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Manual National Instruments NI 4070/4072 6 1/2-Digit FlexDMM

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  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 1

    CALIBRATION PROCEDURE NI 4070/4072 6½-Digit FlexDMM This document contains step-by-step in structions for writing an ex ternal calibration procedure for the National Instruments PXI/PCI-407 0 and NI PXI-4072 digital multimet ers (DMMs). Each of these National Instruments DMMs is a 6½-digit FlexDMM and 1.8 MS/s isolated digitizer . For more inform ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 2

    NI 4070/4072 Calibrati on Procedure 2 ni.com Conventions The following conventions ar e used in this document: » The » symbol leads you through nested menu items and dialog box opt ions to a final action. The sequence File»Page Setup»Options directs you t o pull down the File menu, select the Page Setup item, and select Options from the last di ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 3

    © National Instruments Corporation 3 NI 4070/4072 Calibration Procedure The procedures in this document are described using C func tion calls. Y ou also can program in LabVIEW usin g the VIs that correspond to the C function calls. Documentation Requirements In addition to this calibratio n document, you may find th e following references helpful ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 4

    NI 4070/4072 Calibrati on Procedure 4 ni.com Calibration Inter val The accuracy requirements of your measurement application determine how often you should calibrate th e NI 4070/40 72. NI recommends performing a complete calibrati on at l east once every two years. NI does not guarantee the absolute accuracy of the NI 4070/ 4072 beyond this two-ye ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 5

    © National Instruments Corporation 5 NI 4070/4072 Calibration Procedure 300 pF range, a capacitor with v alu es between 90 –100% of full scale should be used. NI suggests using the capacitance standards of the SCA Series from IET Labs. This cal ibration procedure assumes the use o f 2 7 0p F , 1n F , 1 0 0n F , 1 0 μ F , and 1000 μ F standards ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 6

    NI 4070/4072 Calibr ation Procedure 6 ni.com • Clean any oxidation from the banana plugs on the Fluke 5440 cables before plugging them into the binding posts of th e calibrator or the banana plug connectors o f the NI 4070 /4072. Oxidation tarnishes th e copper banana plugs so that they appear dull rather than shiny and leads to greater thermal E ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 7

    © National Instruments Corporation 7 NI 4070/4072 Calibration Procedure Fluke 5700A/5720A user d ocumentation for instruction s on calibrating these de vices. Note Ensure that both the calibrator an d the NI 4070/ 4072 (installed in a powered-on PXI chassis or PC) are warmed up for at leas t 60 minutes before you begin this procedure. 3. Call niDM ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 8

    NI 4070/4072 Calibrati on Procedure 8 ni.com V erifying DC V oltage To verify DC voltage of the NI 4070/4072, com plete the following steps: 1. Plug in the insulated banana plug shorting bar acro ss the HI and LO banana plug connectors on the NI 4070/4072. 2. W ait one minu te for the thermal EMF to stabil ize. 3. Call niDMM_reset . 4. Call niDMM_C ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 9

    © National Instruments Corporation 9 NI 4070/4072 Calibration Procedure 12. Set the input resistance of the NI 4070/4072 to 10 M Ω by calling niDMM_SetAttributeViReal64 with the following parameters: • Attribute_ID = NIDMM_ATTR _INPUT_RESISTANCE • Attribute_Value = NIDMM_VAL_10_MEGAOHM 13. Call niDMM_Read . V erify that this measurement f all ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 10

    NI 4070/4072 Calibrati on Procedure 10 ni.com Figure 1. Cable Connections for Volt age and 2-Wire Resistance 23. W ait two minutes for th e thermal EMF to stabilize. 24. Generate 0 V on the calibrator . 25. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_DC_VOLTS • Range = 0.1 • Resolution = 100e–9 26 ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 11

    © National Instruments Corporation 11 NI 4070/4072 Calibration Procedure 27. Call niDMM_ConfigureMultiPoint with the following parameters: • Trigger Count = 1 • Sample Count = 10 • Sample Trigger = NIDMM_VAL_IMMEDIATE • Sample Interval = –1 28. Call niDMM_ReadMultiPoint with the fo llo wing parameters: • Maximum Time = NIDMM_ VAL_TIME_ ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 12

