National Instruments FlexDMM PCI-4070 User Manual Download

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CALIBRATION PROCEDURE

NI 4070/4072 6½-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 6½-digit FlexDMM and 1.8 MS/s
isolated digitizer. For more information on calibration, visit

ni.com/

calibration

.

Contents

Conventions ............................................................................................ 2
Software Requirements ........................................................................... 2
Documentation Requirements................................................................. 3

Calibration Function Reference ....................................................... 3

Password ................................................................................................. 3
Calibration Interval ................................................................................. 3
Test Equipment ....................................................................................... 4
Test Conditions ....................................................................................... 5
Calibration Procedures ............................................................................ 6

Initial Setup...................................................................................... 6
Verification Procedures ................................................................... 7
Adjustment Procedures .................................................................... 39

Verification Limits .................................................................................. 58

DC Voltage ...................................................................................... 58
AC Voltage ...................................................................................... 59
4-Wire Resistance ............................................................................ 60
2-Wire Resistance ............................................................................ 61
DC Current....................................................................................... 61
AC Current....................................................................................... 62
Frequency......................................................................................... 62
Capacitance and Inductance............................................................. 63

Appendix A: Calibration Options ........................................................... 64
Where to Go for Support......................................................................... 68

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Summary of Contents for FlexDMM PCI-4070

Page 1: ...tion on calibration visit ni com calibration Contents Conventions 2 Software Requirements 2 Documentation Requirements 3 Calibration Function Reference 3 Password 3 Calibration Interval 3 Test Equipment 4 Test Conditions 5 Calibration Procedures 6 Initial Setup 6 Verification Procedures 7 Adjustment Procedures 39 Verification Limits 58 DC Voltage 58 AC Voltage 59 4 Wire Resistance 60 2 Wire Resist...

Page 2: ... names italic Italic 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 monospace 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 ...

Page 3: ...quency verification procedure TB 2715 Terminal Block Installation Guide Note to Users About Your 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 ...

Page 4: ...LO input banana plug connectors on the NI 4071 Pomona 5145 insulated double banana plug shorting bar Two sets of banana to banana cables with length not to exceed 4 in Two Pomona B 4 banana to banana patch cords cables Double banana plug with binding posts Pomona 5405 Binding Post Insulated low thermal electromotive force EMF spade lugs Two Pomona 2305 lugs Chassis National Instruments PXI chassis...

Page 5: ...rnack PE3005 banana to banana coaxial cables with length 4 inches and total capacitance 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 Test Conditions Follow these guidelines to optimize the connections and the environment during calibration Ensure that the PXI chassis fan speed is set to HI...

Page 6: ...flow for verification 3 Adjustment Procedures Perform an external adjustment of the device that adjusts the calibration constants with respect to standards of known values Figure 6 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 t...

Page 7: ... 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 Range 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...

Page 8: ...e_Value NIDMM_VAL_10_MEGAOHM 8 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 17 9 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_VOLTS Range 10 Resolution 10e 6 10 Set the input resistance of the NI 4070 4072 to 10 GΩ by calling niDMM_SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTA...

Page 9: ...owing parameters Function NIDMM_VAL_DC_VOLTS Range 300 Resolution 300e 6 18 Set the input resistance of the NI 4070 4072 to 10 MΩ by calling niDMM_SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_10_MEGAOHM 19 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 17 20 Remove the shorting bar from ...

Page 10: ...ttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_GREATER_THAN_10_GIGAOHM 1 NI 4070 4072 2 Fluke 5700A 5720A Calibrator 3 Fluke 5440 Cable Table 2 Fluke 5440 Cable Connections Banana Plug Connector NI 4070 4072 Banana Plug Color Fluke 5440 Cable Binding Post Label Fluke 5700A 5720A Calibrator HI Red OUTPUT HI LO Black OUTPUT LO No con...

Page 11: ...ttribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_10_MEGAOHM 30 Call niDMM_ConfigureMultiPoint with the following parameters Trigger Count 1 Sample Count 10 Sample Trigger NIDMM_VAL_IMMEDIATE SampleInterval 1 31 Call niDMM_ReadMultiPoint with the following parameters Maximum Time NIDMM_VAL_TIME_LIMIT_AUTO Array Size 10 Average the results by summing the returned reading array of th...

Page 12: ...cked to 2 2 V This range prevents a 50 Ω calibrator output resistance from creating a voltage divider with the internal resistance of the NI 4070 4072 39 Set the input resistance of the NI 4070 4072 to 10 GΩ by calling niDMM_SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_GREATER_THAN_10_GIGAOHM 40 Call niDMM_Read Subtract the p...

