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National Instruments Corporation

NI 4070/4072 Calibration Procedure

You have completed adjusting the AC voltage modes of the NI 4070/4072.
Select one of the following options:

•

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 device.

•

If you 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:

•

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 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:

Reset the calibrator.

Fasten the connectors on one end of the Fluke 5440 cable to the
NI 4070/4072

HI SENSE

and

banana plug connectors, and fasten

the connectors on the other end of the cable to the

and

calibrator

binding posts. Figure 4 shows the correct connections. Table 11 lists
the cable connections.

Call

niDMM_ConfigureMeasurement

with the following

parameters:

•

Function

NIDMM_VAL_DC_CURRENT

•

Range

0.02

Содержание FlexDMM PXI-4070

Страница 1: ...ion 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 Equipmen...

Страница 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 y...

Страница 3: ...uency 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 functio...

Страница 4: ...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 pa...

Страница 5: ...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...

Страница 6: ...low 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...

Страница 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...

Страница 8: ..._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_VA...

Страница 9: ...wing parameters Function NIDMM_VAL_DC_VOLTS Range 300 Resolution 300e 6 18 Set the input resistance of the NI 4070 4072 to 10 M by calling niDMM_SetAttributeViReal64 with the following parameters Attr...

Страница 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 Cab...

Страница 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_IM...

Страница 12: ...cked 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 39 Set the input resistance of the NI 4070 4072 to...

Страница 13: ...ttributeViReal64 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...

Страница 14: ...70 4072 to 10 M 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 me...

Страница 15: ...nt 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 Adju...

Страница 16: ...reMeasurement 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 1...

Страница 17: ...the remaining parameters as shown in Table 4 for the current iteration Table 3 niDMM_ConfigureMeasurement Parameters Iteration Calibrator Output niDMM_ConfigureMeasurement Parameters Amplitude Freque...

Страница 18: ...rameters 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_DC...

Страница 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 Re...

Страница 20: ...ts 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 T...

Страница 21: ...MM_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_Confi...

Страница 22: ...e 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 bana...

Страница 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 ca...

Страница 24: ...according 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 becaus...

Страница 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 stabili...

Страница 26: ...ct 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 M on the cal...

Страница 27: ...k 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 niDM...

Страница 28: ...xternal 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...

Страница 29: ...the result falls between the tolerances listed in Table 20 39 Output 100 on the calibrator with 2 wire compensation and external sense turned on 40 Call niDMM_ConfigureMeasurement with the following...

Страница 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...

Страница 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...

Страница 32: ...ange 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...

Страница 33: ...ion 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 curr...

Страница 34: ...ng 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 No...

Страница 35: ...fying 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 sect...

Страница 36: ...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...

Страница 37: ...ces 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...

Страница 38: ...acy 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_C...

Страница 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...

Страница 40: ...ions 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 th...

Страница 41: ...l 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_CalAdjustGa...

Страница 42: ...nal 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 t...

Страница 43: ...lowing parameters Mode NIDMM_VAL_2_WIRE_RES Range 100e6 Input Resistance NIDMM_VAL_RESISTANCE_NA Expected Value the display on the calibrator for 100 M 35 Output 0 from the calibrator without external...

Страница 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_V...

Страница 45: ...mpensation 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 f...

Страница 46: ...MM_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...

Страница 47: ...st 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...

Страница 48: ...rator 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_ DCCOUPL...

Страница 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_Cal...

Страница 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_...

Страница 51: ...S 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_VOL...

Страница 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_V...

Страница 53: ...cy 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 a...

Страница 54: ...tance 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...

Страница 55: ...M_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 R...

Страница 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 c...

Страница 57: ...mplete 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...

Страница 58: ...limits based upon 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...

Страница 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 50...

Страница 60: ...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...

Страница 61: ...24 Hour Tolerance ppm of Calibrator Resistance ppm of Range 0 10 k 0 23 0 22 0 1 k 0 203 0 202 0 100 0 2010 0 2010 100 M 100 M 6000 40 900 20 10 M 10 M 400 10 100 2 1 M 1 M 90 10 20 2 100 k 100 k 80...

Страница 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 m...

Страница 63: ...ces 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...

Страница 64: ...curacy 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...

Страница 65: ...orporation 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 Capac...

Страница 66: ...ency 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...

Страница 67: ...ation 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 A...

Страница 68: ...uments 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...

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