    NI 4070/4072 Calibrati on Procedure 12 ni.com 34. Set the input resistance of the NI 4070/4072 to >10 G Ω by calling niDMM_SetAttributeViReal64 with the following parameters: • Attribute_ID = NIDMM_ATTR _INPUT_RESISTANCE • Attribute_Value = NIDMM_VAL_GREATER_ THAN_10_GIGAOHM 35. Call niDMM_Read . Subtract the pre viously stored 100 mV >1 ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 13

    © National Instruments Corporation 13 NI 4070/4072 Calibration Procedure 45. Set the input resistance of the NI 4070/4072 to >10 G Ω by calling niDMM_SetAttributeViReal64 with the following parameters: • Attribute_ID = NIDMM_ATTR _INPUT_RESISTANCE • Attribute_Value = NIDMM_VAL_GREATER_ THAN_10_GIGAOHM 46. Call niDMM_Read . V erify that thi ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 14

    NI 4070/4072 Calibrati on Procedure 14 ni.com 58. Set the input resistance of the NI 4070/4072 to 10 M Ω by calling niDMM_SetAttributeViReal64 with the following parameters: • Attribute_ID = NIDMM_ATTR _INPUT_RESISTANCE • Attribute_Value = NIDMM_VAL_10_MEGAOHM 59. Call niDMM_Read . V erify that this measurement f alls betw een the limits liste ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 15

    © National Instruments Corporation 15 NI 4070/4072 Calibration Procedure 71. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_DC_VOLTS • Range = 300 • Resolution = 300e–6 72. Call niDMM_Read . Before you apply the volta g e, the DMM must be in the 300 V range. 73. Output 300 V on the calibrator . 74. ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 16

    NI 4070/4072 Calibrati on Procedure 16 ni.com 5. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_AC_VOLTS • Range = 0.05 • Resolution = 50e–9 6. Call niDMM_Read . V erify that this meas urement falls between the limits listed in T able 16. 7. Call niDMM_ConfigureMeasurement with t he follo wing parame ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 17

    © National Instruments Corporation 17 NI 4070/4072 Calibration Procedure 13. Repeat step 12 for each of the re maining iterations sho wn in T able 2. 14. Output 500 mV at 30 Hz o n the calibrato r . 15. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_AC_VOLTS_DCCOUPLED • Range = 0.5 • Resolution = 500e ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 18

    NI 4070/4072 Calibrati on Procedure 18 ni.com c. Call niDMM_Read . V erify that this meas urement falls between the limits listed in T able 16. d. Call niDMM_ConfigureMeasurement again, changing Mode to NIDMM_VAL_AC_VOLTS_DCCOUPLED . e. Call niDMM_Read . V erify that this meas urement falls between the limits listed in T able 16. 18. Output 5 V at ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 19

    © National Instruments Corporation 19 NI 4070/4072 Calibration Procedure 21. Refer to T a ble 4 for the appropriate calibrator outputs and parameter v alues as you complete the following steps: a. On the calibrator , output the value listed in the Calibrator Output column in T able 4 for the curren t iteration. b. C a l l niDMM_ConfigureMeasuremen ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 20

    NI 4070/4072 Calibrati on Procedure 20 ni.com 23. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_AC_VOLTS_DCCOUPLED • Range = 50 • Resolution = 50e–6 24. Call niDMM_Read . V erify that this measurement f alls betw een the limits listed in T able 16. 25. Refer to T a ble 5 for the appropriate calibrat ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 21

    © National Instruments Corporation 21 NI 4070/4072 Calibration Procedure 26. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_AC_VOLTS_DCCOUPLED • Range = 300 • Resolution = 300e–6 27. Call niDMM_Read . The DMM must be in the 3 00 V range before you apply the voltage. 28. Output 219 V at 30 Hz on the ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 22

    NI 4070/4072 Calibrati on Procedure 22 ni.com 31. Reset the calibrator for safety reasons. Y ou have completed v erifying the A C voltage of the NI 4070/40 72. Select one of the following options: • If you want to continue verifying o ther modes, go to the Verifying 4-Wire Resistance section. • If you do not want to v erify ot her modes and you ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 23

    © National Instruments Corporation 23 NI 4070/4072 Calibration Procedure 3. W ait two minutes for th e thermal EMF to stabilize if the Fluke 5440 cables were not previously connected in this configuration. 4. Call niDMM_reset . 5. Refer to T able 8 for th e appropriate calibrato r output and funct ion parameter values as you complete the following ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 24

