NI PXIe-4081, Calibration Manual

Page 1: ...ocedures 3 Initial Setup 3 Test Conditions 4 As Found and As Left Limits 4 Verification 5 Verifying DC Voltage 5 Verifying AC Voltage 7 Verifying 4 Wire Resistance 9 Verifying 2 Wire Resistance 11 Ver...

Page 2: ...ollowing table lists the equipment required for calibrating your device If you do not have the recommended instruments use these specifications to select a substitute calibration standard Equipment Re...

Page 3: ...r to calibration Adjustment Procedures Perform an external adjustment of the device that adjusts the calibration constants with respect to standards of known values Reverification Repeat the verificat...

Page 4: ...imes Clean any oxidation from the banana plugs on the cables before plugging them into the binding posts of the calibrator or the connectors of the PXIe 4081 Oxidation tarnishes the copper plugs so th...

Page 5: ...he PXIe 4081 2 Wait two minutes for thermal EMF to stabilize 3 Reset the PXIe 4081 4 Initialize the PXIe 4081 for DC voltage with a range of 100 mV and resolution of 7 5 digits 5 Verify the accuracy f...

Page 6: ...MM Settings Calibrator Settings Range Input Resistance Range DCV Amplitude 100 mV 10 G 2 2 V 0 V 100 mV 10 M 2 2 V 0 V 12 Verify the accuracy for each configuration in the following table a Set the PX...

Page 7: ...erify any additional modes and you are performing a pre adjustment verification close the session If you do not want to verify any additional modes and you want to update the verification time stamp c...

Page 8: ...V 100 kHz 0 04984 0 05016 50 mV 300 kHz 0 049575 0 050425 500 mV DC 500 mV 30 Hz 0 499475 0 500525 AC DC 500 mV 50 Hz 0 499725 0 500275 500 mV 1 kHz 0 499725 0 500275 5 V 500 mV 1 kHz 0 4995 0 5005 50...

Page 9: ...ect one of the following options If you want to continue verifying other modes proceed to the Verifying 4 Wire Resistance section If you do not want to verify any additional modes and you are performi...

Page 10: ...n the following table a Acquire the measurement at each specified configuration b Compare to the specified tolerances Note Tolerances are provided instead of absolute limits because your calibrator wi...

Page 11: ...o the Verifying 2 Wire Resistance section If you do not want to verify any additional modes and you are performing a pre adjustment verification close the session If you do not want to verify any addi...

Page 12: ...ified tolerances DMM Settings Calibrator Settings Tolerances As Found As Left Range2 OCO Resistance External Sense Compensation ppm of Reading ppm of Range ppm of Reading ppm of Range 1 M Off 0 Off No...

Page 13: ...of Reading ppm of Range 10 k Off 10 k On 2 Wire 45 21 5 7 20 5 1 k Off 1 k On 2 Wire 45 201 5 7 200 5 100 Off 100 On 2 Wire 55 2012 9 2005 You have completed verifying the 2 wire resistance mode of t...

Page 14: ...the specified limits DMM Settings As Found Limits As Left Limits Lower Upper Lower Upper 1 A 0 120 nA 0 120 nA 0 060 nA 0 060 nA 10 A 0 45 nA 0 45 nA 0 06 nA 0 06 nA 100 A 2 0 nA 2 0 nA 1 0 nA 1 0 nA...

Page 15: ...figuration in the following table a Set the PXIe 4081 and the ammeter to the listed configuration and commit Configure the ammeter for a single acquisition b Set the Calibrator to the listed configura...

Page 16: ...own in the following figure Figure 5 DC Current Connection Configuration OUTPUT A SENSE AUX CURRENT V GUARD GROUND NI DMM Calibrator HI SENSE LO Not Connected HI LO V GUARD 9 Verify the accuracy for e...

Page 17: ...do not want to verify any additional modes and you are performing a pre adjustment verification close the session If you do not want to verify any additional modes and you want to update the verifica...

Page 18: ...89769 mA 0 90232 mA 10 mA 9 mA 1 kHz 8 99490 mA 9 00510 mA 100 mA 9 mA 1 kHz 8 9764 mA 9 0236 mA 100 mA 90 mA 55 Hz 89 9440 mA 90 0560 mA 100 mA 90 mA 5 kHz 89 9170 mA 90 0830 mA 100 mA 90 mA 1 kHz 89...

Page 19: ...he calibrator using low thermal EMF cables according to the configuration shown in Figure 1 on page 6 6 Wait two minutes for thermal EMF to stabilize 7 Adjust the voltage gain with each configuration...

Page 20: ...you do not use the resistance modes for any measurements or the accuracy of these modes is irrelevant you can skip this section and go directly to the Adjusting AC Voltages AC and DC coupled section C...

Page 21: ...PXIe 4081 to the specified range b Configure the calibrator as specified c Wait the specified settling time d Call niDMM Cal Adjust Gain VI or the niDMM_CalAdjustGain function with the specified param...

Page 22: ...andby 10 s 9 Output 0 on the calibrator with External Sense turned on and Compensation set to None 10 Call the niDMM Cal Adjust Offset VI or the niDMM_CalAdjustOffset function for each range in the fo...

Page 23: ...is irrelevant you can skip this section in the calibration procedure and go directly to the Adjusting Current Modes section Complete the following steps to adjust the AC voltage of the device 1 Reset...

Page 24: ...olts 50 mV 50 mV 1 kHz 5 kHz 20 kHz 50 kHz 100 kHz 200 kHz 300 kHz 500 kHz AC Volts 500 mV 500 mV 1 kHz 5 kHz 20 kHz 50 kHz 100 kHz 200 kHz 300 kHz 500 kHz AC Volts 5 V 5 V 1 kHz 5 kHz 20 kHz 50 kHz 1...

Page 25: ...lAdjustMisc function with Type set to NIDMM_EXTCAL_MISCCAL_VOLTAGE_AC_FILTER 7 Self calibrate the PXIe 4081 You have completed adjusting the AC voltage modes of the PXIe 4081 Proceed to one of the fol...

Page 26: ...current N A 1 A DC current N A 10 A 6 Connect the PXIe 4081 to the calibrator with the ammeter in series as shown in Figure 4 on page 15 7 Adjust the current gain with each configuration in the follow...

Page 27: ...ng the Adjustment Procedures section Completing the Adjustment Procedures To complete the adjustment procedure for the PXIe 4081 and close the session call the niDMM Close Ext Cal VI or the niDMM_Clos...

Page 28: ...upport outside the United States visit the Worldwide Offices section of ni com niglobal to access the branch office websites which provide up to date contact information support phone numbers email ad...