 h 220 325 1 220 G ooooooood9l 2 re 00000000 Oo g m o D 2 rO L ad 19 72 The cave depth 2 5mm _ 76 8 57 M4 X 0 7 NN o Te o 5 4 Places R xx SA 13 EE Ta T b Foe z O oe 4 d I 5 F 3 m TEN 4 e TL L 2982020209020909 All dimensions are 0 0P0 0 shown in millimeters 201 9 191 GW INSTEK GDM 8261 User Manual
2. 5 9 LHLHLHLHLHLHLHLH e GE gt dD dd D D D b b b D b b D NG o o GS GS GD GD Gb GD GD Gp Gb GD Gb Gp AP AP Gp GP vA m ap GD GD GD Gp GP do HLHLHLHLHLHLHLHL OR HLHL CHI 10 11 12 13 14 15 16 AMPS LO CH17 18 AMPS HI Overview 16 general purpose channels are available 8 on the left row 8 on the right row Current ACI DCI measurement uses 2 extra channels All channels are fully isolated Hi and Lo Scan Step Refer to the below table for measurement and test line connection connections ltem No of wires No of channels DCV ACV 2 wires H L 16 CH1 16 DCI ACI 2 wires H L 2 CH17 18 2W Resistance 2 wires H L 16 CH1 16 4W Resistance 4 wires Input H 8 pair
3. dBm dB FILTER REL COMP INT EXT MATH krom Hz P span REL 1010 TRG 280 Overview Advanced Measurement Overview csscceecneenees 53 Refresh EE 53 Reading Indicator EEE SEE 54 Common Attribute Manual Automatic Triggering 54 dBm dB dBm dB Measurement cccssccesccesccescesccesceesens 55 VEE GLER EE 55 Measure Be ed 56 Max Min Max Min Measurement nannnnnnenennnnnnnnnnnnnnenenenenenen 57 Relative Relative Value Measurement rrarnnrnnarnnrnnernarvnnnnn 58 Hold Hold Measurement cccccsccesccecceeceecceecescosenees 60 Compare Compare Measurement essri 6 Math Measure MXFB EEE 64 Mea Ure DSP E manana 66 ME Percentage cipiciatensetce easier oteaag N 66 Statistics NNN 67 52 GY INSTEK ADVANCED MEASUREMENT Advanced Measurement Overview Background Advanced Measurement dB dBm Max Min Relative Hold Compare Math Refresh Rate Background Advanced measurement mainly refers to the type of measurement which uses the result obtained by one of the basic measurements ACV DCV ACI DCI 2 4W Diode Continuity Frequency Period and Temperature mm o om om Basic Measurement AC DCV_AC DCI 2JAW Hz P_ TEMP FI Refresh rate defines how frequently the GIDM 8261 captures and updates measurement data A faster refresh rate yields a lower accuracy and resolution A slower refresh rate yields a higher accuracy and resolution Consi
4. SEE EE 122 Configure USB Interface r rnnarnnnernnersnnersnnersnnee 122 Insert PET Lur 123 Configure GPIB Interface rrrrrrrnnnrnnnrrnnrrnnnnnrner 124 Configure RS 232C Interface rrarnnnrrnnrrnnernnnrnnnrr 127 Set the EOL Character oicccasteusasseicesecaadaciassarsdencwds 128 Set the Separation Character rnrrnarnarnnnnnannnnnnen 129 Set the Return Format ccccceccscseceecseeeceeceeenes 130 Command Nr 132 CONFigure Commands rernnernnnrnnnernnernnernnernnernnner 141 Secondary Display CONFigure2 Commands 143 Measure Commands rrarnnrnnrnnnnonnrnnrnernennennennenene 146 SENSe COMMANAS rrnnnnnnrnnrnennennennrnnrnernennennennener 149 CALCulate Commands unannsrsanenanuserig 162 TRIGger CommandsS ccssscescsscesscesccescceseessenes 165 SYSTem Related Commands rrwrnnannnnnrnannennonnnner 168 STATus Report Commands rrrrrnarnannnnrnnnnnnrnnnnnnrr 170 RS 232C Interface Commands rrnrnnunnarnnrnennenner 170 IEEE 488 2 Common Commands ccccceceeenees 170 ROUTe Commands rraonnrnnrnernennennennrnnrnernernennenere 172 121 GW INSTEK GDM 8261 User Manual Configure Interface Overview Interface type USB Device USB 1 1 or 2 0 TypeA female connector RS 232C D sub 9 pin male connector Baud rate 230400 115200 57600 38400 19200 9600 GPIB optional 24 Pin female GPIB port Return to Local In order to switch back to the Local oy
5. EG GCOUNT annnm mo thu LILILILILI tll Ist display Shows the current count number measurement 2nd display Indicates the count measurement mode MATH Indicates Math operation Press the 2nd key to cycle through the different statistical data D measurements LIN Teb MNeS Mer Ai be SST TEV COUNT Indicates the current measurement count MIN Indicates the minimum data value MAX Indicates the maximum data value AVG Indicates the mean average value STDEV Indicates the standard deviation of the data oe oe nee key and the me OUTPUT ey to stop or restart ON OFF measuring gt ee oP TTLENET LLP Tate ILLLUIN el LLULIIN I S Indicates the measurement has started P Indicates the measurement has stopped Press the SHIFT key and the 2 4W SHIFT EXIT MATH key to exit 69 GW INSTEK GDM 8261 User Manual System DISPLAY CONFIGURATION RATE FILTER MENU Aov ocv aci per AUTO maan 2ND Refresh Rate Refresh Rate Setting rrrrrnnnrnnrrnnnrnrnrnvnrrvnnrnvnnnnnen 71 View Serial Number sete ecnotensnetcncrseuce nenecenemssest ewes 71 Trigger Manual Automatic Triggering rrrrrrnnrrnervnervnrrvernn 72 Use External Trigger ccsccssccesccsscesccesccsscesseeecs 72 Set Trigger DN 74 Digital Filter SETE EET 75 EE 76 Display Display Light Setting rrrrornnornnornnrrnnr
6. cccceeeceeeees 97 Configure Scanner cate eens e eaten eee wyeeerareiaca ascens 97 Select Channel Group and Enable Scanner 99 EM 100 NE re 101 Scanner Configuration Record rrrnrnnnrrrnrnnernnn 103 Setup NNN 104 Setup Simple SAN eee 105 Setup Advanced Scan cccccccsccssccseceseceeceeeeecnaes 107 Use External Triggeru u munnet 110 Run GE EE ee en err ee ee ree 111 KUA SO Ser 111 Recall Scan Step Result cccssccsscsscessceeeeeecs 112 Setup and Run Monitoring esssssessessessessrserses 112 96 GW INSTEK SCANNER OPTIONAL GDM SC1 Scanner Specifications 2 wire channel 16 pairs Maximum current 2A ch17 ch18 4 wire channel 8 pairs Resistance 2 4 wire Single wire channel N A Cold junction N A internal Maximum voltage 250V Connection Screw terminal Scanner Installation Configure Scanner Open Scanner 1 Take off four screws from the bottom panel of the cover scanner 97 GW INSTEK GDM 8261 User Manual 3 The connection terminals are revealed CARD INPUT LO CARD INPUT HI CARD SENSE LO CARD SENSE HI CH 2 3 4 5 6 7 8
7. _ P he D k ice The RTD st ep the p display GW INSTEK BASIC MEASUREMENT noel og Up Down keys to select ICCO I LET 3 Open USER Press Enter The alpha coefficient type menu menu appears on the display er coefficient Use the Left Right key to move the cursor and use the Up Down key to change the coefficient value Default 0 00385 Press the Enter key to confirm the value and move onto to the next ENTER coefficient con firm Default Alpha 0 00385 Beta 00 10863 Delta 1 49990 Press the Exit key to cancel at any SHIFT EXIT time The display goes back to the cance previous menu 45 GY INSTEK GDM 8261 User Manual Duar MEASUREMENT Dual Measurement Background Example Dual Measurement Applications 46 The dual measurement mode allows you to use the 2nd display to show another item thus viewing two different measurement results at once When the multimeter is used in dual measurement mode both displays are updated from either a single measurement or from two separate measurements If the primary and secondary measurement modes have the same range rate and rely on the same fundamental measurement then a single measurement is taken for both displays such as ACV and frequency period measurements If the primary and secondary displays use different measurement functions ranges or rates then separate measurements will be taken for
8. AUTO ENTER As the AUTO key selects the sae measurement range automatically As the Enter key confirms the entered value SHIFT gt AUTO RATE Selects the measurement update RATE ee AUTO rate Slow Medium or Fast page ENTER Up Down Selects the parameter in various occasions higher da or lower LL RANGE ___J Cv HOLD HOLD Activates the Hold function page a SHIFT gt HOLD SAFN EAI COMP Activates the Compare COM Pare lt HOLD Measurement page 61 TRIG Trigger TRIG Triggers sample acquisition manually page 72 SHIFT gt TRIG STE EAN INT XT Selects the Internal or the External Int Ext Trigger trigger source page 72 Left Right HOLD TR Selects parameters in various menus KR O or ght 0 LL CHOICES REL REL Measures the Relative value page 58 SHIFT gt REL SHEEN REL Manually sets the reference value for RELative base an value measurement MX MN Measures the Maximum or the MAX MIN Minimum value page 57 SHIFT gt MX MN SHIFT EXIT FILTER Selects the digital filter type for the FILTER signal sampling page 75 15 GY INSTEK 2nd Display LOCAL SHIFT 2nd Menu 16 GDM 8261 User Manual SND As the 2nd key selects the measurement item on the 2nd display page 46 Pressing and holding for more than 1 second turns off the 2nd display LOCAL As the Local key releases the remote control and returns the instrument to
9. Consumption Dimensions 220 mm W X 88 mm H X 325 1 mm D Weight Approximately 3 1 kg 183 GY INSTEK DC Characteristics DC Voltage 24 Hour P Rangel 23 C 1 C 100 0000 mV 0 0030 0 0030 1 000000 V 0 0015 0 0004 10 00000 V 0 0020 0 0006 100 0000 V 0 0020 0 0006 1000 000 V 0 0020 0 0006 90 Day 23 C 5 C 0 0040 0 0035 0 0020 0 0005 0 0030 0 0007 0 0035 0 0006 0 0035 0 0010 GDM 8261 User Manual 1 Year Temperature 23 C 5 C Coefficient C 4 0 0050 0 0035 0 0005 0 0005 0 0035 0 0005 0 0005 0 0001 0 0040 0 0007 0 0005 0 0001 0 0005 0 0001 0 0005 0 0001 0 0045 0 0006 0 0045 0 0010 Accuracy Specifications of reading of range Resistance 4107 Test 24 Hour l 90 Day 1 Year Temperature Rangel Current 23 C 1 C 23 C 5 C 23 C 5 C Coefficient C 8l 100 0000 Q ImA 0 0030 0 0030 0 008 0 004 0 010 0 004 0 0008 0 0005 1 000000 kQ 1mA 0 0020 0 0005 0 008 0 001 0 010 0 001 0 0008 0 0001 10 00000 kQ 100A 0 0020 0 0005 0 008 0 001 0 010 0 001 0 0008 0 0001 100 0000 kQ q10uA 0 0020 0 0005 0 008 0 001 0 010 0 001 0 0008 0 0001 1 000000 MQ 3 5uA 0 002 0 001 0 008 0 001 0 010 0 001 0 0010 0 0002 10 00000 MO 350nA 0 015 0 001 0 020 0 001 0 040 0 001 0 0030 0 0004 100 0000 MQ 350 nA 0 300 0 010 0 800 0 010 0 800 0 010 0 1500 0 0002 10 MQ Accuracy Specifications of reading of range DC Cur
10. CONT 2nd display shows the title I Vo Connect the test lead between the Q nade and the COM port The display updates the reading Ge 35 GY INSTEK GDM 8261 User Manual Set Continuity Threshold Background Threshold Range 1 Activate threshold setting 2 Edit threshold 3 Go back to the default display 36 Continuity threshold defines the maximum resistance allowed in the DUT when testing the continuity 0 100082 102 resolution 10Q default SHIFT EXIT MENU 1 P the Shift key the 2nd key the Right ker The sk EG menu appears WAT FIL LEVEL I FIL TN EE he D key the Righ key the Enter key The ai 7 continuity threshold setting appears PP ENTER ere nem ee ioe HET IN I EEE FV iE IL I _ 7 7 re T NILI ie Move the cursor the ver HOLD TRIG 2 Change the value using the Up Down key Range 1 10000 102 resolution default 10Q SHIFT EXIT Press the Enter key to confirm the O edited threshold Press the Exit key enter to go back to the default display GY INSTEK BASIC MEASUREMENT Select Beeper Setting Background Beeper parameter 1 Activate beeper setting menu 2 Select the beep setting 3 Go back to the default display Beeper setting defines how the GDM 8261 notifies the continuity test result to the user When the Beeper setting is off it will also turn the keypad sound off Pass Be
11. EC Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD 1 No 7 1 Jhongsing Rd Tucheng Dist New Taipei City Taiwan R O C 2 No 69 Lu San Road Suzhou City Xin Qu Jiangsu Sheng China declare that the below mentioned product Type of Product Digital Multimeter Model Number GDM 8261 are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility 2004 108 EC and Low Voltage Directive 2006 95 EC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Directive the following standards were applied EN 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements 2006 Conducted amp Radiated Emission EN 55011 1998 A1 1999 A2 EN 61000 4 2 1995 A1 1998 A2 2002 Class B 2001 Current Harmonics Radiated Immunity EN 61000 3 2 2000 A2 2005 EN 61000 4 3 2002 A1 2002 Voltage Fluctuations Electrical Fast Transients EN 61000 3 3 1995 A1 2001 IEN 61000 4 4 2004 Electrostatic Discharge A2 2005 TT O aeoo asos t 2001 EN 61000 4 5 1995 A1 2001 TT Easton 96 A 2001 EN 61000 4 6 1996 A1 2001 EN 61000 4 8 1993 A1 2001 Voltage Dip Interruption EN 61000 4 11 2004 Safety Low Voltage Equipment Directive 2006 95 EC Safety Requirements IEC EN 61010 1 2001 192 G
12. Returns the diode measurement on the first display Example MEAS DIOD Returns the diode measurement MEASure TEMPerature TCOuple Returns the temperature for the selected thermocouple type on the first display Parameter NONE J BJE J K N S T Example MEAS TEMP TCO J gt 0 26348E 2 Returns the temperature 147 GW INSTEK GDM 8261 User Manual MEASure TEMPerature FRTD Returns the 4W RTD temperature for the selected sensor type on the first display Parameter NONE PT100 D100 F100 PT385 PT3916 USER Example MEAS TEMP FRTD PT100 gt 0 20050E 5 Returns the temperature MEASure TEMPerature RTD Returns the 2W RTD temperature for the selected sensor type on the first display Parameter NONE PT100 D100 F100 PT385 PT3916 USER Example MEAS TEMP RTD PT100 gt 0 20050E 5 Returns the temperature MEASure2 VOLTage DC Returns the DC voltage measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 VOLT DC gt 0 488E 4 Returns the DC voltage measurement as 0 0488 mV MEASure2 VOLTage AC Returns the AC voltage measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 VOLT AC gt 0 511E 3 Returns the AC voltage measurement as 0 511 mV MEASure2 CURRent DC Returns the DC current me
13. EXIT Press the Exit key to go back to the default display Set Reference Junction Temperature T CUP Background 1 Open reference junction menu 42 When a thermocouple is connected to the GDM 8261 the temperature difference between the thermocouple lead and the GDM 8261 input terminal should be taken into account and be cancelled otherwise an erroneous temperature might be added co ME SIM 0 50 C 0 01 C simulated The terminal temperature is manually defined by the user Default value 23 00 Press the Shift key then the TEMP SHIFT Ex T SENSOR Sensor key The sensor selection menu appears on the display Ha and select I CUP thermocouple Press Down Right arrow key and v rer v then Down again The reference junction selection menu appears on the display Press the Left and Right arrow keys GY INSTEK 2 Edit reference temperature BASIC MEASUREMENT SiN me E ALULI Use the Left Right key to move the cursor and use the Up Down key to change the value Default 23 00 Press the Enter key to confirm the value or the Exit key to cancel The ENTER confirm display goes back to the previous menu SHIFT EXIT cancel Select Temperature Sensor Type Background Parameter 1 Open sensor selection menu 2 Select sensor type The GDM 8261 supports a number of thermocouple types as well as 2 or 4 wire RTD It is important
14. display Frequency Period Settings Input Port Selection Background Panel operation The INJACK settings set which input port is used for frequency of period measurements Setting VOLT 1A 10A 1 Press the Shift key followed by ad dan the 2nd Menu key Press the right key three times The Frequency Period menu oe TRIG TRIG TRIG gt LEVET I 7 L EL I L Press the Down key twice The bg Y INJACK setting appears Phe Or IFT T ILIP EL V LIL I Ist display Indicates which input port is assigned as the input pott Fn a EEE Select the i ing th ra 87 GW INSTEK GDM 8261 User Manual 4 Press the Enter key to confirm SHIFT EXIT your selection Press the Exit ee key to go back to the default display Gate Time Setting Background The gate time settings determine the accuracy of the frequency and period measurements The gate time settings are the equivalent to the Fast Medium and Slow rate settings Setting 10ms 100ms 1000ms Rate Settings The gate time settings are analogous to the rate settings Function Digits Rate Readings s Gate time Frequency 6 Slow 1 1000ms pene 5 Med 10 100ms 4 7 Fast 100 10ms P operati ip the Shift kev followed b SHIFT EXIT MENU anel operation 1 Press the ey followed by the 2nd Menu key Press the EG right key three times The Hz P gt menu appears T
15. 100 mV For 10 mV to 100 mV inputs multiply of reading error x10 4 750 Vac range limited to 100 kHz 5 0 18C amp 28 55 C 189 GW INSTEK GDM 8261 User Manual Temperature Characteristics Display in C F Exclusive of probe errors RTD Accuracy based on PT100 100Q platinum PT100 D100 F100 PT385 PT3916 or user type Temperature Coefficient Range Resolution I Year 23 C 5 C 0 18 C amp 28 55 C 200 C 100 C 0 001 C 0 09 C 0 004 C C 100 C 20 C 0 001 C 0 08 C 0 005 C C 20 C 20 C 0 001 C 0 06 C 0 005 C C 20 C 100 C 0 001 C 0 08 C 0 005 C C 100 C 300 C 0 001 C 0 12 C 0 007 C C 300 C 600 C 0 001 C 0 22 C 0 009 C C Thermocouples Accuracy based on ITS 90 90 Day 1 Year Temperature Coefficient Type Range Resolution DIES 0 18 C amp 28 55 C E 200 to 1000 C 0 002 C 0 2 C 0 03 C C J 210 to 1200 C 0 002 C 0 2 C 0 03 C C T 200 to 400 C 0 002 C 0 3 C 0 04 C C K 200 to 1372 C 0 002 C 0 3 C 0 04 C C N 200 to 1300 C 0 003 C 0 4 C 0 05 C C R 50 to 1768 C 0 01 C 1 C 0 14 C C S 50 to 1768 C 0 01 C 1 C 0 14 C C B 350 to 1820 C 0 01 C pe 0 14 C C 1 Specifications do not include probe accuracy Relative to simulated junction 190 GW INSTEK APPENDIX Dimensions
16. 250V 180 GW INSTEK APPENDIX Menu Tree Menu Tree The menu tree diagram shown on the next page represents the configuration menu that is accessed by pressing the Shift key and 2ND Menu key The menu tree is arranged as a three level tree structure Background Menu Tree Navigation c voy mro Navigate between menus 019 ra SHIFT EXIT 162 3162 Sr Switch Exit from fonemer Access Level 2 Edit Level 2 Set Level 2 Configuration menu item menu item menu item and level 2 menu Continued next page 181 GW INSTEK GDM 8261 User Manual Configuration Menu Tree SHIFT EXIT MENU UT LEVEL 1 SYSTEM MEAS k SET ADC HZ P TXITERMK _ SCAN LEVEL 2 SIMPLE ADVAN MONITOR 9999ms 70000 LIGHT5 PARA 5 PARA 5 DELALL PARA 0 default 182 GW INSTEK APPENDIX Specifications General All specifications are ensured only under a single display e At least I hour of warm up time is required before AN applying these specifications Auto Zero on Auto Gain Note on Slow mode e Make sure the power ground is connected Power Supply 100 V 120 V 220 V 240 V 10 Power Line 45 Hz to 66 Hz and 360 Hz to 440 Hz Frequency Operating Full accuracy for 0 C to 55 C Full accuracy to 80 R H at Environment 40 C Storage 40 C to 70 C Environment Power Max 25VA
17. Characteristics 06 189 Temperature Characteristics rrrrnnnrnnnrnnvrnnersnen 190 DIENS ONS eee 44444444 191 EC Declaration EC Declaration of Conformity eesessessssssesessees 192 177 GY INSTEK GDM 8261 User Manual Firmware Version Background View firmware version 178 Firmware version is available from the system menu Firmware Shows the GDM 8261 firmware version version number 1 Press the Shift key followed by SHIFT EXIT MENU the 2nd Menu key The system gt menu appears LEVEL I EvETCM ois HET P he D key followed b or op of dg version menu appears 1 1 Woo LL EEL Press the Down key The firmware version appears I PERGI L Press the Exit key to go back to SHIFT EXIT the default display VWEOC Fi FUD LIN GW INSTEK APPENDIX Fuse Replacement Replace AC Source Fuse Steps 1 Take off the power cord and remove the fuse socket using a minus driver 2 Replace the fuse in the holder 3 Ensure the correct line voltage is lined up with the arrow on the fuse holder Insert the fuse socket Rating 0 315AT 100 120VAC 0 125AT 220 240VAC 179 GW INSTEK GDM 8261 User Manual Replace Input Current Fuse Step 1 Press the Fuse holder 2 The fuse holder comes out Replace the fuse inserted at the end of the holder input q AW yar A gENSF q MAX a po 10 et vit Hi A pr LO an Rating T1 25A
18. E sanne I amp AAAS 100 GW INSTEK SCANNER OPTIONAL 3 Bundle the wires at the front cover using the holes at the bottom 4 Close the top cover and tighten the screw from the bottom Configuration Print out the configuration record list on page 103 fill in Record the details and keep it with the GDM 8261 Insert Scanner Power Off Turn the Power Off and take out the power cord 101 GW INSTEK GDM 8261 User Manual Open the Take off the two screws on the slot corners to remove GDM 8261 rear the optional slot cover Keep the screws for later reuse panel slot JRSS NN Insert the Insert the scanner bottom side up already configured scanner according to the procedures on page 97 into the slot Close the cover by tightening the screws FE Power On 102 GW INSTEK SCANNER OPTIONAL Scanner Configuration Record Measurement Channel Wire color type Note CH H L cH aoo ee CH3 aooo eee CH4 9 eee CHS ee CHE gu cH aoo ee CHS aoo ee CH9 aooo e eee cmo O Booo CH1 H L CH12 H L nm CH ge CH14 H L me sn msn mn sn CARD INPUT H L CARD SENSE H L mes HL 103 GY INSTEK Setup Scan Overview Scan type Timer setting Count setting Trigger setting Scan operation 104 Simple Advanced GDM 8261 User Manual Sets the scanned channel range loop count and time
19. EXIT your selection Press the Exit gt ENTER key to go back to the default display Display On Off Setting key lock Background Panel operation The display can be turned off when not used for a long time Note that when this function is used the panel keys ate also locked except for the Output On Off key The display is turned on by default 1 Press the Output On Off key once The display will be turned off and the panel keys become locked panel keys press the Output 2 To on the display and enable the cal On Off key again Measurement Configuration Settings D Shift Settings Background Panel operation 78 The D Shift setting automatically shifts the decimal point depending on the measurement If D Shift is turned off the measured readings will be displayed at the full 6 digits with a fixed decimal place The D Shift setting is on by default D Shift On Off default On 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key followed by the Right key The MEAS menu appears ote GY INSTEK SYSTEM DISPLAY CONFIGURATION METTE LEVEL I IIL Press the down key followed by v res to enter the E mo Press the Down key The D Shift setting appears mae 4 LUI Ist display Shows the D Shift setting Select the setting using the Up Down keys Press the Enter key to confirm SHI