    NI 4070/4072 Calibrati on Procedure 24 ni.com 6. Repeat step 5 for each of the rema ining iterations listed in T able 8. Y ou hav e completed verifying the 4-wire resistance of the NI 4070/4072. Select one of the follo wing options: • If you want to continue verifying o ther modes, go to the Verifying 2-Wire Resistance section. • If you do not ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 25

    © National Instruments Corporation 25 NI 4070/4072 Calibration Procedure 4. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_2_WIRE_RES • Range = 10e3 • Resolution = 0.01 5. Call niDMM_ConfigureOffsetCompOhms with OffsetCompOhms set to NIDMM_VAL_OFFSET_COMP_OHMS_ON . 6. Call niDMM_Read . V erify that th ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 26

    NI 4070/4072 Calibrati on Procedure 26 ni.com 19. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_2_WIRE_RES • Range = 100e6 • Resolution = 100 20. Call niDMM_Read and store the result as the 100 M Ω range of fset. 21. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDM ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 27

    © National Instruments Corporation 27 NI 4070/4072 Calibration Procedure 28. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_2_WIRE_RES • Range = 10e3 • Resolution = 0.01 29. Call niDMM_ConfigureMultiPoint with the following parameters: • Trigger Count = 1 • Sample Count = 4 • Sample Trigger = NI ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 28

    NI 4070/4072 Calibrati on Procedure 28 ni.com 35. Call niDMM_ConfigureMultiPoint with the following parameters: • Trigger Count = 1 • Sample Count = 10 • Sample Trigger = NIDMM_VAL_IMMEDIATE • Sample Interval = –1 36. Call niDMM_ReadMultiPoint with the fo llo wing parameters: • Maximum Time = NIDMM_ VAL_TIME_LIMIT_AUTO • Array Size = ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 29

    © National Instruments Corporation 29 NI 4070/4072 Calibration Procedure 45. Call niDMM_Read . Subtract the pre viously stored 1 M Ω range offset from this measurement. V erify that the result falls between the tolerances listed in T able 18. 46. Output 100 k Ω on the calibrator without external sense or 2-wire compensation. 47. Call niDMM_Confi ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 30

    NI 4070/4072 Calibrati on Procedure 30 ni.com 57. Call niDMM_Read . Subtract the pre viously calculated 100 Ω range of fset from this measur ement. V erify that the result falls between the tolerances listed in T able 18. Y ou hav e completed verifying the 2-wire resistance of the NI 4070/4072. Select one of the follo wing options: • If you want ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 31

    © National Instruments Corporation 31 NI 4070/4072 Calibration Procedure 3. Call niDMM_reset to reset the NI 4070/4072 to a known state. 4. Set the current output on the calibrato r to NORM and output 0 A. 5. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_DC_CURRENT • Range = 0.02 • Resolution = 20e? ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 32

    NI 4070/4072 Calibrati on Procedure 32 ni.com 13. Output 20 mA on the calibrator . 14. Call niDMM_Read . V erify that this measurement f alls betw een the limits listed in T able 19. 15. Output –20 mA on the calib rator . 16. Call niDMM_Read . V erify that this measurement f alls betw een the limits listed in T able 19. 17. Output 200 mA on the c ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 33

    © National Instruments Corporation 33 NI 4070/4072 Calibration Procedure V erifying AC Current To verify the AC current of the NI 407 0/4072, complete the followin g 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 conn ectors, and fasten the connectors on ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 34

    NI 4070/4072 Calibrati on Procedure 34 ni.com 14. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_AC_CURRENT • Range = 1 • Resolution = 1e–6 15. Call niDMM_Read . V erify that this measurement f alls betw een the limits listed in T able 20. 16. Output 1 A at 1 kHz on t he calibrator . 17. Call niDMM_R ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 35

    © National Instruments Corporation 35 NI 4070/4072 Calibration Procedure T o verify the frequency of the NI 4070/4072, comple te the following steps: 1. Remov e all connections from the NI 4070/40 72. Note Polarity is not importan t in steps 2, 3, and 5. 2. Connect one end of the coaxial cable to the Pomona 4892 double banana plug. 3. T igh ten th ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 36

