Home

National Instruments 1/2-Digit User's Manual

1. Calibrator Output niDMM_ConfigureMeasurement Parameters Iteration Amplitude Frequency Function Range Resolution 1 50 mV 50 Hz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 50 Hz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 2 50 mV 1 kHz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 3 50 mV 1 kHz NIDMM_VAL_AC_VOLTS 4 5 500e 9 50 mV 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 5 500e 9 4 50 mV 20 kHz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 20 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 9 50 mV 50 kHz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 50 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 6 50 mV 100 kHz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 100 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 7 50 mV 300 kHz NIDMM_VAL_AC_VOLTS 0 05 50e 9 50 mV 300 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e 9 14 Output 500 mV at 30 Hz on the calibrator 15 16 17 National Instruments Corporation Call niDMM_ConfigureMeasurement with the following parameters s Function NIDMM_VAL_AC_VOLTS_DCCOUPLED e Range 0 5 e Resolution 500e 9 Call niDMM Read Verify that this measurement falls between the limits listed in Table 16 Refer to Table 3 for the appropriate calibrator outputs and parameter values as you complete the following steps a On the calibrator output the value listed in the Calibrator Output column in Table 3 for the current ite
2. d ar 2 Year Limits 24 Hour Limits Amplitude Range Input Resistance Lover Upper Lover Upper OV 1V gt 10 GQ 10 MQ 6 uV 6 uV 2 uV 2 uV OV 10 V gt 10 GQ 10 MQ 60 UV 60 uV 20 uV 20 uV OV 100 V 10 MQ 600 uV 600 uV 200 uV 200 uV OV 300 V 10 MQ 6 mV 6 mV 1 8 mV 1 8 mV 100 mV 100 mV gt 10 GQ 10 MQ 0 099994 V 0 100006 V 0 099998 V 0 100002 V NI 4070 4072 Calibration Procedure 58 ni com Table 15 NI 4070 4072 DC Voltage Verification Limits Continued 2 Year Limits 24 Hour Limits Calibrator Amplitude Range Input Resistance Lover Upper Lover Upper 100 mV 100 mV gt 10 GQ 10 MQ 0 100006 V 0 099994 V 0 100002 V 0 099998 V 1V 1V gt 10 GQ 10 MQ 0 999969 V 1 000031 V 0 999992 V 1 000008 V 1V IV gt 10 GQ 10 MQ 1 000031 V 0 999969 V 1 000008 V 0 999992 V 10 V 10 V gt 10 GQ 10 MQ 9 99969 V 10 00031 V 9 99994 V 10 00006 V 10 V 10 V gt 10 GQ 10 MQ 10 00031 V 9 99969 V 10 00006 V 9 99994 V 100 V 100 V 10 MQ 99 9959 V 100 0041 V 99 9992 V 100 0008 V 100 V 100 V 10 MQ 100 0041 V 99 9959 V 100 0008 V 99 9992 V 300 V 300 V 10 MQ 299 9835 V 300 0165 V 299 9964 V 300 0036 V 300 V 300 V 10 MQ 300 0165 V 299 9835 V 300 0036 V 299 9964 V AC Voltage Table 16 NI 4070 4072 AC Voltage Verification Limits Cal
3. National Instruments Corporation Call niDMM CalAdjustGain with the following parameters 8 Mode NIDMM VAL 2 NIRE RES e Range 100e6 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibrator for 0 Q Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 2 WIRE RES e Range 100e6 Input Resistance NIDMM VAL RESISTANCE NA Output 100 kQ on the calibrator with external sense turned on but without 2 wire compensation Call niDMM CalAdjustGain with the following parameters e Mode NIDMM VAL 4 WIRE_RES e Range 100e3 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibrator for 100 kQ Output 0 Q on the calibrator with external sense turned on but without 2 wire compensation Call niDMM CalAdjustGain with the following parameters e Mode NIDMM VAL 4 WIRE_RES e Range 100e3 Input Resistance NIDMM_VAL_RESISTANCE_NA e Expected Value the display on the calibrator for 0 Q Output 10 kQ on the calibrator with external sense turned on but without 2 wire compensation Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL 4 WIRE_RES e Range 10e3 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibrator for 10 kQ Output 0 on the calibrator with external sense turned on but without 2 wire compensation Call niDM
4. No Is this a Pre Adjustment or Post Adjustment Verification Go to Adjustment Pre Adjustment Procedures Flowchart Post Adjustment Go to Completing the Adjustment Procedures Figure 4 Verification Procedures Flowchart NI 4070 4072 Calibration Procedure 66 ni com Verification y Go to Adjusting DC Voltage and Resistance Adjust AC Voltage Modes Go to Adjusting AC Voltage Modes Adjust Current Modes Go to Adjusting Current Modes Go to Adjusting Capacitance and Inductance Perform Post Adjustment Verification Go to Verification Procedures Flowchart Go to Completing the Adjustment Procedures Figure 5 Adjustment Procedures Flowchart National Instruments Corporation 67 NI 4070 4072 Calibration Procedure Where to Go for Support The National Instruments VVeb site is your complete resource for technical support At ni com support you have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electronic compatibility EMC and product safety You can obtain the DoC for your product by
5. NIDMM_EXTCAL_MISCCAL_SECTION You have completed adjusting the current modes of the NI 4070 4072 Select one of the following options Ifyou are calibrating an NI 4070 refer to one of the following sections e Verification Procedures to verify your new calibration coefficients before saving them to the EEPROM e Completing the Adjustment Procedures if you do not want to verify the adjustments you have just made Ifyou are calibrating an NI 4072 refer to the Adjusting Capacitance and Inductance NI 4072 Only section Adjusting Capacitance and Inductance NI 4072 Only Ifyou are calibrating an NI 4070 skip this section and select one of the following options e Ifyou want to verify the new calibration coefficients before saving them to the EEPROM repeat the Verification Procedures section except for the Initial Setup section e Ifyou do not want to verify the new calibration coefficients go to the Completing the Adjustment Procedures section NI 4070 4072 Calibration Procedure 56 ni com e Ifyou are calibrating an NI 4072 you must complete this section to attain a valid calibration Caution It is necessary to adjust DC voltage and resistance before running these adjustment steps During this procedure be sure to keep hands and any other moving objects away from the fixture after calling every function To adjust the capacitance and inductance of the NI 4072 complete the following steps 1 2 Disc
6. two year calibration interval You can shorten the calibration interval based on the demands of your application Refer to Appendix A Calibration Options for more information Test Equipment This section describes the required and optional equipment for calibration Required Test Equipment Requirements for All NI 4070 4072 Devices The following equipment is required for calibrating the NI 4070 4072 Fluke 5700A multifunction calibrator calibrated within the last 90 days or a Fluke 5720A multifunction calibrator calibrated within the last year e Two sets of Fluke 5440 low thermal electromotive force EMF copper cables e Pomona 5145 insulated double banana plug shorting bar or another means of creating a short with low thermal EMF lt 150 nV across the HI and LO input banana plug connectors on the NI 4070 4072 e Two Pomona B 4 banana to banana patch cords cables or similar banana to banana cables with length not to exceed 4 in e National Instruments PXI chassis and controller or a personal computer PC with an available slot for the NI 4070 4072 Additional Requirements for the NI 4072 The following equipment is required for calibrating the capacitance and inductance modes of the NI 4072 e 25 Q 125 Q 5 KQ and 100 KQ resistors with thermal drift SS ppm C and tolerance lt 1 The distance between the resistor leads and the NI 4072 terminals should be lt 1 in e Verification capacitors calibrated t
7. 15 Output 1 V on the calibrator Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 1 Resolution 1e 6 12 ni com 45 46 47 48 49 50 51 52 53 54 55 56 DI National Instruments Corporation Set the input resistance of the NI 4070 4072 to 510 GQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Output 1 V on the calibrator Set the input resistance of the NI 4070 4072 to 510 GQ by calling niDMM SetAttributeViReal64 with the following parameters e Attribute_ID NIDMM ATTR INPUT RESISTANCE e Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e Attribute_ID NID
8. Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 10 Resolution 10e 6 Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE e Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 6 ni com 12 13 14 15 16 17 18 19 20 21 22 National Instruments Corporation Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS
9. calibrator Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL DC CURRENT e Range 0 2 Input Resistance NIDMM VAL RESISTANCE NA e Expected Value 0 2 Output 0 A on the calibrator Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL DC CURRENT e Range 0 2 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM CalAdjustoffset with the following parameters Mode NIDMM VAL AC CURRENT e Range 0 1 Input Resistance NIDMM VAL RESISTANCE NA Output 1 A on the calibrator Call niDMM_CalAdjustGain with the following parameters Mode NIDMM VAL DC CURRENT e Range 1 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value 1 Output 1 A on the calibrator 55 NI 4070 4072 Calibration Procedure 22 CallniDMM CalAdjustGain Vith the follovving parameters e o Mode NIDMM VAL DC CURRENT e Range 1 Input Resistance NIDMM VAL RESISTANCE NA e Expected Value 1 23 Output 0 A on the calibrator with the current output set to NORM 24 Call niDMM_CalAdjustOffset with the following parameters e Mode NIDMM_VAL_DC_CURRENT e Range 1 Input Resistance NIDMM_VAL_RESISTANCE_NA 25 Call niDMM_CalAdjustOffset with the following parameters e Mode NIDMM VAL AC CURRENT e Range 1 Input Resistance NIDMM VAL RESISTANCE NA 26 Call niDMM_CalAdjustMisc with Type set to
10. e Ifyou are performing a pre adjustment verification call niDMM_close to close the session e Ifyou are performing a post adjustment verification go to the Completing the Adjustment Procedures section NI 4070 4072 Calibration Procedure 40 ni com Adjustment Procedures This section explains how to adjust the NI 4070 4072 You can choose to perform these adjustment procedures with or without performing the verification procedures first The parameters Range Resolution Expected Measurement and Frequency used in function calls in this section have floating point values For example if Range 1 the floating point value is 1 0 Refer to the NI Digital Multimeters Help for more information about parameter values 3 Note NI recommends repeating the verification procedures after you perform these adjustment procedures Reverification ensures that the device you have calibrated is operating within specifications after adjustments Caution If you skip any of the steps within a section of the adjustment procedures NI DMM does not allow you to store your new calibration coefficients Instead NI DMM restores the original coefficients to the EEPROM Setting Up the Test Equipment If you have not already set up the test equipment complete the following steps 1 Remove all connections from the four input banana plug connectors on the NI 4070 4072 2 Verify that the calibrator has been calibrated within the time limits specified in
11. e Range 100 e Resolution 100e 6 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e Attribute_ID NIDMM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS Range 300 e Resolution 300e 6 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Remove the shorting bar from the NI 4070 4072 Reset the calibrator Fasten the connectors on one end of the Fluke 5440 cable to the appropriate banana plug connectors of the NI 4070 4072 and fasten the connectors on the other end of the cable to the appropriate calibrator binding posts Figure 1 shows the correct connections Table 1 lists the cable connections 9 NI 4070 4072 Calibration Procedure Ny NATIONAL INSTRUMENTS 61 Digit FlexDMM OUTPUT SENSE VOA va GROUND 1 NI 4070 4072 2 Fluke 5700A 5720A Calibrator 3 Fluke 5440 Cable Figure 1 Cable Connections for Voltage and 2 Wire