Page 13: ...AttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_GREATER_THAN_10_GIGAOHM 51 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 17 52 Set the input resistance of the NI 4070 4072 to 10 MΩ by calling niDMM_SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Att...

Page 14: ...070 4072 to 10 MΩ by calling niDMM_SetAttributeViReal64 with the following parameters Attribute_ID NIDMM_ATTR_INPUT_RESISTANCE Attribute_Value NIDMM_VAL_10_MEGAOHM 64 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 17 65 Output 100 V on the calibrator Caution Avoid touching the connections when generating a high voltage from the calibrator 66 Call niDMM_Config...

Page 15: ...ant 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 A...

Page 16: ...ureMeasurement with the following parameters Function NIDMM_VAL_AC_VOLTS_DCCOUPLED Range 0 05 Resolution 50e 9 12 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 18 13 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 Ta...

Page 17: ...d the remaining parameters as shown in Table 4 for the current iteration Table 3 niDMM_ConfigureMeasurement Parameters Iteration Calibrator Output niDMM_ConfigureMeasurement Parameters 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_VOLT...

Page 18: ...arameters Iteration Calibrator Output niDMM_ConfigureMeasurement Parameters 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...

Page 19: ... Table 18 23 Output 50 V at 30 Hz on the calibrator Table 5 niDMM_ConfigureMeasurement Parameters Iteration Calibrator Output niDMM_ConfigureMeasurement Parameters Amplitude Frequency Function Range Resolution 1 5 V 50 Hz NIDMM_VAL_AC_VOLTS 5 5e 6 5 V 50 Hz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 2 5 V 1 kHz NIDMM_VAL_AC_VOLTS 5 5e 6 5 V 1 kHz NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 5e 6 3 5 V 1 kHz NIDMM_VAL_...

Page 20: ...its listed in Table 18 d Call niDMM_ConfigureMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e Call niDMM_Read Verify that this measurement falls between the limits listed in Table 18 Table 6 niDMM_ConfigureMeasurement Parameters Iteration Calibrator Output niDMM_ConfigureMeasurement Parameters Amplitude Frequency Function Range Resolution 1 50 V 50 Hz NIDMM_VAL_AC_VOLTS 50 50e 6 5...

Page 21: ...DMM_VAL_AC_VOLTS and the remaining parameters as shown in Table 7 for the current iteration c Call niDMM_Read Verify that this measurement falls between the limits listed in Table 18 d Call niDMM_ConfigureMeasurement again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED e Call niDMM_Read Verify that this measurement falls between the limits listed in Table 18 Table 7 niDMM_ConfigureMeasurement Param...

Page 22: ...re 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 8 lists t...

Page 23: ...440 Cables Table 8 Fluke 5440 Cable Connections Fluke 5440 Cable Identification Banana Plug Connector NI 4070 4072 Banana Plug Color Fluke 5440 Cable Binding Post Fluke 5700A 5720A Calibrator First cable HI Red OUTPUT HI LO Black OUTPUT LO No connection Blue V GUARD Second cable HI SENSE Red SENSE HI LO SENSE Black SENSE LO No connection Blue V GUARD HI LO 300V MAX HI LO AUX I O 1A 250V MAX 300V M...

Page 24: ...ding to Table 9 for the current iteration d Call niDMM_Read Verify that this measurement falls between the tolerances listed in Table 19 Tolerances are provided instead of absolute limits because your calibrator will have different discrete resistance values 6 Repeat step 5 for each of the remaining iterations listed in Table 9 Table 9 niDMM_ConfigureMeasurement Parameters Iteration Calibrator Out...

Page 25: ... 4070 4072 complete the following steps 1 Plug in the insulated banana plug shorting bar across the HI and LO banana plug connectors on the NI 4070 4072 2 Wait one minute for the thermal EMF to stabilize 3 Call niDMM_reset 4 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES Range 10e3 Resolution 0 01 5 Call niDMM_ConfigureOffsetCompOhms with OffsetCompOhms...

Page 26: ...t connections Table 2 lists the cable connections 16 Wait two minutes for the thermal EMF to stabilize if the Fluke 5440 cable was not previously used in this configuration 17 Output 100 MΩ on the calibrator without external sense or 2 wire compensation 18 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES Range 100e6 Resolution 100 19 Call niDMM_Read Verif...