    NI 4070/4072 Calibrati on Procedure 36 ni.com 12. Call GPCTR_Change_Parameter with the following parameters: • deviceNumber = the device number of the NI 6608, as signed by MAX • gpctrNum = ND_COUNTER_0 • paramID = ND_COUNT_2 • paramValue = 10e6 13. Call GPCTR_Control with the foll owing parameters: • deviceNumber = the device number of t ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 37

    © National Instruments Corporation 37 NI 4070/4072 Calibration Procedure V erifying Capacitance and Inductance (NI 4072 Only) This verification procedure only appl ies to the NI 4072 and requires additional test equi pment, as indicated i n the Additional Requirements for the NI 4072 section. Note The NI 4072 inductance accuracy is theore tically ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 38

    NI 4070/4072 Calibrati on Procedure 38 ni.com To verify the capacitance measuremen ts of the NI 4072, complete the following steps: 1. Disconnect any f ixt ures or cables from the NI 4072. 2. Call niDMM_reset to reset the NI 4070/4072 to a known state. 3. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_CAPA ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 39

    © National Instruments Corporation 39 NI 4070/4072 Calibration Procedure 11. Call niDMM_ConfigureMeasurement with t he follo wing parameters: • Function = NIDMM_VAL_CAPACITANCE • Range = 300e-12 • Resolution = 50e-15 12. Set the number of av erages of the NI 4072 to 20 b y calling niDMM_SetAttributeViInt32 with the following parameters: • ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 40

    NI 4070/4072 Calibrati on Procedure 40 ni.com 19. Set the number of av erages of the NI 4072 to 20 by calling niDMM_SetAttributeViInt32 with the following parameters: • Attribute_ID = NIDMM_A TTR_LC_NUMBER_MEAS_TO_AVERAGE • Attribute_V alue = 20 Note If you use capacitance verifi cation v alues that differ from the values listed in T able 10, v ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 41

    © National Instruments Corporation 41 NI 4070/4072 Calibration Procedure Adjustment Procedures This section explains how to adjust the NI 4070/ 4072. You can choose to perform these adjustment procedures with or without perfo rming the verification procedures first. The parameters Range , Resolution , Expected Measurement , and Frequency used in f ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 42

    NI 4070/4072 Calibrati on Procedure 42 ni.com Adjusting DC V oltage and Resistance To adjust the DC voltage and resistance of the NI 4070/4072, complete the following steps: 1. Fasten the connectors on one end of the Fluke 5440 cable to the appropriate banana plug connectors on the NI 4070/40 72, and fasten the connectors on the other end of the ca ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 43

    © National Instruments Corporation 43 NI 4070/4072 Calibration Procedure 10. Call niDMM_CalAdjustGain with the following parameters: • Mode = NIDMM_VAL_DC_VOLTS • Range = 10 • Input Resistance = NIDMM_VAL_GREATER_THAN_1 0_GIGAOHM • Expected Measurement = 10 11. Output –10 V on the calibrator . 12. Call niDMM_CalAdjustGain with the follow ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 44

    NI 4070/4072 Calibrati on Procedure 44 ni.com 23. Output 0 Ω from the calibrator without external sense or 2-wire compensation. 24. 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 25. C ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 45

    © National Instruments Corporation 45 NI 4070/4072 Calibration Procedure 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 calibrator for 0 Ω 37. Call niDMM_CalAdjustOffset with the following parameter ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 46

    NI 4070/4072 Calibrati on Procedure 46 ni.com 46. Call niDMM_CalAdjustOffset with the following parameters: • Mode = NIDMM_VAL_4_WIRE_RES • Range = 10e3 • Input Resistance = NIDMM_VAL_RESISTANCE_NA 47. Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCAL_RREF . 48. Call niDMM_SelfCal to self-calibrate the NI 4070/4072. 49. Output 0 ? ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 47

    © National Instruments Corporation 47 NI 4070/4072 Calibration Procedure 58. Call niDMM_CalAdjustOffset with the following parameters: • Mode = NIDMM_VAL_2_WIRE_RES • Range = 1e6 • Input Resistance = NIDMM_VAL_RESISTANCE_NA 59. Call niDMM_CalAdjustOffset with the following parameters: • Mode = NIDMM_VAL_2_WIRE_RES • Range = 100e3 • Inp ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 48