12. one end of the coaxial cable to the Pomona 4892 double banana plug Tighten the other end of the coaxial cable in the screw terminal channels 5 and 39 of the TB 2715 terminal block Connect the TB 2715 with the coaxial cable attached to the NI 6608 Plug the Pomona 4892 into the HI and LO terminals of the NI 4070 4072 Call niDMM_reset to reset the NI 4070 4072 to a known state Call niDMM_ConfigureMeasurement with the following parameters e Function NIDMM VAL FREQ e Range 1 e Resolution 0 Call niDMM_ConfigureFrequencyVoltageRange with Voltage Range set to 5 Call GPCTR Control with the following parameters e deviceNumber the device number of the NI 6608 assigned by Measurement amp Automation Explorer MAX e o gpctrNum ND_COUNTER_0 e action ND RESET Call GPCTR Set Application with the following parameters deviceNumber the device number of the NI 6608 assigned by MAX e gpctrNum ND_COUNTER_0 e application ND PULSE TRAIN GNR Call GPCTR Change Parameter with the following parameters e deviceNumber the device number of the NI 6608 assigned by MAX e gpctrNum ND_COUNTER_0 e paramID ND COUNT 1 e paramValue 10e6 85 NI 4070 4072 Calibration Procedure 12 13 14 15 16 17 Call GPCTR Change Parameter with the following parameters e deviceNumber the device number of the NI 6608 assigned by MAX
13. resistance instead of absolute limits because the limits depend on the actual resistance value output by your calibrator Table 18 NI 4070 4072 2 Wire Resistance Verification Tolerances Calibrator 2 Year Tolerance 24 Hour Tolerance Resistance Range ppm of Range ppm of Range 0Q 10 KQ 40 ppm 20 ppm 0Q 1kQ 400 ppm 200 ppm 0Q 100 Q 4000 ppm 2000 ppm 100 MQ 100 MQ 6040 ppm 920 ppm 10 MQ 10 MQ 410 ppm 102 ppm 1 MQ 1MQ 100 ppm 22 ppm National Instruments Corporation 61 NI 4070 4072 Calibration Procedure Table 18 NI 4070 4072 2 Wire Resistance Verification Tolerances Continued Calibrator 2 Year Tolerance 24 Hour Tolerance Resistance Range ppm of Range ppm of Range 100 KQ 100 kQ 86 ppm 17 ppm 10kQ 10kQ 83 ppm 14 ppm 1kQ 1kQ 83 ppm 14 ppm 100 Q 100 Q 90 ppm 25 ppm DC Current Table 19 NI 4070 4072 DC Current Verification Limits 2 Year Limits Calibrator Amplitude Range Lower Upper OA 20 mA 1 5 HA 1 5 UA OA 200 mA 4 UA 4 UA OA 1A 20 UA 2QuA 20 mA 20 mA 19 989 mA 20 011 mA 20 mA 20 mA 20 011 mA 19 989 mA 200 mA 200 mA 199 916 mA 200 084 mA 200 mA 200 mA 200 084 mA 199 916 mA 1A 1A 0 99945 A 1 00055 A 1A 1A 1 00055 A 0 99945 A AC Current Table 20 NI 4070 4072 AC Current Verification Limits Calibrator O
14. the following options e Ifyou want to continue verifying other modes go to the Verifying 4 Wire Resistance section e If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section e Ifyou do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session Verifying 4 Wire Resistance To verify the 4 wire resistance of the NI 4070 4072 complete the following steps 1 Reset the calibrator 2 Fasten the connectors on one end of each Fluke 5440 cable to the appropriate banana plug connectors on the NI 4070 4072 Fasten the connectors on the other end of each Fluke 5440 cable to the appropriate calibrator binding posts Figure 2 shows the Fluke 5440 cables Table 7 lists the cable connections O 8 O Ps 6 4 Digit FlexDMM Q 1A 250V SOY AM OUTPUT VOA 1 NI 4070 4072 2 Fluke 5700A 5720A Calibrator 3 Fluke 5440 Cables Figure 2 Cable Connections for 4 Wire Resistance NI 4070 4072 Calibration Procedure 22 ni com Table 7 Fluke 5440 Cable Connections Fluke 5440 Banana Plug Connector Banana Plug Color Binding Post Cable Identification NI 4070 4072 Fluke 5440 Cable Fluke 5700A 5720A Calibrator First cable HI Red OUTPUT HI LO Black OUTPUT LO No connection Bl
15. the value listed in the Calibrator Output column in Table 6 for the current iteration b Call niDMM_ConfigureMeasurement with Mode set to NIDMM VAL AC VOLTS and the remaining parameters as shown in Table 6 for the current iteration c CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 d CallniDMM ConfigureMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 Table 6 niDMM_ConfigureMeasurement Parameters Calibrator Output niDMM_ConfigureMeasurement Parameters Iteration Amplitude Frequency Function Range Resolution 1 219 V 50 Hz NIDMM_VAL_AC_VOLTS 300 300e 6 219 V 50 Hz NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e 6 2 219 V 1 kHz NIDMM_VAL_AC_VOLTS 300 300e 6 219 V 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e 6 3 219 V 20 kHz NIDMM_VAL_AC_VOLTS 300 300e 6 219 V 20 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e 6 219 V 50 kHz NIDMM_VAL_AC_VOLTS 300 300e 6 219 V 50 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e 6 5 70 V 300 kHz NIDMM_VAL_AC_VOLTS 300 300e 6 70V 300 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e 6 National Instruments Corporation 21 NI 4070 4072 Calibration Procedure 31 Reset the calibrator for safety reasons You have completed verifying the AC voltage of the NI 4070 4072 Select one of
16. visiting ni com certification If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial 512 795 8248 For telephone support outside the United States contact your local branch office Australia 1800 300 800 Austria 43 662 457990 0 Belgium 32 0 2 757 0020 Brazil 55 11 3262 3599 Canada 800 433 3488 China 86 21 5050 9800 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 385 0 9 725 72511 France 33 0 1 48 14 24 24 Germany 49 89 7413130 India 91 80 41190000 Israel 972 3 6393737 Italy 39 02 413091 Japan 81 3 5472 2970 Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 2005151 Taiwan 886 02 2377 2222 Thailand 662 278 6777 Turkey 90 212 279 3031 Un
17. 0 Hz on the calibrator 19 Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_AC_VOLTS_DCCOUPLED Range 5 Resolution 5e 6 20 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 16 NI 4070 4072 Calibration Procedure 18 ni com 21 Refer to Table 4 for the appropriate calibrator outputs and parameter values as you complete the follovving steps a On the calibrator output the value listed in the Calibrator Output column in Table 4 for the current iteration b Call niDMM_ConfigureMeasurement with Mode set to NIDMM VAL AC VOLTS and the remaining parameters as shown in Table 4 for the current iteration c CallniDMM_Read Verify that this measurement falls between the limits listed in Table 16 d CallniDMM ConfigureMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 Table 4 niDMM_ConfigureMeasurement Parameters Calibrator Output niDMM_ConfigureMeasurement Parameters Iteration Amplitude Frequency Function Range Resolution 1 5V 50 Hz NIDMM_VAL_AC_VOLTS 5 5e 6 5V 50 Hz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 2 5V 1 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 5V 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 3 5V 1 kHz NIDMM_VAL_AC_VOLTS 50 50e 6 5V 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUP
18. 0 mV 500 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 500e3 9 500 mV 1 NIDMM_VAL_AC_VOLTS 0 5 1e3 500 mV 1 NIDMM VAL AC VOLTS DCCOUPLED 0 5 1e3 NI 4070 4072 Calibration Procedure 50 ni com Table 13 niDMM_CalAdjustACFilter Parameters Continued Calibrator Output niDMM_CalAdjustACFilter Parameters Frequency Range Frequency Iteration Amplitude kHz Mode V Hz 10 500 mV 5 NIDMM_VAL_AC_VOLTS 0 5 5e3 500 mV 5 NIDMM_VAL_AC_VOLTS_DCCOUPLE 055 5e3 11 500 mV 20 NIDMM VAL AC VOLTS 0 5 20e3 500 mV 20 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 20e3 12 500 mV 50 NIDMM_VAL_AC_VOLTS 0 5 50e3 500 mV 50 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 50e3 13 500 mV 100 NIDMM_VAL_AC_VOLTS 0 5 100e3 500 mV 100 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 100e3 14 500 mV 200 NIDMM_VAL_AC_VOLTS 055 200e3 500 mV 200 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 200e3 15 500 mV 300 NIDMM_VAL_AC_VOLTS O25 300e3 500 mV 300 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 300e3 16 500 mV 500 NIDMM_VAL_AC_VOLTS 0 5 500e3 500 mV 500 NIDMM_VAL_AC_VOLTS_DCCOUPLE 0 5 500e3 17 5V 1 NIDMM VAL AC VOLTS 5 1e3 SV 1 NIDMM VAL AC VOLTS DCCOUPLE 5 1e3 18 SV 5 NIDMM_VAL_AC_VOLTS 5 5e3 5V 5 NIDMM_VAL_AC_VOLTS_DCCOUPLE 5 5e3 19 5V 20 NIDMM_VAL_AC_VOLTS 5 20e3 5V 20 NIDMM VAL AC VOLTS DCCOUPLE 5 20e3 20 5V 50 NIDMM_VAL_AC_VOLTS 5 50e3 5V 50 NIDMM_VAL_AC_VOLTS_DCCOUPLE 5 50e3 21 5V 100 NIDMM_VAL_AC_VOLTS 5 100e3 5V 100 NIDMM_VAL_A
19. AC voltage mode steps if you do not use the AC voltage modes or if the AC voltage accuracy is irrelevant Omitting DC AC current mode steps if you do not use the current modes or if the DC AC current accuracy is irrelevant Omitting both AC voltage and DC AC current mode steps if you do not use those modes or if the accuracy of those measurements is irrelevant NI 4070 4072 Calibration Procedure 64 ni com Table 23 Summary of Adjustment Options Adjustment Optional Required DC Voltage Y Resistance Y AC Voltage Y AC DC Current Y lt Inductance and Capacitance Y NI 4072 only National Instruments Corporation 65 NI 4070 4072 Calibration Procedure Verify DC Voltage Mode Go to Yes Initial Setup No Verify AC Voltage Mode Yes No 4 Wire Resistance Yes Go to Verifying DC Voltage Go to Verifying AC Voltage Go to Verifying 4 Wire Resistance No 2 Wire Resistance Yes No Verify DC Current Mode Yes No Verify AC Current Mode Yes Go to Verifying 2 Wire Resistance Go to Verifying DC Current Go to Verifying AC Current No Verify Frequency Mode Yes No Go to Verifying Frequency Verify Capacitance and Inductance NI 4072 Only Yes Go to Verifying Capacitance and Inductance
20. AVERAGE Attribute Value 20 Note If you use capacitance verification values that differ from the values listed in Table 10 verify that each measurement falls between the tolerances listed in Table 22 The tolerances shown in Table 22 correspond to the NI 4072 accuracy specifications 20 Call niDMM_Read Verify that this measurement falls between the tolerances listed in Table 22 21 Remove the verification capacitor and plug into the H7 and LO banana plug connectors of the NI 4072 the next capacitor to be verified according to Table 10 22 Repeat steps 18 through 21 using the parameters shown in Table 10 for niDMM_ConfigureMeasurement and NIDMM_ATTR_LC_NUMBER_MEAS_TO_AVERAGE for all verification capacitors listed Note If you use capacitance verification values that differ from the values listed in Table 10 verify that each measurement falls between the tolerances listed in Table 22 The tolerances shown in Table 22 correspond to the NI 4072 accuracy specifications Table 10 niDMM_ConfigureMeasurement Parameters qm niDMM Configure Measurement Parameters Verification Capacitor Range Resolution Number of Averages 100 nF 100e 9 10e 12 20 le 6 100e 12 20 10 uF 10e 6 le 9 20 100e 6 10e 9 3 1000 uF le 3 100e 9 3 10e 3 le 6 3 You have completed verifying the capacitance and inductance of the NI 4072 Select one of the following options
21. C_VOLTS_DCCOUPLE 5 100e3 22 5V 200 NIDMM_VAL_AC_VOLTS 5 200e3 5V 200 NIDMM_VAL_AC_VOLTS_DCCOUPLE 5 200e3 23 5V 300 NIDMM_VAL_AC_VOLTS 5 300e3 5V 300 NIDMM VAL AC VOLTS DCCOUPLE 5 300e3 National Instruments Corporation 51 NI 4070 4072 Calibration Procedure Table 13 niDMM_CalAdjustACFilter Parameters Continued Calibrator Output niDMM_CalAdjustACFilter Parameters Frequency Range Frequency Iteration Amplitude kHz Mode V Hz 24 5V 500 NIDMM_VAL_AC_VOLTS 5 500e3 5V 500 NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 500e3 25 50 V 1 NIDMM VAL AC VOLTS 50 1e3 50 V 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 1e3 26 50 V 5 NIDMM_VAL_AC_VOLTS 50 5e3 50 V 5 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 5e3 27 50 V 20 NIDMM_VAL_AC_VOLTS 50 20e3 50 V 20 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 20e3 28 50 V 50 NIDMM_VAL_AC_VOLTS 50 50e3 50 V 50 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 50e3 29 50 V 100 NIDMM_VAL_AC_VOLTS 50 100e3 50 V 100 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 100e3 30 50 V 200 NIDMM_VAL_AC_VOLTS 50 200e3 50 V 200 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 200e3 31 50 V 300 NIDMM_VAL_AC_VOLTS 50 300e3 50 V 300 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 300e3 32 10 V 500 NIDMM_VAL_AC_VOLTS 50 500e3 10 V 500 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 500e3 33 100 V 1 NIDMM VAL AC VOLTS 300 1e3 100 V 1 NIDMM VAL AC VOLTS DCCOUPLED 300 1e3 34 100 V 5 NI
