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National Instruments NI 4070/4072 6 1/2-Digit FlexDMM Verifying 2-Wire Resistance

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NI 4070/4072 Calibration Procedure 24 ni.com

6. Repeat step 5 for each of the remaining iterations listed in Table8.

You have completed verifying the 4-wire resistance of the NI4070/4072.

Select one of the following options:

• If you want to continue verifying other modes, go to the Verifying

2-Wire Resistance 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 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 plug connectors on the NI 4070/4072.

2. Wait one minute for the thermal EMF to stabilize.

3. Call niDMM_reset.

Table 8. niDMM_ConfigureMeasurement Parameters

Iteration

Calibrator

Output

niDMM_ConfigureMeasurement Parameters

OffsetCompOhmsFunction Range Resolution

110MΩNIDMM_VAL_4_WIRE_RES 10e6 10 OFF

21MΩNIDMM_VAL_4_WIRE_RES 1e6 1OFF

3100kΩNIDMM_VAL_4_WIRE_RES 100e3 0.1 OFF

410kΩNIDMM_VAL_4_WIRE_RES 10e3 0.01 ON

51kΩNIDMM_VAL_4_WIRE_RES 1e3 1e–3 ON

6100ΩNIDMM_VAL_4_WIRE_RES 100 100e–6 ON

7 0ΩNIDMM_VAL_4_WIRE_RES 10e6 10 OFF

8 0ΩNIDMM_VAL_4_WIRE_RES 1e6 1OFF

9 0ΩNIDMM_VAL_4_WIRE_RES 100e3 0.1 OFF

10 0ΩNIDMM_VAL_4_WIRE_RES 10e3 0.01 ON

11 0ΩNIDMM_VAL_4_WIRE_RES 1e3 1e–3 ON

12 0ΩNIDMM_VAL_4_WIRE_RES 100 100e–6 ON

Contents

Main CALIBRATION PROCEDURE NI 4070/4072 6-Digit FlexDMM Contents Conventions Software Requirements Documentation Requirements Calibration Function Reference Password Calibration Interval Test Equipment Required Test Equipment Requirements for All NI 4070/4072 Devices Additional Requirements for the NI 4072 Optional Test Equipment Test Conditions Calibration Procedures Initial Setup Verification Procedures Verifying DC Voltage Page NI 4070/4072 Calibration Procedure 10 ni.com Figure 1. Cable Connections for Voltage and 2-Wire Resistance niDMM_SetAttributeViReal64 with the following parameters: Attribute_ID = Attribute_Value = NIDMM_VAL_GREATER_THAN_10_GIGAOHM 1 NI4070/4072 2 Fluke 5700A/5720A Calibrator 3 Fluke 5440 Cable Table 1. Fluke 5440 Cable Connections BananaPlug Connector (NI4070/4072) Banana Plug Color (Fluke 5440Cable) Page Page Page Page Verifying AC Voltage Page Page Page Page Page Page Verifying 4-Wire Resistance Page Verifying 2-Wire Resistance Page Page Page Page Page Verifying DC Current Page Page Verifying AC Current Verifying Frequency Page Page Verifying Capacitance and Inductance (NI 4072 Only) Page Page Page Adjustment Procedures Setting Up the Test Equipment Adjusting DC Voltage and Resistance Page Page Page Page Page Adjusting AC Voltage (AC- and DC-Coupled) Modes Page Page Page Table 13. niDMM_CalAdjustACFilter Parameters (Continued) Adjusting Current Modes Page Page Adjusting Capacitance and Inductance (NI 4072 Only) Page Completing the Adjustment Procedures Verification Limits DC Voltage AC Voltage Table 16. NI 4070/4072 AC Voltage Verification Limits Table 15. NI 4070/4072 DC Voltage Verification Limits (Continued) Table 16. NI 4070/4072 AC Voltage Verification Limits (Continued) 4-Wire Resistance 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. 2-Wire Resistance Note Tolerances are provided for 2-wire resistance instead of absolute limits because the DC Current AC Current Table 19. NI 4070/4072 DC Current Verification Limits Table 20. NI 4070/4072 AC Current Verification Limits Table 18. NI 4070/4072 2-Wire Resistance Verification Tolerances (Continued) Frequency Capacitance and Inductance Note Because the actual capacitance verification values can differ from the following values, Table22 provides tolerances that correspond to the NI 4072 accuracy specifications Table 21. Frequency Limits Appendix A: Calibration Options Page Figure 4. Verification Procedures Flowchart NI 4070/4072 Calibration Procedure 66 ni.com Figure 5. Adjustment Procedures Flowchart National Instruments Corporation 67 NI 4070/4072 Calibration Procedure Where to Go for Support