20. GDM 8261 User Manual Measure X 1 Activate 1 X Press the Shift key the 2 4W Math SHIFT EXIT MATH key the D k ice The 1 X six MV COC or II LOY 2 View 1 X Press the Enter key to view the 1 X measurement result ENTER AC AUTO S Pr Mi 19270 Li LTTE ML Ist display Shows the 1 X value 2nd display Indicates 1 X MATH Indicates Math operation Measure Percentage 1 Activate Press the Shift key the 2 4W Math SHIFT EXIT MATH Percentage key the Up key twice The Reterence gt setting appears The Percentage is calculated as a Reading Reference Reference x 100 2 Set the LLI reference number JV TT TFT NTN NEI A LEI LILI Ltt Ist display Shows the reference number 2nd display Indicates Percentage setting 66 GY INSTEK 3 View Percentage ADVANCED MEASUREMENT 1 Use the Left Right key to move the cursor flashing point between the digits and decimal point 2 Ch th t ing th 3 Press the Enter key to confirm editing ace DC AUTO S g Nag in 13 LIL Lt tht tis B Ist display Shows the calculated result 2nd display Indicates the Percentage measurement MATH Indicates Math operation Statistics Calculations Background 1 Activate Statistics The Analyze Stats menu allows you to make statistical calculations on a continuous or user defined number of measurement counts The measurements supported include Ma
21. IT ACI IT DCI IT 2 4W ren Hz P Teu Measurement ACV AC Voltage JPE DCV DC Voltage ACI AC Current DCI DC Current 2 4W 2 wire and 4 wire Resistance gt H Diode Continuity Hz P Frequency Period TEMP Celsius Fahrenheit Temperature Advanced Advanced measurement page 52 mainly refers to the measurement operation using the result obtained from one or more of the basic measurements Refresh Rate Background Refresh rate defines how frequently the GDM 8261 captures and updates measurement data A faster refresh rate yields a lower accuracy and resolution A slower refresh rate yields a higher accuracy and resolution Consider these tradeoffs when selecting the refresh rate For DC measurements the frequency of the refresh rate depends on the rate settings S M F and the ADC speed settings Accurate Quick page 86 For AC measurements the refresh rate S M F is directly tied to the AC bandwidth settings page 80 For further details please see the specifications 24 GY INSTEK Refresh Rate Readings s Selection steps BASIC MEASUREMENT Function S M F Continuity Diode 100 200 300 DCV DCI 100Q 5 60 240 100MQ Accurate DCV DCI 100Q 30 600 2400 100MQ Quick ACV ACI 1 2 3 38 30 sec reading Frequency Period 1 10 100 1 Press the Shift key followed by SHIFT EXIT RATE the AUTO RATE key The refresh rate switches to the next 2 The refresh rate indicator shows S SM 5F
22. MEAS2 PER MAX Returns the maximum period SENSe Commands SENSe TEMPerature TCOuple TYPE Sets thermocouple type Parameter Type BJ E J K N RIS T Example SENS TEMP TCO TYPE Sets the thermocouple to type J SENSe TEMPerature TCOuple TYPE Returns the thermocouple type Return parameter B E J K N R S T 149 GW INSTEK GDM 8261 User Manual SENSe JTEMPerature RJUNction SIMulated Set temperature simulation value Parameter lt NRf gt 0 00 50 00 Example SENS TEMP RJUN SIM 25 00 Sets the thermocouple junction temperature to 25 C SENSe JTEMPerature RJUNction SIMulated Returns temperature simulation value Return parameter lt NR1 gt 0000 5000 where 0000 0 00 C 5000 50 00 C SENSe JTEMPerature RTD TYPE Sets the 2W RTD sensor type Return parameter Type PT100 D100 F100 PT385 PT3916 USER Example SENS TEMP RTD TYPE PT100 Sets the 2W RTD sensor to PT100 SENSe TEMPerature RTD TYPE Returns the 2W RTD sensor type Return parameter PT100 D100 F100 PT385 PT3916 USER SENSe JTEMPerature RTD ALPHa Sets the 2W RTD Alpha coefficient Parameter lt NRf gt 0 10 Example SENS TEMP RTD ALPH 0 00385 SENSe JTEMPerature RTD ALPHa Returns the 2W RTD Alpha coefficient SENSe JTEMPerature RTD BETA Sets the 2W RTD BETA coefficient Parameter lt NRf gt 0 10 Example SENS TEMP RTD BETA 0 00495 SENSe TEMPerature RTD BETA Returns the 2W RTD BETA coefficient SENSe TEM
23. REFerence cosniscresssndosenstcadescencoentencehsnnsuinddemsracsbuapsnsewsteess 163 CALCulate REL REFerence ssisscevesosentsnsnsvedssnexdocaseavanesuenunedadenveleenanonsaiesnys 163 CALCulate LIMit LOWer eresnoresnvreenvrennvrsenseennsesnnseennsesnnsesnnsesnnsesnnsesnnseese 163 CACHE LIM LOVE eda 163 PN 163 AMEN sasiye a ad ni 163 CALCulate DB REFerence eksen 163 137 GW INSTEK GDM 8261 User Manual CALCulate DB REFerencee srmronnrrronnrorennreronvrrnnnnrrrnvrennnvrssnnvnsnnnvnsennvnrnn 163 CALCulate DBM REFerence ed 164 CALCulate DBM REFerence cccccessscessscceessccesseeceeecesssecesseeeesseeeesaees 164 CALCulate S TORE COUNT iseioiiisarsostrnsiapicssis roarai aneia ii roni 164 CALCUIATES TORE COUNE cccsasscessnnniovaastenessnaiceninossnnendsaynewavanravasnnvneneys 164 CALCulate AV ERage COUN Leben 164 CALCul te AVERage MINIMUM ssssesstaisnassncsnspssusdercesuccatmuauadensasacseasnacnnes 164 CALCulate AVERage MAXiIMUMD cccccesccesecessecsseceeeeseeceseeeseeeseeseaeeenes 164 CALCulate AVERage AVERagee ssccssscesscsssssesesssesenecescesstesenscessesneeenes 164 CALCulate AVERage PTPeak ssiscnssiiusassnbscavasiessncanvebeocoasissbeanielesauensseasanoalats 164 CALCulate AVERage SDEViation ccsccesscsstsserscesseseessesecsseesseesteeenes 164 CALCulate MATH MMFactor rorrrronnrroroonnrrrronnrreronnnvrrsnnnrnsrennvrrsnnnvnsnnnns 165 CALCulate MATH M MFactor sscscsscnccsswcseernncesbaisuatens
24. Sets operation complete bit bitO in SERS Standard Event Status Register when all pending operations are completed PSC Returns power On clear status Return parameter lt Boolean gt 0 1 O clear 1 don t clear PSC Clears power On status Parameter lt Boolean gt 0 1 O clear 1 don t clear RST Recalls default panel setup reset the device SRE Returns the SRER Service Request Enable Register contents SRE Sets SRER contents Parameter lt NR1 gt 0 255 Example SRE 7 Sets the SRER to 00000111 STB Returns the SBR Status Byte Register contents Example STB gt 81 Returns the contents of the SBR as 01010001 TRG Manually triggers the GDM 8261 171 GW INSTEK GDM 8261 User Manual ROUTe Commands ROUTe CLOSe Close a specified scanner channel Parameter lt NR1 gt 101 118 Example ROUT CLOS 102 Closes channel 102 ROUTe OPEN ALL Opens all scanner channels ROUTe MULTiple OPEN Enable all channels in a specified range Channels that are not in the range are not affected Parameter lt NR1 gt 101 118 Example ROUT MULT OPEN 105 110 Channels 105 to 110 are enabled ROUTe MULTiple STATe Returns the status of all the scanner channels that are open Return parameter 101 OFF 102 ON 103 ON etc ROUTe MULTiple CLOSe Disable channels in a specified range Parameter lt NR1 gt 101 118 Example ROUT MULT CLOS 105 110 Disables channels 105 110 ROUTe FUNCtion En
25. Sets the DC Current Auto range settings on off Parameter ON OFF Example SENS CURR DC RANG AUTO OFF Turns Auto range off for DC current measurements SENSe JCURRent DC RANGe AUTO Returns the DC current Auto range settings Return parameter 0 1 0 OFF 1 ON SENSe JCURRent AC RANGe AUTO Sets the AC Current Auto range settings on off Parameter ON OFF Example SENS CURR AC RANG AUTO OFF Turns Auto range off for AC current measurements SENSe JCURRent AC RANGe AUTO Returns the AC current Auto range settings Return parameter 0 1 0 OFF 1 ON SENSe RESistance RANGe AUTO Sets the 2W resistance Auto range settings on off Parameter ON OFF Example SENS RES RANG AUTO ON Turns Auto range on for 2W resistance measurements SENSe JRESistance RANGe AUTO Returns the 2W resistance Auto range setting Return parameter 0 1 0 OFF 1 ON 157 GW INSTEK GDM 8261 User Manual SENSe FRESistance RANGe AUTO Sets the 4W resistance Auto range settings on off Parameter ON OFF Example SENS FRES RANG AUTO ON Turns Auto range on for 4W resistance measurements SENSe FRESistance RANGe AUTO Returns the 4W resistance Auto range setting Return parameter 0 1 0 OFF 1 ON SENSe FREQuency VOLTage RANGe AUTO Sets the Frequency Auto range settings on off Parameter ON OFF Example SENS FREQ VOLT RANG AUTO ON Turns the Auto range on for the frequency function SENSe JFREQuency VOLTage RANGe AUTO Returns the frequency Auto ra
26. The indicator turns On AC AUTO S IE IE Jd HJI tide ti Reading indicator The reading indicator does not flash before triggering can be on or off After triggering the indicator flashes according to the external signal trigger timing Exit external Press the Shift key followed by the SHIFT EXIT INT EXT trigger Trig key The EXT indicator gt disappears and the trigger goes back to internal mode 73 GW INSTEK GDM 8261 User Manual Set Trigger Delay Background Trigger delay defines the time delay between triggering and measurement start The default is set at 10ms The delay settings are not supported when the optional scanner is installed Panel operation 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key the Right key the aD Down key The delay menu appears Tt 7 LLI 2 Press the Down key The delay setting appears re Lill E FEE EES Gres T coy d a he flashi wang the Lab Rak keys Change the value using the Up Down key 4 Press the Enter key to confirm SHIFT EXIT editing and press the Exit key NTER The display goes back to previous mode Range 0 9999ms Ims resolution 74 GW INSTEK SYSTEM DISPLAY CONFIGURATION Digital Filter Setting Overview Filter basics The GDM 8261 s internal digital filter converts the analog input signal into digital format before passing it to internal circuits for
27. When finished press the Enter key The Monitoring starts DC AUTO S NIN WH uN UWI x 113 GW INSTEK GDM 8261 User Manual Dicitat I O The rear panel Digital I O terminal outputs the result of Compare measurements to external devices COMP 1 ABEL Terminal Digital I O Terminal Configuration rrrrnnnrrnner 115 configuration Application Application Compare measurement 0668 116 Application External trigger rrrrrrnnernnrrnerrnernnenn 119 114 GW INSTEK DIGITAL I O Digital I O Terminal Configuration Background The digital I O terminal outputs the result of Compare measurements to control external devices By providing separate VCC power for the terminal the outputs can also be used as a power source for TTL and CMOS circuits Pin Connector type DB 9 pclae assignment female FAIL Out High Limit FAIL Out LOW Limit FAIL Out m EOM Out 6789 12345 VCC a PASS Out NC External Trigger In Digital chassis Ground Pinl VCC output 5V Serves as the power source for the external device logic Pin2 NC No Connection Pin3 Digital chassis Ground Pin4 External Trigger Input Accepts external trigger sionals For using external signals see page 110 Scanner or page 72 Configuration Pin5 9 Pins 5 9 use open collector outputs and thus require a pull up resistor for each pin The output resistor must have a minim
28. local panel operation page 122 MENU Enters the configuration mode for a 2ND System Settings Measurement oca Settings ADC Settings Frequency Period Settings I O Settings TX TERM Settings and Scanner Settings GW INSTEK GETTING STARTED Rear Panel Overview Digital I O Optional Power Cord Port Scanner Port Socket VG ED S Ene DD R is amp ASE i Ly I l Fuse Optional CAL Key USB Device RS 232C Communication port Port Port Port 0 315AT p n 0 125AT Power Cord N Accepts the power cord AC Socket 100 120 220 240V 10 45Hz 66Hz 360Hz 440Hz For power on sequence see
29. more than 10 Connect the protective grounding conductor of the AC power cord to an earth ground to avoid electrical shock GY INSTEK GDM 8261 User Manual Fuse type 0 315AT 100 120VAC Fuse AN WARNING Cleaning the 0 125AT 220 240 VAC e Make sure the correct type of fuse is installed before power up e To avoid risk of fire replace the fuse only with the specified type and rating e Disconnect the power cord before fuse replacement e Make sure the cause of a fuse blowout is fixed before fuse replacement Disconnect the power cord before cleaning GDM 8261 Use a soft cloth dampened in a solution of mild detergent and water Do not spray any liquid into the GDM 8261 Do not use chemicals or cleaners containing harsh material such as benzene toluene xylene and acetone Operation Environment Storage Environment Disposal e Location Indoor no direct sunlight dust free almost non conductive pollution Note below Temperature Full accuracy for 0 C to 55 C e Humidity Full accuracy to 80 RH at 40 C Note EN 61010 1 2001 specifies the pollution degrees and their requirements as follows The GDM 8261 falls under degree 2 Pollution refers to addition of foreign matter solid liquid or gaseous ionized gases that may produce a reduction of dielectric strength or surface resistivity e Pollution degree 1 No pollution or only dry non conductive pollution occurs
30. range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 RES 10e3 MIN Sets the range to 10kQ with the lowest resolution CON Figure2 FRESistance 144 Sets measurement to 4W Resistance on the second display and specifies the range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 FRES 10e3 MAX Sets the measurement mode to 4W with a range of 10kQ at the maximum resolution GW INSTEK REMOTE CONTROL CON Figure2 FREQuency Sets measurement to Frequency on the second display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 FREQ MAX MAX Sets the frequency measurement range to max and the resolution to max CONFigure2 PERiod Sets measurement to Period on the second display and specifies the range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 PER Sets the DMM to period measurement using the previous range resolution CONFigure2 OFF Turns the second display function off Parameter None CONFigure2 FUNCtion Returns the current function on the second display Return parameter VOLT VOLT AC CURR CURR AC RES FRES FREQ PER TEMP RTD TEMP TCO DIOD CONT NON CONFigure2 RANGe Returns t
31. rmsnnronvrrnrrrernrrnrn 98 UN 38 R Rear panel SAS EE 17 Recall instrument settingsS rrrrrrnrrrrnrrenernn 94 Recall measurementS rrnrrnrnrnrrnrrrnrrrrnnrrnsenn 92 Refresh rate errrrnnnnnnnvrrrrrvnnnnnnnnvrrvnvenvnnn 24 53 Refresh rate SEE TET NT AE 71 Relative value FU 58 Resistance scanner configuration rmsnronvrrnrrrernrnnrn 98 EN 32 RS 232C configuration rmrsrvrornrervrrnvvrnrer 127 S Safety instruction EEE NN 8 Line voltage EE 7 GY FO PE 6 Save instrument settings oseese 93 Save DAMA ds scarayedasovsseaasbrideawngeiseeatiaidcawnges 93 Scanner advanced SettingS ccssccsesccssrecsreeenes 107 command SOV veceisactecsenrionsavonenusnanceeewsstenes 172 get out of scanner MOde srmrsnrrrnvrrnrern 176 istallato eisirean 97 GE EE TR 104 Saera 111 simple settings rrssrernvrernvrernvrernvresnvreenee 105 Step OD EEE 111 LE EEE EE cane 110 Scanner configuration record log 06 103 Serial number SEE GET TE NT EE 71 Service COMA EE iooi 176 Specification conditions rrnrrrnnvernvrrnnvrnnns 176 Specifications AC characteristics mssrasnersarsranvrssnvrsanesee 186 measuring chacteristics nrsrnrrnrnrrn 188 GW INSTEK INDEX Operating characteristics rrrrrrrrrn 188 Thermocouple DC JUNCTION SeN sesetatssnneccerenstetuscsnsenuoneuntnds 42 characteristics mm 184 SERINE EEE 41 EE EE A 185 MN 19 Pre Leese 191 Trigger Frequency and Perio
32. the digital filter Parameter MOV REP Example SENS AVER TCON MOV Sets the digital filter to the Moving filter SENSe JAVERage TCONtrol Returns the current digital filter type Return parameter MOV moving REP repeating SENSe JAVERage COUNt Sets the digital filter count Parameter lt NR1 gt 2 100 MIN MAX Example SENS AVER COUN 100 Sets the digital filter count number to 100 SENSe JAVERage COUNt Returns the digital filter count Return parameter lt NR1 gt 002 100 SENSe JAVERage STATe Turns the digital filter On Off Parameter ON OFF Example SENS AVER STAT ON Turns the digital filter on SENSe JAVERage STATe Returns the state of the digital filter on or off Return parameter 0 1 0 OFF 1 ON SENSe JFREQuency APERture Sets the aperture time gate time for the frequency function 0 01 F 0 1 M 1 S Parameter 0 01 0 1 1 Example SENS FREQ APER 0 01 Sets the gate time to 0 01 seconds SENSe FREQuency APERture Returns aperture time gate time for the frequency function SENSe PERiod APERture Sets the aperture time gate time for the period function 0 01 F 0 1 M 1S Parameter lt NRf gt 0 01 0 1 1 Example SENS PER APER 0 1 Sets the gate time to 0 1 seconds for the period function 152 GW INSTEK REMOTE CONTROL SENSe PERiod APERture Returns the aperture time gate time for the period function SENSe JFREQuency INPutjack Assigns an input por
33. the number of samples Parameter None MIN MAX TRIGger COUNt Sets the number of trigger counts Parameter lt NR1 gt 1 9999 MIN MAX Example TRIG COUN 10 Sets the number of trigger counts to 10 TRIGger COUNt Returns the number of trigger counts Parameter None MIN MAX TRACe DATA Returns the buffer contents of the last logged recorded measurements TRACe CLEar Clears the buffer contents 167 GW INSTEK GDM 8261 User Manual SYSTem Related Commands SYSTem BEEPer STATe Selects the beeper mode no beep beep on fail and beep on pass Parameter lt NR1 gt 0 1 2 0 no beep 2 fail 1 pass Example SYST BEEP STAT 0 Turns the beeper off SYSTem BEEPer STATe Returns the beeper mode Return parameter Beep on Pass Beep on Fail No Beep SYSTem BEEPer ERRor Sets the beeper to sound on an SCPI error Parameter ON OFF Example SYST BEEP ERR ON Allows the beeper to sound when an SCPI error occurs SYSTem BEEPer ERRor Returns the beeper error mode Return parameter 0 1 0 OFF 1 ON SYSTem ERRor Returns the current system error if any SYSTem VERSion Returns system version Return Parameter X XX SYSTem DISPlay Turns the Display on off Parameter ON OFF Example SYST DISP ON Turns the display on SYSTem DISPlay Returns the status of the display Return parameter 0 1 0 OFF 1 ON SYSTem OUTPut FORMat Sets the output format for the VAL1 VAL2 TRACe DATA and FETC querie
34. the reading X by the factor M and adds subtracts offset B 1 X Inverse Divides 1 by the reading X Percentage Runs the following equation ReadingX Reference i Xx 100 Reference Stats Performs standard deviation calculations on measurement data Measure MX B 1 Activate MX B Press the Shift key followed by the SHIFT EXIT MATH 2 4W Math key The MX B gt setting appears 2 Set the factor My of M IMANARN FAE L LL Ist display Shows the factor M 2nd display Indicates MX B The letter M flashes 1 Use the Left Right key to move the cursor flashing point between the factor digits and decimal point 64 GY INSTEK 3 Set the offset B 4 View MX B ADVANCED MEASUREMENT 2 Ch h ine th gr hi a using the 3 Press the Enter key to confirm editing and move to offset ENTER setting TE r eee ore je jg ag me nanannan L OOOO O LILI Ist display Shows the offset B 2nd display Indicates MX B The letter B flashes 1 Use the Left Right key to move the cursor flashing point between the offset and dl M vi TT TT HAT OPE 2 Ch h ine th ne i hi a using the 3 Press the Enter key to confirm the editing The MX B ace measurement result appears DC AUTO S M WT U IOOIN 17 rat o o o o gt JOO tL C n Ist display Shows the calculated result 2nd display Indicates MX B MATH Indicates Math operation 65 GW INSTEK
35. voltage range press the 2nd key twice Auto range To turn the automatic range AUTO selection On Off press the AUTO key Manual range Press the Up or the Down key to select the range AUTO indicator turns Off automatically If the appropriate range is unknown select the highest range Range Frequency 3Hz 300kHz Period 3 3us 333 3ms Voltage 100mV 750V Range 39 GY INSTEK GDM 8261 User Manual Temperature Measurement Background 1 Activate temperature measurement 2 Temperature mode display appears 3 Connect the test lead and measure 40 The GDM 8261 can measure temperature using either thermocouples or RTD sensors For thermocouples the GDM 8261 accepts a thermocouple input and calculates the temperature from the voltage fluctuation The thermocouple type and reference junction temperature are also considered For RTD sensors the GDM 8261 calculates voltage based on the resistance of the chosen RTD For Celsius units press the TEMP key once sare ae TIPE d FELE th LILI thi AL C Indicates Temperature measurement TYPE J 2nd display shows the thermocouple RTD type Connect the sensor lead between the V and the COM port for thermocouple and 2W RTD measurements For AW RTD measurements also connect the sense HI and LO ports to the sensor The display updates the reading Thermocouple 2WRTD 4W RTD Q 4W INPUT SENSE VQ gt GY INSTEK Range BASIC M
36. 0 011 0 005 0 060 0 008 0 20 0 02 Temperature Coefficient C PI 0 1 0 006 0 035 0 006 0 015 0 006 0 03 0 006 GY INSTEK 10 00000 mA 100 0000 mA 1 000000 A 10 00000 A 3Hz 5Hz 5Hz 10Hz 10Hz 5kHz 5kHz 10kHz 3Hz 5Hz 5Hz 10Hz 10Hz 5kHz 5kHz 10kHz 3Hz 5Hz 5Hz 10Hz 10Hz 5kHz 5kHz 10kHz 3Hz 5Hz 5Hz 10Hz 10Hz 5kHz 5kHz 10kHz 1 1 0 06 0 35 0 06 0 15 0 06 0 35 0 7 1 0 0 04 0 3 0 04 0 1 0 04 0 2 0 25 1 0 0 04 0 3 0 04 0 1 0 04 0 35 0 7 1 1 0 06 0 35 0 06 0 15 0 06 0 35 0 7 APPENDIX 1 1 0 06 1 1 0 06 0 2 0 006 0 35 0 06 0 35 0 06 0 1 0 006 0 15 0 06 0 15 0 06 0 015 0 006 0 35 0 7 0 35 0 7 0 03 0 006 1 0 0 04 1 0 0 04 0 1 0 006 0 3 0 04 0 3 0 04 0 035 0 006 0 1 0 04 0 1 0 04 0 015 0 006 0 2 0 25 0 2 0 25 0 03 0 006 1 0 0 04 1 0 0 04 0 1 0 006 0 3 0 04 0 3 0 04 0 035 0 006 0 1 0 04 0 1 0 04 0 015 0 006 0 35 0 7 0 35 0 7 0 03 0 006 1 1 0 06 1 10 0 06 0 1 0 006 0 35 0 06 0 35 0 06 0 035 0 006 0 15 0 06 0 15 0 06 0 015 0 006 0 35 0 7 0 35 0 7 0 03 0 006 Accuracy Specifications of reading of range Additional Crest Factor Errors non sine wave l Error of reading Crest Factor 1 2 2 3 3 4 4 5 0 05 0 15 0 30 0 40 Additional Low Frequency Errors of reading Frequency 10Hz 20Hz 20Hz 40Hz 40Hz 100Hz 100Hz 200Hz 200Hz 1kHz gt IkHz Slow O D OQD 0D
37. 0D o AC Filter Medium 0 74 0 22 0 06 0 01 0 0 Fast 0 73 0 22 0 18 187 GY INSTEK Measuring Characteristics GDM 8261 User Manual True RMS AC Measurement AC coupled True RMS measures the ac Voltage Method component of input with up to 400 Vdc of bias on any range Crest Factor Maximum 5 1 at full scale AC Filter Slow 3 Hz 300 kHz Bandwidth Medium 20 Hz 300 kHz Fast 200 Hz 300 kHz Input I MQ 2 in parallel with 100 pF Impedance Input 750 Vrms on all ranges Protection True RMS AC Range Shunt Burden Voltage Current ImA 100Q lt 0 15V 10mA 5Q lt 0 07V 100mA 50 lt 0 7V 1A 0 10 lt 0 8V 10A 10mQ lt 0 5V Input Externally accessible 1 25A 250 V fuse Protection Internal 12A 250 V fuse Operating Characteristics Function Rate Digits Readings s AC Bandwidth ACV ACI Slow 64 1 2 sec reading 3 Hz 300 kHz Medium 5 3 38 20 Hz 300 kHz Fast 4 30 200 Hz 300 kHz 1 Specifications are for 1 hour warm up at 6 1 2 digits Slow ac filter sinewave input 2 Relative to calibration standards 3 20 overrange on all ranges except 750 Vac 10A range 4 Specifications are for sinewave input gt 5 of range For inputs from 1 to 5 of range and lt 50 kHz add 0 1 of range additional error For 50 kHz to 100 kHz add 0 13 of range 5 750 Vac range limited to 100 kHz 6 Typically 30 of reading error at I MHz 7 For frequencies below 100 Hz slow AC filter specif