22. DMM_VAL_AC_VOLTS 300 5e3 100 V 5 NIDMM VAL AC VOLTS DCCOUPLED 300 5e3 35 100 V 20 NIDMM_VAL_AC_VOLTS 300 20e3 100 V 20 NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 20e3 36 100 V 50 NIDMM_VAL_AC_VOLTS 300 50e3 100 V 50 NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 50e3 37 100 V 100 NIDMM_VAL_AC_VOLTS 300 100e3 100 V 100 NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 100e3 NI 4070 4072 Calibration Procedure 52 ni com Table 13 niDMM_CalAdjustACFilter Parameters Continued Calibrator Output niDMM_CalAdjustACFilter Parameters Frequency Range Frequency Iteration Amplitude kHz Mode V Hz 38 100 V 200 NIDMM VAL AC VOLTS 300 200e3 100 V 200 NIDMM VAL AC VOLTS DCCQUPLED 300 200e3 39 50 V 300 NIDMM_VAL_AC_VOLTS 300 300e3 50 V 300 NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 300e3 40 10V 500 NIDMM_VAL_AC_VOLTS 300 500e3 10V 500 NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 500e3 9 Reset the calibrator for safety reasons 10 Call niDMM CalAdjustMisc with Type set to NIDMM EXTCAL MISCCAL SECTION You have completed adjusting the AC voltage modes of the NI 4070 4072 Select one of the following options e If you are performing additional adjustments refer to the following sections as applicable Adjusting Current Modes Adjusting Capacitance and Inductance NI 4072 Only Caution For the NI 4072 adjusting the capacitance and inductance is required Skipping this step causes an incorrect adjustment of the
23. LED 50 50e 6 4 5V 1 kHz NIDMM_VAL_AC_VOLTS 300 300e 6 5V 1 kHz NIDMM VAL AC VOLTS DCCOUPLED 300 300e 6 5 SV 20 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 SV 20 kHz NIDMM VAL AC VOLTS DCCOUPLED 5 5e 6 6 5V 50 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 5V 50 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 7 5V 100 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 5V 100 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 8 5V 300 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 5V 300 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 22 Output 50 V at 30 Hz on the calibrator National Instruments Corporation 19 NI 4070 4072 Calibration Procedure 23 Call niDMM ConfigureMeasurement with the following parameters Function NIDMM VAL AC VOLTS DCCOUPLED Range 50 Resolution 50e 6 24 Call niDMM Read Verify that this measurement falls between the limits listed in Table 16 25 Refer to Table 5 for the appropriate calibrator outputs and parameter values as you complete the following steps a On the calibrator output the value listed in the Calibrator Output column in Table 5 for the current iteration b Call niDMM_ConfigureMeasurement with Mode set to NIDMM_VAL_AC_VOLTS and the remaining parameters as shown in Table 5 for the current iteration c CallniDMM_Read Verify that this measurement falls between the limits listed in Table 16 d CallniDMM Configu
24. M CalAdjustoffset with the following parameters Mode NIDMM VAL 4 WIRE RES e Range 100e3 Input Resistance NIDMM_VAL_RESISTANCE_NA 45 NI 4070 4072 Calibration Procedure 46 47 48 49 50 51 52 53 54 55 56 54 NI 4070 4072 Calibration Procedure Call niDMM CalAdjustoffset with the following parameters s Mode NIDMM_VAL_4_WIRE_RES e Range 10e3 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCAL_RREF Call niDMM SelfCal to self calibrate the NI 4070 4072 Output 0 Q on the calibrator with external sense turned on but with 2 wire compensation turned off Call niDMM CalAdjustOffset with the following parameters e Mode NIDMM_VAL_4 WIRE_RES e Range 10e6 e Input Resistance NIDMM_VAL_RESISTANCE_NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 4 VIRE RES e Range 1e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Call niDMM_CalAdjustOffset with the following parameters 9 Mode NIDMM VAL 4 VIRE RES Range 1e3 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM_VAL_4 WIRE_RES e Range 100 e Input Resistance NIDMM_VAL_RESISTANCE_NA Remove the Fluke 5440 cables from the NI 4070 4072 leaving the other end of the cables connected to the cal
25. MM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Output 10 V on the calibrator Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 10 e Resolution 10e 6 Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE e Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 18 NI 4070 4072 Calibration Procedure 58 59 60 61 62 63 64 65 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Output 10 V on the calibrator Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Set the inp
26. M_VAL_1_MEGAOHM 50 50V 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 NIDMM VAL 1 MEGAOHM 50 5 100 V 1 NIDMM_VAL_AC_VOLTS 300 NIDMM_VAL_1_MEGAOHM 100 100 V 2 NIDMM VAL AC _VOLTS_DCCOUPLED 300 NIDMM VAL 1 MEGAOHM 100 5 Refer to Table 12 for the appropriate parameter values as you complete the following steps Output 0 V on the calibrator b CallniDMM CalAdjustOffset with Mode set to NIDMM VAL AC VOLTS and the remaining parameters as shown in Table 12 for the current iteration c Call nipmm_CalAdjusto0ffset again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED 6 Repeat step 5 for each of the remaining iterations shown in Table 12 Table 12 niDMM_CalAdjustOffset Parameters niDMM_CalAdjustOffset Parameters Iteration Mode Range V Input Resistance Q 1 NIDMM_VAL_AC_VOLTS 0 05 NIDMM_VAL_1_MEGAOHM NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 NIDMM_VAL_1_MEGAOHM 2 NIDMM_VAL_AC_VOLTS 0 5 NIDMM_VAL_1_MEGAOHM NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 5 NIDMM_VAL_1_MEGAOHM 3 NIDMM_VAL_AC_VOLTS 5 NIDMM_VAL_1_MEGAOHM NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 NIDMM_VAL_1_MEGAOHM 4 NIDMM_VAL_AC_VOLTS 50 NIDMM_VAL_1_MEGAOHM NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 NIDMM_VAL_1_MEGAOHM 5 NIDMM_VAL_AC_VOLTS 300 NIDMM_VAL_1_MEGAOHM NIDMM_VAL_AC_VOLTS_DCCOUPLED 300 NIDMM_VAL_1_MEGAOHM National Instruments Corporation 49 NI 4070 4072 Calibration Procedure 3 7 Refer to Table 13 for the appropriate calibrator outputs and parameter values as you complete the following steps a On the calib
27. O CALIBRATION PROCEDURE NI 4070 4072 6 Digit FlexDMM This document contains step by step instructions for writing an external calibration procedure for the National Instruments PXI PCI 4070 and NI PXI 4072 digital multimeters DMMs Each of these National Instruments DMMs is a 6V2 digit FlexDMM and 1 8 MS s isolated digitizer For more information on calibration visit ni com calibration Contents CONVENTOS asii tia 2 Software Requirements ooocoocconcnonoononnnoononnnnnncnn non nonn conc co ncnn nono nn crac rnncnn ns 2 Documentation Requirement eee eee eseeeseseeeeeesseesseeeeeseeseeneeaes 3 Calibration Function Reference ooooocinccinccconccinnnnonaconccnonnconccnnnnnonos 3 A meesic saad aioe EE 3 Calibration Interval coords 4 Test EQUI PME N esia a E E aiae Rae ESEE E RESE EES 4 Required Test Equipment 0 0 0 0 ceeccesccesceseceeeceneeeseeeeeeeneeeeaeeenees 4 Optional Test Equipment ooonocnnnonicnnononnnonnnononanonncannrnonn non nnancnnncnn nono 5 Test Conditions emissi skssr cs cheavati subsea anier R ea ia EES 5 Calibration Procedures 0 cceecceescesceeseceseeseeeceseeeseeceseeeeeesaeeseeeneeeenees 6 Initial Seu neos ici eigiiaiepnieeiabs menen se n s 6 Verification Procedures ccesccesseceseeseeceeeeseecsaeeeeeeseeceaeeeneeeeaees 7 Adjustment Procedures 0 ceecceesceesseceseeeseeeeeeeseeceaeeeneceaeeeseeenaees 41 Verification LM iii ito atacat 58 DE Volt geciiosimeittanesm
28. Point with the following parameters e Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 4 Average the results by summing the returned reading array of the function and dividing by the returned actual number of points Store the result as the 100 kQ range offset 26 ni com 28 29 30 31 32 33 34 National Instruments Corporation Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_2_WIRE_RES e Range 10e3 e Resolution 0 01 Call niDMM ConfigureMultiPoint with the following parameters e Trigger Count 1 Sample Count 4 e Sample Trigger NIDMM VAL IMMEDIATE e Sample Interval 1 Call niDMM ReadMultiPoint with the following parameters Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 4 Average the results by summing the returned reading array of the function and dividing by the returned actual number of points Store the result as the 10 kQ range offset Call niDMM_ConfigureMeasurement with the following parameters 9 Function NIDMM VAL 2 NIRE RES e Range 1e3 e Resolution 1e 3 Call niDMM ConfigureMultiPoint with the following parameters e Trigger Count 1 Sample Count 4 e Sample Trigger NIDMM VAL IMMEDIATE Sample Interval 1 Call niDMM ReadMultiPoint with the following parameters e Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 4 Average the results by summing the
29. Resistance Table 1 Fluke 5440 Cable Connections Banana Plug Connector Banana Plug Color Binding Post Label NI 4070 4072 Fluke 5440 Cable Fluke 5700A 5720A Calibrator HI Red OUTPUT HI LO Black OUTPUT LO No connection Blue V GUARD 23 24 25 26 NI 4070 4072 Calibration Procedure Wait two minutes for the thermal EMF to stabilize Generate 0 V on the calibrator Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 0 1 Resolution 100e 9 Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL GREATER THAN 10 GIGAOHM 10 ni com 27 28 29 30 31 32 33 National Instruments Corporation Call niDMM ConfigureMultiPoint with the following parameters e Trigger Count 1 e Sample Count 10 Sample Trigger NIDMM VAL IMMEDIATE e Sample Interval 1 Call niDMM ReadMultiPoint with the following parameters e Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 10 Average the results by summing the returned reading array of the function and dividing by the returned actual number of points Store the result as the 100 mV gt 10 GQ mode offset Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM S
30. Use niDMM_SetCalPassword to change the password 4 NI 4070 4072 Calibration Procedure Call niDMM ConfigurePoverLineFrequency with PowerLine Frequency set to 50 or 60 depending on the power line frequency in hertz that your instruments are powered from select 50 for 400 Hz power line frequencies Output 100 mV on the calibrator with the range locked to 2 2 V Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM_VAL_DC_VOLTS e Range 0 1 e Input Resistance NIDMM VAL 10 MEGAOHM e Expected Measurement 0 1 Output 100 mV on the calibrator Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL DC VOLTS e Range 0 1 e Input Resistance NIDMM VAL 10 MEGAOHM e Expected Measurement 0 1 Output 10 V on the calibrator 42 ni com 10 11 12 13 14 15 16 17 18 19 20 21 22 National Instruments Corporation Call niDMM CalAdjustGain with the following parameters e Mode NIDMM VAL DC VOLTS e Range 10 Input Resistance NIDMM_VAL_GREATER_THAN_10_GIGAOHM e Expected Measurement 10 Output 10 V on the calibrator Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL DC VOLTS e Range 10 Input Resistance NIDMM_VAL_GREATER_THAN_10_GIGAOHM e Expected Measurement 10 Disconnect the Fluke 5440 cable from the NI 4070 4072 banana plug connectors leaving