Page 27: ...kΩ on the calibrator without external sense or 2 wire compensation 27 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES Range 100e3 Resolution 0 1 28 Call niDMM_Read Verify that the result falls between the tolerances listed in Table 20 29 Connect the NI 4070 4072 and the Fluke 5700A 5720A calibrator using two sets of Fluke 5440 cables a double banana plug...

Page 28: ... external sense turned on Table 10 Fluke 5440 Cable Connections Banana Plug Connector NI 4070 4072 Banana Plug Color Fluke 5440 Cable Binding Post Label Fluke 5700A 5720A Calibrator HI Red OUTPUT HI LO Black OUTPUT LO No connection Blue V GUARD HI Red OUTPUT HI SENSE LO Black OUTPUT LO SENSE No connection Blue V GUARD HI LO AUX I O 300V MAX 5V MAX AMPS NI PXI 407x 61 2 Digit FlexDMM 500V MA X CAT ...

Page 29: ...t the result falls between the tolerances listed in Table 20 39 Output 100 Ω on the calibrator with 2 wire compensation and external sense turned on 40 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_2_WIRE_RES Range 100 Resolution 100e 6 41 Call niDMM_Read Verify that the result falls between the tolerances listed in Table 20 You have completed verifying the 2 wir...

Page 30: ...able connections Figure 4 Cable Connections for Current 3 Call niDMM_reset to reset the NI 4070 4072 to a known state 4 Set the current output on the calibrator to NORM and output 0 A 1 NI 4070 4072 2 Fluke 5700A 5720A Calibrator 3 Fluke 5440 Cable Table 11 Fluke 5440 Cable Connections Banana Plug Connector NI 4070 4072 Banana Plug Color Fluke 5440 Cable Binding Post Fluke 5700A 5720A Calibrator H...

Page 31: ... niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_CURRENT Range 1 Resolution 1e 6 10 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 21 11 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_DC_CURRENT Range 0 02 Resolution 20e 9 12 Call niDMM_Read to configure the NI 4070 4072 for a current mode befor...

Page 32: ...Range 1 Resolution 1e 6 24 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 21 25 Output 1 A on the calibrator 26 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 21 You have completed verifying the DC current of the NI 4070 4072 Select one of the following options If you want to continue verifying other modes go to the Veri...

Page 33: ...tion 10e 9 5 Call niDMM_ConfigureAutoZeroMode with the following parameters Auto Zero Mode NIDMM_VAL_AUTO_ZERO_ON 6 Call niDMM_Read to configure the NI 4070 4072 for a current mode before applying current 7 Output 1 mA at 1 kHz on the calibrator with the current output set to NORM 8 Call niDMM_Read Verify that this measurement falls between the limits listed in Table 22 9 Output 10 mA at 1 kHz on ...

Page 34: ...ing 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 Note 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 To verify the ...

Page 35: ...ifying 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 Verifying Capacitance and Inductance NI 4072 Only This...

Page 36: ...on 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 stabili...

Page 37: ...ances listed in Table 24 10 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 11 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_CAPACITANCE Range 300e 12 Resolution 50e 15 12 Set the number of averag...

Page 38: ...racy specifications 17 Call niDMM_Read Verify that this measurement falls between the tolerances listed in Table 24 18 Call niDMM_ConfigureMeasurement with the following parameters Function NIDMM_VAL_CAPACITANCE Range 10e 9 Resolution 1e 12 19 Set the number of averages of the NI 4072 to 20 by calling niDMM_SetAttributeViInt32 with the following parameters Attribute_ID NIDMM_ATTR_LC_NUMBER_MEAS_TO...

Page 39: ...on call niDMM_close to close the session If you are performing a post adjustment verification go to the Completing the Adjustment Procedures section 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 Value and Frequency ...

Page 40: ...tions on calibrating these devices Note Ensure that the calibrator is warmed up for at least 60 minutes before you begin this procedure 3 Reset the calibrator 4 If you have not already done so allow the NI 4070 4072 to warm up for 60 minutes within a powered on PXI chassis or PC Adjusting DC Voltage and Resistance To adjust the DC voltage and resistance of the NI 4070 4072 complete the following s...

Page 41: ...ll niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_DC_VOLTS Range 0 1 Input Resistance NIDMM_VAL_10_MEGAOHM Expected Value 0 1 9 Output 10 V on the calibrator 10 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_DC_VOLTS Range 10 Input Resistance NIDMM_VAL_GREATER_THAN_10_GIGAOHM Expected Value 10 11 Output 10 V on the calibrator 12 Call niDMM_CalAdjustGain wit...