    NI 4070/4072 Calibrati on Procedure 48 ni.com • If you are not performing addi tional adjustments, refer to on e of the following sections: – Verification Procedures — to verify your new calibration coef ficients before savi ng them to the EEPR OM – Completing the Adjustment Procedures —if you do not wa nt to verify the adjustments you ha ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 49

    © National Instruments Corporation 49 NI 4070/4072 Calibration Procedure 5. Refer to T able 12 for the appropriate parameter values as you complete the following steps: a. Output 0 V on the calibrator . b. C a l l niDMM_CalAdjustOffset with Mode set to NIDMM_VAL_AC_VOLTS and the remaining parameters as sho wn in T able 12 for the current iteration ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 50

    NI 4070/4072 Calibrati on Procedure 50 ni.com 7. Refer to T able 13 for the appropria te calibrator outputs and parameter v alues as you complete the following steps: a. On the calibrator , output the value listed in the Calibrator Output column in T abl e 13 for t he current iteratio n. b. C a l l niDMM_CalAdjustACFilter with Mode set to NIDMM_VAL ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 51

    © National Instruments Corporation 51 NI 4070/4072 Calibration Procedure 10 500 mV 5 NIDMM_VAL_AC_VOLTS 0.5 5e3 500 mV 5 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0.5 5e3 11 500 mV 20 NIDMM_VAL_AC_VOLTS 0.5 20e3 500 mV 20 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0.5 20e3 12 500 mV 50 NIDMM_VAL_AC_VOLTS 0.5 50e3 500 mV 50 NIDMM_VAL_AC_VOLTS_DCCOUPLED 0.5 50e3 13 500 mV 100 ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 52

    NI 4070/4072 Calibrati on Procedure 52 ni.com 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_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_VOLT ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 53

    © National Instruments Corporation 53 NI 4070/4072 Calibration Procedure 9. Reset the calibrator for safety reaso ns. 10. Call niDMM_CalAdjustMisc with Type set to NIDMM_EXTCAL_MISCCAL_SECTION . Y ou hav e completed adjusting the AC voltage modes of the NI 40 70/4072. Select one of the follo wing options: • If you are performing additional adjus ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 54

    NI 4070/4072 Calibrati on Procedure 54 ni.com • If you skip this section and you want to verify the new calibration coef ficients before sa ving th em to the EEPR O M, repeat the Verification Procedures sectio n (except for Initial Setup ). • If you skip this section and you do not want to verify the new calibration coeff icients, go to the Com ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 55

    © National Instruments Corporation 55 NI 4070/4072 Calibration Procedure 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 calib rator . 13. Call niDMM_CalAdjustGain with the following parameters: • Mode = NIDMM_VA ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 56

    NI 4070/4072 Calibrati on Procedure 56 ni.com 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 ou tput set to NORM . 24. Call niDMM_CalAdjustOffset with the following pa ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 57

    © National Instruments Corporation 57 NI 4070/4072 Calibration Procedure ♦ If you are calibrating an NI 4072, you must complete this section to attain a valid calibration. Caution It is necessary to adjust DC v oltag e and resistance before running these adjustment steps. Du ring this procedure, be sure t o keep hands and any other moving object ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 58

    NI 4070/4072 Calibrati on Procedure 58 ni.com • T o finish the calibration and close the session, go to the Completing th e Adjustment Procedures section. Completing the Adju stment Procedures To complete the adjustment procedure for the NI 4070/4072 and close the session, call niDMM_CloseExtCal with the f ollowing parame ter: • Action = NIDMM_ ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 59

    © National Instruments Corporation 59 NI 4070/4072 Calibration Procedure AC Voltage –100 mV 100 mV >10 G Ω / 10 M Ω – 0.100006 V – 0.0999 94 V – 0.100002 V – 0.09 9998 V 1V 1V >10 G Ω / 10 M Ω 0 .999969 V 1.000031 V 0.999992 V 1.000008 V –1 V 1V >10 G Ω / 10 M Ω –1.00 0031 V – 0 .999969 V –1.00000 8 V – 0. 999992 ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 60