31. V 5 026 V 5V 300 kHz 5V AC DC 4 8475 V 5 1525 V 50 V 30 Hz 50 V DC 49 945 V 50 055 V 50 V 50 Hz 50 V AC DC 49 965 V 50 035 V 50 V 1 kHz 50 V AC DC 49 965 V 50 035 V 50 V 20 kHz 50 V AC DC 49 965 V 50 035 V 50 V 50 kHz 50 V AC DC 49 945 V 50 055 V 50 V 100 kHz 50 V AC DC 49 74 V 50 26 V 50 V 300 kHz 50 V AC DC 48 475 V 51 525 V 219 V 30 Hz 300 V DC 218 751 V 219 249 V 219 V 50 Hz 300 V AC DC 218 8305 V 219 1695 V 219 V 1 kHz 300 V AC DC 218 8305 V 219 1695 V 219 V 20 kHz 300 V AC DC 218 8305 V 219 1695 V 219 V 50 kHz 300 V AC DC 218 7429 V 219 2571 V 219 V 100 kHz 300 V AC DC 217 845 V 220 155 V 70 V 300 kHz 300 V AC DC 67 75 V 72 25 V NI 4070 4072 Calibration Procedure 60 ni com 4 Wire Resistance 3 Note Tolerances are provided for 4 wire resistance instead of absolute limits because the limits depend on the actual resistance value output by your calibrator Table 17 NI 4070 4072 4 Wire Resistance Verification Tolerances Calibrator 2 Year Tolerance 24 Hour Tolerance Resistance Range ppm of Range ppm of Range 10 MQ 10 MQ 410 ppm 102 ppm 1 MQ 1 MQ 100 ppm 22 ppm 100 kQ 100 kQ 86 ppm 17 ppm 10 kQ 10 kQ 83 ppm 14 ppm 1kQ 1kQ 83 ppm 14 ppm 100 Q 100 Q 90 ppm 25 ppm 0Q 10 MQ 10 ppm 2 ppm oQ 1 MQ 10 ppm 2 ppm 0Q 100 kQ 6 ppm 2 ppm 0Q 10 kQ 3 ppm 2 ppm 0Q 1kQ 3 ppm 2 ppm 0Q 100 Q 10 ppm 10 ppm 2 Wire Resistance 3 Note Tolerances are provided for 2 wire
32. _VAL_2_WIRE_RES e Range 10e6 Resolution 10 Call niDMM_Read Subtract the previously stored 10 MQ range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 Output 1 MQ on the calibrator without external sense or 2 wire compensation Call niDMM ConfigureMeasurement with the following parameters gt Function NIDMM_VAL_2_WIRE_RES e Range 1e6 Resolution 1 28 ni com 45 46 47 48 49 50 51 52 53 54 33 56 National Instruments Corporation Call niDMM Read Subtract the previously stored 1 MQ range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 Output 100 kQ on the calibrator without external sense or 2 wire compensation Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL 2 WIRE_RES e Range 100e3 e Resolution 0 1 Call niDMM Read Subtract the previously stored 100 kQ range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 Output 10 kQ on the calibrator with 2 wire compensation turned on but with external sense turned off Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES e Range 10e3 e Resolution 0 01 Call niDMM_Read Subtract the previously stored 10 kQ range offset from this measurement Verify
33. ables and fixtures should be consistent throughout each measurement If you are using cables to connect the verification capacitors to the NI 4072 banana plug connectors minimize noise by ensuring that the cables remain fixed and do not move during the measurement Keep direct contact with the verification capacitors to a minimum so that they are constantly kept at the ambient temperature After connecting a capacitor to the NI 4072 terminals NI recommends waiting 30 seconds for the capacitor temperature to stabilize Note You should know the total capacitance up to the banana connectors that plug into the NI 4072 before performing the verification procedure National Instruments Corporation 37 NI 4070 4072 Calibration Procedure To verify the capacitance measurements of the NI 4072 complete the following steps 1 2 de Disconnect any fixtures or cables from the NI 4072 Call niDMM reset to reset the NI 4070 4072 to a known state Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL CAPACITANCE e Range 300e 12 Resolution 50e 15 Set the number of averages of the NI 4072 to 20 by calling niDMM SetAttributeViInt32 with the following parameters e Attribute_ID NIDMM ATTR LC NUMBER MEAS TO AVERAGE Attribute_Value 20 RG Note This measurement corresponds to a 0 pF capacitance Call niDMM_Read Verify that this measurement falls between the tolerances l
34. alibration National Instruments Corporation Ensure that the PXI chassis fan speed is set to HI if calibrating the NI PXI 4070 4072 and that the fan filters are clean Use PXI filler panels in all vacant slots to allow proper cooling Plug the PXI chassis or PC and the calibrator into the same power strip to avoid ground loops Power on and warm up both the calibrator and the NI 4070 4072 for at least 60 minutes before beginning this calibration procedure Maintain an ambient temperature of 23 1 C Maintain an ambient relative humidity of less than 60 Allow the calibrator to settle fully before taking any measurements Consult the Fluke 5700A 5720A user documentation for instructions Allow the thermal EMF enough time to stabilize when you change connections to the calibrator or the NI 4070 4072 The suggested time periods are stated where necessary throughout this document Keep a shorting bar connected between the V GUARD and GROUND binding posts of the calibrator at all times 5 NI 4070 4072 Calibration Procedure e Clean any oxidation from the banana plugs on the Fluke 5440 cables before plugging them into the binding posts of the calibrator or the banana plug connectors of the NI 4070 4072 Oxidation tarnishes the copper banana plugs so that they appear dull rather than shiny and leads to greater thermal EMF e Keep the blue banana plugs on the Fluke 5440 cables connected to the V GUARD binding post of the calibra
35. alibrator Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_CURRENT e Range 1 Resolution 1e 6 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 19 Output 1 A on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 You have completed verifying the DC current of the NI 4070 4072 Select one of the following options NI 4070 4072 Calibration Procedure If you want to continue verifying other modes go to the Verifying AC Current section If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session 32 ni com Verifying AC Current To verify the AC current of the NI 4070 4072 complete the following steps 1 2 National Instruments Corporation Reset the calibrator Fasten the connectors on one end of the Fluke 5440 cable to the NI 4070 4072 HI SENSE and LO banana plug connectors and fasten the connectors on the other end of the cable to the HI and LO calibrator binding posts Figure 3 shows the correct connections Table 9 lists the cable connections Call niDMM_reset to reset the NI 4070 4072 to a known state Call niDMM_ConfigureMeasure
36. alues listed in Table 10 verify that each measurement falls between the tolerances listed in Table 22 The tolerances shown in Table 22 correspond to the NI 4072 accuracy specifications 14 Remove the 270 pF verification capacitor and plug the 1 nF verification capacitor into the AT and LO banana plug connectors of the NI 4072 15 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL CAPACITANCE e Range 1e 9 e Resolution 100e 15 16 Set the number of averages of the NI 4072 to 20 by calling niDMM SetAttributeViInt32 with the following parameters e o Attribute ID NIDMM ATTR LC NUMBER MEAS TO AVERAGE Attribute Value 20 3 Note If you use capacitance verification values that differ from the values listed in Table 10 verify that each measurement falls between the tolerances listed in Table 22 The tolerances shown in Table 22 correspond to the NI 4072 accuracy specifications 17 Call niDMM Read Verify that this measurement falls between the tolerances listed in Table 22 18 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_CAPACITANCE e Range 10e 9 e Resolution 1e 12 National Instruments Corporation 39 NI 4070 4072 Calibration Procedure 19 Set the number of averages of the NI 4072 to 20 by calling niDMM SetAttributeViInt32 with the following parameters o Attribute ID NIDMM ATTR LC NUMBER MEAS TO
37. device e Ifyou are not performing additional adjustments refer to one of the following sections Verification Procedures to verify your new calibration coefficients before saving them to the EEPROM Completing the Adjustment Procedures if you do not want to verify the adjustments you have just made Adjusting Current Modes If you do not use the current modes DC and AC or the accuracy is insignificant for your application you can skip this section and select one of the following options e If you skip this section and you are calibrating an NI 4072 go to the Adjusting Capacitance and Inductance NI 4072 Only section O National Instruments Corporation 53 NI 4070 4072 Calibration Procedure If you skip this section and you want to verify the new calibration coefficients before saving them to the EEPROM repeat the Verification Procedures section except for Initial Setup If you skip this section and you do not want to verify the new calibration coefficients go to the Completing the Adjustment Procedures section To adjust the current modes of the NI 4070 4072 complete the following steps 1 Reset the calibrator 2 Fasten the connectors on one end of the Fluke 5440 cable to the NI 4070 4072 HI SENSE and LO banana plug connectors and fasten the connectors on the other end of the cable to the HI and LO calibrator binding posts Figure 3 shows the correct connections Table 9 lists the cable connec
38. e 1 the floating point value is 1 0 The parameters Trigger Count Sample Count Array Size and ParamValue have integer values Refer to the NI Digital Multimeters Help for more information about parameter values 3 Note Many of the parameter values listed in this document are expressed in scientific notation Some programming languages do not support the direct entry of numbers in this format Be sure to properly enter these values with the appropriate number of zeros For example enter the scientific notation number 10e 6 as 0 00001 and the number 100e3 as 100000 If your programming language supports scientific notation NI recommends that you use this feature to minimize possible data entry errors National Instruments Corporation 7 NI 4070 4072 Calibration Procedure Verifying DC Voltage To verify DC voltage of the NI 4070 4072 complete the follovving steps 1 10 11 NI 4070 4072 Calibration Procedure Plug in the insulated banana plug shorting bar across the HI and LO banana plug connectors on the NI 4070 4072 Wait one minute for the thermal EMF to stabilize Call niDMM_reset Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM VAL DC VOLTS e Range 1 e Resolution 1e 6 Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE e o Attribute
39. e gpctrNum ND COUNTER 0 e paramID ND COUNT 2 e paramValue 10e6 Call GPCTR Control with the following parameters e deviceNumber the device number of the NI 6608 assigned by MAX e gpetrNum ND_COUNTER_0 action ND PROGRAM Call niDMM Read Verify that this measurement falls between the limits listed in Table 21 Call GPCTR Control with the following parameters e deviceNumber the device number of the NI 6608 assigned by MAX e gpctrNum ND COUNTER 0 e action ND RESET Repeat steps 10 through 15 with the following modification in steps 11 and 12 change paramValue to 500 when you call the function GPCTR_Change_Parameter Repeat steps 10 through 15 with the following modification in steps 11 and 12 change paramValue to 20 when you call the function GPCTR_Change_Parameter You have completed verifying the frequency of the NI 4070 4072 Select one of the following options NI 4070 4072 Calibration Procedure If you are calibrating an NI 4072 and want to continue verifying other modes go to the Verifying Capacitance and Inductance NI 4072 Only section If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session 36 ni com Verifying Capacitance a
40. e following parameters bl Function NIDMM_VAL_DC_CURRENT e Range 0 2 e Resolution 200e 9 Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC CURRENT e Range 1 e Resolution 1e 6 Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_CURRENT e Range 0 02 Resolution 20e 9 Call niDMM Read to configure the NI 4070 4072 for a current mode before applying current 31 NI 4070 4072 Calibration Procedure 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Output 20 mA on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Output 20 mA on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Output 200 mA on the calibrator Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_DC_CURRENT e Range 0 2 Resolution 200e 9 Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Output 200 mA on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Output 1 A on the c