Page 42: ...l sense or 2 wire compensation 22 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_2_WIRE_RES Range 10e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value the display on the calibrator for 0 Ω 23 Output 10 MΩ from the calibrator without external sense 24 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_2_WIRE_RES Range 10e6 Input Resistance NIDMM_VAL...

Page 43: ...ing parameters Mode NIDMM_VAL_2_WIRE_RES Range 100e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value the display on the calibrator for 100 MΩ 35 Output 0 Ω from the calibrator without external sense or 2 wire compensation 36 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_2_WIRE_RES Range 100e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value the display on the...

Page 44: ...the calibrator with external sense turned on and 2 wire compensation turned off 45 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_4_WIRE_RES Range 100e3 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value the display on the calibrator for 100 kΩ 46 Output 0 Ω on the calibrator with external sense turned on and 2 wire compensation turned off 47 Call niDMM_CalAdjustGain wi...

Page 45: ... compensation turned off 56 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_4_WIRE_RES Range 10e6 Input Resistance NIDMM_VAL_RESISTANCE_NA 57 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_4_WIRE_RES Range 1e6 Input Resistance NIDMM_VAL_RESISTANCE_NA 58 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_4_WIRE_RES Range 1e3 Inpu...

Page 46: ...DMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_2_WIRE_RES Range 1e3 Input Resistance NIDMM_VAL_RESISTANCE_NA 68 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_2_WIRE_RES Range 100 Input Resistance NIDMM_VAL_RESISTANCE_NA 69 Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_SECTION You have completed adjusting the DC voltage and resistance mod...

Page 47: ...ust 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 2 lists the cable connections 3 Refer to ...

Page 48: ...brator Output niDMM_CalAdjustGain Parameters Amplitude f kHz Mode Range V Input Resistance Expected Value 1 50 mV 1 NIDMM_VAL_AC_VOLTS 0 05 NIDMM_VAL_1_ME GAOHM 0 05 50 mV 1 NIDMM_VAL_AC_VOLTS_ DCCOUPLED 0 05 NIDMM_VAL_1_ME GAOHM 0 05 2 500 mV 1 NIDMM_VAL_AC_VOLTS 0 5 NIDMM_VAL_1_ME GAOHM 0 5 500 mV 1 NIDMM_VAL_AC_VOLTS_ DCCOUPLED 0 5 NIDMM_VAL_1_ME GAOHM 0 5 3 5 V 1 NIDMM_VAL_AC_VOLTS 5 NIDMM_VAL...

Page 49: ...ter remains the same for all instances of this function c Call niDMM_CalAdjustACFilter again changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED Table 14 niDMM_CalAdjustOffset Parameters Iteration niDMM_CalAdjustOffset Parameters Mode Range V Input Resistance Ω 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...

Page 50: ... 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 50 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_DCCOUPL...

Page 51: ...TS 5 100e3 5 V 100 NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 100e3 22 5 V 200 NIDMM_VAL_AC_VOLTS 5 200e3 5 V 200 NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 200e3 23 5 V 300 NIDMM_VAL_AC_VOLTS 5 300e3 5 V 300 NIDMM_VAL_AC_VOLTS_DCCOUPLED 5 300e3 24 5 V 500 NIDMM_VAL_AC_VOLTS 5 500e3 5 V 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_...

Page 52: ... 1e3 34 100 V 5 NIDMM_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 38 100 V 200 NIDMM_VAL_AC_VOLTS 300 200e3 100 V...

Page 53: ...acy is insignificant for your application you can skip this section and select one of the following options If you skip this section and you are calibrating an NI 4072 go to the Adjusting Capacitance and Inductance NI 4072 Only section 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 ...

Page 54: ...stance NIDMM_VAL_RESISTANCE_NA Expected Value 0 02 9 Output 0 A on the calibrator 10 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_DC_CURRENT Range 0 02 Input Resistance NIDMM_VAL_RESISTANCE_NA 11 Call niDMM_CalAdjustOffset with the following parameters Mode NIDMM_VAL_AC_CURRENT Range 0 01 Input Resistance NIDMM_VAL_RESISTANCE_NA 12 Output 200 mA on the calibrator 13 Call...

Page 55: ...MM_VAL_DC_CURRENT Range 1 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value 1 21 Output 1 A on the calibrator 22 Call niDMM_CalAdjustGain with the following parameters Mode NIDMM_VAL_DC_CURRENT Range 1 Input Resistance NIDMM_VAL_RESISTANCE_NA 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 Mode N...

Page 56: ...f you do not want to verify the new calibration coefficients go to the Completing the Adjustment Procedures section If you 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 fixt...