38. 175 PAN rn 175 140 GW INSTEK REMOTE CONTROL CONFigure Commands CONFigure VOLTage DC Sets measurement to DC Voltage on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF VOLT DC 1 MAX Sets the voltage range to 1 volt and the resolution to the maximum CONFigure VOLTage AC Sets measurement to AC Voltage on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF VOLT AC Sets the AC voltage range and resolution to auto range CONFigure CURRent DC Sets measurement to DC Current on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF CURR DC 10e 3 DEF Sets the DC current to 10mA using the default resolution CONFigure CURRent AC Sets measurement to AC Current on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF CURR AC 10e 2 MAX Sets the measurement mode to ACI with a 100mA range at the maximum resolution CONFigure RESistance Sets measurement to 2W Resistance on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf g
39. AX SENSe VOLTage DC NPLCycles Sets the integration time for DC Voltage measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds For any lt NRf gt parameter the DMM will automatically set the PLC to the closest acceptable PLC value 0 025 0 1 0 25 1 2 12 Parameter NPLCycles lt NRf gt MIN MAX Example SENS VOLT DC NPLC 12 Sets the integration time to 12 PLCs for DC Voltage SENSe VOLTage DC NPLCycles Returns the integration time for DC Voltage measurement in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds Return parameter 0 025 0 1 0 25 1 2 12 SENSe CURRent DC NPLCycles Sets the integration time for DC Current measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds For any lt NRf gt parameter the DMM will automatically set the PLC to the closest acceptable PLC value 0 025 0 1 0 25 1 2 12 Parameter NPLCycles lt NRf gt MIN MAX Example SENS CURR DC NPLC 2 Sets the integration time to 2 PLCs for DC Current SENSe CURRent DC NPLCycles Returns the integration time for DC Current measurement in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds Return parameter 0 025 0 1 0 25 1 2 12 SENSe RESistance NPLCycles Sets the integration time for 2W resistance measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds For any lt NRf gt parameter the DMM will au
40. C cssasconsceorconsssevncaubneantoastisnentncedacntdseveaanitenerseeasennete 146 MEAS re CUR RGA AC EE aonane ana eaa an Re 146 MENSEN EE E 146 MEA SURG FRE SISTANCE sacssnsanccapstnnsessioncniiensiemmsbansdastnatddnnieinsdueeseseaibnsdnbtante 147 MEAS UF FREQUGHCY RR 147 IVE NNN 147 MEASURE CONTIMUIY scccssenanace weaiacatonsmanctunmatsnssonsedieenadespenntadcaseanesasobenics 147 ME DDE ane 147 MEASure TEMPerature TCOuple msrnrnnnnrnnnvrnnnrrrnvrernnrrrsnrersnrersnrersnnene 147 MEASure TEMPerature FRTD scissacsuwoveseasousnacndiocwasancuna saamensadceucvaseaininennas 148 MEASure TEMPerature RTD scsscassicsstensesssncateeatodeunisndetanestaceeeistancianebeuscs 148 MEASUFE2 VOLTAGE DC aisic cissoranntstdtesnnsastionneeddonanoamevunibanibonbsnscivensaatints 148 MEAS UFE2 VOSS NO os sednnscssucescavnembsossnduareauedmenustasetussaeasnasdecopualneance 148 STEGET DE 148 MEAS UP CURREN e 148 MATE Tee 149 ME SMS GLE 149 ME Ede 149 MR s 149 SENSe JTEMPerature TCOuple TYPE nnsnnnrenrnrenrnnenrrrenrerenrnssrrrsenresennne 149 SENSe TEMPerature TCOuple TYPE 1 nnnnnnrnrrrenrrrnvrrnrrrervrrnvrrrrrrensrennennn 149 SENSe JTEMPerature RJUNction SIMulated s resnnnonnrnrnrnnrnrnnenrenenernn 150 SENSe TEMPerature RJUNction SIMulated srrnnnrnrrrnrrrnrrrvnrrennrnnr 150 SENSE TEN Perature RTD TYPE ciscacivoasinnttmnctnsivaritiennndueacubivedcesbiienciins 150 SENSe TEMPerature RTD TYPE rmrreonrsorveorvrenvrsrseenersnvsse
41. CV Measures AC Voltage page 26 SHIFT gt ACV SHIFT EXIT SCAN Starts the optional scan SCAN measurement page 104 13 GY INSTEK DCV SHIFT gt DCV STEP ACI SHIFT ACI RECALL DCI SHIFT gt DCI STORE 2 4W Resistance SHIFT 2 4W MATH gt Diode Continuity SHIFT gt r dBm Hz P Frequency Period SHIFT Hz P dB TEMP Temperature SHIFT TEMP SENSOR 14 38 GDM 8261 User Manual DCV Measures DC Voltage page 26 SHIFT EXIT STEP Starts the step measurement page 104 using the optional scanner ACI Measures AC Current page 30 SHIFT EXIT RECALL Recalls a normal measurement gt result standard deviation measurement readings page 92 or scan measurement results page 112 DCI Measures DC Current page 30 SHIFT EXIT STORE Stores a measurement result page C vci 91 SHIFT EXIT MATH Enters the Math measurement mode zaw page 64 SHIFT EXIT dBm O gt e Measures 2 wire or 4 wire Resistance page 32 Tests Diode page 34 or Continuity page 35 Measures dBm page 55 Measures Frequency or Period page SHIFT EXIT dB a Gnd TEMP SHIFT EXIT SENSOR Selects the type of thermocouple gt used in the Temperature measurement page 41 Measures dB page 56 Measures Temperature page 40 GW INSTEK GETTING STARTED Measurement Keys lower row
42. Diode measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS DIOD RES 0 1e 4 Sets the Diode resolution to 0 00001 SENSe JDIODe RESolution Returns the Diode measurement resolution Parameter None MIN MAX SENSe JTEMPerature TCOuple RESolution Sets the thermocouple T CUP measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS TEMP TCO RES MAX Sets the thermocouple resolution to the maximum SENSe JTEMPerature TCOuple RESolution Returns the thermocouple measurement resolution Parameter None MIN MAX SENSe TEMPerature FRTD RESolution Sets the 4W RTD measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS TEMP FRTD RES MAX Sets the 4W RTD resolution to the maximum SENSe TEMPerature FRTD RESolution Returns the 4W RTD measurement resolution Parameter None MIN MAX 160 GW INSTEK REMOTE CONTROL SENSe TEMPerature RTD RESolution Sets the 2W RTD measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS TEMP RTD RES MAX Sets the 2W RTD resolution to the maximum SENSe JTEMPerature RTD RESolution Returns the 2W RTD measurement resolution Parameter None MIN M
43. Dual Measurement Multimeter GDM 8261 USER MANUAL GW INSTEK PART NO 82DM 82610EA1 per ISO 9001 CERTIFIED MANUFACTURER GW INSTEK This manual contains proprietary information which is protected by copyrights All rights are reserved No part of this manual may be photocopied reproduced or translated to another language without prior written consent of Good Will company The information in this manual was correct at the time of printing However Good Will continues to improve products and reserves the right to change specifications equipment and maintenance procedures at any time without notice Good Will Instrument Co Ltd No 7 1 Jhongsing Rd Tucheng Dist New Taipei City 236 Taiwan R O C GW INSTEK Table of Contents Table of Contents SAFETY INSTRUCTIONS re 6 Y SVD ONS EE 6 Safety Guidelines sessenssessessenserssesserssesserssessesse 7 GETTING STARTED oeer ronnen on nena E OENE E 10 GDM 8261 Characteristics cccccccceecceeeeeeenes 1 Front Panel Overview ccceccsscceecceeceseeeeeaeeeeees 12 Rear Panel Overview cccceccsecceecceeceeeeeeeaeeeeees 17 UN 19 BASIC MEASUREMENT 1 eesesenenenenenenenenenenenenenenenenenenenenenene 22 Basic Measurement Overview rrrnrnananvnnnnnnvnenr 24 AC DC Voltage Measurement ceceeeeeee 26 AC DC Current Measurement 30 2W 4W Resistance Measurement 68 32 DodeT a ee one re nn ea eres 34 S TE SEG 35 Frequency Per
44. EASUREMENT RTD 200 C 600 C sensor dependent Thermocouple 210 C 1820 C sensor dependent Select Thermocouple Type Background Parameter 1 Open sensor selection menu 2 Select sensor type 3 Select sensor The GDM 826laccepts thermocouple inputs and calculates the temperature from the voltage difference of two dissimilar metals Thermocouple type and reference junction temperature are also considered Thermocouple Range Resolution E 200 to 1000 C 0 002 C J 210 to 1200 C 0 002 C T 200 to 400 C 0 002 C K 200 to 1372 C 0 002 C N 200 to 1300 C 0 003 C R 50 to 1768 C 0 01 C S 50 to 1768 C 0 01 C B 350 to 1820 C 0 01 C Press the Shift key then the TEMP SHIFT EXIT SENSOR Sensor key The sensor selection menu appears on the display E LELEL I Press the Left and Right arrow keys and select T CUP thermocouple I Jl Lt op N LIV EN sf I Press the Down key twice The X X dd sensor selection menu appears on the display any aay mr eum km mm nm T I LIT TI UT LI gt SSD mn 6 9 DF T JE _ 41 GY INSTEK a GDM 8261 User Manual 4 Select sensor type 5 Confirm and go back to the default display Press the Up Down key The thermocouple type switches to the next one feeble ok ihe LleaDVolWel eet oe Hel Press the Enter key to confirm SHIFT
45. ESOIution rmennerennrvrenrvernrnrenrvrrnrnernrneen 160 SENSe TEMPerature FRTD RESOIlution ervrrevrervrrrrvrrrrrerrrrverener 160 SENSe JTEMPerature RTD RESolution errnrrnrnronrnrrnrnvenrnrrnrnsennneennnennn 161 SENSe TEMPerature RTD RESolution rmrennrrnvrrrnrervrrnvrrrrrrernrrnvernen 161 SENSe VOLTage DC NPLCYcles cccsscscssssssesessesesseseseeserenserenserenees 161 SENSe VOLTage DC NPLCycles cccscccscssesstscesecssecsseesensceseessnssenes 161 SENSe JCURRent DC NPLCycles rorsarorennvrsnnvssnnvrsnnersnnessnnessansssanesennseese 161 SENSe CURRent DC NPLCycles cccsscsssessssesceseesseesensceseesseesenes 161 SENSe RESistance NPLCYCcles nenneasnnresnrresnnresnnresnnresnnsesnnsesnnesnnsssnnsesnnse 161 SENSe RESistance NPLCycles cccccsccsssssstscesscsseesstscesceseeessesnesenes 162 SENSe FRESistance NPLCYycles n rsarersnnvrsanvrsnnsesnnresnnresnnsesnnsesnnsesnnseese 162 SENSe FRESistance NPLCyclese ccsscsssssecesstscescsssessresensceseesseesenes 162 CAL Culiate UNC ION sso ccsoninerseannsnocenonsannteotevasetactdactsaoscuentisadsatcaedcentoecader 162 ee WIN CLG ie otiosuse oiae aa 162 CAkculake STA Ereann E E E E EEE ancy sus 162 MN 162 CALC GAGS MN os sccusoaenmeninsinindalsstoisancbinben suc siotisnachinsonedisacinhashtesuasiesiende 162 CAL CULAR SIA GE 162 CALCullate HOLD REFFEN Gu eek kanne 163 CALCulate HOLD REFerence vare eie 163 CALCulate REL
46. FT EXIT your selection Press the Exit aoe key to go back to the default display Input Resistance Setting Background Panel operation The 0 1V and 1V DC voltage ranges can be set to an input resistance of 10MQ or 10GQ This setting is only applicable for DC Voltage only Input 10MQ 10GQ default 10M Resistance 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key followed by the Right key The MEAS menu appears e 79 GY INSTEK GDM 8261 User Manual LEVEL MALL LIE TTS PIL TT Press the down key followed by v he right key three times Th Er nd nd I ALDIT I INJ LI resistance setting appears iy Ist display Shows the input resistance setting Up Down keys Select the setting using the Press the Enter key to confirm SHIFT EXIT your selection Press the Exit gt ENTER key to go back to the default display AC Bandwidth Setting Background 80 Sets the AC Bandwidth filter setting for AC measurements The Slow Medium Fast S M F rate settings are directly tied to the AC bandwidth settings Rate Digits Input Frequency Readings s 6 1 2 3 Hz 300 kHz 1 2 sec reading 5 20 Hz 300 kHz default 3 38 4 2 200 Hz 300 kHz 30 GY INSTEK Panel operation 1 SYSTEM DISPLAY CONFIGURATION SHIFT EXIT MENU pe gt TRIG I Titel I LEVEL I Press the Shift key the 2nd Menu key fol
47. ITAL I O 2 Ch th t ing th 3 Press the Enter key to confirm editing and move to the low o ENTER limit setting LUN EG JG ke gnnonann gt AALL LILI Ist display Shows the low limit value 2nd display Indicates low limit setting Set the low limit in the same way as in the high limit Press the Enter key to confirm editing The compare ENTER measurement starts right away ay PASS ra 1 PT ot gt IL t tt tht ae COMP Indicates Compare mode 2nd display Shows the compare measurement result Pass High or Low High If the 2nd display shows lt High the result is above FL the High limit Digital I O FAIL Out Pin 6 and HIGH Limit FAIL Out Pin 7 are activated Low If the 2nd display shows 1 TI Low the result is below LEN the Low limit 117 GW INSTEK GDM 8261 User Manual Digital I O FAIL Out Pin 6 and LOW Limit FAIL Out Pin 8 are activated Pass If the 2nd display shows I TITLE 1 Pass the result is staying I between the High and the Low limit Digital I O PASS Out Pin 5 is activated Timing Diagram for pins 5 8 when the Compare function is activated Pin 6 8 Output High limit Compare On Low limit Pin 5 PASS Out Pin 6 FAIL Out Pin 7 HIGH Limit FAIL Out Pin 8 LOW Limit FAIL Out Deactivate To cancel the Compare SHIFT EXIT COMP Compare measurement press the Shift key gt measurement followed by the Hold Comp key or simply activa
48. K Manual triggering ADVANCED MEASUREMENT Press the Trig key to trigger the measurement manually The trigger must be set to external EXT for manual triggering See page 72 dBm dB Measurement Applicable to Background Parameters Measure dBm Activate dBm dBm result appears Using the ACV or DCV measurement result the GDM 8261 calculates the dB or dBm value based on a reference resistance value in the following way dBm 10 x logio 1000 x Vreading Rref dB dBm dBmref Vreading Input Voltage ACV or DCV Vref Reference voltage obtained by Rref 1mW Rref Reference resistance simulating an output load dBmref Reference dBm value Press the Shift key followed by the SHIFT EXIT dBm s n key The Ist display shows dBm and the 2nd display shows the reference resistance ans J600 TILT NET td Me DO tht tee aa dBm Indicates dBm measurement 6000 2nd display indicates the reference resistance 55 GY INSTEK Select reference resistance Deactivate dBm measurement Measure dB Background GDM 8261 User Manual To change the reference resistance press the Up Down key The new resistance appears in the 2nd display The following is the resistance list 2 4 8 16 50 15 93 110 124 125 135 150 250 300 500 600 800 900 1000 1200 8000 To cancel the dBm measurement SHIFT EXIT dBm press the Shift key followed by the key or simply activate another measureme
49. NT EXT Trig key The EXT indicator appears gt on the display Press the Trig key to start triggering manually The reading indicator turns On Reading indicator The reading indicator stays On before triggering Exit external trigger 110 After triggering the indicator flashes according to the external signal trigger timing Press the Shift key followed by the SHIFT EXIT INT EXT Trig key The EXT indicator gt disappears and the trigger goes back to the internal mode GY INSTEK Run Scan Overview Scan operation type Run Scan Step Activate Scan Step SCANNER OPTIONAL Scan Measures all the specified channel ranges at each trigger event The timer settings page 106 apply to each scan Step Measures a single channel in the specified range at each trigger event The timer settings page 106 apply to each channel Monitor Continuously measures one channel 1 Press the Shift key followed by SHIFT EXIT SCAN the ACV key Scan or DCV key Step SHIFT EXIT STEP O e 2 The STO indicator turns On The Scan Step starts running and the data is recorded After running the predefined count the Scan Step stops running IT l DC AUTO S MIYATI l AL K STO Retrigger Restart To run the Scan Step again press Scan Abort Scan Step the Trig key The previous data is overwritten by the new Scan To abort Scan Step or to go bac
50. NTER 131 GW INSTEK GDM 8261 User Manual Command Syntax The commands are partially compatible with IREE488 2 1992 and SCPI 1994 standard Commands are NON case sensitive 1 Command Header Example CONF VOLT DC 10 MAX command E JUNI gt Single space 1 2 34 5 3 Parameter 1 4 Comma no space after comma 5 Parameter 2 Parr Boolean Boolean logic 0 or 1 Used for On 1 or example Off 0 command NRI Integer 0 1 2 Sew NR2 Decimal number 0 0 0 1 0 2 NR3 Floating point number 4 5e 1 8 5e 1 NRf Any NR1 NR2 or NR3 value MIN MAX The GDM 8261 automatically translates to the Minimum min or Maximum max value available DEF Default setting value Automat The GDM 8261 automatically translates the command parameter range Parameter into the closest available value gt selection Example 1 CONF VOLT DC 1 Sets the measurement item to DC Voltage and the range to 1V Example 2 CONF VOLT DC 2 Sets the measurement item to DC Voltage and the range to 2V There is no 2V range so the GDM 8261 selects the closest range 10V EOL Marks the end of a command line The following messages are in accordance with IEEE488 2 standard LF CR CR LF EOL user configurable see page 128 Message EOL or Command separator user configurable Separator excluding GPIB see page 129 132 GW INSTEK REMOTE CONTROL Square brackets denote function commands or parameters that can be omitted from the command o
51. Note To turn the automatic range AUTO selection On Off press the AUTO key Press the Up or the Down key to select the range AUTO indicator turns Off automatically If the range is unknown select the highest range Range Resolution Full scale slow rate 1009 0 1uQ 119 99990 TkO 140 1 199999kQ 10kQ 100802 11 99999kQ 100kQ 100uQ 119 9999kQ IMQ 1Q 1 199999MQ 10MQ 100 11 99999MQ 100MQ 10002 119 9999MQ For more detailed range see the specifications at page 183 33 GY INSTEK GDM 8261 User Manual Diode Test Background 1 Activate diode test 2 Diode mode display appears 3 Connect the test lead and measure 34 Diode test checks the forward bias characteristics of a diode by running a constant forward bias current approx 1mA through the DUT Press the key once i minne MOTH uU IUL L LIN i V Indicates Diode test DIODE 2nd display shows the title Connect the test lead between the INPUT V Q gt gt F and COM port Anode V Cathode COM The display updates G the reading EE GY INSTEK BASIC MEASUREMENT Continuity Test Background 1 Activate continuity test 2 Continuity mode display appears 3 Connect the test lead and measure Continuity test checks that the resistance in the DUT is low enough to be considered continuous of conductive nature Press the key twice bul morn bH LI LIN 4 QO Indicates Continuity test
52. OUNT Le 152 SENSE NVERSECOUNP Leed 152 BENSE VERE S TATE nere a arein 152 SENSE AV ERAS6 S TATE seccsuinsnsicanteaaenduseswennsiessuannseauaseonenniasnevoussuceaubusiennd 152 SEN58 FREQ ency PN 152 SENSe FREQuency APERture i rreennrenrrsrvrenvrsnvvsnnveenvsensrsnvssnnssenssenvssnnsee 152 SENSe PERiod APERture csciecisocsesescusnscouansosnneniocsioonnsandenapnenaenmioncnweteras 152 SENSe JPERiod APERture ccssccesscotscescsscessessessceseeseesseneceseeseeesenes 153 SENSe JFREQuency INPutjack ceeccsseceseceseeeeseeceeeeeeeeeaeeesneeesaeeeees 153 SENSe FREQuency INPUtpack 0 cescecsseesseceseeeseeeseeceseceseeeseeeeseeseeesnes 153 SENSe PERIod INPutjack cscccssccssscccssccsesccssccsscserscserscserscssnsceones 153 SENSe JPERiod INPutjack ecccssecssecssecssecsececeseceseceseesseeeseeceseenseeesnes 153 SENSe DETector BAN Dwidth cccssccssrccsssccssccserccsssceserccssrsesencones 153 SENSe DETector BAN Dwidth eden 153 DENSE ZERO AUTO ekte 153 SENSE ZEROA er 153 DENSE GN AUT irinse aine E E EE 153 SENSE GAIN AUTO nsona E T 154 SENSe JCONTinuity THReshold rsnrnronnnnonrnrennnrenvnnenrnernrnrennneensnsennneen 154 SENSe JCONTinuity THReshold srennnnnnvronvrrnvrrnrnrervrrnvrrrrrrensrenvernnen 154 SEN Se CUR ROM DEN ve 154 SENSE CURRENT DETECT ud A 154 BEN DO An 154 FP I we soctocctvpasncpsnensectsseasecounesecagueewsnenerceepeovrieipsstovetneas 154 PRINT career cs
53. Perature RTD DELTa Sets the 2W RTD DELTa coefficient Parameter lt NRf gt 0 10 Example SENS TEMP RTD DELT 0 0000568 SENSe JTEMPerature RTD DELTa Returns the 2W RTD DELTa coefficient 150 GW INSTEK REMOTE CONTROL SENSe TEMPerature FRTD TYPE Sets the 4W RTD sensor type Parameter Type PT100 D100 F100 PT385 PT3916 USER Example SENS TEMP FRTD TYPE PT100 Sets the 4W RTD sensor to PT100 SENSe JTEMPerature FRTD TYPE Returns the 4W RTD sensor type Return parameter PT100 D100 F100 PT385 PT3916 USER SENSe JTEMPerature FRTD ALPHa Sets the AW RTD Alpha coefficient Parameter lt NRf gt 0 10 Example SENS TEMP FRTD ALPH 0 00385 SENSe JTEMPerature FRTD ALPHa Returns the 4W RTD Alpha coefficient SENSe TEMPerature FRTD BETA Sets the 4W RTD BETA coefficient Parameter lt NRf gt 0 10 Example SENS TEMP FRTD BETA 0 00495 SENSe JTEMPerature FRTD BETA Returns the 4W RTD BETA coefficient SENSe JTEMPerature FRTD DELTa Sets the 4W RTD DELTa coefficient Parameter lt NRf gt 0 10 Example SENS TEMP FRTD DELT 0 0000568 SENSe JTEMPerature FRTD DELTa Returns the AW RTD DELTa coefficient SENSe DETector RATE Sets the detection rate sample rate Parameter RATE S M F Example SENS DET RATE S Sets the rate to slow S SENSe DETector RATE Returns the sample rate Return parameter SLOW MID FAST 151 GW INSTEK GDM 8261 User Manual SENSe JAVERage TCONtrol Selects
54. RG TRG TRIG LEVEL LI 1 TT ILL NT 2 Press the Down key the right vio key and then the down key The gate time settings menu appears m Ist display Shows the gate time setting 3 Select th ing th p i aapa a using the 88 GW INSTEK SYSTEM DISPLAY CONFIGURATION 4 Press the Enter key to confirm SHIFT EXIT your selection Press the Exit ENTER key to go back to the default display 89 GW INSTEK GDM 8261 User Manual Store Reca The GDM 8261 can store and recall measurement history for up to 10000 counts as well as the instrument settings For storing and recalling measurement results using the Scanner see page 96 STORE RECALL Der jf act Store Measurement Record eecccccccrcscercrrrrrrrereen 9 Recall Measurement Record ccccccececeeeeeeee sees 92 Save Instrument Settings cece ee eeee tence ees 93 Recall Instrument SettingS cccccsscssscscceseneseees 94 90 GW INSTEK STORE RECALL Store Measurement Record Background The GDM 8261 can log up to 9999 measurement results counts which can be stored and recalled later for analysis Basic measurement statistics such as Maximum Minimum Average value as well as Standard Deviation are also recorded with the data Note Previously recorded measurements will be erased every time the store function is used or if power Is reset Data count 2 9999 Not applicable to Stor