41. enyengisensdtesst tari 58 AC Volare critic drets 59 4 Wire RESIST NCE disc iii imat dia atenta cues dada codiciada ds 61 DW ire Resistance unas st 61 A rere rerrrrr rec rtre reer corer cere eee eee rte 62 ACCUM nispera tease savas oia ec ORAE Er 62 FREQUENCY sis iaia eiii 63 Capacitance and InductanCe ooooconncnonnnonconnnonconcnnnonn nono cononn nro ncnncrnnonos 63 Appendix A Calibration Options oooocncnnncnncnnoniononancnnconncancononanona non ccnnonnos 64 Where to Go for SUppOrt eee ee eeeeseceeceseeseeeseeseeeseeaeenseeaeseeeeaeenaes 68 7 NATIONAL P INSTRUMENTS Conventions gt bold italic monospace The following conventions are used in this document The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box The symbol indicates that the following text applies only to a specific product a specific operating system or a specific software version This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on a product refer to the Read Me First Safety and Radio Frequency Interference document included with the device for information about precautions to take Bold
42. etAttributeViReal64 with the following parameters e Attribute_ID NIDMM ATTR INPUT RESISTANCE o Attribute Value NIDMM VAL 10 MEGAOHM Call niDMM ConfigureMultiPoint with the following parameters e Trigger Count 1 e Sample Count 10 e Sample Trigger NIDMM_VAL_IMMEDIATE e SampleInterval 1 Call niDMM ReadMultiPoint with the following parameters e Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 10 Average the results by summing the returned reading array of the function and dividing by the returned actual number of points Store the result as the 100 mV 10 MQ mode offset Output 100 mV on the calibrator with the range locked to 2 2 V This range prevents a 50 calibrator output resistance from creating a voltage divider with the internal resistance of the NI 4070 4072 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 0 1 e Resolution 100e 9 11 NI 4070 4072 Calibration Procedure 34 35 36 37 38 39 40 41 42 43 44 NI 4070 4072 Calibration Procedure Set the input resistance of the NI 4070 4072 to 510 GQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE o Attribute Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Subtract the previously stored 100 mV gt 10 GQ mode offset from this measurement and veri
43. fy that the result falls between the limits listed in Table 15 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Subtract the previously stored 100 mV 10 MQ mode offset from this measurement and verify that the result falls between the limits listed in Table 15 Output 100 mV on the calibrator with the range locked to 2 2 V This range prevents a 50 Q calibrator output resistance from creating a voltage divider with the internal resistance of the NI 4070 4072 Set the input resistance of the NI 4070 4072 to gt 10 GQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE o Attribute Value NIDMM VAL GREATER THAN 10 GIGAOHM Call niDMM Read Subtract the previously stored 100 mV gt 10 GQ mode offset from this measurement and verify that the result falls between the limits listed in Table 15 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute Value NIDMM VAL 10 MEGAOHM Call niDMM Read Subtract the previously stored 100 mV 10 MQ mode offset from this measurement and verify that the result falls between the limits listed in Table
44. fy that this measurement falls between the limits listed in Table 16 7 CallniDMM ConfigureMeasurement with the following parameters s Function NIDMM_VAL_AC_VOLTS_DCCOUPLED e Range 0 05 Resolution 50e 9 8 Call niDMM Read Verify that this measurement falls between the limits listed in Table 16 9 Output 50 mV at 30 Hz on the calibrator 10 Call niDMM ConfigureMeasurement with the following parameters s Function NIDMM_VAL_AC_VOLTS_DCCOUPLED e Range 0 05 Resolution 50e 9 11 Call niDMM Read Verify that this measurement falls between the limits listed in Table 16 12 Refer to Table 2 for the appropriate calibrator outputs and parameter values as you complete the following steps a On the calibrator output the value listed in the Calibrator Output column in Table 2 for the current iteration b Call niDMM_ConfigureMeasurement with Mode set to NIDMM_VAL_AC_VOLTS and the remaining parameters as shown in Table 2 for the current iteration c CallniDMM_Read Verify that this measurement falls between the limits listed in Table 16 d CallniDMM ConfigureMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 NI 4070 4072 Calibration Procedure 16 ni com 13 Repeat step 12 for each of the remaining iterations shown in Table 2 Table 2 niDMM_ConfigureMeasurement Parameters
45. g posts Figure 1 shows the correct connections Table 1 lists the cable connections Wait two minutes for the thermal EMF to stabilize if the Fluke 5440 cable was not previously used in this configuration Output 0 Q on the calibrator with 2 wire compensation turned on but with external sense turned off Call niDMM_reset to reset the NI 4070 4072 to a known state 25 NI 4070 4072 Calibration Procedure 19 20 21 22 23 24 25 26 27 NI 4070 4072 Calibration Procedure Call niDMM ConfigureMeasurement with the following parameters Function NIDMM VAL 2 NIRE RES e Range 100e6 Resolution 100 Call niDMM_Read and store the result as the 100 MQ range offset Call niDMM ConfigureMeasurement with the following parameters o Function NIDMM_VAL_2_WIRE_RES e Range 10e6 e Resolution 10 Call niDMM_Read and store the result as the 10 MQ range offset Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES e Range 1e6 e Resolution 1 Call niDMM_Read and store the result as the 1 MQ range offset Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL 2 VIRE RES e Range 100e3 e Resolution 0 1 Call niDMM ConfigureMultiPoint with the following parameters Trigger Count 1 Sample Count 4 e Sample Trigger NIDMM VAL IMMEDIATE Sample Interval 1 Call niDMM ReadMulti
46. he Completing the Adjustment Procedures section Completing the Adjustment Procedures To complete the adjustment procedure for the NI 4070 4072 and close the DMM CloseExtCal with the following parameter session call nil e Action NIDMM_EXTCAL_ACTION_SAVE if the results of the calibration were satisfactory and you want to save the new calibration coefficients to the EEPROM Otherwise e Action NIDMM_EXTCAL_ACTION_ABORT if the results of the calibration were unsatisfactory and you want to restore the original calibration coefficients to the EEPROM Verification Limits This section includes the verification limits for DC voltage AC voltage 4 wire resistance 2 wire resistance DC current AC current and frequency for the NI 4070 4072 and the verification tolerances for capacitance on the NI 4072 Compare these limits to the results you obtain in the Verification Procedures section Note Use the values in the 24 Hour Limits column for a post adjustment verification only Otherwise use the values in the 2 Year Limits column Limits in the following tables are based upon the February 2007 edition of the NI 4070 4072 Specifications Refer to the most recent NI 4070 4072 specifications online at ni com manuals If a more recent edition of the specifications is available recalculate the limits based upon the latest specifications DC Voltage Table 15 NI 4070 4072 DC Voltage Verification Limits
47. he DC current of the NI 4070 4072 complete the following steps 1 2 Reset the calibrator Fasten the connectors on one end of the Fluke 5440 cable to the NI 4070 4072 HI SENSE and LO banana plug connectors and connect the connectors on the other end of the cable to the HI and LO calibrator binding posts Figure 3 shovvs the correct connections Table 9 lists the cable connections 8 O NATIONAL INSTRUMENTS 6 6 Digit FlexDMM 300V SENSE G MAX Waw OUTPUT SENSE Va va Lo GUARD GROUND 1 NI 4070 4072 2 Fluke 5700A 5720A Calibrator 3 Fluke 5440 Cable NI 4070 4072 Calibration Procedure Figure 3 Cable Connections for Current 30 ni com Table 9 Fluke 5440 Cable Connections Banana Plug Connector Banana Plug Color Binding Post NI 4070 4072 Fluke 5440 Cable Fluke 5700A 5720A Calibrator HI SENSE Red OUTPUT HI LO Black OUTPUT LO No connection Blue V GUARD 10 11 12 National Instruments Corporation Call niDMM_reset to reset the NI 4070 4072 to a known state Set the current output on the calibrator to NORM and output 0 A Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_CURRENT e Range 0 02 Resolution 20e 9 Call niDMM Read Verify that this measurement falls between the limits listed in Table 19 Call niDMM ConfigureMeasurement with th
48. ibrator Plug in the insulated shorting bar across the HI and LO banana plug connectors of the NI 4070 4072 Wait two minutes for the thermal EMF to stabilize Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM_VAL_2 WIRE_RES e Range 10e6 Input Resistance NIDMM_VAL_RESISTANCE_NA 46 ni com 58 59 60 61 62 63 You have completed adjusting the DC voltage and resistance modes of the Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 2 WIRE RES e Range 1e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 2 WIRE RES e Range 100e3 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM_VAL_2 WIRE RES e Range 10e3 Input Resistance NIDMM_VAL_RESISTANCE_NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 2 WIRE_RES e Range 1e3 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM VAL 2 WIRE RES e Range 100 Input Resistance NIDMM VAL RESISTANCE NA Call niDMM CalAdjustMisc with Type set to NIDMM EXTCAL MISCCAL SECTION NI 4070 4072 Select one of the following options Caution For the NI 4072 adjusting the capacitance and inductance is required Skip
49. ibrator Output 2 Year Limits Amplitude Frequency Range Coupling Lower Upper 5 mV 1 kHz 50 mV AC DC 0 0049775 V 0 0050225 V 50 mV 30 Hz 50 mV DC 0 04993 V 0 05007 V 50 mV 50 Hz 50 mV AC DC 0 049955 V 0 050045 V 50 mV 1 kHz 50 mV AC DC 0 049955 V 0 050045 V 50 mV 1 kHz 500 mV AC DC 0 049875 V 0 050125 V 50 mV 20 kHz 50 mV AC DC 0 049955 V 0 050045 V 50 mV 50 kHz 50 mV AC DC 0 049935 V 0 050065 V 50 mV 100 kHz 50 mV AC DC 0 04971 V 0 05029 V 50 mV 300 kHz 50 mV AC DC 0 04845 V 0 05155 V 500 mV 30 Hz 500 mV DC 0 49945 V 0 50055 V 500 mV 50 Hz 500 mV AC DC 0 49965 V 0 50035 V 500 mV 1 kHz 500 mV AC DC 0 49965 V 0 50035 V 500 mV 1 kHz 5V AC DC 0 49875 V 0 50125 V 500 mV 20 kHz 500 mV AC DC 0 49965 V 0 50035 V 500 mV 50 kHz 500 mV AC DC 0 49945 V 0 50055 V National Instruments Corporation 59 NI 4070 4072 Calibration Procedure Table 16 NI 4070 4072 AC Voltage Verification Limits Continued Calibrator Output 2 Year Limits Amplitude Frequency Range Coupling Lower Upper 500 mV 100 kHz 500 mV AC DC 0 4974 V 0 5026 V 500 mV 300 kHz 500 mV AC DC 0 48475 V 0 51525 V 5V 30 Hz 5V DC 4 9945 V 5 0055 V 5V 50 Hz 5V AC DC 4 9965 V 5 0035 V 5V 1 kHz 5V AC DC 4 9965 V 5 0035 V 5V 1 kHz 50 V AC DC 4 9875 V 5 0125 V 5V 1 kHz 300 V AC DC 4 9375 V 5 0625 V 5V 20 kHz 5V AC DC 4 9965 V 5 0035 V 5V 50 kHz 5V AC DC 4 9945 V 5 0055 V 5V 100 kHz 5V AC DC 4 974
50. ing other modes go to the Verifying Frequency section If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session Verifying Frequency nye Notes The frequency of the NI 4070 4072 is not user adjustable If this verification procedure indicates that the frequency is out of specification return the NI 4070 4072 to NI for repair This verification procedure is optional and requires additional test equipment If you do not want to verify frequency select one of the following options NI 4070 4072 Calibration Procedure If you are calibrating an NI 4072 and want to continue verifying other modes go to the Verifying Capacitance and Inductance NI 4072 Only section If you do not want to verify other modes and are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session 34 ni com To verify the frequency of the NI 4070 4072 complete the follovving steps 1 Remove all connections from the NI 4070 4072 3 Note Polarity is not important in steps 2 3 and 5 2 National Instruments Corporation Connect