Page 57: ...plete the appropriate procedures To finish the calibration and close the session go to the Completing the Adjustment Procedures section Completing the Adjustment Procedures To complete the adjustment procedure for the NI 4070 4072 and close the session call niDMM_CloseExtCal with the following parameter Action NIDMM_EXTCAL_ACTION_SAVE if the results of the calibration were satisfactory and you wan...

Page 58: ...on the latest specifications DC Voltage Table 17 NI 4070 4072 DC Voltage Verification Limits Calibrator Amplitude Range Input Resistance 2 Year Limits 24 Hour Limits Lower Upper Lower Upper 0 V 1 V 10 GΩ 10 MΩ 6 μV 6 μV 2 μV 2 μV 0 V 10 V 10 GΩ 10 MΩ 60 μV 60 μV 20 μV 20 μV 0 V 100 V 10 MΩ 600 μV 600 μV 200 μV 200 μV 0 V 300 V 10 MΩ 6 mV 6 mV 1 8 mV 1 8 mV 100 mV 100 mV 10 GΩ 10 MΩ 0 099994 V 0 10...

Page 59: ... 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 5 V 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 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 5 V 30 Hz 5 V...

Page 60: ... 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 Table 19 NI 4070 4072 4 Wire Resistance Verification Tolerances Calibrator Resistance Range 2 Year Tolerance ppm of Calibrator Resistance ppm of Range 24 Hour Tolerance ppm of Calibrator Resistance pp...

Page 61: ...olerance ppm of Calibrator Resistance ppm of Range 0 Ω 10 kΩ 0 23 0 22 0 Ω 1 kΩ 0 203 0 202 0 Ω 100 Ω 0 2010 0 2010 100 MΩ 100 MΩ 6000 40 900 20 10 MΩ 10 MΩ 400 10 100 2 1 MΩ 1 MΩ 90 10 20 2 100 kΩ 100 kΩ 80 8 15 4 10 kΩ 10 kΩ 80 23 12 22 1 kΩ 1 kΩ 80 203 12 202 100 Ω 100 Ω 80 2010 15 2010 Table 21 NI 4070 4072 DC Current Verification Limits Calibrator Amplitude Range 2 Year Limits Lower Upper 0 A...

Page 62: ... Year Limits Amplitude Frequency Lower Upper 1 mA 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 1 A 99 7 mA 100 3 mA 1 A 1 kHz 1 A 0 9988 A 1 0012 A Table 23 Frequency Limits NI 6608 Output Frequency 2 Year Limits Lower Upper 1 Hz 0 9999 Hz 1 0001 Hz 20 kHz 19 998 kHz 20 002 kHz 500 kHz...

Page 63: ...that correspond to the NI 4072 accuracy specifications Table 24 NI 4072 Capacitance and Inductance Verification Tolerances Verification Values Range 2 Year Tolerances of Reading of Range 0 pF 300 pF 0 0 5 0 μH 10 μH 0 1 270 pF 300 pF 0 15 0 5 1 nF 1 nF 0 15 0 1 1 nF 10 nF 0 15 0 1 100 nF 100 nF 0 15 0 1 100 nF 1 μF 0 18 0 1 10 μF 10 μF 0 18 0 1 10 μF 100 μF 0 18 0 1 1 000 μF 1 000 μF 0 18 0 1 1 00...

Page 64: ...ccuracy 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 a...

Page 65: ...Corporation 65 NI 4070 4072 Calibration Procedure Table 25 Summary of Adjustment Options Adjustment Optional Required DC Voltage Yes Resistance Yes AC Voltage Yes AC DC Current Yes Inductance and Capacitance NI 4072 only Yes ...

Page 66: ...uency Mode Go to Verifying Capacitance and Inductance Go to Verifying Frequency Go to Verifying AC Current Go to Verifying DC Current Go to Verifying 2 Wire Resistance Go to Verifying 4 Wire Resistance Go to Verifying AC Voltage Go to Verifying DC Voltage Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No Go to Initial Setup Pre Adjustment Post Adjustment Go to Adjustment Procedures Flowchart...

Page 67: ...cation Procedures Flowchart Verification Go to Adjusting DC Voltage and Resistance Go to Adjusting AC Voltage Modes No No Yes Yes No Go to Completing the Adjustment Procedures Adjust AC Voltage Modes Adjust Current Modes Go to Adjusting Current Modes Perform Post Adjustment Verification Go to Adjusting Capacitance and Inductance ...

Page 68: ...ruments Web 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 Thi...

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