    NI 4070/4072 Calibrati on Procedure 60 ni.com 500 mV 100 kHz 500 mV AC /D C 0.4974 V 0.50 26 V 500 mV 300 kHz 500 mV AC /D C 0.48 475 V 0.51525 V 5V 30 Hz 5V DC 4.9945 V 5.0055 V 5V 50 Hz 5V AC / D C 4.9965 V 5.0035 V 5V 1k H z 5V AC / D C 4.9965 V 5.00 35 V 5V 1k H z 50 V AC/ DC 4.9875 V 5.0125 V 5V 1k H z 300 V AC / D C 4.9375 V 5. 0625 V 5V 20 k ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 61

    © National Instruments Corporation 61 NI 4070/4072 Calibration Procedure 4-Wire Resistance Note T olerances are provided for 4-wire resistan ce instead of absolute limits because the limits depend on the actual resistan ce v alue output by your calibrator . 2-Wire Resistance Note T olerances are provided for 2-wire resistan ce instead of absolute ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 62

    NI 4070/4072 Calibrati on Procedure 62 ni.com DC Current AC Current 100 k Ω 100 k Ω ±86 ppm ±17 ppm 10 k Ω 10 k Ω ±83 ppm ±14 ppm 1k Ω 1k Ω ±83 ppm ±14 ppm 100 Ω 100 Ω ±90 ppm ±25 ppm Table 19. NI 4070/4072 DC Current Verification Limits Calibrator Amplitude Range 2-Y ear Limits Lower Upper 0A 20 mA –1.5 μ A 1.5 μ A 0A 200 mA ? ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 63

    © National Instruments Corporation 63 NI 4070/4072 Calibration Procedure Frequency Capacitance and Inductance Note Because the actual capacitance verif ication values can dif fer from the following v alues, T able 22 provides tolerances th at correspond to the NI 4072 accuracy specifications Table 21. Frequency Limits NI 6608 Output Frequency 2-Y ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 64

    NI 4070/4072 Calibrati on Procedure 64 ni.com Appendix A: Calibration Options The complete calibration process for the NI 4070/40 72 consists of verifying, adjusting, and reverifying a de vice. During verification, you compare the measured performance to an external standard of known measurement uncertainty to confirm that the product meets or exce ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 65

    © National Instruments Corporation 65 NI 4070/4072 Calibration Procedure Table 23. Summary of Adjustment Options Adjustment Opt ional Required DC V oltage — Y Resistance — Y A C V oltage Y — AC / D C C u rr en t Y — Inductance and Capacitance (NI 4072 only) — Y ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 66

    NI 4070/4072 Calibrati on Procedure 66 ni.com Figure 4. V erification Procedures Flowchart V er ify C a p a cit a nce a nd Ind u ct a nce (NI 4072 Only)? V er ify DC V olt a ge Mode? V er ify AC V olt a ge Mode? V er ify 4-Wire Re s i s t a nce Mode? V er ify 2-Wire Re s i s t a nce Mode? V er ify DC C u rrent Mode? V er ify AC C u rrent Mode? V er ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 67

    © National Instruments Corporation 67 NI 4070/4072 Calibration Procedure Figure 5. Adjustment Procedures Flowchart Ye s Go to V er ification Procedures Flowchart V er ification Go to Adjusting DC V oltage and Resistance Go to Adjusting AC V oltage Modes No No Ye s Ye s No Go to Completing the Adjustment Procedures Adjust AC V oltage Modes? Adjust ...

  • National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - page 68

    National Instruments, NI, ni.com, and LabVIEW are tradem arks of National Instruments Corporation. Refer to t he Terms of Use section on ni.com/legal for more information a bout National Instruments trademarks. Other product and compan y names mentioned herein are trademarks or t rade names of their respective companie s . For patents covering Nati ...

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A complete manual for the device National Instruments NI 4070/4072 6 1/2-Digit FlexDMM, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use National Instruments NI 4070/4072 6 1/2-Digit FlexDMM by users. Manuals are usually written by a technical writer, but in a language understandable to all users of National Instruments NI 4070/4072 6 1/2-Digit FlexDMM.

A complete National Instruments manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual National Instruments NI 4070/4072 6 1/2-Digit FlexDMM - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the National Instruments NI 4070/4072 6 1/2-Digit FlexDMM, FAQ or common problems, i.e. places that are most often searched by users in each manual
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