51. isted in Table 22 Plug in the insulated banana plug shorting bar across the HI and LO banana plug connectors of the NI 4072 Call niDMM ConfigureMeasurement with the following parameters s Function NIDMM VAL INDUCTANCI El e Range 10e 6 Resolution 1e 9 Set the number of averages of the NI 4072 to 40 by calling niDMM SetAttributeViInt32 with the following parameters e Attribute_ID NIDMM ATTR LC NUMBER MEAS TO AVERAGE Attribute Value 40 3 Note This measurement corresponds to a O uH inductance 9 10 NI 4070 4072 Calibration Procedure Call niDMM Read Verify that this measurement falls between the tolerances listed in Table 22 Remove the shorting bar and plug the 270 pF verification capacitor into the HI and LO banana plug connectors of the NI 4072 Remember to wait 30 seconds for the temperature to stabilize before performing the next step 38 ni com 11 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_CAPACITANCE e Range 300e 12 e Resolution 50e 15 12 Set the number of averages of the NI 4072 to 20 by calling niDMM_SetAttributeViInt32 with the following parameters e Attribute_ID NIDMM ATTR LC NUMBER MEAS TO AVERAGE e Attribute_Value 20 13 Call niDMM Read Verify that this measurement falls betvveen the tolerances listed in Table 22 3 Note If you use capacitance verification values that differ from the v
52. ited Kingdom 44 0 1635 523545 National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents 2003 2007 National Instruments Corporation All rights reserved 370532F 01 Apr07
53. limits listed in Table 15 Output 300 V on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Reset the calibrator for safety reasons You have completed verifying the DC voltage of the NI 4070 4072 Select one of the following options If you want to continue verifying other modes go to the Verifying AC Voltage section If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session Verifying AC Voltage To verify AC voltage of the NI 4070 4072 complete the following steps 1 2 National Instruments Corporation Reset the calibrator Fasten the connectors on one end of the Fluke 5440 cable to the appropriate banana plug connectors on the NI 4070 4072 and fasten the connectors on the other end of the cable to the appropriate calibrator binding posts Figure 1 shows the correct connections Table 1 lists the cable connections Output 5 mV at kHz on the calibrator Call niDMM_reset to reset the NI 4070 4072 to a known state 15 NI 4070 4072 Calibration Procedure 5 CallniDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL AC VOLTS e Range 0 05 Resolution 50e 9 6 CallniDMM Read Veri
54. ment with the following parameters Function NIDMM_VAL_AC_CURRENT e Range 0 01 e Resolution 10e 9 Call niDMM Read to configure the NI 4070 4072 for a current mode before applying current Output 1 mA at kHz on the calibrator with the current output set to NORM Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 Output 10 mA at 1 kHz on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 Call niDMM_ConfigureMeasurement with the following parameters s Function NIDMM_VAL_AC_CURRENT e Range 0 1 e Resolution 100e 9 Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 Output 100 mA at 1 kHz on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 33 NI 4070 4072 Calibration Procedure 14 15 16 17 Call niDMM ConfigureMeasurement with the following parameters Function NIDMM VAL AC CURRENT e Range 1 Resolution 1e 6 Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 Output 1 A at 1 kHz on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 20 You have completed verifying the AC current of the NI 4070 4072 Select one of the following options If you want to continue verify
55. meters Calibrator niDMM_ConfigureMeasurement Parameters Iteration Output Function Range Resolution OffsetCompOhms 1 10 MQ NIDMM_VAL_4_WIRE_RES 10e6 10 OFF 2 1 MQ NIDMM_VAL_4_WIRE_RES 1e6 1 OFF 3 100 EQ NIDMM VAL 4 VIRE RES 100e3 Ds OFF 4 10 KQ NIDMM VAL 4 VIRE RES 10e3 0 01 ON 5 1kQ NIDMM VAL 4 VIRE RES 1e3 le 3 ON 6 100 Q NIDMM VAL 4 VIRE RES 100 100e 6 ON 7 0Q NIDMM VAL 4 VIRE RES 10e6 10 OFF 8 0Q NIDMM VAL 4 VIRE RES 1e6 di OFF 9 0Q NIDMM_VAL_4 WIRE_RES 100e3 Oise OFF 10 0Q NIDMM VAL 4 VIRE RES 10e3 0 01 ON 11 0Q NIDMM VAL 4 VIRE RES 1e3 le 3 ON 12 0Q NIDMM VAL 4 VIRE RES 100 100e 6 ON NI 4070 4072 Calibration Procedure 24 ni com You have completed verifying the 4 wire resistance of the NI 4070 4072 Select one of the following options e Ifyou want to continue verifying other modes go to the Verifying 2 Wire Resistance section e If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section e If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM close to close the session Verifying 2 Wire Resistance To verify the 2 wire resistance of the NI 4070 4072 complete the following steps 1 Plug in the insulated banana plug shorting bar across the HI and LO banana
56. mpare the measured performance to an external standard of known measurement uncertainty to confirm that the product meets or exceeds specifications Figure 4 shows the procedural flow for verification During adjustment you correct the measurement error of the device by adjusting the calibration constants and storing the new calibration constants in the EEPROM Frequency is the only mode that does not require adjustment Figure 5 shows the procedural flow for adjustment Reverifying all modes after adjustments ensures that the adjustment procedures were performed correctly Normally the calibration sequence is as follows 1 Verify the operation of the NI 4070 4072 using the 2 year accuracy limits or the 90 day accuracy limits if it has been externally calibrated within that time 2 Adjust the NI 4070 4072 3 Reverify the NI 4070 4072 using the 24 hour accuracy limits or the 2 year accuracy limits when the 24 hour limits are not specified Depending on your measurement and accuracy requirements a complete calibration of the NI 4070 4072 may not be necessary A number of options are available that can shorten the calibration time The following adjustment options are available e Complete calibration Performing the entire calibration procedure from beginning to end guarantees that the NI 4070 4072 performs at or above the published specifications for all modes and ranges e Complete calibration with exceptions Omitting
57. mplete the following steps a On the calibrator output the value listed in the Calibrator Output column in Table 11 for the current iteration b CallniDMM CalAdjustGain with Mode set to NIDMM VAL AC VOI in Table 11 for the current iteration c CallniDMM CalAdj NIDMM VAL AC VOI ustGain again changing Mode to LTS DCCOUPLED Table 11 niDMM_CalAdjustGain Parameters LTS Set the remaining parameters as shown Repeat step 3 for each of the remaining iterations listed in Table 11 Calibrator Output niDMM_CalAdjustGain Parameters f Range Expected Iteration Amplitude kHz Mode V Input Resistance Value 1 50 mV 1 NIDMM_VAL_AC_VOLTS 0 05 NIDMM_VAL_1_MEGAOHM 0 05 50 mV 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 NIDMM_VAL_1_MEGAOHM 0 05 2 500 mV 1 NIDMM_VAL_AC_VOLTS 0 5 NIDMM_VAL_1_MEGAOHM 0 5 500 mV 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 5 NIDMM_VAL_1_MEGAOHM 0 5 NI 4070 4072 Calibration Procedure 48 ni com Table 11 niDMM_CalAdjustGain Parameters Continued Calibrator Output niDMM_CalAdjustGain Parameters f Range Expected Iteration Amplitude kHz Mode V Input Resistance Value 3 sv 1 NIDMM VAL AC VOLTS 5 NIDMM VAL 1 MEGAOHM 5 5V 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 NIDMM VAL 1 MEGAOHM 5 4 50V l NIDMM_VAL_AC_VOLTS 50 NIDM
58. nd Inductance NI 4072 Only This verification procedure only applies to the NI 4072 and requires additional test equipment as indicated in the Additional Requirements for the NI 4072 section Sy Note The NI 4072 inductance accuracy is theoretically verified if the capacitance accuracy meets the specifications If you have access to precision inductors you can verify the inductance measurements by comparing your results with the published accuracy specifications NI suggests using traceable capacitor standards with low thermal drift You can use different verification capacitors to verify each capacitance range You can verify two ranges with the same verification capacitor as long as its value is 21090 of the higher capacitor range For example you can use a 1 nF verification capacitor to test both the 10 nF and 1 nF ranges After taking each measurement verify that the measurement falls between the tolerances listed in Table 22 Tolerances are provided instead of absolute limits because you can use capacitance verification values other than the values suggested or the calibrated value may differ slightly from the nominal capacitance for example 272 43 pF instead of 270 00 pF The tolerances shown in Table 22 correspond to the NI 4072 accuracy specifications The following verification procedure assumes the use of verification capacitors with the following values 270 pF 1 nF 100 nF 10 uF and 1000 uF The configuration of the c
59. o at least four times the accuracy of the NI 4072 with temperature coefficients lt 250 ppm C The values of the verification capacitors should cover the complete capacitance range NI suggests using traceable capacitor standards with values 210 of full range for all ranges except the 300 pF range For the NI 4070 4072 Calibration Procedure 4 ni com 300 pF range a capacitor with values between 90 100 of full scale should be used NI suggests using the capacitance standards of the SCA Series from IET Labs This calibration procedure assumes the use of 270 pF 1 nF 100 nF 10 uF and 1000 uF standards If you are using cables to connect the verification capacitors to the NI 4072 banana plug connectors NI recommends using Pasternack PE3005 banana to banana coaxial cables with length lt 4 inches and total capacitance lt 40 pF Before performing the verification procedure you should know the total capacitance up to the end of the banana connectors that plug into the NI 4072 Optional Test Equipment The following equipment is optional for calibrating the NI 4070 4072 and is only used for frequency verification Test Conditions NI PXI 6608 timing and digital I O module National Instruments SH68 68 D1 shielded cable National Instruments TB 2715 terminal block Pomona MDP 4892 double banana plug with strain relief Coaxial cable for example RG178 Follow these guidelines to optimize the connections and the environment during c
60. onnect any fixtures or cables from the NI 4072 Call niDMM_CalAdjustLc with Type set to NIDMM_EXTCAL_LC_OPEN Plug in the insulated banana plug shorting bar across the HI and LO banana plug connectors of the NI 4072 Call niDMM_CalAdjustLc with Type set to NIDMM_EXTCAL_LC_SHORT Remove the shorting bar and plug the 25 Q resistor across the HI and LO banana plug connectors of the NI 4072 The leads between the resistor and the NI 4072 terminals should be lt 1 in Wait 30 seconds for the thermal EMF to stabilize Call niDMM_CalAdjustLc with Type set to NIDMM_EXTCAL_LC_250HM Remove the resistor and plug in across the HI and LO banana plug connectors of the NI 4072 the next adjustment resistor according to Table 14 Repeat steps 6 through 8 using the parameters shown in Table 14 for niDMM_CalAdjustLc Table 14 niDMM_CalAdjustLC Parameters niDMM_CalAdjustLC Parameters Value of Resistor Type 125Q NIDMM EXTCAL LC 1ROHM 5kQ NIDMM_EXTCAL_LC_5KOHM 100 kQ NIDMM_EXTCAL_LC_100KOHM You have completed adjusting the capacitance and inductance modes of the NI 4072 Select one of the following options National Instruments Corporation To verify that the NI 4072 is now operating within its specifications go to the Verification Procedures section and complete the appropriate procedures 57 NI 4070 4072 Calibration Procedure e To finish the calibration and close the session go to t