55. SYSTEM DISPLAY CONFIGURATION current detect setting appears lt gt exe IT Ist display Shows the current detect setting 4 Select the setting using the Up Down keys 5 Press the Enter key to confirm SHIFT EXIT your selection Press the Exit gt ENTER key to go back to the default display ADC Setting Auto Zeroing Background Theory The Auto Zeroing A Zero function can be used in resistance TC RTD DCV and DCI measurements Auto zeroing is used to prevent measurements from drifting by taking offset measurements Setting Off On default On The combined offset from the input buffer A D driver and ADC is called the total offset Due to temperature variations inside the GDM 8261 the offsets for the Buffer A D driver and ADC vary over time and thus the total offset will also vary over time Auto Zero deducts this total offset from the measured sional to obtain a more accurate reading If Auto Zero is turned off this total offset will not be deducted from the measured signal Auto zero works in the following manner Internally the DMM will periodically short the Buffer s Hi and Lo input to obtain a total offset The frequency at which the offset is obtained depends on the sample rate 83 GY INSTEK Applicable Measurement Mode Rate and Speed settings Panel operation 84 GDM 8261 User Manual The diagram below shows how the total offset is obtain
56. The pollution has no influence e Pollution degree 2 Normally only non conductive pollution occurs Occasionally however a temporary conductivity caused by condensation must be expected e Pollution degree 3 Conductive pollution occurs or dry non conductive pollution occurs which becomes conductive due to condensation which is expected In such conditions equipment is normally protected against exposure to direct sunlight precipitation and full wind pressure but neither temperature nor humidity is controlled e Location Indoor Temperature 40 C to 70 C Do not dispose this instrument as unsorted municipal E waste Please use a separate collection facility or contact the supplier from which this instrument was purchased Please make sure discarded electrical waste is properly recycled to reduce environmental impact GW INSTEK SAFETY INSTRUCTIONS Power cord for the United Kingdom When using the GDM 8261 in the United Kingdom make sure the power cord meets the following safety instructions NOTE This lead appliance must only be wired by competent persons eons ING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code Green Yellow Earth Blue Neutral sf Brown Live Phase As the colours of the wires in main leads may not correspond with the coloured marking identified in your plug appliance proceed as follows The wite which is co
57. W INSTEK INDEX A Current scanner configuration ccesceeteeeteeeseeees 98 AC bandwidth SEP AEA A ENE 30 EE ee nee eee 80 Current auto detect ADC speed input DOM setting serioses reisseri 82 SEINE E E 86 D Auto gain SEINE senicure i a 85 dB Auto zero Jo a a 55 SN 83 Digital filter SG EE EE 75 j Digital I O Beeper Compare application 116 EN 37 oa Le Lg EE 115 EEE EE PE Ofkaaec tec 119 C Diode test scanner configuration rmrrnrrrrrrvrvrrnvernne 98 Command IEE488 2 commands 170 SL EEE A 34 Command set Display On Off ox counssaccascacedennteisnossntiondennsnannasiis 78 CALCulate commandsS rsnersnrrenrsorrsenrsn 162 Disposal instructions serevrrvrverevererveverenen 8 CONFigure commands rrnnrnnvnvrnvvnrvnrrenne 141 CONFigure2 commands arrovrovrrvrrennn 143 D Shift Measure commandS srrrrsrnnrvnvrrnrvvennnern 146 SEAT OE 78 Remote commands sesser 170 Dual measurement ROUTE commandsS sjarme 172 mete 46 SENSe commandsS resrearsaesvserveenversnrsersee 149 Ke NNN 48 Fr 170 ne ET NE ee je SYSTem related commands a 163 OV EFVIEWevsesseeccesssstnnsseesceccennnnnnssseeseenensnnnnen TRIGger commands eee 165 E Command syntax configuration EN 55011 declaration of conformity 192 OE 128 EN 61010 TE a cacnessnstareceesessastasesaceassaee 130 declaration of conformity 192 measurement category mmrnrrrrvorrrrrrrrrnerrnen 7 Separation Character 129 pollution deg
58. ables scan related functions Parameter OFF SCAN STEP Example ROUT FUNC SCAN Enables scan related functions ROUTe FUNCtion Returns the Scan related function status 172 GW INSTEK REMOTE CONTROL ROUTe CHANnel Advanced configuration mode for the scanner channels The channel function voltage and Auto range mode can be configured Parameter Channel lt NR1 gt Function String Range lt NRf gt Auto Function 1 VOLT 2 VOLT AC 3 CURR DCI 4 CURR AC ACI 5 CURR DCmA 6 CURR AC ACmA 7 RES 8 FREQ 9 TEMP TCO C 13 CONT 14 PER 15 TEMP TCO F 16 FRES 17 DIOD 18 TEMP RTD C 19 TEMP FRTD C 20 TEMP RTD F 21 TEMP FRTD F Range lt NRf gt Autorange 0 Off 1 On Range ON OFF Example ROUT CHAN 101 1 1 0 Sets channel 1 101 to VOLT 1 1V range 1 and disables Auto range 0 ROUTe CHANnel Returns the advanced channel configuration settings of each channel See the ROUTe CHANnel command for return parameters Return parameter Channel Function Range Auto Range Example ROUT CHAN 101 gt 101 VOLT 0 1 ON Returns channel 101 function is VOLT with range at 0 1V and Auto range on ROUTe COUNt Set the number of counts for the scan Parameter lt NR1 gt 1 999 MIN MAX Example ROUT COUN 50 Sets the scan count to 50 counts ROUTe COUNt Returns the number of counts for the scan Parameter None MIN MAX ROUTe DELay Set the Delay timer for the scan in milliseconds Para
59. al O1 13 Data I O 5 2 Datal O2 14 Datal O6 E 3 Datal O3 15 Datal O7 4 Datal O4 16 Datal O8 5 EOI 17 REN 12 24 6 DAV 18 Ground DAV oO 7 NRED 19 Ground NRFD 8 NDAC 20 Ground NDAC 9 IFC 21 Ground IFC 10 SRQ 22 Ground SRQ 11 ATN 23 Ground AN 12 SHIELD 24 Single GND Ground 126 GW INSTEK REMOTE CONTROL Configure RS 232C Interface Configuration 1 Press the Shift key the 2nd SHIFT EXIT MENU step Menu key the left key 2ND repeatedly until the I O configuration menu appears N LEVEL I T un LI p 2 Press the Down key The RS 232C selection display appears LEVEL i a i ee LIL II sr h AIL IE 3 Press Enter or Down to confirm auto RS232 selection 4 Press the Down or UP keys x repeatedly to select the baud rate 230400 lt gt 115200 lt 57600 lt 38400 19200 lt gt 9600 5 Press the Enter key followed by la eal the Exit key The RS 232 setting ENTER is stored and the display goes back to the default display 6 Connect the RS 232C cable to the rear panel terminal RS 232C pin Pin 2 RxD assignment Pin 3 TxD Pin 5 GND Pin 1 4 6 9 No Connection PC GDM null modem connection in which transmit TxD and RS 232C receive RxD lines are cross linked is required Connection 127 GY INSTEK GDM 8261 User Manual GDM PC Pin2 RxD RxD Pin2 Pin3 TxD TxD Pin3 Pin5 GND GND Pind Set the EOL Character Description Configuration 128 The TX TERM
60. al point 2x Ch th t ing th 3 Press the Enter key to confirm editing The compare ENTER measurement starts right away 4 Compare da LILI L measurement ri 1 11 11 ne oppe LLI LI i COMP COMP Indicates Compare mode 2nd display Shows the compare measurement result Pass High or Low 62 GY INSTEK 5 Result Digital I O Deactivate Compare measurement ADVANCED MEASUREMENT High If the 2nd display shows _ High the result is above the High limit Digital I O FAIL Out Pin 6 and HIGH Limit FAIL Out Pin 7 are activated a oes sl Low If the 2nd display shows 1 Low the result is below L LI WN the Low limit Digital I O FAIL Out Pin 6 and LOW Limit FAIL Out Pin 8 are activated Pass If the 2nd display shows I U1 _ 1 Pass the result is staying between the High and the Low limit Digital I O PASS Out Pin 5 is activated The Compare measurement result comes out from the rear panel Digital I O terminal For the terminal details see page 115 To cancel the Compare SHIFT EXIT COMP measurement press the Shift key followed by the Hold Comp key or simply activate another measurement 63 GW INSTEK GDM 8261 User Manual Math Measurement Background Math measurement runs four types of mathematical operations MX B 1 X Percentage and Stats based on the other measurement results Math type MX B Multiplies
61. asurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 CURR DC gt 0 234E 4 Returns the DC current measurement as 0 0234 mA MEASure2 CURRent AC 148 Returns the AC current measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 CURR AC gt 0 387E 2 Returns the AC current measurement GW INSTEK REMOTE CONTROL MEASure2 RESistance Returns the 2W resistance measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 RES gt 1 181372E 6 Returns the 2W measurement MEASure2 FRESistance Returns the 4W resistance measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 FRES gt 1 181372E 6 Returns the 4W measurement MEASure2 FREQuency Returns the frequency measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS2 FREQ gt 0 215029E 5 Returns the frequency 21 5 kHz MEASure2 PERiod Returns the period measurement on the second display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example
62. configuration menu can set the end of line EOL character for remote commands when used with USB and RS232 The GPIB EOL character is fixed as CR LE FOL CR LE CR LF default CR LF 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key the left key gt 2ND repeatedly until the TX TERM configuration menu appears D I Titel I Tv TE TM LEVEL I LA LE TYNT Press the Down key The EOL menu appears Press the Down key The EOL selection menu appears TT LT TL NEEDS CEED Press the Up Down key to select the EOL character FINE TO IC meh i LISLNOSLIT GW INSTEK REMOTE CONTROL 5 Press the Enter key followed by aa gt the Exit key The EOL setting is enter stored and the display goes back to the default display Set the Separation Character Description The TX TERM configuration menu can set the separation character for remote commands Configuration 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key the left key aD repeatedly until the TX TERM configuration menu appears D Titel Ty TE FM LL LL I LA LE TYNT 2 2 he D k d th the Right key The SEP skien 7 display appears LE Ud 7 LI 3 Press the Down key The SEP selection menu appears I O vs AML L N 4 Press the Up Down key to select the separation character pi Ned ued CeO FT i mi rn LIL CR LE LE CR L U 5 Press the En
63. cord and turn On the power Configure GPIB Interface GPIB port 1 Press the Shift key the 2nd SHIFT EXIT MENU configuration Menu key the left key gt 2ND repeatedly until the I O configuration menu appears a D I il of LEVEL I Be Gausa e D 124 GY INSTEK REMOTE CONTROL P he D k d th Sr ker The GPIB erten 7 display appears Note The GPIB menu will be selectable only when the GPIB card is installed I CCI I FOT TEL EEE Press the Down key The GPIB ON OFF selection appears 32255 cmos ren AEE expo smuss FLL LU P he Up D k To continue to the GPIB address configuration press the Enter key The GPIB address configuration menu appears Ist display Shows the GPIB address 2nd display Indicates GPIB address setting Change the address using the Left Right and Up Down keys Range 0 30 Default 15 Press the Enter key followed by er the Exit key The GPIB setting ENTER gt is stored and the display goes back to the default display 125 GW INSTEK GDM 8261 User Manual 8 Connect the GPIB cable to the rear panel optional communication pott after the GPIB card has been installed page 123 GPIB pin Pin Signal Pin Signal assignment 1 Dat
64. ct the highest range Selection list Range Resolution Full scale slow rate 100pA DC only 0 1nA 119 9999 A ImA InA 1 199999mA 10mA 10nA 11 99999mA 100mA O 1uA 119 9999mA TA 1pA 11999995 10A 10uA 10 00000A 31 GY INSTEK GDM 8261 User Manual 2W 4W Resistance Measurement Measurement type 1 Activate resistance measurement 2 2W 4W resistance mode display appears 3 Connect the test lead and measure 32 2 wire Uses the standard V COM ports Recommended for measuring resistances larger than 1kQ 4 wire Compensates the test lead effect using the 4W compensation ports in addition to the standard V COM ports Recommended for measuring sensitive resistances smaller than 1kQ For 2 wire resistance measurement press the 2W 4W key once Por Ai en ge wie 2 4W 2 4W 2W AUTO S PET PT AT LILI VI IE 2W or AW Q Indicates 2W or 4W Resistance mode 6 gt a a I Gee SSS Se AUTO Indicates Automatic range selection 1K 2nd display shows the Resistance range Connect the test lead For 2 wire resistance use the Q V and the COM port For 4 wite resistance use the Q V and the COM pott plus the 4W sense and LO port for sensing The display updates the reading 2W connection AW connection INPUT Q 4W INPUT Heigl SENSE VQ gt GY INSTEK BASIC MEASUREMENT Select Resistance Range Auto range Manual range Selection list
65. d o AET EE EE EO 74 eharaeteretes cecticceae coscacececae eacicincies 189 SE EE 72 measuring characteristics nonnr0nne 189 U Pe eg HM Ca ger MSn aacta eared hee United Kingdom power cord eseeeseeeee 9 Gig AC Kalle oxetsntensasecntenemonvonsaceaoaqunoenscesnoeoanse 183 Temperature characteristics 190 USB configuration wssneconsarandsrnesuwanerceernasnnesids 122 Store measurements cece eeeeessseeeeeeeeeeeeeeeee 91 y l Voltage Table of contents icsscavacsaeetsonssnawessoasenantonsaeninh 3 scanner configuration ssssssssssssssssssssssssssees 98 JE ea arrr aeas nas setae ON 26 Temperature RTD Setting 44 W scanner configuration srrrsrrronrrrnvvrrnrn 98 SENINE EE 40 43 Waveform type voltage comparison 28 195
66. d value Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats CALCulate AVERage PTPeak Returns the recorded peak to peak value max value min value Parameter None lt NR1 gt 0 1 2 0 Store 1 Scan 2 Stats Return Parameter lt NRf gt CALCulate AVERage SDEViation Returns the recorded Standard Deviation Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats 164 GW INSTEK REMOTE CONTROL CALCulate MATH MMFactor Sets the scale factor M for math measurements Para meter lt NRf gt MIN MAX Example CALC MATH MMF MIN Sets the scale factor M to the minimum allowed value CALCulate MATH MMFactor Returns the scale factor M used in the math measurement CALCulate MATH MBFactor Sets the offset factor B for math measurements Para meter lt NRf gt MIN MAX Example CALC MATH MBF MIN Sets the offset factor B to the minimum allowed value CALCulate MATH MBFactor Returns the offset factor B used in the math measurement CALCulate MATH PERCent Sets the Percent value setting for the math function Para meter lt NRf gt MIN MAX Example CALC MATH PERC MAX Sets the percent value to the maximum CALCulate MATH PERCent Returns the Percent value setting for the Math function TRIGger Commands READ Returns 1 and 2 display value The Read query will not return the unit or count number of the reading VALT Returns the 15 display reading in the unit format specified in the Configurati
67. der these tradeoffs when selecting the refresh rate For DC measurements the frequency of the refresh rate depends on the rate settings S M F and the ADC speed settings Accurate Quick page 86 For AC measurements the refresh rate S M F is directly tied to the AC bandwidth settings page 80 For further details please see the specifications 53 GY INSTEK Refresh Rate Readings s Selection steps GDM 8261 User Manual Function S M F Continuity Diode 100 200 300 DCV DCI 100Q 5 60 240 100MQ Accurate DCV DCI 100Q 30 600 2400 100MQ Quick ACV ACI 12 3 38 30 sec reading Frequency Period 1 10 100 1 Press the Shift key followed by SHIFT EXIT RATE refresh rate switches to the next the AUTO RATE key The 2 The refresh rate indicator shows S SM F gt S the current status Reading Indicator Background When no data is captured The reading indicator next to the 1st display flashes according to the refresh rate when the captured data is updated on the display aisit inigi inai OO OUI When there is no captured data the reading indicator flashes once every two seconds slower than the normal refresh rate indicating the DMM is in the waiting mode OIL x Common Attribute Manual Automatic Triggering Automatic triggering default 54 The GDM 8261triggers according to the refresh rate See the previous page for refresh rate setting details GY INSTE
68. dicates an abnormal waveform as seen from the below table Shape L AV Av NMA IN NNM rit T Crest factor 1 0 1 414 1 732 1 414 2 0 1 414 3 0 3 0 4 0 3 0 gt 9 0 29 GW INSTEK GDM 8261 User Manual AC DC Current Measurement Background The GDM 8261 has two input ports for current measurement A LO port for current less than 1 2A anda 10A port for measurements up to 10A The GDM 8261 also features a Current Input Port Auto Detect feature default off For details see page OZ Current type AC O 10A DC O 10A 1 Activate ACI P he ACI AC C k pci the DCI DG Current key or Pit 2 ACI DCI mode 2 display appears M Sit Lit VILT I AC or DC A Indicates AC or DC Current Note AC true RMS Ned EN men A LI AUTO Indicates Automatic range selection 10A 2nd display shows the Current range 3 Connect the Connect the test lead between the 10A and COM pott or test lead and LO and COM port depending on the current Ue nan For current lt 1 2A use the LO port For current up to 10A use the 10A port The display updates the reading 0 1 2A 0 10A 30 GW INSTEK BASIC MEASUREMENT Select Current Range Auto range To turn the automatic range AUTO selection On Off press the AUTO key Manual range Press the Up or the Down key to select the range AUTO indicator turns Off automatically If the appropriate range is unknown sele
69. dicates that the reference REL value is displayed on the 1st display Ist display Shows the reference REL value at full scale To set the reference REL value SHIFT EXIT REL manually press the Shift key followed by the REL key The setting appears GY INSTEK Deactivate Relative measurement ADVANCED MEASUREMENT _ LL magaru Ltt tht t tl REL Indicates Relative measurement Ist display Shows the reference value to full scale 2nd display Indicates Relative value modification 2 Use the Left Right key to move the flashing point cursor and the value 3 Press the Enter key to confirm the value or the Exit key to l ENTER confirm cancel The display switches to SHIFT EXIT measurement cancel To cancel the Relative measurement peL press the REL key again or simply activate another measurement use the Up Down key to change 59 GY INSTEK GDM 8261 User Manual Hold Measurement Applicable to Background 1 Activate Hold measurement 2 Hold measurement display appears 3 Select hold threshold Deactivate Hold measurement 60 aov ocv aci Der zaw Hae TEMP The Hold Measurement function retains the current measurement data and updates it only when it exceeds the set threshold as a percentage of the retained value Press the Hold key AC S HOLD p 7 4 LI t tht tll HOLD I
70. e Right key Use the lett key to go back fel I IL _ v I NO I Lot HL th E i ETT L if M STILT NSTI ESN GW INSTEK STORE RECALL Save Instrument Settings Background The GDM 8261 can save up to 5 instrument settings The settings can save the state function I O and range Upon powering up the current instrument setting is displayed Parameter Save 1 5 Del All Saved e Main display parameters e Settings for each function Parameters 2nd display parameters Continuity threshold Filter settings TCO settings Beep settings e D Shift I O settings e Bandwidth e System Delay Time Gate time e Backlight Light settings RID settings Math settings Input Resistance Auto Zero settings e Input Jack Auto Gain settings I DET e Scanner settings TX TERM Set Instrument 1 Press the Shift key followed by n MENY Setting the 2nd Menu key The anD SYSTEM menu appears ruvl TEM et Sate 2 Press the Down key followed by _ gt the Right key three times The Seve menu appears Ro hand THI KOVvr LLI ELL JUL 3 Press the Down key to enter the Save menu SS ee lt eee Ne LILII PUNTE I 93 GW INSTEK GDM 8261 User Manual Ist display Shows the memory number using the Up Down key or select Del All to delete the save settings in memory 5 Press the Ente
71. e it Tilt stand steps 00000000 00000000 Place the unit horizontally Or in the tilt stand position Place the handle vertically for hand carry 19 GY INSTEK Power Up Steps My ote 20 GDM 8261 User Manual Ensure the correct line voltage is lined up with the arrow on the fuse holder If not see page 179 to set the line voltage and fuse Connect the power cord to the AC Voltage input Make sure the ground connector on the power cord is connected to a safety ground This will affect the measurement accuracy Push to turn on the main power switch on the front panel The display shows the model name and the version for a few seconds Example GDM 8261 V1 00 I LIL Lt Followed by the default measurement settings NEL ALI TTT PUN ULL And the interface I O settings a Pr LIL G G A AL AL GW INSTEK GETTING STARTED 7 Then the default setting appears Example DCV Auto 100mV range DC AUTO S PIP LIL Ul m yo lo eK 21 GW INSTEK GDM 8261 User Manual Basic MEASUREMENT Overview Basic Measurement Overview rrrnnrnvnnnnanvnnnnenvnnen 24 TESE cenras tacorenesecnsaeaeaiessiooeenusrastarcaenetacnsqenet 24 Reading hl senmiecieseexereceunceee caceeancce cee 25 Manual Automatic Triggering rrrrrrnnrrnervnervnrrne
72. e measurement range Parameter Range lt NRf gt MIN MAX Example SENS FRES RANG 1000 Sets the 4W resistance range to 1kQ SENSe FRESistance RANGe Returns the 4W resistance measurement range Parameter None MIN MAX SENSe FREQuency VOLTage RANGe Sets the frequency measurement range Parameter Range lt NRf gt MIN MAX Example SENS FREQ VOLT RANG MIN Sets the frequency to the minimum frequency range SENSe FREQuency VOLTage RANGe Returns the frequency measurement range Parameter None MIN MAX SENSe PERiod VOLTage RANGe Sets the period measurement range Parameter Range lt NRf gt MIN MAX Example SENS PER VOLT RANG MIN Sets the period to the minimum range SENSe JPERiod VOLTage RANGe Returns the period measurement range Return parameter None MIN MAX SENSe VOLTage DC RANGe AUTO Sets the DC voltage Auto range on off Parameter ON OFF Example SENS VOLT DC RANG AUTO ON Turns Auto range on for DC voltage measurements 156 GW INSTEK REMOTE CONTROL SENSe JVOLTage DC RANGe AUTO Returns the DC voltage Auto range settings Return parameter 0 1 0 OFF 1 ON SENSe VOLTage AC RANGe AUTO Sets the AC voltage Auto range on off Parameter ON OFF Example SENS VOLT AC RANG AUTO ON Turns Auto range on for AC voltage measurements SENSe JVOLTage AC RANGe AUTO Returns the AC voltage Auto range settings Return parameter 0 1 0 OFF 1 ON SENSe JCURRent DC RANGe AUTO
73. e recall measurement history is not applicable to the Diode Continuity tests Store step 1 Press the Shift key followed by SHIFT EXIT STORE the DCI Store key The store gt per menu appears Z l I DET iE OINEI ILI 2 M h ing th nica e dan count using the Up Down key 3 Press the Enter key to confirm editing and to go back to the I mm EEE previous display pi uD On NMUENOC THE IO Lect tt so STO Indicates the measurement history is stored 91 GY INSTEK GDM 8261 User Manual Recall Measurement Record Background Not applicable to Recall stored record The GDM 8261 can recall previously recorded measurement results for observation and analysis The Standard Deviation Maximum Value Minimum Value and Average Value can also be viewed Store recall measurement history is not applicable to the Diode Continuity tests gt Press the Shift key then the ACI SHIFT EXIT RECALL Recall key The stored gt measurement record appears d o BD ee tlt fa Ist display Shows the stored measurement result mannar J pg l gt gt ren 2nd display Shows the reading count RCL Indicates the data has been recalled View each reading View Max Min Average 92 Ch h di ino th url i ing count using the Switch to the Standard Deviation Average Maximum Minimum value of the recorded data using th
74. eS the current status Reading Indicator Background When no data is captured The reading indicator next to the 1st display flashes according to the refresh rate setting inonnig OOOO IH When there is no captured data the reading indicator flashes once every two seconds slower than the normal refresh rate indicating the DMM is in standby mode pi OL x 25 GW INSTEK GDM 8261 User Manual Manual Automatic Triggering Automatic The GDM 8261 triggers according to the refresh rate triggering See the previous page for refresh rate setting details default Manual Press the Trig key to trigger triggering measurement manually The trigger must be set to external EXT for manual triggering See page 72 AC DC Voltage Measurement Voltage type AC 0 750V DC 0 1000V 1 Activate ACV Press the ACV AC Voltage key or acy DEV DCV DCV DC Voltage key Car 2 ACV DCV i _ ree mode display HO IHHT FLL appears LILI EENE DE DE H V ACor DC V Indicates AC DC voltage AUTO Indicates Automatic range selection 100mV 2nd display shows the Voltage range 3 Connect the Connect the test lead between the V NET test lead and and the COM port The display measure updates the reading 26 GY INSTEK BASIC MEASUREMENT Select Voltage Range Auto range Manual range Selection list Note To turn the automatic range selection auto On Off press the AUTO key Press the Up or the Down key to selec
75. each display For example ACV and 2W 4W resistance measurements Combination Applications DCV ACV e Measure DC signals that have AC components For example Measure the DC offset and AC noise from an amplifier output Measure the DC output voltage and ripple from a DC power supply Ripple or the AC noise frequency must be within the DMM s measurable AC bandwidth for the noise to be measured GY INSTEK DUAL MEASUREMENT AC Noise L Amplifier Output DC Power Supply Output INPUT V AC ripple 7 DC output DCV DCI e Monitor the voltage and current present on a component in a circuit or the output voltage and current of a DC power supply Monitor Voltage and Current Supply 47 GW INSTEK GDM 8261 User Manual ACV Hz e Measure the frequency response of devices such as amplifiers or buffers The frequencies of the amplifier output must be within the DMM s measurable AC bandwidth for the amplitude at a spot frequency to be measured accurately Frequency Response INPUT The following table shows the available measurement combinations Ist Display 2nd Display ACV DCV ACI DCI Hz P 2W AW ACV 7 DCV KD AC 9 6 9 9 _ DCI e 6 2W AN Hz P e Note e 2w 4W measurements in combination with other measurements are possible but may not be practical as the measurement accuracy is not guaranteed e Wh
76. ed Buffer A D Driver ADC Input Hi offset offset offset Terminal o Buffer Input Lo o gl kap Terminal Mode Rate Accuracy Speed Quick Speed Total offset DCV S v v AW 2W v TC RTD v No Speed setting 1 Press the Shift key followed by MEN the 2nd Menu key Press the right key twice The ADC setting menu appears B kac TRIG A TT LEVE Gr er CCT ot LEVEL HL JE TT 2 Press the Down key twice The A Zero setting appears oS 1 7 FL ia LIN 3 Sed h I l h 4 Press the Enter key to confirm auro LO your selection Press the Exit ar key to go back to the default display omme I i mme _ GY INSTEK Auto Gain Background Applicable Measurement Mode Rate and Speed settings Panel operation SYSTEM DISPLAY CONFIGURATION The Auto Gain A GAIN setting performs auto gain correction of the internal amplifiers Setting Off On default On Mode Rate Accuracy Speed Quick Speed DCV S v v DCI 7 F F v TC v No Speed setting EXIT MENU 1 Press the Shift key followed by the 2nd Menu key Press the right key twice to choose the SET ADC menu B kc TRIG See See I Evel i CT OTe CCT om LEVET L JLI TI 2 Press the Down key and then the Lett key to choose A GAIN Press the Down key The A GAIN setting ap
77. eesseeeaeens 157 SENSe VOLTage AC RANGe AUTO erronnnronnnnrrrnnnnnvvrnnnvrrnnnnervennnnnrnnnssenn 157 SENSe VOLTage AC RANGe AUT OP ou cecceesseesseeeecsteesseeeeseesseeeteeeetens 157 SENSe CURRent DC RANGe AUTO nneronnonnoereenvvnnevsennvennevsennvnnnevennenne 157 SENSe JCURRent DC RANGe AUTO uusnrsnerenereneseneennrennsensssnevenesenssnnsenee 157 SENSE JCURRENEAC RANGE AUTO cvsesiiscastcusinssssencenanesasnes seausaviesesnngonss 157 SENSe JCURRent AC RANGe AUTO senesenrenvrenvesneeenesenssnnsennsennsensennsenee 157 SENSe RESistance RANGe AUTO rnnnnesennnnrrnnnnnrvernnnnrnnnnnesernnnrrnnnnsesene 157 SENSe JRESistance RANGe AUTO ce eecccsseeseeeeceeeeseeeeseeneeeeaeenseens 157 SENSe JFRESIstance RANGe AUTO nnerernnnnrrnnnnnvernnnnnrrnnnnerennnrnnnnnevenne 158 SENSe JFRESIstance RANGe AUTO u umresenveonvrenvrsrveenersnvssenseenssnssennsens 158 SENSe FREQuency VOLTage RANGe AUTO rnnnnonrnnnnvrvnnnnevvrnnnnrrnnnesenn 158 SENSe FREQuency VOLTage RANGe AUTO ii nnnnnrvrenvrervrenvernrvrennrennennn 158 SENSe JPERiod VOLTage RANGe AUTO snnnnrevrnrrvrrrrvrnrrrerrenerrevsrrresnsen 158 SENSe JPERiod VOLTage RANGe AUTO 1 unnannrenvvrnrrrervrrnverrrrrensrensrennennn 158 SENSe JVOLTage DC RESOlution seresnsesnnresnnresnnresnnsesnnsesnnsesnnsesnvsssnnee 158 SENSe VOLTage DC RESOIUtION rmmnnrrenerervrervrrnvrrrrrrerrrenrersrrrensernnennn 158 SENSe JVOLTage AC RESolution resnnresnvrennresnn
78. eft gt key 71 GY INSTEK GDM 8261 User Manual number is shown on the display LET Che OT LILI LILI Lt JIN Ftd Ist display Shows 2 characters AA ZZ 2nd display Shows 6 numbers 000000 99999 3 Press the Enter key or the Exit SHIFT EXIT key to go back to the previous display ENTER Trigger Setting Manual Automatic Triggering Automatic triggering default Manual triggering The GDM 8261 triggers according to the refresh rate See the previous page for refresh rate setting details Press the Trig key to trigger measurement manually See below for details Use External Trigger Background Signal connection 72 The GDM 8261 uses the internal trigger by default for example to count the frequency and the period Using an external trigger allows customized triggering conditions Connect the external trigger signal to the Digital I O port located on the rear panel GW INSTEK SYSTEM DISPLAY CONFIGURATION DB 9 female DIGITAL I O O O Digital I O pin High Limit FAIL Out LOW Limit FAIL Out assignment FAIL Out EOM Out 6789 VCC ou IE PASS Out External Trigger In Digital chassis Ground 1 Activate Press the Shift key followed by the SHIFT EXIT INT EXT external trigger Trig Int Ext key The EXT gt indicator appears on the display LIL TETT TET LEN TLL EXT 2 Start trigger Press the Trig key to start triggering manually
79. en two separate measurements are taken there is a switching delay between the first measurement and the second measurement Ist Measurement Choose a basic measurement from Page 22 item setting the above table Example press the ACI key Example 48 GY INSTEK 2nd Measurement item setting Editing lst or 2nd measurement item settings 1 Select active display 2 Edit active display settings Turn Off 2nd Measurement DUAL MEASUREMENT Press the 2nd key then the target item example ACV The display updates the measurement result example ACI ACV CI gg Cid a 00364 nowuonor bese LI LI LI Ll l 2ND Ist Display Shows the primary measurement result 2nd Display Shows the secondary measurement result 7 Indicates that dual measurement is active After the secondary measurement function has been activated the rate range and measurement item can be edited for either the primary or secondary display Note however it is more practical to configure the first or second measurement items before activating dual measurement mode Toggle whether the primary or 2ND secondary display is the active display by pressing the 2ND key toggle active display Primary display 2ND zs not visible on the display Secondary display 2ND zs visible on the display Do not hold the 2ND key This will turn the dual measurement off Edit the range rate or measurement Page 22 item for the active di
80. eps when the test result is pass Fail Beeps when the test result is fail Off Beep function is turned Off 1 Press the Shift key followed by SHIFT EXIT MENU the 2nd Menu key The system 2ND menu appears Evel ft FuC TM LEVEL I AJI JILI 2 Press the Down key The beep menu appears L omme 1 TEE ULLI 3 Press the Down key The beep setting appears LETE HOARF LL LLL AE EN IL Wig chanbe the setae h 7 nange ai press the Beeper type Pass beep when pass Fail beep when fail default Off beep off Press the Enter key to confirm SHIFT EXIT Press the Exit key to go back to the ENTER default display 37 GY INSTEK GDM 8261 User Manual Frequency Period Measurement 1 Activate frequency period measurement 2 Frequency Period mode display appears 3 Connect the test lead and measure 38 To measure Frequency press the Hz P key once To measure the Period press the Hz P key twice ai ERER rhe foto t bt fv gt a Ll IL t Lt ty Hz S Indicates Frequency period measurement AUTO Indicates Automatic range selection FREQ 2nd display shows the measurement mode PERIOD Connect the test lead between the V and the COM port The display updates the reading INPUT V Q gt GW INSTEK BASIC MEASUREMENT Select Frequency Period Voltage Range Frequency Period To select between period frequency mode
81. ets the AC Current measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS CURR AC RES 0 0001 Sets the AC Current resolution to 0 0001 SENSe CURRent AC RESolution Returns the AC Current resolution Parameter None MIN MAX SENSe RESistance RESolution Sets the 2W Resistance measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS RES RES 0 01 Sets the 2W Resistance resolution to 0 01 SENSe RESistance RESolution Returns the 2W Resistance resolution Parameter None MIN MAX SENSe FRESistance RESolution Sets the 4W Resistance measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS FRES RES 0 01 Sets the 4W Resistance resolution to 0 01 SENSe FRESistance RESolution Returns the 4W Resistance resolution Parameter None MIN MAX 159 GW INSTEK GDM 8261 User Manual SENSe JCONTinuity RESolution Sets the Continuity measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS CONT RES 0 001 Sets the Continuity resolution to 0 001 SENSe JCONTinuity RESolution Returns the Continuity measurement resolution Parameter None MIN MAX SENSe JDIODe RESolution Sets the
82. ey followed by auro SHIFT EXIT the Exit key The setting is S stored and the display goes back to the normal mode Setup Advanced Scan Panel operation 1 Zz J Press the Shift key the 2nd key SHIFT EXIT MENU ENU the Left key The S wos LEVEN I Era anda Press the Down key followed by ae the Right key The Advanced Scan menu appears LEVELE FE TLL F I TV Pitty FUN Press the Down key The Starting Minimum channel setting appears MIN LA Pusch NT k iE LIUN ILI I 107 GY INSTEK 108 GDM 8261 User Manual M h he ch l ug he Lele Rigar kad change the value using the Up Down key Range 101 118 When finished press the Enter key The End Maximum ENTER channel setting appears MEET E LITEA LH x Ll I LILIM I LIUN t I Move the cursor to the org using the Left Right key change the value using he Up Down key Range 101 118 must be greater than or equal to the Start Min channel When finished press the Enter key The Timer setting appears ae Move the cursor to the timer HOLD TRIG setting using the Left Right key and change the value using he Up Down key Range Ims 9999ms When finished press the Enter key The Count setting appears aaa Bene IL LET FIN I DET TT Ud LIV bl VET Range 1 999 GY INSTEK 10 SCANNER OPTIONAL Move the cursor to the count number
83. he range of the current function on the second display Return parameter DCV 0 1 100mV 1 1V 10 10V 100 100V 1000 1000V ACV 0 1 100mV 1 1V 10 10V 100 100V 750 750V ACI 0 001 1mA 0 01 10mA 0 1 100mA 1 1A 10 10A DCI 0 001 1mA 0 01 10mA 0 1 100mA 1 1A 10 10A RES 10E 1 1009 10E 2 1kQ2 10E 3 10kQ 10E 4 100k 2 10E 5 1MQ 10E 6 10MQ 10E 7 100MQ CONFigure2 AUTO Sets Auto Range on or off on the 2nd display Parameter ON OFF Example CONF2 AUTO ON CONFigure2 AUTO Returns the Auto Range status of the function on the 2nd display Return Parameter 0 1 1 Auto range 0 Manual range 145 GY INSTEK Measure Commands MEASure VOLTage DC Returns the DC voltage measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS VOLT DC gt 0 488E 4 Returns the DC voltage measurement as 0 0488 mV MEASure VOLTage AC Returns the AC voltage measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS VOLT AC gt 0 511E 3 Returns the AC voltage measurement as 0 511 mV MEASure CURRent DC Returns the DC current measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS CURR DC gt 0 234E 4 Returns the DC cur
84. he terminals and banana plugs to reach an equilibrium temperature AC Characteristics I True RMS AC Voltage 4 Rangel 100 0000 mV 1 000000 V to 750 000 V Frequency 3Hz 5Hz 5Hz 10Hz 10Hz 20kHz 20kHz 50kHz 50kHz 100kHz 100kHz 300kHz l 3Hz 5Hz 5Hz 10Hz 10Hz 20kHz 20kHz 50kHz 50kHz 100kHz PI 100kHz 300kHz l 24 Hour 23 C 1C 1 00 0 03 0 35 0 03 0 04 0 03 0 10 0 05 0 55 0 08 4 00 0 50 1 00 0 02 0 35 0 02 0 04 0 02 0 10 0 04 0 55 0 08 4 00 0 50 90 Day 23 C45 1 00 0 04 0 35 0 04 0 05 0 04 0 11 0 05 0 60 0 08 4 00 0 50 1 00 0 03 0 35 0 03 0 05 0 03 0 11 0 05 0 60 0 08 4 00 0 50 Accuracy Specifications of reading of range True RMS AC Current Rangel 1 000000 mA 186 Frequency 3Hz 5Hz 5Hz 10Hz 10Hz 5kHz 5kHz 10kHz 24 Hour VI 23 C41 C 1 00 0 04 0 30 0 04 0 10 0 04 0 2 0 25 90 Day 23 C 5 C 1 00 0 04 0 30 0 04 0 10 0 04 0 2 0 25 1 Year 23 C 5 C 1 00 0 04 0 35 0 04 0 06 0 04 0 12 0 05 0 60 0 08 4 00 0 50 1 00 0 03 0 35 0 03 0 06 0 03 0 12 0 05 0 60 0 08 4 00 0 50 1 Year 23 C 5C 1 0 0 04 0 3 0 04 0 1 0 04 0 2 0 25 Temperature Coefficient C PI 0 100 0 004 0 035 0 004 0 005 0 004 0 011 0 005 0 060 0 008 0 20 0 02 0 100 0 003 0 035 0 003 0 005 0 003
85. ied for sinewave input only 8 Additional settling delay required when input dc level varies 9 0 C 18 C 28 C 55C 188 GW INSTEK APPENDIX Frequency and Period Characteristics Frequency Period P 24 Hour 90 Day 1 Year Temperature Range Frequency 23 C 1 C 23 C 5 C 23 C 5 C _ Coefficient C PI 100 mV 3Hz 5Hz 0 1 0 1 0 1 0 005 to ove SHz 10Hz 0 05 0 05 0 05 0 005 10Hz 40Hz 0 03 0 03 0 03 0 001 40Hz 300kHz 0 006 0 01 0 01 0 001 Accuracy Specifications of reading Measuring Characteristics Frequency and Period Settling Considerations Measurement Considerations Reciprocal counting technique AC coupled input using the ac voltage measurement function Voltage Ranges 100 mV rms full scale to 750 V rms Auto or manual ranging Measurement Method Errors will occur when attempting to measure the frequency or period of an input following a dc offset voltage change The input blocking RC time constant must be allowed to fully settle up to 1 sec before the most accurate measurements are possible All frequency counters are susceptible to error when measuring low voltage low frequency signals Shielding inputs from external noise pickup is critical for minimizing measurement errors Operating Characteristics Function Digits Readings s Frequency 67 1 Period 57 10 4h 100 1 Relative to calibration standards 2 20 overrange on all ranges except 750 Vac 3 Input gt
86. iod Measurement rrrnnnrnnernnern 38 Temperature Measurement rrnnnnnnnnnnnnnnnnnvnnnver 40 DUAL MEASUREMENT aars 46 Dual Measurement cccccceccecceeceeeceeeeeeneeeeees 46 ADVANCED MEASUREMENT ccececcscecsceceececscees 52 Advanced Measurement Overview c0008 53 dBm dB Measurement ccccccssccseeceeeeeeees 55 Max Min Measurement rnannnnnnnnnnvnnnnnnanennnnner 57 Relative Value Measurement rnrrrnnornnrnnernnrn 58 Hold Measurement ccceeceecseeceeeeeseeeeseens 60 Compare Measurement nnnanananennnnenenennenenenene 6 Math Measurement rrrarnarnnnnnnrnnrnnannernnrnnrnnen 64 SYSTEM DISPLAY CONFIGURATION eee eee 70 Refresh Rate Setting cccsssscsessccsescensescenees 71 GW INSTEK GDM 8261 User Manual View Serial Number rnarnnernnnrnannnernnnrnannnnnnere 71 VE o N eee 72 Digital Filter Setting crn ccenacccerceqaseeesacceereeemenceaua 75 DENN Ser 77 Measurement Configuration Settings 78 ADC SAN cet sees eros ce tees ogee teste 83 Frequency Period Settings rrrrnnrrnnrrnnrrnnernnr 87 STORE FELL enn 90 Store Measurement Record rrrrnnurnnnrrnnvrrnvern 91 Recall Measurement Record rarnnarnnernnernnernnn 92 Save Instrument Settings eere 93 Recall Instrument Settings rrrrnnornnnrrnnvrnnnrnnnr 94 SCANNER OPTIONAL reg 96 GDM SC1 Scanner Specifications rrarnnrrnnnrr 97 Scanner Installation
87. ion Parameter lt NRf gt MIN MAX Example CALC DB REF MAX Sets the reference value for dB measurements to the maximum allowed CALCulate DB REFerence Returns the reference value from the dB function 163 GW INSTEK GDM 8261 User Manual CALCulate DBM REFerence Sets the reference value for the dBm function Parameter lt NRf gt MIN MAX Example CALC DBM REF MAX Sets the reference value for dBm measurements to the maximum allowed CALCulate DBM REFerence Returns the reference value from the dBm function CALCulate STORe COUNt Set the number of measurement counts that are recorded with the Store measurement function Parameter lt NR1 gt 2 9999 MIN MAX Example CALC STOR COUN 1000 Sets the number of counts to be recorded as 1000 CALCulate STORe COUNt Returns the number of counts that are recorded with the Store measurement function Parameter None MIN MAX CALCulate AVERage COUNt Returns the total number of recorded counts Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats Example CALC AVER COUN 0 gt 0010 Returns the total number of counts set for the Store function 10 counts CALCulate AVERage MINimum Returns the minimum recorded value Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats CALCulate AVERage MAXimum Returns the maximum recorded value Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats CALCulate AVERage AVERage Returns the average recorde
88. k to SHIFT EXIT SCAN the normal display press the Shift key followed by the ACV key Scan ot DCV key Step again SHIFT EXIT STEP O ar 111 GY INSTEK GDM 8261 User Manual Recall Scan Step Result Panel operation ie After the Scan Step is SHIFT EXIT RECALL completed the data is stored gt internally Press the Shift key followed by the ACI Recall key The first channel appears example channel 101 DC I ILITI tt Lit d tJ To view the Standard TRIG Deviation Min Max Average data press the Left and Right a Te e _ _ gt m lt nn m V fA pp F Setup and Run Monitoring Panel operation 112 1 keys Mi NE ME LI I TT TL Nel Tretti Oe IL HE TN To move to the next channel press the Up Down key Press the Exit key to get out SHIFT EXIT from recall mode Press the Shift key the 2nd SHIFT EXIT MENU Menu key the Left key The Scan menu appears Press the Down key followed 2i the Left key twice The Monitor Scan setting menu appears 15 HOLD HOLD GY INSTEK gt 5 SCANNER OPTIONAL Press the Down key The channel selection appears MONI TI MEN l E IIN VE OT Move the cursor to the channel guoip using the Left Right key and change the channel number using the Up Down keys ENTER Fn q EEE LITA TRIG
89. loured Green amp Yellow must be connected to the Earth terminal marked with either the letter E the earth symbol or coloured Green Green amp Yellow The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the rating information on the equipment and or user instructions for details As a guide a cable of 0 75mm should be protected by a 3A or 5A fuse Larger conductors would normally require 13A types depending on the connection method used Any exposed wiring from a cable plug or connection that is engaged in a live socket is extremely hazardous If a cable or plug is deemed hazardous turn off the mains power and remove the cable any fuses and fuse assemblies All hazardous wiring must be immediately destroyed and replaced in accordance to the above standard GY INSTEK GDM 8261 User Manual G ETTING STARTED This chapter describes the GDM 8261 in a nutshell including an Overview of its main features and front rear panel introduction After going through the Overview follow the Power up sequence to properly setup the GDM 82061 Please