61. ping If you are performing additional adjustments refer to the following sections as applicable Adjusting AC Voltage AC and DC Coupled Modes Adjusting Current Modes Adjusting Capacitance and Inductance NI 4072 Only this step causes an incorrect adjustment of the device National Instruments Corporation 47 NI 4070 4072 Calibration Procedure e Ifyou are not performing additional adjustments refer to one of the follovving sections Verification Procedures to verify your new calibration coefficients before saving them to the EEPROM Completing the Adjustment Procedures if you do not want to verify the adjustments you have just made Adjusting AC Voltage AC and DC Coupled Modes RG Note If you do not use the AC voltage modes for any measurements or the accuracy of these modes is irrelevant you can skip this section in the calibration procedure and go directly to the Adjusting Current Modes section To adjust the AC voltage of the NI 4070 4072 complete the following steps 1 Reset the calibrator 2 Fasten the connectors on one end of the Fluke 5440 cable into the appropriate banana plug connectors on the NI 4070 4072 and fasten the connectors on the other end of the cable to the appropriate calibrator binding posts Figure 1 shows the correct connections Table 1 lists the cable connections 3 Refer to Table 11 for the appropriate calibrator output and parameter values as you co
62. plug connectors on the NI 4070 4072 2 Wait one minute for the thermal EMF to stabilize Call niDMM_reset 10 11 12 13 14 15 16 17 18 National Instruments Corporation Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_2_WIRE_RES e Range 10e3 e Resolution 0 01 Call niDMM_ConfigureOffsetCompOhms with OffsetCompOhms set to NIDMM VAL OFFSET COMP OHMS ON Call niDMM Read Verify that this measurement falls between the limits listed in Table 18 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL 2 IIRE RES e Range 1e3 e Resolution 1e 3 Call niDMM_ConfigureOffsetCompOhms with OffsetCompOhms set to NIDMM VAL OFFSET COMP OHMS ON Call niDMM Read Verify that this measurement falls between the limits listed in Table 18 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL 2 VIRE RES e Range 100 e Resolution 100e 6 Call niDMM_ConfigureOffsetCompOhms with OffsetCompOhms set to NIDMM VAL OFFSET COMP OHMS ON Call niDMM Read Verify that this measurement falls between the limits listed in Table 18 Remove the shorting bar from the NI 4070 4072 Reset the calibrator Fasten the connectors on one end of the Fluke 5440 cable to the NI 4070 4072 and fasten the connectors on the other end of the cable to the appropriate calibrator bindin
63. ration b Call niDMM_ConfigureMeasurement with Mode set to NIDMM VAL AC VOLTS and the remaining parameters as shown in Table 3 for the current iteration 17 NI 4070 4072 Calibration Procedure c CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 d CallniDMM ConfigureMeasurement again changing Mode to NIDMM VAL AC VOLTS DCCOUPLED e CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 Table 3 niDMM ConfigureMeasurement Parameters Calibrator Output niDMM ConfigureMeasurement Parameters Iteration Amplitude Frequency Function Range Resolution 1 500 mV 50 Hz NIDMM_VAL_AC_VOLTS 0 5 500e 9 500 mV 50 Hz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 5 500e 9 2 500 mV 1 kHz NIDMM_VAL_AC_VOLTS 0 5 500e 9 500 mV 1 kHz NIDMM VAL AC VOLTS DCCOUPLED 0 5 500e 9 3 500 mV 1 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 500 mV 1 kHz NIDMM VAL AC VOLTS DCCOUPLED 5 5e 6 4 500 mV 20 kHz NIDMM VAL AC VOLTS 0 5 500e 9 500 mV 20 kHz NIDMM VAL AC VOLTS DCCOUPLED 0 5 500e 9 5 500 mV 50 kHz NIDMM VAL AC VOLTS 0 5 500e 9 500 mV 50 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 5 500e 9 6 500 mV 100kHz NIDMM VAL AC VOLTS 0 5 500e 9 500 mV 100kHz NIDMM VAL AC VOLTS DCCOUPLED 0 5 500e 9 7 500 mV 300 kHz NIDMM VAL AC VOLTS 0 5 500e 9 500 mV 300 kHz NIDMM VAL AC VOLTS DCCOUPLED 0 5 500e 9 18 Output 5 V at 3
64. rator output the value listed in the Calibrator Output column in Table 13 for the current iteration Call niDMM CalAdjustACFilter with Mode set to NIDMM_VAL_AC_VOLTS and the remaining parameters as shown in Table 13 for the current iteration Note The Session parameter remains the same for all instances of this function C Call niDMM CalAdjustACFilter again changing Mode to NIDMM VAL AC VOLTS DCCOUPLI ED 8 Repeat step 7 for each of the remaining iterations shovvn in Table 13 Table 13 niDMM_CalAdjustACFilter Parameters Calibrator Output niDMM_CalAdjustACFilter Parameters Frequency Range Frequency Iteration Amplitude kHz Mode V Hz 1 50 mV 1 NIDMM VAL AC VOLTS 0 05 1e3 50 mV 1 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 1e3 2 50 mV 5 NIDMM_VAL_AC_VOLTS 0 05 5e3 50 mV 5 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 5e3 3 50 mV 20 NIDMM_VAL_AC_VOLTS 0 05 20e3 50 mV 20 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 20e3 4 50 mV 50 NIDMM_VAL_AC_VOLTS 0 05 50e3 50 mV 50 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 50e3 3 50 mV 100 NIDMM VAL AC VOLTS 0 05 100e3 50 mV 100 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 100e3 6 50 mV 200 NIDMM VAL AC VOLTS 0 05 200e3 50 mV 200 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 200e3 7 50 mV 300 NIDMM_VAL_AC_VOLTS 0 05 300e3 50 mV 300 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0 05 300e3 8 50 mV 500 NIDMM_VAL_AC_VOLTS 0 05 500e3 5
65. reMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e CallniDMM Read Verify that this measurement falls between the limits listed in Table 16 Table 5 niDMM_ConfigureMeasurement Parameters Calibrator Output niDMM_ConfigureMeasurement Parameters Iteration Amplitude Frequency Function Range Resolution 1 50V 50 Hz NIDMM_VAL_AC_VOLTS 50 50e 6 50V 50 Hz NIDMM VAL AC VOLTS DCCOUPLED 50 50e 6 2 50V 1 kHz NIDMM_VAL_AC_VOLTS 50 50e 6 50V 1 kHz NIDMM VAL AC VOLTS DCCOUPLED 50 50e 6 3 50 V 20 kHz NIDMM VAL AC VOLTS 50 50e 6 50V 20 kHz NIDMM VAL AC VOLTS DCCOUPLED 50 50e 6 4 50V 50 kHz NIDMM_VAL_AC_VOLTS 50 50e 6 50V 50 kHz NIDMM VAL AC VOLTS DCCOUPLED 50 50e 6 5 50V 100kHz NIDMM_VAL_AC_VOLTS 50 50e 6 50V 100kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 50 50e 6 6 50V 300 kHz NIDMM VAL AC VOLTS 50 50e 6 50V 300 kHz NIDMM VAL AC VOLTS DCCOUPLED 50 50e 6 NI 4070 4072 Calibration Procedure 20 ni com 26 27 28 29 30 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_AC_VOLTS_DCCOUPLED e Range 300 e Resolution 300e 6 Call niDMM_Read The DMM must be in the 300 V range before you apply the voltage Output 219 V at 30 Hz on the calibrator Call niDMM Read Verify that this measurement falls between the limits listed in Table 16 Refer to Table 6 for the appropriate calibrator outputs and parameter values as you complete the following steps a On the calibrator output
66. returned reading array of the function and dividing by the returned actual number of points Store the result as the 1 kQ range offset Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_2_WIRE_RES e Range 100 e Resolution 100e 6 27 NI 4070 4072 Calibration Procedure 35 36 37 38 39 40 41 42 43 44 NI 4070 4072 Calibration Procedure Call niDMM ConfigureMultiPoint with the following parameters Trigger Count 1 Sample Count 10 e Sample Trigger NIDMM VAL IMMEDIATE e Sample Interval 1 Call niDMM ReadMultiPoint with the following parameters e Maximum Time NIDMM VAL TIME LIMIT AUTO e Array Size 10 Average the results by summing the returned reading array of the function and dividing by the returned actual number of points Store the result as the 100 82 range offset Output 100 MQ on the calibrator without external sense or 2 wire compensation Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM_VAL_2_WIRE_RES e Range 100e6 Resolution 100 Call niDMM_Read Subtract the previously stored 100 MQ range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 Output 10 MQ on the calibrator without external sense or 2 wire compensation Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM
67. t the calibrator has been calibrated within the time limits specified in the Required Test Equipment section and that DC zeros calibration has been performed within the last 30 days Consult the NI 4070 4072 Calibration Procedure 6 ni com Fluke 5700A 5720A user documentation for instructions on calibrating these devices RS Note Ensure that both the calibrator and the NI 4070 4072 installed in a povvered on PXI chassis or PC are vvarmed up for at least 60 minutes before you begin this procedure 3 CallniDMM init with the resource name of the device to create a session 3 Note You use this session in all subsequent function calls throughout the verification procedures For more information on using niDMM init refer to the NI Digital Multimeters Help 4 CallniDMM SelfCal This step is optional if you have adjusted the NI 4070 4072 vvithin the last 24 hours and the temperature has remained constant to within 1 C of the calibration temperature Tea Verification Procedures You can use the verification procedures described in this section for both pre adjustment and post adjustment verification The steps of each verification procedure must be performed in the order listed however you can omit entire sections for example the entire Verifying AC Current section if necessary The parameters Range Resolution and Sample Interval used in function calls throughout this section have floating point values For example if Rang
68. text denotes items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names Ttalic text denotes variables emphasis a cross reference hardware labels or an introduction to a key concept Italic text also denotes text that is a placeholder for a word or value that you must supply Text in this font denotes text or characters that you should enter from the keyboard sections of code programming examples and syntax examples This font is also used for the proper names of disk drives paths directories programs subprograms subroutines device names functions operations variables filenames and extensions Software Requirements NI DMM supports a number of programming languages including LabVIEW LabWindows CVI Microsoft Visual C and Microsoft Visual Basic When you install NI DMM you need to install support for only the language you intend to use to write your calibration utility RG Note NI DMM version 2 1 or later supports NI PXI 4070 calibration NI DMM version 2 2 or later supports NI PCI 4070 calibration and NI DMM version 2 3 or later supports NI 4072 calibration NI 4070 4072 Calibration Procedure 2 ni com The procedures in this document are described using C function calls You also can program in LabVIEW using the VIs that correspond to the C function calls Documentation Requirements In addition to this calibration document yo
69. that the result falls between the tolerances listed in Table 18 Output 1 kQ on the calibrator with 2 wire compensation turned on but with external sense turned off Call niDMM ConfigureMeasurement with the following parameters s Function NIDMM_VAL_2_WIRE_RES e Range 1e3 e Resolution 1e 3 Call niDMM Read Subtract the previously stored 1 KQ range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 Output 100 Q on the calibrator with 2 wire compensation turned on but with external sense turned off Call niDMM ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES e Range 100 e Resolution 100e 6 29 NI 4070 4072 Calibration Procedure 57 CallniDMM Read Subtract the previously calculated 100 Q range offset from this measurement Verify that the result falls between the tolerances listed in Table 18 You have completed verifying the 2 wire resistance of the NI 4070 4072 Select one of the following options If you want to continue verifying other modes go to the Verifying DC Current section If you do not want to verify other modes and you are performing a post adjustment verification go to the Completing the Adjustment Procedures section If you do not want to verify any additional modes and you are performing a pre adjustment verification call niDMM_close to close the session Verifying DC Current To verify t