90. lowed by the Right key The MEAS menu appears WAL TIL FIL NTG Press the down key followed by v the left key twice The AC Bandwidth menu appears LIT LIN bandwidth setting appears ERE ge mem aw P gt esac SSS gt J7 AMIL Ist display Shows the bandwidth setting Select the setting using the a v Up Down keys Press the Enter key to confirm SHIFT EXIT your selection Press the Exit gt ENTER key to go back to the default display 81 GW INSTEK GDM 8261 User Manual Current Input Port Auto Detect Setting Background The Current Input Port Auto Detect setting will allow the DMM to detect whether current is applied to the 1A ot 10A input ports and enables it to set the correct range when Auto range is on The Current detect feature works by activating the input port only when a certain Detect Threshold is reached and deactivating the input port when the input current dips below a certain Reset Threshold Input current Detect threshold Reset Deactivate threshold port DET On Off default Off Panel operation 1 Press the Shift key followed by SHIFT EXIT MENU the 2nd Menu key The system aD menu appears I Iil of KE TPM LL LL I I II Lil key he left key Th down key Press the left key T gt wo Current detect menu appears I Titel d VT LE ELE 82 GY INSTEK
91. meter lt NR3 gt 0 9999 MIN MAX Example ROUT DEL 100 Sets the delay time to 100 milliseconds ROUTe DELay Returns the Delay timer settings Parameter None MIN MAX ROUTe STATe Queries whether the scanner box is installed or not Return parameter Boolean 0 1 O not installed 1 installed 173 GW INSTEK GDM 8261 User Manual ROUTe ADVance Turns the scanner Advanced mode on off Parameter ON OFF Example ROUT ADV OFF Turns advanced scanner mode off ROUTe ADVance Returns the advanced mode status on off Return parameter ON OFF ROUTe SCAN COUNt Returns the current scan count number Return parameter lt NR1 gt 1 999 ROUTe SCAN FINal Configures the DMM to send a Scan OK message at the completion of the scan Parameter ON OFF Example ROUT SCAN FIN ON Scan Ok will be sent at the completion of the scan ROUTe SCAN FINal Returns the status of the OUTe SCAN FINal command ROUTe SCAN BOX Sets type of scanner box voltage current Parameter Volt Curr Example ROUT SCAN BOX VOLT Sets the scanner box type to voltage ROUTe SCAN BOX Returns the configured scanner box type Return parameter VOLT CURR INPut IMPedance AUTO Sets the Automatic input impedance for DCV mode Parameter ON OFF Example INP IMP AUTO ON Turns the Automatic input impedance on INPut IMPedance AUTO Returns the Automatic input impedance mode Return parameter ON OFF INI Tiate Set the trigger sy
92. meter 0 1 1 Auto range 0 Manual range Secondary Display CONFigure2 Commands CON Figure2 VOLTage DC Sets measurement to DC Voltage on the second display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 VOLT DC 1 MAX Sets the voltage range to 1 volt and the resolution to the maximum 143 GW INSTEK GDM 8261 User Manual CONFigure2 VOLTage AC Sets measurement to AC Voltage on the second display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 VOLT AC Sets the measurement mode to AC voltage CONFigure2 CURRent DC Sets measurement to DC Current on the second display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 CURR DC 10e 3 DEF Sets the DC current to 10mA using the default resolution on the second display CONFigure2 CURRent AC Sets measurement to AC Current on the second display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF2 CURR AC 10e 2 MAX Sets the measurement mode to ACI with a 100mA range at the maximum resolution CON Figure2 RESistance Sets measurement to 2W Resistance on the second display and specifies
93. nced function on off Parameter ON OFF Example CALC STAT OFF Turns the Advanced function off CALCulate STATe Returns the status of the Advanced function Return Parameter 0 1 I ON 0 OFF CALCulate MINimun Returns the minimum value from the Max Min measurement CALCulate MAXimun Returns the maximum value from the Max Min measurement 162 GW INSTEK REMOTE CONTROL CALCulate HOLD REFerence Sets the percentage threshold for the Hold function Parameter lt NRf gt 0 01 0 1 1 10 Example CALC HOLD REF 10 Sets the hold percentage to 10 CALCulate HOLD REFerence Returns the percentage threshold from the Hold function CALCulate REL REFerence Sets the reference value for the relative function Parameter lt NRf gt MIN MAX Example CALC REL REF MAX Sets the reference value to the maximum allowed CALCulate REL REFerence Returns the reference value from the relative function CALCulate LIMit LOWer Sets the lower limit of the compare function Para meter lt NRf gt MIN MAX Example CALC LIM LOW 1 0 Sets the lower limit to 1 0 CALCulate LIMit LOWer Returns the lower limit of the compare function CALCulate LIMit UPPer Sets the upper limit of the compare function Para meter lt NRf gt MIN MAX Example CALC LIM UPP 1 0 Sets the upper limit to 1 0 CALCulate LIMit UPPer Returns the upper limit of the compare function CALCulate DB REFerence Sets the reference value for the dB funct
94. ndicates Hold measurement 2nd display Shows the Hold threshold TI f l Ist display Shows the measurement data Select the hold threshold using the Up Down key The 2nd display changes accordingly Range 0 01 0 1 1 10 To cancel the Hold measurement press the Hold key for 2 seconds or simply activate another measurement GY INSTEK ADVANCED MEASUREMENT Compare Measurement Applicable to Background 1 Activate Compare measurement 2 High limit setting aov ocv aci Der zaw Hae TEMP Compare measurement checks and updates if the measurement data stays between the upper high and lower low limit specified Press the Shift key then the Hold SHIFT EXIT COMP Comp key imanam gt LLL LIL Ist display Shows the high limit value I mm eam ee Gamer Lo q 2nd display Indicates high limit setting 1 Use the Left Right key to move the cursor flashing point between high low setting digits and decimal point 2 Change the parameter using the Up Down key 3 Press the Enter key to confirm editing and move to the low he ENTER limit setting 61 GW INSTEK GDM 8261 User Manual 3 Low limit I TT I setting Inooooo 8 LULU Ist display Shows the low limit value 2nd display Indicates low limit setting 1 Use the Left Right key to move the cursor flashing point between high low setting digits and decim
95. nge setting Return parameter 0 1 0 OFF 1 ON SENSe JPERiod VOLTage RANGe AUTO Sets the Period Auto range settings on off Parameter ON OFF Example SENS PER VOLT RANG AUTO OFF Turns the Auto range setting off for period measurements SENSe JPERiod VOLTage RANGe AUTO Returns the Period Auto range setting Return parameter 0 1 0 OFF 1 ON SENSe VOLTage DC RESolution Sets the DC Voltage measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS VOLT DC RES MAX Sets the DC Voltage resolution to MAX SENSe VOLTage DC RESolution Returns the DC Voltage resolution Parameter None MIN MAX SENSe VOLTage AC RESolution Sets the AC Voltage measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS VOLT AC RES MAX Sets the AC Voltage resolution to MAX 158 GW INSTEK REMOTE CONTROL SENSe VOLTage AC RESolution Returns the AC Voltage resolution Parameter None MIN MAX SENSe CURRent DC RESolution Sets the DC Current measurement resolution The resolution depends on the rate and range settings Parameter Resolution lt NRf gt MIN MAX Example SENS CURR DC RES 0 01 Sets the DC Current resolution to 0 01 SENSe CURRent DC RESolution Returns the DC Current resolution Parameter None MIN MAX SENSe CURRent AC RESolution S
96. note the information in this manual was correct at the time of printing However as GW Instek continues to improve its products changes can occur at any time without notice Please see the GW Instek website for the latest information and content Characteristics GDM 8261 Characteristics cccccccecceeccecseeecees 11 Panel Overview Front Panel Overview ccccccecceccccccecceccecceesees 12 Measurement Keys upper row srnonenennnnnnvnvnnnnr 13 Measurement Keys lower row rrrrernnernnrrnnrnnernnn 15 Rear Panel Overview cccccecceccceccecceeccecceecueessess 17 Setup TUSTIN PEER EE 19 PT 20 10 GW INSTEK GETTING STARTED GDM 8261 Characteristics The GDM 8261 is a portable dual display digital multimeter suitable for a wide range of applications such as production testing research and field verification Performance High DCV accuracy 0 0035 High current range 10A High Voltage range 1000V High ACV frequency response 300kHz Features 6 digits Multi functions ACV DCV ACI DCI 2W 4W R Hz Temp Continuity Diode test MAX MIN REL dBm Hold AutoHold Compare Statistics Manual or Auto ranging AC true RMS Interface Voltage Resistance Diode Temperature input Current input 4W sense input USB device RS232 GPIB optional LAN optional for remote control 9 pin digital I O 16 channel scanner optional Optional Items 16 channel scanner GPIB pott Ethernet po
97. nssensssnnsenssens 150 SENSe TEMPerature RTD ALPHAa saa sniarsetnniesenans 150 SENSe TEMPerature RT D ALPHab ccsccsssscesscessessescesscsseesensceseesenens 150 SENSe TEMPerature RTD BETA rennrnnnnnrornnnnnrnnnvvnnnnnnrnnnnevernnnnnrnnnnesenee 150 SENSe TEMPerature RT D BETAD ccsccssscssscesscsssssesscessestesenscessesenens 150 SENSE TEM Perature RT DID ELV a svicsccstvtsscuss ccactietonsussansvoesietaaovssnasbeasieaase 150 SENSe TEMPerature RTD DELTa ccceecccsssceseeeteceseeeseeeeseeneesseeensens 150 ISENSe TEN Perature PRED YP Evsssnstessesoiteniineincactdnvaricuenbedeenitnainsiass 151 SENSe TEMPerature FRTD TYPED ccsccsssssesscsssessessesecseeserscessesseees 151 SENSe TEMPerature FRTD ALPHAa xiccetvatiaactecsorenieninascuvos iecetawtsacusnetaneais 151 134 GW INSTEK REMOTE CONTROL SENSe TEMPerature FRTD ALPHae cecccscssseesteceeeeseeeseeenseenseeesnes 151 SENSe TEM Perature FRT Di BETA uvaner nedaememndjadsheke 151 SENSe TEMPerature FRTD BETAS hi nnrennrenrroorvrenvrsnvvsnnsrenvrsnnvsenssenvssensee 151 SENSE TEMPEL FRI DID EU a Lem 151 SENSe TEMPerature FRTD DELTa nennnrnrnrorrvrnrrrrrrenvrrnrvrrrrrensrensernnen 151 BENENE 151 SENSE IDE Tector RATE Teea en e E E 151 SENSe JAVERage TCONtrol uo eecccesceesseceeeeeeeceseeeeseeceeeeeeeeeeeeeeeeeeens 152 SENSe JAVERage TCONtrol csccssssserscesscsssesessceseesseesenscsseessnssenseees 152 SENS MERE C
98. nt dB is defined as dBm dBmref When the dB measurement is activated the GDM 8261 calculates the dBm using the reading at the first moment and stores it as dBmref Activate dB Press the Shift key followed by the SHIFT EXT dB Hz P key The 1st display shows dB gt and the 2nd display shows the current Voltage reading dB result appears dBmref Deactivate dB measurement a 006 1 LE tl TI tod oO LI LI dB dB Indicates dB measurement 00 617mV Indicates the present Voltage reading Press the 2nd key to see the dBm OND ref value To cancel the dB measurement SEN de press the Shift key followed by the gt Hz P key or simply activate another measurement 56 GY INSTEK ADVANCED MEASUREMENT Max Min Measurement Applicable to Background acv ocv aci ner zaw ke TEMP Maximum and Minimum measurement stores the highest maximum or lowest minimum reading and shows it on the 1 display when the 2nd key is pressed 1 Activate Max Min 2 Max Min result is activated View Max Min value Max Min measurement appears Deactivate Max Min measurement For Max measurement press the MX MN key once MXN MXIMN AC AUTO S MAX mia Da Du Du et PULL Ib tl For Min measurement press the MX MN key twice MIN MAX Indicates Min Max measurement is activated IV 2nd di
99. of 12 Monitor Selects just one channel and continuously measures It Setup Simple Scan Panel operation Ensure the scanner has been installed before trying to configure the scanner page 97 1 Press the Shift key the 2nd key SHIFT EXIT MENU ENU the Left key The S 203 LEVEN I FET LL LL I 2 Press the Down key The Simple Scan menu appears Cr MEN J LL LLL JIII Le 3 Press the Down key again The Starting Minimum channel setting appears I LICIA I LIUN I mi FEIN LT LI 105 GY INSTEK 106 GDM 8261 User Manual M h he ch l ug he Lele Rigar kad change the value using the Up Down key Range 101 118 When finished press the Enter key The End Maximum ENTER channel setting appears HELE oF Er te FE 6 Meee EP LIOUN t to Move the cursor to the ar using the Left Right key change the value using he Up Down key Range 101 118 must be equal to or greater than the Start Min channel When finished press the Enter key The Timer setting appears Move the cursor to the time setting using the Left Right key and change the value using de Up Down key Range Ims 9999ms Press the Enter key The loop step Count setting appears GY INSTEK w SCANNER OPTIONAL 10 Move the cursor to the count 11 number using the Left Right key and change the value using a the Up Down key Range L 999 Press the Enter k
100. oltage measurement range Parameter lt NRf gt MIN MAX Example SENS VOLT DC RANG MIN Set the DC voltage range to lowest range allowed SENSe JVOLTage DC RANGe Returns the DC Voltage measurement range Parameter None MIN MAX SENSe VOLTage AC RANGe Sets the AC Voltage measurement range Parameter lt NRf gt MIN MAX Example SENS VOLT AC RANG MIN Set the AC voltage range to lowest range allowed SENSe JVOLTage AC RANGe Returns the AC Voltage measurement range Parameter None MIN MAX SENSe JCURRent DC RANGe Sets the DC Current measurement range Parameter Range lt NRf gt MIN MAX Example SENS CURR DC RANG 10 e 2 Sets the DC current range to 100mA SENSe JCURRent DC RANGe Returns the DC Current measurement range Parameter None MIN MAX SENSe JCURRent AC RANGe Sets the AC Current measurement range Parameter Range lt NRf gt MIN MAX Example SENS CURR AC RANG 10 e 2 Sets the AC current range to 100mA SENSe JCURRent AC RANGe Returns the AC Current measurement range Parameter None MIN MAX 155 GW INSTEK GDM 8261 User Manual SENSe RESistance RANGe Sets the 2W resistance measurement range Parameter Range lt NRf gt MIN MAX Example SENS RES RANG 1000 Sets the resistance range to 1kQ SENSe RESistance RANGe Returns the 2W resistance measurement range Parameter None MIN MAX SENSe FRESistance RANGe Sets the 4W resistanc
101. on menu Return Format page 130 or from the SYSTem OUTPut FORMat command page 168 Example SAMP COUN 100 VALT gt 0 333E 4 V DC gt 0 389E 4 V DC gt etc for 100 counts Queries 100 counts of stored samples from the 1 display 165 GW INSTEK GDM 8261 User Manual VAL2 Returns the 2 display reading in the unit format specified in the Configuration menu Return Format page 130 or from the SYSTem OUTPut FORMat command page 168 Example SAMP COUN 100 VAL2 gt 0 345E 4 V DC gt 0 391E 4 V DC gt etc for 100 counts Queries 100 counts of stored samples from the 2 display TRIGger SOURce Selects the trigger source Parameter INT EXT Example TRIG SOUR INT Sets the trigger source as internal TRIGger SOURce Returns current trigger source TRIGger DELay Sets the trigger delay in milliseconds Parameter lt NRf gt 0 9999 MIN MAX Example TRIG DEL MAX Sets the trigger delay to the maximum TRIGger DELay Returns the trigger delay time in milliseconds Parameter None MIN MAX TRIGger AUTO Turns Trigger Auto mode on off Parameters ON OFF Example TRIG AUTO OFF Turns the Trigger Auto mode off TRIGger AUTO Returns the Trigger Auto mode Return parameter 0 1 0 OFF 1 ON SAMPIe COUNt Sets the number of samples Parameter lt NR1 gt 1 9999 MIN MAX Example SAMP COUN 10 Sets the number of samples to 10 166 GW INSTEK REMOTE CONTROL SAM Ple COUNt Returns
102. p control mode control mode front panel operation press the LOCAL key ake Configure USB Interface USB device port 1 Press the Shift key the 2nd SHIFT EXIT MENU configuration Menu key the left key aD repeatedly until the I O configuration menu appears D I Iil of LL I I 1 L 2 P he D k d th Right ker The USB section 7 display appears ICICI 3 LL ELE TEREE IJL 3 Press the Down key The USB ON OFF selection appears smed GEEZ CST NN me a cee ltl mE J 122 GY INSTEK REMOTE CONTROL Insert GPIB Card P he Up D k select ON or OFE Press the Enter key followed by G the Exit key The USB setting is ENTER stored and the display goes back to the default display Connect the USB cable to the reat panel terminal uppet port Ke Power Off Open the GDM 8261 optional communication port Turn the Power Off and take out the power cord Take off the two screws on the slot corners to remove the optional communication port cover Keep the screws for later reuse 123 GW INSTEK GDM 8261 User Manual Insert the GPIB Insert the GPIB card into the slot Close the cover by card tightening the screws Pa Ex CCN TT Os N SI Ny NN i Ny Re ES IS SSG SEI NG gt g Power On Connect the power
103. page 20 240 V 220 00 L OG L Fuse Socket Holds the main fuse TN 100 120 VAC 0 315AT 220 240 VAC 0 125AT For fuse replacement details see page 240 179 gt Y 3 ora RS 232C port nee Accepts an RS 232C cable for remote control DB 9 male connector For remote control details see page 127 17 GY INSTEK USB device port CAL key port Digital I O port Optional slot x1 Optional Communication port 18 GDM 8261 User Manual sl Accepts a USB device cable for remote control Type female connectot For remote control details see page 122 CAL KEY Reserved for internal purposes such as firmware updates and calibration DIGITAL I O Accepts a digital I O cable for the Hi Lo limit tests DB 9 pin female connectot For digital I O details see page 115 Accepts the optional 16 channel scanner module For scanner details see page 96 wy J U AN MAX RATING 16 CHANNEL C 250V 2A SCANNER O Accepts an optional GPIB or Ethernet card GW INSTEK GETTING STARTED Set Up Tilt Stand Pull out the handle sideways and rotat
104. pears rive HO LIN Ist display Shows A Zero setting 3 Select the setting using the Up Down key 4 Press the Enter key to confirm SHIFT EXIT your selection Press the Exit ENTER key to go back to the default display 85 GY INSTEK GDM 8261 User Manual ADC Speed Setting Background Speed Rate Settings Panel operation 86 The analog to digital converters have a Quick and Accurate Speed setting The ADC Speed settings only apply to DCV DCI or 2 4W resistance measurements The ADC Speed settings can only be set if DCV DCI or 2 4W mode is active Setting Quick Accurate default Accurate The Speed settings depend on the operating mode and the rate settings Readings s Function Rate Digits Accurate Quick DCV DCI 2 4W S 6 Vs 5 30 1000 M 5 1 or 100MQ 41 240 2400 1 Ensure a DC related DCV page 26 measurement function is DCI page 30 selected 2 4W page 32 SHIFT EXIT MENU pE Press the Shift key followed by the 2nd Menu key Press the right key twice The SET ADC menu appears JIL Jl Press the Down key the right key and then the down key The Speed settings menu appears reir TT sd HL PP IE PIL LLIN Ist display Shows the Speed setting GY INSTEK SYSTEM DISPLAY CONFIGURATION 4 Use the Up D k da GN aaa QUICK Press the Enter key to confirm SHIFT EXIT your selection Press the Exit ENTER key to go back to the default
105. plier from which this instrument was purchased GY INSTEK SAFETY INSTRUCTIONS Safety Guidelines General Guideline AN CAUTION Make sure that the voltage input level does not exceed DC1000V AC750V Make sure the current input level does not exceed 10A Do not place any heavy object on the GDM 8201 Avoid severe impact or rough handling that can lead to damaging the GIDM 8261 Do not discharge static electricity to the GDM 8261 Use only mating connectors not bare wires for the terminals Do not block or obstruct the cooling fan vent opening Do not perform measurement at the source of a low voltage installation or at building installations Note below Do not disassemble the GDM 8261 unless you are qualified as service personnel Note EN 61010 1 2001 specifies the measurement categories and their requirements as follows The GDM 8201 falls under category I or II Power Supply WARNING Measurement category IV is for measurement performed at the source of low voltage installation Measurement category III is for measurement performed in the building installation Measurement category II is for measurement performed on the circuits directly connected to the low voltage installation Measurement category I is for measurements performed on circuits not directly connected to Mains AC Input voltage 100 120 220 240 V AC 10 45Hz to 66Hz 360Hz to 440Hz The power supply voltage should not fluctuate
106. processing The filter affects the amount of noise included in the measurement result Filter type The digital filter averages a specific number of input sional samples to generate one reading The filter type defines the averaging method The following diagrams highlight the differences between the Moving and Repeating filter using 4 samples per reading Moving The Moving filter takes in one new default sample and discards the oldest sample per reading This is the default behavior when the digital filter is not specified and is recommended for most applications except for the optional scanner operation page 96 3rd reading Sample 3 6 2nd reading Sample 2 5 lst reading Sample 1 4 Sample 1 2 3 4 5 6 7 8 9 10 lI 12 Repeating The Repeating filter renews a whole group of samples per reading This method is recommended when using the optional scanner page 96 Ist reading 2nd reading 3rd reading Sample 1 4 Sample 5 8 Sample 9 12 Sample 1 2 3 4 5 6 7 8 9 10 11 12 75 GY INSTEK Filter count Filter Setting Turn on Filter 76 GDM 8261 User Manual Filter count defines the number of samples to be averaged per reading More samples offer low noise but long delay Less samples offer high noise but short delay Range 2 100 1 Press the Shift key followed by SHIFT EXIT FILTER the MX MN Filter key gt WAT TT Peer MH In And LIVE LI ILI Ist display Shows the filter count 2nd di
107. r key to confirm SHIFT EXIT your selection Press the Exit ENTER key to go back to the default display Note The current instrument settings have been saved To enable the settings at power up follow the instructions in the next section Recall Instrument Settings Background The Recall function enables saved settings or default settings to be recalled at power up Parameter Recall 0 5 0 recall default settings SHIFT EXIT MENU Recall 1 Press the Shift key followed by Instrument the 2nd Menu key The aD Setting SYSTEM menu appears ee of CCTM LL LL I AJI JIL 2 P he D key foll d b dataan iaa ta KD Recall menu appears ao 5 aow I EICI I OCFo LICEE WLELIILL 3 Press the Down key to enter the Recall menu 94 GY INSTEK STORE RECALL vom II LL Ai m I i Ist a Shows the memory number Select the memory number using the Up Down key Press the Enter key to confirm SHIFT EXIT your selection Press the Exit ee key to go back to the default display When the instrument is reset or upon the next power up the recalled settings will be enabled 95 GW INSTEK GDM 8261 User Manual SCANNER OPTIONAL The optional scanner GDM SC1 lets you effectively measure multiple channels connected to a single GDM 8261 DMM SCAN STEP ACV DCV Installation GDM SC1 Scanner Specifications
108. r length All channels have a common measurement item In addition to the above Simple Scan settings the advanced mode has custom settings for each channel such as measurement item range and rate Sets the duration between each scan loop Scan operation or between each scanned channel Step operation Sets the number of scan operations loop Internal Continuous External Manual Scan Scan The GDM 8261 keeps triggering continuously until the scan reaches the end of the loop count Then it goes into the idle mode The GDM 8261 stays in the idle mode by default The trigger timing is manually controlled by the user from the front panel using the Trig key Measures all specified channel ranges Channel MIN MAX for each trigger event Timer settings page 106 are applied between each scan for the whole channel range CH CH CH lt H CH CH CH CH CH Cr CH H 101 102 103 104 101 102 103 104 101 102 103 104 Count Delay 2 3 4 Delay 5 6 7 8 Delay 9 10 11 12 Example Scan channels 1 4 with a count setting of 12 GY INSTEK SCANNER OPTIONAL Step Measures a single channel in the specified range Channel MIN MAX at each trigger event Timer settings page 106 apply for each channel Step CH CH CH CH CH CH 101 102 103 104 101 102 Timer Timer O Timer O Timer Timer Timer Timer Count Delay 1 Delay 2 Delay 3 Delay 4 Delay 5 Delay 6 12 Example Step through channel 1 4 with a count
109. r query For example the query SENSe UNIT can be expressed in 2 valid forms Square Brackets ISENSe JUNIT or UNIT Command Set CONFgu ure Volge DG uaroiniiiar a E E EA 141 CONPFigure O Lace AC sivas sccsssansnnsetataccuavanneiericnaagndacesehansabaagaodiutexsuaatind 141 NE NE 141 KO GN Eee OE TE 141 KE RESISTANCE EE EE 141 KO NESE EEE ER TE EE 142 ETEN OE iriiria a 142 ONE NN 142 ONE ON vrede 142 FR DIODE aac 4vv4v44444 ea 142 CONFigure TEM Perature TCOUpIe ccscccesseceseeeeseeeeseeeeeeeeneeeeeeeeaees 142 ECONF ETE TEM Perature FR TD eneinio 142 CONfFgpure TEM Perature RT Duun siare inae e e venues 143 CON Figure FUNCTtION ee eeeeecceseceseceseceseeeeeeseeeseceaeceaeceaeeeeeeeeeeeeaeeeaes 143 CON Figure RANGE occeiecaiseriiswcissnzeincesettiauceestsnstiatdinsdaesntentaehtbuedautndpehenteauns 143 NPE Na 143 CONFigure AUTO se ste esrronsanaunsectaerteciianner toot yentesteanens attendees S 143 CONFICUIEZ VOLTAGE DC sic ssosicusapaessdsacecconieaawantionadapetotaesobiasaasenteguea ies 143 NENNE 144 ENN 144 COM Pi gvire2 CURR ME AG rpm aED A Ea 144 COIN PIG SE ge NE EE 144 EE EEE eie 144 CONFUZ FRE EN 145 CO NFISUPE2 PE RIOG Let ETET E 145 FE Ir secus a onea i 145 CON Figure FUNCOM sunis eeii e 145 ENN 145 133 GW INSTEK GDM 8261 User Manual CORRIE U MN 145 FR AUTO serieen e E E 145 MEASu re VOLlage DC re 146 IEA S UG VO ET GE sadacovanteeneaneddncoiseneane 146 MEASURE CUR ROME D
110. ree smmmmrvrrvrrrrrvorrrvernenn 8 overview ovnnnenennnnenenenenensnenennnnnnnnenenennnnenenene 132 Environment Compare value PAN 8 REE E eater 61 SOE EE E 3 Continuity F scanner configuration srrrsrrrenvrrnvrrennrnr 98 SELLING eennnnnrnnvrrranrvrrrranevevrrsaveverersaserersssenn 35 TO 176 Crest TAC OL a soca rcnzecrueatecesscauevensaconnteanvenweneteess 29 EE ae ae 178 GY INSTEK GDM 8261 User Manual Frequency scanner configuration r mrrrrvrevrrnvernne 98 NN resect E AEN E ace 38 Frequency period gate UME SHN T aesir 88 input port setting Luvnmvmunmdmsndstn 87 Front panel EEE A EEE 12 Fuse AC fuse replacement rrnrrrnnrornnvornnvennnnr 179 current fuse replacement rrrnrronvrnnvnnrn 180 safety INstruction EE 8 G Getting Started chapter srrsnnnrnnnnrvnnnrrnnenn 10 GPIB configuration srrannrrnvrrnverrrrrerrrrnnernn 124 GPIB installation uuvssesssemasnasieee 123 Indicator 0 EE 25 Input resistance EE ene ee ee eter ee iene ere renner meron te 79 K Ne EE 78 L Line voltage safety instruction mrsrrrnrnrrnne 7 M Maim features srsorcenrrrsiiinirnrn ea 11 Math EE 66 VG DE BS oons EEA 64 MLS EEE 66 EN 64 Standard deviation sreronrrrronrvrrrrrrennreen 67 SEE EE 67 Measurement keys Nr 13 MENU EN 181 Monitor channel s ressnsesnvsesnnseensesnvsesnnsesnnee 112 O Output key faq uundvisnenmnasnsdemeidedunn 176 194 P Period scanner configuration
111. reennresnnsesnnsesnvsesnnsssnnsssnnee 158 SENSe VOLTage AC RESolution nmrnnrrennrnrnrervrrnvrrnrrrerrrenserrrerensrennennn 159 SENSe JCURRent DC RESoOIlution nrresnnresnnresnnresnnresnnresnnsesnnsesnnsssnnsesnnee 159 SENSe JCURRent DC RESolution mmmrsnnrenvrrnvrrerrrervrrnrersrrrrrrrersrennennn 159 SENSe JCURRent AC RESolution s ruarersarsrsanvrennvrsenessensssnnsesnrssannssanesee 159 136 GW INSTEK REMOTE CONTROL SENSe JCURRent AC RESolution ee eeseesseeseceteceseeeseeceaeenseeseneseeesnes 159 SENSe JRESIstance RESolution srrnrrnnerenrrrrnrnrenrnrenrnrenrneenressrensrnesennne 159 SENSe JRESIstance RESolution esrraonveonvrenrvsnnveennrsnvvsenssenvsenssenvssensee 159 SENSe JFRESIstance RESolution rrronreronrnnrnrnrernrrnrnrenrerrrrnrnressnrseennne 159 SENSe FRESistance RESOIUtION srrrennrenvrrnvrrenrrrnvernrrrerrrenrrersrensernene 159 SENSeJCON inuity RESOlutiGh umesvnsuuesmsensiedtssevesndensni 160 SENSE JCON Tinuity RESOution s cssccsscnssusssvessacccamentncssvcacenssucderwenssccuause 160 SENSe JDIODe RESOIution smssrersarsrenvresnvresnvresnnsesnvsesnnsesnesesnnsesnnseese 160 SENSe JDIODe RESolution n emerenvvsorvoonvrervrennrenvrsnnvennvrsnvssnnseensrenvssensee 160 SENSe JTEMPerature TCOuple RESolution rrrronnnronrnrrnvnrrnrvrrnrnrrnnneen 160 SENSe TEMPerature TCOuple RESolution rrrrnrnronnrrnvrrnrrrennvenvernnrn 160 SENSe JTEMPerature FRTD R
112. rent Burden 24 Hour 4 90 Day 1 Year Temperature Rangel Voltage 23 C 1 C 23 C45 C 23 C45 C Coefficient C 100 0000 pA lt 0 015 V_ 0 01 0 02 0 04 0 025 0 05 0 025 0 002 0 0030 1 000000 mA lt 0 15V 0 007 0 005 0 030 0 005 0 05 0 005 0 002 0 0005 10 00000 mA lt 0 07V 0 005 0 010 0 030 0 020 0 05 0 020 0 002 0 0020 100 0000m A lt 0 7 V 0 01 0 004 0 030 0 005 0 05 0 005 0 002 0 0005 1 000000 A lt 0 8 V 0 05 0 006 0 080 0 010 0 100 0 010 0 005 0 0010 10 00000 A lt 0 5 V 0 10 0 008 0 120 0 008 0 15 0 008 0 005 0 0008 Accuracy Specifications of reading of range Continuity 24 Hour l 90 Day 1 Year Temperature Range Test Current 23 C 1 C 23 C 5 C 23 C 5 C Coefficient C 4 1000 000Q 1mA 0 002 0 030 0 008 0 030 0 010 0 030 0 001 0 002 Accuracy Specifications of reading of range Diode Test P 24 Hour 1 90 Day 1 Year Temperature Rangel Test Current 23 C 1 C 23 C 5 C 23 C 5 C Coefficient C 19 1 000000 V 1 mA 0 002 0 010 0 008 0 020 0 010 0 020 0 001 0 002 Accuracy Specifications of reading of range 184 GW INSTEK APPENDIX Measuring Characteristics DC Voltage Input Resistance Range 10MQ or gt 10GQ nd Selectable Iv 10MQ or gt 10GQ Selectable 10V 11 11MQ 1 100V 10 1MQ 1 1000V 10 1MQ 1 Input Bias 30pA Typ 25 C Input Protection 1000V on all ranges Measurement Method Sigma delta A D Conve
113. rent measurement as 0 0234 mA MEASure CURRent AC Returns the AC voltage measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS CURR AC gt 0 387E 2 Returns the AC current measurement MEASure RESistance 146 Returns the 2W resistance measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS RES gt 1 181372E 6 Returns the 2W measurement GDM 8261 User Manual GW INSTEK REMOTE CONTROL MEASure FRESistance Returns the 4W resistance measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS FRES gt 1 181372E 6 Returns the 4W measurement MEASure FREQuency Returns the frequency measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS FREQ gt 0 215029E 5 Returns the frequency 21 5 kHz MEASure PERiod Returns the period measurement on the first display Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example MEAS PER MAX Returns the maximum period MEASure CONTinuity Returns the continuity measurement on the first display Example MEAS CONT Returns the continuity MEASure DIODe
114. rnernnrrnnrnnernn 77 Display On Off Setting key lock eee 78 Measurement PES GUIS EEE EN 78 Configuration Input Resistance Setting rrrnnnnnnnnonvnnnnnnenenvnvnnr 79 Settings AC Bandwidth Setting siccccictccsecccsacessnssatsansacatsergesses 80 Current Input Port Auto Detect Setting 82 ADC Settings UO 83 UN 85 ADC Speed NN 86 Frequency hud 87 Period settings Gate Time Setting ve ssssssssseessennsseesseennnseeesseees 88 70 GY INSTEK SYSTEM DISPLAY CONFIGURATION Refresh Rate Setting Background Display Range Refresh rate selection Refresh rate defines how frequently the GDM 8261 captures and updates the measurement data A faster refresh rate yields a lower accuracy and resolution Slower refresh rates yield a higher accuracy and resolution Consider this trade off when selecting the refresh rate The refresh rate settings are individually set for all measurement modes except for ACV ACI measurements ACV ACI use the same refresh rate settings HH re FP PITT NM 7 Li LIJA tll S 6 1 2 digits M 5 1 2 digits F 4 1 2 digits Press the Shift key followed by the SHIFT EXIT RATE AUTO Rate key The refresh rate indicator switches to the next rate setting Refresh Rate S M F S View Serial Number Background Panel operation View the serial number using the System menu 1 Press the Shift key the 2nd key SHIFT EXIT MENU followed by down and the l
115. rnn 26 Voltage AC DC Voltage Measurement rrnnnrnnnrnnernnennnrrnernnn 26 Select Voltage Range cccsscssscesccescesecesscesccesens 27 Voltage Conversion Table rrrnrnnnrnnnrnnrrnnrnnnrnnernnn 28 Crest Factor Ta DIC erreneren a ieena 29 Current AC DC Current Measurement onnnnnnnnnnonvnnvnnnnennr 30 Select Current Range c cccsscssscesecesccescesecesceesens 31 Resistance 2W 4W Resistance Measurement cece eee eee eee 32 Select Resistance Range cccccssscescnsscesccesceesens 33 Diode Diode ToS Caer eh eer eee ee 34 Continuity NN TES eeren R E eee 35 Set Continuity Threshold rrorrnrrnrrnnornnornnvnnersnen 36 Select Beeper Setting rrrrnrnnnrnnernnernnrrnersnersnrrsnenn 37 Frequency Frequency Period Measurement cecceeeeeeeeees 38 Period Select Frequency Period Voltage Range 39 continued next page 22 GW INSTEK BASIC MEASUREMENT Temperature Temperature Measurement nnnnnnnnnnnnnnnnnnnnnnnnnvnener 40 Select Thermocouple Type cccscssscnsscesccesceesens 41 Set Reference Junction Temperature T CUP 42 Select Temperature Sensor Type 43 SD RTD oera NT 44 23 GW INSTEK GDM 8261 User Manual Basic Measurement Overview Background Basic measurement refers to the eight types of measurements assigned to the upper row keys on the front panel ACV i DCV
116. rsesecwivanaecsanneeneten 170 SAP WES eg 2 AE EE 170 SJENERT r OD 170 TN 170 ENN 170 DN 170 FE arabs bvs are ecg pts tse rnd neice tanta nematic dena aaaoin bade 170 PE 170 EEE ENE NR N 171 PB srs pose terete sass aresrsdatea A E E eee 17 Pr 171 PG 171 IE JE NN cet kasouas 171 FF OE EE E acct TE E PEE E SE EE aan are EE 171 EEE EN 171 Pl 171 EN 171 TV 171 Ri v4v4rv4rvr44vv A E A 171 KOUTE CLAG a A A E N E A E eee re Tee 172 FOUTE PEN 172 ROUTE MULT PIE OPEN siressa 172 ROUTe MULTiple STATe scscnsssiiconnsasntdesndenutisionenasacnbaatiwsnpedsldaandsectisseivaddastetaes 172 ROU Te MUTPE CLOSE ssccassseacxrseseannnvoveenedssveane ieevananecesesczemarvessncstenseusii 172 ROUTE FEN CC Ii arra a E E EEEE OE 172 139 GW INSTEK GDM 8261 User Manual FUN men 172 ROUT CHANDE EE EN 173 ROUTE CHANTE Piinia EAE E ante vacates avaseatvaacn 173 ROUTE C OUNT oreore ng 173 ROUTE OUN a S E 173 ROUT DEEI are a A E nssenaepaceciniatansnmeeraastiac 173 ROUTA 2 EEE NE 173 ROUTES STATE aacssccnsavocatigetmttante vee E 173 ROUTE NN 174 PUMPE 174 UTEN oarenien E AEA 174 ROUTE SCAN FIN alt oy cise sasancsiccisecice acess ocupinseveselsctttmcetsoysacaceootenecsnatcndeeaeieerencs 174 ROUEN 174 ROUTE NR ee 174 NOTS C ANTON EEE EEE 174 INPut IMPedance AUTO rronnnrorennnnvrrnnnnverennnrerennnnvnnsnnnvenennnenennnnnnnsnnnnenene 174 INPut IMPedance AUTOD cccsccssssccssssccssscccssseecsseeecssseecsseecsseeeessaeeesees 174 NTE ane 174 FT
117. rter Resistance Max Lead 10 of range per lead for 1000 1 kQ ranges I kQ Resistance per lead on all other ranges Input Protection 1000 V on all ranges Measurement Method Selectable 4 wire or 2 wire ohms Current source referenced to LO input mner Shunt Resistor 100Q for 100uA 1mA 50 for 10mA and 100 DE Current mA 0 10 PIA OOQ for 100 Input Protection Externally accessible 1 25A 250 V fuse Internal 12A 600 V fuse Reading Rate Continuity Readings sec Diode Rate Digits Rate Slow 67 100 Mid 5 2 200 Fast 4 300 DCV DCI Resistance Rate Digits Accurate Quick Slow 6 2 5 30 Mid 5 2 60 600 Fast 4 240 2400 1 Accurate Speed setting 2 Relative to calibration standards 3 20 overrange on all ranges except 1000 Vdc 10A range and Continuity and Hold 4 Specifications are for 4 wire ohms function or 2 wire ohms using REL function Without REL function add 0 2 Q additional error in 2 wire ohms function 5 Accuracy specifications are for the voltage measured at the input terminals only 1 mA test current is typical Variation in the current source 185 GY INSTEK GDM 8261 User Manual will create some variation in the voltage drop across a diode junction 6 0 C 18 C 28 C 55 C 7 When making 4W resistance measurements please note the following Due to the Seebeck effect please insert the banana plugs of the 4W test cables into the dedicated female terminals on the GDM 8261 and wait for t
118. s CH1 L Sense H L input amp 9 sense 2 amp 10 88 amp 16 Diode Continuity 2 wires H L 16 CH1 16 Period Frequency 2 wires H L 16 CH1 16 Temperature 2 wires H L 16 CH1 16 98 GW INSTEK SCANNER OPTIONAL Select Channel Group and Enable Scanner Background 16 channels are available for the scanner when using the GDM 8261 Group CH101 118 Select group Set the jumper J8 in the center of the board to the Jumper J8 MASTER configuration Move the jumper to the right pins 2 3 to select CH1xx 101 118 The GDM 8261 does not support the SLAVE operation mode with the optional scanner Enable scanner Set the jumper J9 on the rear side of the board Jumper J9 accordingly Move the jumper up pins 3 2 to disable the scanner and down pins 2 1 to enable the scannet 3 2 1 99 GW INSTEK GDM 8261 User Manual Connect Wires Wire selection Make sure the wires have at least the same voltage and current capacity as the maximum ratings of the measurement Connection 1 Turn the screw left loose using a screw driver and insert the wire Turn the screw right tighten and secure the connection 1 Loosen rA 2 Insert See 3 Tighten ES 2 Route the wires as shown below via the two openings left and right at the front cover AE 4 Qodufugudu du N a seer o ST
119. s The measured value V can be set to be displayed with the measurement units U and or with the count number C Parameter lt NR1 gt 0 3 O V 1 V U 2 V C 3 V U C Example SYST OUTP FORM 3 168 GW INSTEK REMOTE CONTROL SYSTem OUTPut FORMat Returns the output format Return parameter 0 1 2 O V 1 V U 2 V C 3 V U C SYSTem OUT Put EOF Sets the EOL character CR LF LF CR Parameter lt NR1 gt 0 1 2 0 CR LF 1 LF 2 CR Example SYST OUTP EOF 0 Sets the EOL character as CR LF SYSTem OUTPut EOF Returns the EOL character Return parameter lt NR1 gt 0 1 2 O CR LF 1 LF 2 CR SYSTem OUTPut SEParate Sets the command separation character Parameter lt Boolean gt 0 1 O EOL 1 Example SYST OUTP SER 0 Sets the command separation character as the EOL character SYSTem OUTPut SEParate Returns the command separation character Return parameter lt Boolean gt 0 1 0 EOL 1 SYSTem SERial Returns the serial number eight characters numbers SYSTem PARameter SAVE Saves the system parameters into 1 of 5 memory slots Parameter lt NR1 gt 1 5 Example SYST PAR SAVE 1 Saves the system parameters to memory 1 SYSTem PARameter LOAD Load the system parameters from 1 of 6 memory locations Parameter lt NR1 gt 0 5 0 Default settings 1 5 memory number Example SYST PAR LOAD 0 Loads the default system parameters SYSTem PARameter LOAD Returns the loaded system parameters Re
120. s bac E OEA 154 E NSS TORNIT ey he 154 SEN Se RUN CUO 2 0 acs sesssiesnsaceiiyesshpvatevacednngsitanntedellesndvsndvsstosccednsantieac 154 PEIN SS EOIN vr 155 PSEINSE WV EP RANN md 155 135 GW INSTEK GDM 8261 User Manual SENSe JVOLTage DC RANGe ceecccssseceseeesseeceseeceeeceaeeceaeeesaeeneeeeaees 155 SENSE NOLTE AC RAIN Ge sne ciasioastelocemsceusiaasbed dosuaavisnoasoenias 155 SENSe VOLTage AC RANGE c cccsccsssssetscsssesssesesscsseesstssenscsseeseeesenens 155 SENSE JCUR Rene DG RAIN Bnr 155 SENSe JCURRent DC RANGE csscssccssecsscenssenssenssseesseesscenssenssonsenes 155 SENSE ICUR RENE AGC RANG PS Lura e 155 SENSE CURRENT AC RAN Ge eee 155 SENSe RESistance RANGe ssssssssssesssssssssreesssssssrressssssssesssssssrreesssssesees 156 SENSe RESistance RANGE cecccsccssseessecstecesceeesecsseeseeeeeeseeeenseenseens 156 SENSe FRESistance RANGe ds 156 SENSE JPRESISLINGE RANGE uken kddndde 156 SENSe FREQuency VOLTage RANGE nnrrnnnnnrnnnnnnrvrnnnnrrnnnnervrnnnnnnnnnssene 156 SENSe FREQuency VOLTage RANGE ccccscceseeseeseceteesseeeeeeeseeseeens 156 SENSe PERiod VOLTage RANGE cccssccsssccssrccsesccessccenscesssccenseeones 156 SENSe PERiod VOLTage RANGE ccssssesscessesssesesscessesstesensceseesseees 156 SENSe J VOLTage DC RANGe AUTO rrnnnnnvnnnnvrnnnnnevvrnnnvrrnnnnersennnnnrnnesven 156 SENSe VOLTage DC RANGe AUTO 1 eecccsseeseeeteesteeeseeeesees
121. saasecacsetve dannsesnnnioestinateneeer 97 SS SCA EET 104 Og a a E EE EE E EEE 111 EE O oeer eE EE E E EERE 114 Digital I O Terminal Configuration 115 EMOTE CONTROL vn 121 Configure Interface ccccccssccnssccsseeneseceeees 122 Command Syntax aie ceetcnscnmantoecartatapoatansseaunions 132 onder en 133 LO EE EU 176 PRPPENDIA eeren E E E E EE E A EA 177 ee ER VOR OIT ore E 178 Fuse Replacement ccccccsccesccssceseseeceeseeees 179 Mee 181 5 oe Ge S eere 183 EC Declaration of Conformity rrrrnnrnnnrnnnerr 192 GW INSTEK Table of Contents GY INSTEK GDM 8261 User Manual SAFETY INSTRUCTIONS This chapter contains important safety instructions that you must follow when operating the GDM 8261 and when keeping it in storage Read the following before any Operation to insure your safety and to keep the GDM 8261 in the best possible condition Safety Symbols These safety symbols may appear in this manual or on the GDM 8261 AN WARNING AN CAUTION po OPP Warning Identifies conditions or practices that could result in injury or loss of life Caution Identifies conditions or practices that could result in damage to the GDM 8261 or to other property DANGER High Voltage Attention Refer to the Manual Protective Conductor Terminal Earth ground Terminal Do not dispose electronic equipment as unsorted municipal waste Please use a separate collection facility or contact the sup
122. sagatnradeeasaoaiarousiesabadess 165 Cube MAT H MB Factor siccacecesccensaes ccasuscnnmdoseneasquispenveeeansaccenesaiadeseanas 165 ATTEN 165 CALC late MATH PER CE ssicicinconnceasasccicencinncetiacnthsreceentadddeonoeceensasacenianee 165 CALC ulate MATH PERCGHIE uses teveaandusaietanatansunasnsatinnninlasniese 165 EN DE 165 EE EEE EE EEE EE NE 165 NE EN NN 166 TREL OURE EE 166 TER VEE ed 166 MP ve 166 TEPPE O 166 Ge OE EE 166 VEN er a E scar sutton A T ES 166 SAMPE UM 166 AMPE ON 167 TRIG Er COUNT aE E SE E N 167 TRIGO COUN D er E A E 167 VENN 167 MA EN eee 167 SYo 101 BEE PESTA TE EEE 168 Syo lern BEEP NN 168 eae BEE PET nd RP er aa ane EAE ee eee 168 SV STEM BEE PEPER ROW 2 sccsiniavaiacsisesntevavennsadetesniaratseoinsaseanvavetasaneeiGanniasanians 168 TE 168 SYS Temi VERSION seouar rera irria NSE AAEE Ea 168 138 GW INSTEK REMOTE CONTROL SETE a EE EN E 168 SETE BSE E E 168 YS len OWT PUG FORM airinn ndG 168 SET RS eg ONE NE 169 TN PEN aane AE 169 SEE 16 OE je GE ncatereusnaesuausmneseeneioes 169 TT OT PU FRE 169 SYSTEM OUT PUPS EP arate jade eiorinn 169 JE ge EE ANE EEE 169 SYSTEM PARAMEIEN SAVE sverdene iranerne n ea beast 169 SYSTEM PAR IME LOAD use delatndn 169 SYSTem PARameter LOAD nrnronnrnronnrnronnrrronnrorennrerennvnrennvesennresennvesnnn 169 STATus QUEStionable ENABle srrrrnnnroronnnrornnnnrvnronnnrnrsnnnrnnrnnnnvnnnnnvennnn 170 STATUS QUESton ble ENABIE 0 sc ccssvacnsnseancysunnevanensaca
123. shold to 500 SENSe JCONTinuity THReshold Returns the continuity threshold SENSe JCURRent DETect Sets the current auto detect mode on or off for the current functions Parameter ON OFF Example SENS CURR DET ON Turns the current auto detect on for the current function SENSe JCURRent DETect Returns the auto detect status for the current functions Return Parameter 0 1 1 ON 0 OFF SENSe DIGital SHIFt Sets the Digital Shift function on or off Parameter ON OFF Example SENS DIG SHIF ON Turn the digital shift function on SENSe DIGital SHIFt Returns the Digital Shift function status Return Parameter 0 1 1 ON 0 OFF SENSe JUNIT Sets the temperature unit Parameter C F Example SENS UNIT C Sets the temperature unit to C SENSe JUNIT Returns the temperature unit SENSe JFUNCtion 1 2 Returns the function displayed on the first or second display Return parameter display 1 VOLT VOLT AC CURR CURR AC RES FRES FREQ PER TEMP RTD TEMP TCO DIOD CONT NON 2nd display only 154 GW INSTEK REMOTE CONTROL SENSe FUNCtion 1 2 Sets the function for the first or second display Parameter VOLT DC VOLT AC CURR DC CURR AC RES FRES FREQ PER TEMP RTD TEMP TCO DIOD CONT NON 2nd display only Example SENS FUNCT VOLT DC Sets the 15 display to the VDC function SENSe VOLTage DC RANGe Sets the DC V
124. splay Shows the filter type flashing 2 Seed er ng de type using the HETT TIL Ld MATTI FEN eh LCI SHU 3 Move the cursor to filter count HOLD TRIG using the Left Right key Change the value using te Up Down key T DET Vt Cet LINI LI th pr 4 Press the Enter key to confirm editing The Filter indicator appears on the display sie j Hum omuognoc 4 LiL VL 1 a FILT Indicates manual Filter setting GY INSTEK Turn off Filter SYSTEM DISPLAY CONFIGURATION Press the Shift key followed by the SHIFT EXIT FILTER MX MN Filter key The Filter indicator will disappear from the display Display Setting Display Light Setting Background Panel operation The display light setting adjusts the brightness of the display reading Use light 3 or more brighter when working indoor use light 2 or 1 darker when working outdoor under the sun Level 5 brightest 1 darkest default 3 1 Press the Shift key followed by SHIFT EXIT MENU the 2nd Menu key The system aD menu appears CCTM LL LL I 2 Press the Down key then the Right key twice The light menu gt TRO TRG appears ae ae Ne kr km dl bn level setting appears IL TT LIST tLtiyti I Ist display Shows the current display light level 77 GY INSTEK GDM 8261 User Manual 4 Select the level using th 5 Press the Enter key to confirm SHIFT
125. splay in the same way as for single measurement operation See the Basic Measurement chapter for details To turn Off the 2nd measurement op press and hold the 2nd key for more than 1 second hold 1 sec 49 GY INSTEK Connect the test leads and measure 50 GDM 8261 User Manual When using the dual measurement function the connection method and number of test leads required depends on the measurement combination Use the connect diagrams below as guide when taking dual measurements Voltage and Frequency Period Measurement eseseseeesee eeeee eeeeene Q 4W INPUT SENSE VQ gt pocoo GY INSTEK DUAL MEASUREMENT Voltage Frequency Period Resistance and Current Measurement Q 4W INPUT SENSE eeececececececemocececececececececececececececcceccc co Note Current measurements will be displayed as a negative value as the polarity of the current leads has been reversed Please take into account the resistance of the test leads and internal resistance of the current connection as itis in series with the test circuit The above measuring contiguration is used to measure the voltage present on the resistance under test and the current through the resistance under test when using the DCI DCV or ACI ACV dual measurement function 51 GY INSTEK GDM 8261 User Manual pvancep MEASUREMENT
126. splay shows the Min Max range Press the 2nd key to view the Max OND Min value AC AUTO S MAX I VL TEFTN ANOJCUu I Ltt tht t tity 2nd display Indicates that the Max Min value is displayed on the 1st display Ist display Shows the Max Min value at full scale To cancel the Max Min vere measurement press the MX MN key for 2 seconds or simply activate hold for 2 another measurement seconds 57 GY INSTEK GDM 8261 User Manual Relative Value Measurement Applicable to Background 1 Activate Relative measurement 2 Relative measurement display appears View reference REL value Reference REL measurement display appears Manually set the 1 reference value 58 acv ocv aci ner zaw k TEMP Relative measurement stores a value typically the data at the moment as the reference The following measurement is shown as the delta between the reference The reference value will be cleared upon exit Press the REL key The REL measurement reading at the moment becomes the reference value AC S REL od ee I ge tre LILL tt tbl REL Indicates Relative value measurement 2nd display Shows the measurement range Ist display Shows the delta between the current measurement data and the reference value Press the 2nd key to view the OND reference REL value RE Plt held tlt gt OJIA t tit 2nd display In
127. stem to wait for trigger mode and to store readings 174 GW INSTEK REMOTE CONTROL FETCh Transfer the stored readings to the output buffer DATA POINts Returns the number of readings Parameter None lt NR1 gt 0 2 0 Store 1 Scan 2 Stats 175 GW INSTEK GDM 8261 User Manual AQ What is the Output key used for pressed the EXIT key but cannot get out of Scanner mode e The GDM 8261 performance does not match the specifications What is the Output key used for The Output key is used for turning the display output on or off as well as locking the front panel keys on off pressed the EXIT key but cannot get out of Scanner mode Press the Exit key followed by the ACV Scan or DCV Step key The GDM 8261 performance does not match the specifications Make sure the device is powered On for at least 1 hour This is necessary to stabilize the unit to match the specifications If there is still a problem please contact your local dealer or GWInstek at marketine goodwill com tw 176 GW INSTEK APPENDIX ppen DIX System Info Firmware NNN 178 Fuse Replace AC Source Fuse nrannrrnnernnernnvrnurnnernnernnen 179 Replacement Replace Input Current Fuse rrrnnrnnnvrnnvrnnvrrnnennee 180 Menu Tree Ment TW Cia tec ca ecttde een cere esaee ieee eee eee eodee ese 181 Specifications EE TEEN 183 B R GE Stes Ot scaccccnuteedenssedasmnceattreatenaencee 184 PC TN Le 186 Frequency and Period
128. surement mode to TCO with a type J sensor CONFigure TEMPerature FRTD 142 Sets the measurement mode to 4W RTD measurement mode on the first display Sets the sensor type Parameter None Type PT100 D100 F100 PT385 PT3916 USER Example CONF TEMP FRTD PT100 Sets the sensor type to PT100 and sets the measurement mode to 4W RTD GW INSTEK REMOTE CONTROL CONFigure TEMPerature RTD Sets the measurement mode to 2W RTD measurement mode on the first display Sets the sensor type Parameter None Type PT100 D100 F100 PT385 PT3916 USER Example CONF TEMP RTD PT100 Sets the sensor type to PT100 and sets the measurement mode to 2W RTD CONFigure FUNCtion Returns the current function on 1st display Return parameter VOLT VOLT AC CURR CURR AC RES FRES FREQ PER TEMP RTD TEMP TCO DIOD CONT CONFigure RANGe Returns the current range on 1 display Return Parameter DCV 0 1 100mV 1 1V 10 10V 100 100V 1000 1000V ACV 0 1 100mV 1 1V 10 10V 100 100V 750 750V ACI 0 001 1mA 0 01 10mA 0 1 100mA 1 1A 10 10A DCI 0 0001 1004A 0 001 1mA 0 01 10mA 0 1 100mA 1 1A 10 10A RES 10E 1 100 2 10E 2 1kQ2 10E 3 10kQ2 10E 4 100k 2 10E 5 1MQ 10E 6 10MQ 10E 7 100M Q CONFigure AUTO Sets Auto Range on or off on the first display Parameter ON OFF Example CONF AUTO ON CONFigure AUTO Returns the Auto Range status of the function on the 1 display Return Para
129. t MIN MAX DEF Example CONF RES 10e3 MIN Sets the range to 10kQ with the lowest resolution 141 GW INSTEK GDM 8261 User Manual CONFigure FRESistance Sets measurement to 4W Resistance on the first display and specifies the range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF FRES 10e3 MAX Sets the measurement mode to AW with a range of 10kQ at the maximum resolution CONFigure FREQuency Sets measurement to Frequency on the first display and specifies range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF FREQ MAX MAX Sets the frequency measurement range to max and the resolution to max CONFigure PERiod Sets measurement to Period on the first display and specifies the range resolution Parameter None Range lt NRf gt MIN MAX DEF Resolution lt NRf gt MIN MAX DEF Example CONF PER Sets the DMM to period measurement using the previous range resolution CON Figure CON Tinuity Sets measurement to Continuity on the first display Parameter None CONFigure DIODe Sets measurement to Diode on the first display Parameter None CONFigure TEMPerature TCOuple Sets measurement to Temperature thermocouple T CUP on the first display Parameter None Type B E J K N R S T Example CONF TEMP TCO J Sets the mea
130. t the range The AUTO indicator turns Off automatically If the appropriate range is unknown select the highest range Range Resolution Full scale slow rate 100mV 0 1uV 119 9999mV 1V lu V 1 199999V 10V 10uV 11 99999V 100V 100u V 119 9999 750V AC ImV 750 000V 1000V ImV 1000 000V DC For more detailed parameters see the specifications on pagel83 27 GW INSTEK GDM 8261 User Manual Voltage Conversion Table This table shows the relationship between AC and DC reading in various waveforms Waveform Peak to Peak AC DC True RMS Sine 2 828 1 000 0 000 UE Rectified Sine 1 414 0 435 0 900 full wave Rectified Sine 2 000 0 771 0 636 half wave FN FY PK PK Square 2 000 1 000 0 000 cn Rectified 1 414 0 707 0 707 Square PK PK Rectangular 2 000 2K 2D Pulse x PK PK K D D D X Y gt D X Y Triangle 3 464 1 000 0 000 Sawtooth NE 28 GY INSTEK Crest Factor Table Background Waveform Square wave Sine wave Triangle sawtooth Mixed frequencies SCR output 100 10 White noise AC Coupled pulse train Spike BASIC MEASUREMENT Crest factor is the ratio of the peak signal amplitude to the RMS value of the signal It determines the accuracy of AC measurement If the crest factor is less than 3 0 voltage measurement will not result in error due to dynamic range limitations at full scale If the crest factor is more than 3 0 it usually in
131. t for the frequency function Parameter 0 1 2 O volt 1 1A 2 10A Example SENS FREQ INP 0 Sets the input jack to the Volt input port SENSe JFREQuency INPutjack Returns the assigned input port used for the frequency function Return Parameter VOLT TA 10A SENSe JPERiod INPutjack Assigns an input port for the period function Parameter 0 1 2 O volt 1 1A 2 10A Example SENS PER INP 0 Sets the input jack to the Volt input port SENSe JPERiod INPutjack Returns the assigned input port used for the period function Return Parameter VOLT TA TOA SENSe DETector BAN Dwidth Sets the AC bandwidth AC filter Parameter 3 20 200 Example SENS DET BAND 20 Sets the AC bandwidth to 20Hz SENSe DETector BAN Dwidth Returns the AC bandwidth SENSe JZERO AUTO Sets the Auto zeroing mode to on off or once only Parameter ON OFF ONCE Example SENS ZERO AUTO ONCE Sets the auto zeroing to once only SENSe JZERO AUTO Returns the Auto zero mode Return Parameter 0 1 1 ON 0 OFF SENSe JGAIN AUTO Sets the Auto gain mode to on off or once only Parameter ON OFF ONCE Example SENS GAIN AUTO OFF Turns the Auto gain mode off 153 GW INSTEK GDM 8261 User Manual SENSe JGAIN AUTO Returns the Auto gain mode Return parameter 01 1 ON 0 OFF SENSe JCONTinuity THReshold Sets the continuity threshold in ohms Parameter lt NRf gt 0 1000 Example SENS CONT THR 500 Sets the continuity thre
132. te another measurement 118 GY INSTEK Application Background Signal connection 1 Activate external trigger DIGITAL I O External trigger The GDM 8261 uses the internal trigger by default for example to count the frequency and the period Using an external trigger allows for customized triggering conditions Connect the external trigger signal to the Digital I O port located on the rear panel High Limit FAIL Out LOW Limit FAIL Out FAIL I EOM Out 6789 12345 VCC Out PASS Out NC Digital chassis Ground External Trigger In Pin4 External Trigger Input pin Connection pigital O Pin 4 l Terminal 7 Trigger input Pin 3 Pulse width sy timing oV 23usS Press the Shift key followed by the SHIFT EXIT INT EXT Trig key The EXT indicator appears on the display 119 GW INSTEK GDM 8261 User Manual 2 Start trigger Press the Trig key to start triggering manually The indicator turns On PIE dt te ITIJGOE th Reading indicator The reading indicator stays On before triggering After triggering the indicator flashes according to the external signal trigger timing Exit external Press the Shift key followed by the SHIFT EXIT INT EXT trigger Trig key The EXT indicator gt disappears and the trigger goes back to internal mode 120 GY INSTEK Interface Command Syntax Command Set REMOTE CONTROL REMOTE CONTROL
133. ter key followed by da gt the Exit key The SEP setting is ENTER stored and the display goes back to the default display 129 GY INSTEK GDM 8261 User Manual Set the Return Format Description Configuration 130 When the VAL1 VAL2 TRACe DATA and FETCh queries are used the return measurement format can be configured in one of four ways V value V U value unit V C value count V U C value unit count See page 165 and 166 for usage examples Note The READ query will not return values based on the return format settings see page 165 for details Format Description Example V Value 0 503E 4 V U Value Unit 0 503E 4 V DC V C Value Count 0 503E 4 00001 V U C Value Unit Count 0 503E 4 V DC 00001 1 Press the Shift key the 2nd SHIFT EXIT MENU Menu key the left key repeatedly until the TX TERM configuration menu appears N LEVEL FE LIM FA LE JV TN 2 Press the Down key the Right ae ve key The FORMAT menu appears T CE Se Kose tl FLINT 3 Press the Down key The FORMAT selection menu appears AT LL N re L ee SSE GY INSTEK 4 V Press the Up Down key to select the Return format ALITTLE Werewolf HUIL TLOI Po ly Vor Press the Enter key followed by the Exit key The return format setting is saved and the display goes back to the default display REMOTE CONTROL AUTO SHIFT EXIT gt Q E
134. to specify the type of temperature sensor used RTD type Range Resolution All based on 200 600 C 0 001 C PT100 Press the Shift key then the TEMP SHFT EXT SENSOR Sensor key The sensor selection menu appears on the display LEVEN f FL EL I SE T pE BIN P he Left and Righ k se a ad i oL AWRID sensor type Press the down key to gt v go to the next menu level Tf l of IN En 1 ame Li T Litt 6 yi LYNS OI I 1 DF 43 GY INSTEK 3 Select sensor 4 Confirm and go back to the default display Set User RTD Background 1 Open sensor selection menu 2 Select sensor type 44 GDM 8261 User Manual Press the Up and Down keys to highlight the RTD sensor type RTD Type PT 100 PT 3916 PT 385 F 100 D 100 USER i 9 Press the Enter key to confirm SHIFT EXIT IT FT ILI LT LT Press the Exit key to go back to the ENTER default display The USER setting allows any custom RTD sensor coefficients to be used The USER setting can configure the alpha beta and delta coefficients as defined by the Callendar Van Dusen equation Coefficient range Alpha 0 000000 10 00000 Beta 0 000000 10 00000 Delta 0 000000 10 00000 Press the Shift key then the TEMP SHIFT Ex T SENSOR Sensor key The sensor selection menu appears on the display Jt Pol IN mn _ vad ad FL
135. tomatically set the PLC to the closest acceptable PLC value 0 025 0 1 0 25 1 2 12 Parameter NPLCycles lt NRf gt MIN MAX Example SENS RES NPLC MIN Sets the integration time to 0 025 PLCs for 2W resistance measurements 161 GW INSTEK GDM 8261 User Manual SENSe RESistance NPLCycles Returns the integration time for 2W resistance measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds Return parameter 0 025 0 1 0 25 1 2 12 SENSe FRESistance NPLCycles Sets the integration time for 4W resistance measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds For any lt NRf gt parameter the DMM will automatically set the PLC to the closest acceptable PLC value 0 025 0 1 0 25 1 2 12 Parameter NPLCycles lt NRf gt MIN MAX Example SENS FRES NPLC MAX Sets the integration time to the maximum for 4W resistance measurements SENSe FRESistance NPLCycles Returns the integration time for 4W resistance measurements in PLCs power line cycles Where one PLC is equal to 16 6 milliseconds Return parameter 0 025 0 1 0 25 1 2 12 CALCulate Commands CALCulate FUNCtion Sets the Advanced function Parameter OFF MIN MAX HOLD REL COMP DB DBM STORE AVER MXB INV REF Example CALC FUNC REL Sets the Advanced function to REL relative CALCulate FUNCtion Returns the current Advanced function CALCulate STATe Turns the Adva
136. tt 11 GY INSTEK GDM 8261 User Manual Front Panel Overview Main Measurement Sense Lo Sense Hi Display Keys DC AC 1A Terminal Terminal Z Input Hi EK cGom s261 6 Digit Dual M ment Multimet Terminal AC DC 2W4W AUTO FMS HOLD RELMIN MAX i RMT i I Hd m I i E an T papampam cena t GN NI NN HN DN Gp Kor FENG Input Lo s ie Terminal D SHIFT EXIT SCAN STORE dBm dB SENSOR a 1 FE 08208 0 E wo a ia mo T e wan 2ND J NE DC AC 10A NG i ENTER LU RANGE choices 2 J LOCAL A CATY soov Terminal E AS ae LJ LA 7 I F iA TE TF EI Power Switch Main Display AMPS Fuse Output On Off Key Holder Power Switch POWER Turns Ona or Off WE the main power For the power up sequence see page 20 Main Display Shows measurement results and parameters For display config
137. turn parameter lt NR1 gt 0 5 0 Default settings 1 5 memory number 169 GW INSTEK GDM 8261 User Manual STATus Report Commands STATus QUEStionable ENABle Set bits in the Questionable Data Enable register STATus QUEStionable ENABle Returns the contents of the Questionable Data Enable register STATus QUEStionable EVENt Returns the contents of the Questionable Data Event register STATus PRESet Clears the Questionable Data Enable register Example STAT PRES RS 232C Interface Commands SYSTem LOCal Enables local control front panel control and disables remote control SYSTem REMote Enables remote control and disables local control front panel control IEEE 488 2 Common Commands CLS Clears the Event Status register Output Queue Operation Event Status Questionable Event Status Standard Event Status ESE Returns the ESER Event Status Enable Register contents Example ESE gt 130 Returns 130 ESER 10000010 ESE Sets the ESER contents Parameter lt NR1 gt 0 255 Example ESE 65 Sets the ESER to 01000001 170 GW INSTEK REMOTE CONTROL ESR Returns and clears SESR Standard Event Status Register Example ESR gt 198 Returns 198 SESR 11000110 IDN Returns the manufacturer model No serial number and system version number Example IDN gt GWlInstek GDM8261 00000000 1 0 OPC 1 is placed in the output queue when all the pending operations are completed OPC
138. um rating of 500Q All the outputs are active low Pins 5 9 Digital O Pin 1 output Terminal wiring diagram Pin5 PASS signal Output Activates when the compare result is PASS 115 GY INSTEK Application Applicable to Background 1 Activate Compare measurement 2 High limit setting 116 Pin6 Pin Pin8 Pin9 GDM 8261 User Manual FAIL signal Output Activates when the compare result is FAIL HIGH Limit FAIL signal Output Activates when the compare result is FAIL due to violating the HIGH Limit LOW Limit FAIL signal Output Activates when the compare result is FAIL due to violating the LOW Limit EOM End Of Measurement signal Output Activates when compare measurement is overt EOM pulse yey width timing ff ov k gt 10us R 1kQ Compare measurement Aov pev aci por 24w Hap TEMP Compare measurement checks and updates if the measurement data stays between the upper high and lower low limit specified Press the Shift key then the Hold SHIFT EXIT COMP Comp key gt IMANANN p gt aaa o 9 Zn B LLE Ist display Shows the high limit value 2nd display Indicates high limit setting 1 Use the Left Right key to move the cursor flashing point between high low setting digits and decimal point GY INSTEK 3 Low limit setting 4 Compare measurement appears 5 Result DIG
139. uration details see page 77 light setting Sense Lo As a fuse protects the instrument from DC AC 1A over current Rating T1 25A 250V Terminal For the fuse replacement procedure see AMPS Fuse 250V page 180 Holder As a sense terminal accepts 4W Q 12 measurement LO connection For details see page 32 Also accepts current input DC 100uA 1A AC 1mA 1 For details see page 30 GW INSTEK GETTING STARTED Sense HI Terminal Accepts HI sense line in 4W resistance measurement For details see page 32 Input Lo Terminal Accepts ground COM line in all measurements except the sense line in AW Resistance page 32 Input Hi Terminal DL Used as an input port for all N measurements except for DC AC KOM Current measurements zDC1000V MAC 750V DC AC 10A Moa Accepts DC AC Current input Terminal ASS For DCI or ACI details see page 30 Main Display OUTPUT Turns the display on or off When the Output On Off i display is turned off all panel keys key gt except the Output On Off key become disabled The Output On Off key is On by default Measurement Keys upper row SHIFT EXIT SHIFT EXIT The Shift key is used to select the secondary functions assigned to each front panel key When pressed the SHIFT indicator appears in the display As the Exit key it gets out of the parameter configuration mode and goes back to the measurement result display mode ACV A
140. using the Left Right key and ch he val i meUp Dowskey nn 11 i 13 14 15 When finished press the Enter key The channel setting appears ae The Minimum first scanned channel as set in the Simple Scan setting appears The default setting is CH101 DC AUTO S PL i FI LET 7 Lit IE 140 Set the measurement conditions e To select measurement item R press the target key To select Auto range press RATE the AUTO key press the Up Down key When finished press the Right key to confirm the edit and to move to the next channel When all channel configurations SHIFT EXIT SCAN are completed press the Exit key followed by the ACV or DCV key The display goes back ME STEP to the default mode gt ocv 109 GY INSTEK GDM 8261 User Manual Use External Trigger Background Signal connection Digital I O pin assignment Activate external trigger Start trigger The GDM 8261 uses the internal trigger by default Using an external trigger allows customized triggering Connect the external trigger signal to the Digital I O port located on the rear panel o ofa DB 9 female DIGITAL I O o caje O o High Limit FAIL Out LOW Limit FAIL Out FAIL EOM Out 6789 O Na 12345 VCC a PASS Out NC External Trigger In Digital chassis Ground Pin4 External Trigger Input pin Press the Shift key followed by the SHIFT EXIT I
141. ximum Minimum Average and Standard deviation Number of User Defined 2 100 000 counts counts Continuous 9 999 999 count Press the Shift key the 2 4W Math SHIFT EXIT MATH key the Up key The Analyze Stats gt setting menu appears m I En MI vT Fi te 4 PIL TLL Lin FUN 67 GY INSTEK 2 Set Count 2a Continuous count 2b User defined count 68 GDM 8261 User Manual Press the Enter key to set the number of measurements counts See that will be used for the Stats function The Count menu appears _ ge SEIS sen I TIIT FRE I L LIINI TIN Ist display Shows the count number as continuous 2nd display Indicates the count setting 1 To set the count to Continuous and to start measurement press nee Enter when CONTINU is displayed on the 1st display 2 Measurement starts automatically 1 To set a user defined count ae or number press the Left key followed by Up when CONTINU is displayed on the screen The Count setting menu will appear ITITI Lt Lt LLL Ist display Shows the count number 2 100 000 2nd display Indicates the count setting 2 Use the Left Right key to move the flashing point cursor and the count number 3 Press the Enter key to confirm editing and to start ENTER measurement use the Up Down key to change GY INSTEK 3 View Data Stop Restart Measuring Exit ADVANCED MEASUREMENT

Instek GDM-8261 Digital Multimeter

Contents

Download Pdf Manuals

Related Search

Related Contents