70. the Required Test Equipment section and that DC zeros calibration has been performed within the last 30 days Consult the Fluke 5700A 5720A user documentation for instructions on calibrating these devices ayi Note Ensure that the calibrator is warmed up for at least 60 minutes before you begin this procedure 3 Reset the calibrator 4 Ifyou have not already done so allow the NI 4070 4072 to warm up for 60 minutes within a powered on PXI chassis or PC National Instruments Corporation 41 NI 4070 4072 Calibration Procedure Adjusting DC Voltage and Resistance To adjust the DC voltage and resistance of the NI 4070 4072 complete the follovving steps 1 Fasten the connectors on one end of the Fluke 5440 cable to the appropriate banana plug connectors on the NI 4070 4072 and fasten the connectors on the other end of the cable to the appropriate calibrator binding posts Figure 1 shows the correct connections Table 1 lists the cable connections Wait two minutes for the thermal EMF to stabilize if the cable was not previously connected in this configuration Call niDMM InitExtCal with the resource descriptor of the NI 4070 4072 and your valid user password to output a calibration session Cal Session that you can use to perform NI DMM calibration or regular measurement functions RG Note You vvill use Cal Session in all subsequent function calls RG Note The default user password for adjusting the NI 4070 4072 is NI
71. the other end of the cable connected to the calibrator binding posts Plug in the insulated banana plug shorting bar across the HI and LO banana plug connectors of the NI 4070 4072 Wait two minutes for the thermal EMF to stabilize Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM_VAL_DC_VOLTS e Range 10 e Input Resistance NIDMM_VAL_GREATER_THAN_10_GIGAOHM Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_VREF Call niDMM CalAdjustOoffset with the following parameters Mode NIDMM VAL DC VOLTS e Range 0 1 e Input Resistance NIDMM VAL 10 MEGAOHM Remove the shorting bar and plug the Fluke 5440 cable back into the NI 4070 4072 banana plug connectors as shown in Figure 1 Wait one minute for the thermal EMF to stabilize Output 10 MQ from the calibrator without external sense Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL 2 NIRE RES e Range 10e6 Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibrator for 10 MQ 43 NI 4070 4072 Calibration Procedure 23 24 25 26 27 28 29 Output 0 Q from the calibrator without external sense or 2 wire compensation Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL 2 NIRE RES e Range 10e6 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibra
72. tions 3 CallniDMM ConfigureMeasurement with the following parameters Function NIDMM VAL DC CURRENT e Range 0 02 4 CallniDMM Read to configure the NI 4070 4072 for a current mode before applying current Output 20 mA on the calibrator with the current output set to NORM 6 CallniDMM CalAdjustGain with the following parameters e Mode NIDMM VAL DC CURRENT e Range 0 02 Input Resistance NIDMM VAL RESISTANCE NA e Expected Value 0 02 7 Output 20 mA on the calibrator with the current output set to NORM Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL DC CURRENT e Range 0 02 Input Resistance NIDMM VAL RESISTANCE NA Expected Value 0 02 9 Output O A on the calibrator 10 Call nipMM_CalAdjustOffset with the following parameters NI 4070 4072 Calibration Procedure e Mode NIDMM VAL DC CURRENT e Range 0 02 Input Resistance NIDMM VAL RESISTANCE NA 54 ni com 11 12 13 14 15 16 17 18 19 20 21 National Instruments Corporation Call niDMM CalAdjustoffset with the following parameters e Mode NIDMM_VAL_AC_CURRENT e Range 0 01 e Input Resistance NIDMM VAL RESISTANCE NA Output 200 mA on the calibrator Call niDMM_CalAdjustGain with the following parameters Mode NIDMM VAL DC CURRENT e Range 0 2 e Input Resistance NIDMM VAL RESISTANCE NA e Expected Value 0 2 Output 200 mA on the
73. tor at all times e Prevent the cables from moving or vibrating by taping or strapping them to a nonvibrating surface Movement or vibration causes triboelectric effects that can result in measurement errors Calibration Procedures The calibration process includes the following steps 1 Initial Setup Set up the test equipment 2 Verification Procedures Verify the existing operation of the device This step confirms whether the device is operating within its specified range prior to calibration Figure 4 shows the procedural flow for verification 3 Adjustment Procedures Submit the device to NI for a factory calibration to adjust the calibration constants Figure 5 shows the procedural flow for adjustment 4 Reverification Repeat the verification procedure to ensure that the device is operating within its specifications after adjustment These steps are described in more detail in the following sections nye Note In some cases the complete calibration procedure may not be required Refer to Appendix A Calibration Options for more information Initial Setup ays Note This section is necessary for pre adjustment verifications only If you are performing a post adjustment verification skip the setup and go directly to the Verifying DC Voltage section To set up the test equipment complete the following steps 1 Remove all connections from the four input banana plug connectors on the NI 4070 4072 2 Verify tha
74. tor for 0 Q Call niDMM_CalAdjustOffset with the following parameters e Mode NIDMM VAL 2 VIRE RES e Range 10e6 Input Resistance NIDMM VAL RESISTANCE NA Disconnect the Fluke 5440 cable from the NI 4070 4072 Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_ZINT Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_2WIRELEAKAGE On the NI 4070 4072 plug a Pomona B 4 banana cable from the HI input to the HI SENSE input Plug another Pomona B 4 banana cable from the LO input to the LO SENSE input A Caution Make sure that the insulation of these cables does not touch 30 31 32 33 34 35 NI 4070 4072 Calibration Procedure Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_4WIRELEAKAGE Remove the banana cables and plug the two sets of Fluke 5440 cables into the appropriate banana plug connectors on the NI 4070 4072 as shown in Figure 2 for 4 wire resistance Wait two minutes for the thermal EMF to stabilize Output 100 MQ from the calibrator without external sense Call niDMM_CalAdjustGain with the following parameters e Mode NIDMM VAL 2 WIRE_RES e Range 100e6 Input Resistance NIDMM VAL RESISTANCE NA e Expected Value the display on the calibrator for 100 MQ Output 0 Q from the calibrator without external sense or 2 wire compensation 44 ni com 36 37 38 39 40 41 42 43 44 45
75. u may find the following references helpful in writing your calibration utility All of these documents are installed on your computer when you install NI DMM To locate them select Start All Programs National Instruments NI DMM Documentation e NI Digital Multimeters Help e NI Digital Multimeters Getting Started Guide NI recommends referring to the following document online at ni com manuals to ensure that you are using the latest NI 4070 4072 specifications e NI 4070 4072 Specifications You may need the following documents which are available at ni com manuals to perform the optional frequency verification procedure e TB 2715 Terminal Block Installation Guide About Your NI 6608 Device Calibration Function Reference For detailed information about the NI DMM calibration functions used in this procedure refer to the LabVIEW Reference or the C CVI VB Reference sections of the NI Digital Multimeters Help located at Start All Programs National Instruments NI DMM Documentation Password The default calibration password in NI DMM is NI National Instruments Corporation 3 NI 4070 4072 Calibration Procedure Calibration Interval The accuracy requirements of your measurement application determine how often you should calibrate the NI 4070 4072 NI recommends performing a complete calibration at least once every two years NI does not guarantee the absolute accuracy of the NI 4070 4072 beyond this
76. ue V GUARD Second cable HI SENSE Red SENSE HI LO SENSE Black SENSE LO No connection Blue V GUARD 3 Wait two minutes for the thermal EMF to stabilize if the Fluke 5440 cables were not previously connected in this configuration 4 Call niDMM_reset 5 Refer to Table 8 for the appropriate calibrator output and function parameter values as you complete the following steps a On the calibrator output the value listed in the Calibrator Output column in Table 8 for the current iteration Make sure that the external sense is turned on but 2 wire compensation is turned off 3 Note After setting the calibrator output to 0 Q in the seventh iteration you do not need to continually set the calibrator to 0 Q for iterations 8 through 12 b CallniDMM ConfigureMeasurement with the parameters set as shown in Table 8 for the current iteration c CallniDMM ConfigureOffsetCompOhms with OffsetCompOhms set to either NIDMM_VAL_OFFSET_COMP_OHMS_ON Or NIDMM_VAL_OFFSET_COMP_OHMS_OFF according to Table 8 for the current iteration d CallniDMM Read Verify that this measurement falls between the tolerances listed in Table 17 Tolerances are provided instead of absolute limits because your calibrator will have different discrete resistance values National Instruments Corporation 23 NI 4070 4072 Calibration Procedure 6 Repeat step 5 for each of the remaining iterations listed in Table 8 Table 8 niDMM_ConfigureMeasurement Para
77. ut resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM ATTR INPUT RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Output 100 V on the calibrator A Caution Avoid touching the connections when generating a high voltage from the calibrator 66 67 68 69 70 NI 4070 4072 Calibration Procedure Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM VAL DC VOLTS e Range 100 Resolution 100e 6 Set the input resistance of the NI 4070 4072 to 10 MQ by calling niDMM SetAttributeViReal64 with the following parameters e o Attribute ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM VAL 10 MEGAOHM Call niDMM Read Verify that this measurement falls between the limits listed in Table 15 Output 100 V on the calibrator Call niDMM_Read Verify that this measurement falls between the limits listed in Table 15 14 ni com 71 72 73 74 75 76 71 Call niDMM ConfigureMeasurement with the following parameters e Function NIDMM VAL DC VOLTS e Range 300 e Resolution 300e 6 Call niDMM_Read Before you apply the voltage the DMM must be in the 300 V range Output 300 V on the calibrator Call niDMM Read Verify that this measurement falls between the
78. utput 2 Year Limits Amplitude Frequency Range Lower Upper 1mA 1 kHz 10 mA 0 9976 mA 1 0024 mA 10 mA 1 kHz 10 mA 9 994 mA 10 006 mA 10 mA 1 kHz 100 mA 9 976 mA 10 024 mA 100 mA 1 kHz 100 mA 99 94 mA 100 06 mA 100 mA 1 kHz 1A 99 7 mA 100 3 mA 1A 1 kHz 1A 0 9988 A 1 0012 A NI 4070 4072 Calibration Procedure 62 ni com Frequency Table 21 Frequency Limits 2 Year Limits NI 6608 Output Frequency Lower Upper 1 Hz 0 9999 Hz 1 0001 Hz 20 kHz 19 998 kHz 20 002 kHz 500 kHz 499 95 kHz 500 05 kHz Capacitance and Inductance 3 Note Because the actual capacitance verification values can differ from the following values Table 22 provides tolerances that correspond to the NI 4072 accuracy specifications Table 22 NI 4072 Capacitance and Inductance Verification Tolerances 2 Year Tolerances Verification Values Range of Reading of Range 0 pF 300 pF 0 40 5 0 uH 10 uH 0 1 270 pF 300 pF 0 15 0 1 1 nF 1 nF 0 15 0 1 1nF 10 nF 0 15 0 1 100 nF 100 nF 0 15 0 1 100 nF 1 uF 0 18 0 1 10 uF 10 uF 0 18 0 1 10 uF 100 uF 0 18 0 1 1 000 uF 1 000 uF 0 18 0 1 1 000 uF 10 000 uF 0 18 0 1 National Instruments Corporation 63 NI 4070 4072 Calibration Procedure Appendix A Calibration Options The complete calibration process for the NI 4070 4072 consists of verifying adjusting and reverifying a device During verification you co

National Instruments 1/2-Digit User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents