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This topic contains information for calibrating the National Instruments NI 4050/4060 using Calibration Executive.
Calibration Executive Procedure Features:
|Adjustment||Manual Mode||Selectable Test Points
Approximate Test Time: 100 minutes
The following table lists the test equipment required to calibrate the NI 4050/4060.
If this instrument is unavailable, use a high-precision voltage source that is four times as accurate as the analog-to-digital converter (ADC) on the device being calibrated—at least 10 ppm (0.001%) accuracy for DC voltage specifications.|
Do not calibrate these devices using a Fluke 55xxA calibrator. The AC voltage test requires an output of 219 V at 30 Hz, and the Fluke 55xxA calibrators cannot output this value. You must use only a Fluke 5700A/5720A.
|Use with PXI modules.|
|Note The Calibration Executive procedure runs in automated mode if you use IVI-supported instruments.|
For current measurements on the NI 4050, use an NI 4050 cable adapter and CSM-200 mA current shunt module, shown in the following figure.
|Note Current verification is optional.|
The following setup and environmental conditions are required to ensure the NI 4050/4060 meets published specifications.
To account for temperature changes, the tested specifications include the effects of temperature drift. For NI 4050/4060 DMMs, the following temperature drifts are valid:
To set up the NI 4050/4060 for calibration, complete the following steps:
|Note If the NI 4050/4060 fails after calibration, refer to the Troubleshooting Guidelines section. If the device still fails after you complete the troubleshooting procedures, return it to NI for repair or replacement.|
This section describes common problems you might encounter when calibrating an NI 4050/4060.
If the NI 4050/4060 is not recognized in MAX, make sure that you followed the configuration guidelines. If MAX fails to recognize the NI 4050/4060 after you reconfigure, contact National Instruments technical support.
If the NI 4050/4060 fails after calibration, try the following:
If the Average Reading falls outside the range of limits shown in the calibration report after you complete steps 1 and 2, contact National Instruments for repair or replacement. If the Average Reading falls within the limits, you can change the calibration report to indicate the passing value.
|Note If you have Microsoft Access 2000 or later installed on the computer, you can also modify the database containing the test results. By default, this database is located in Program Files\National Instruments\Calibration Executive\Databases\Calibration Reports.mdb.|
The following test limits are derived from the published specifications.
TestLimits = TestValue ± (TestValue * % of Reading + Offset µV)
TestLimits = TestValue ± (TestValue * % of Reading + Offset µA)
TestLimits = TestValue ± [TestValue * (% of Reading + Frequency dependent Error) + Offset mV]
TestLimits = TestValue ± [TestValue * (% of Reading + Frequency dependent Error) + Offset mA]
TestLimits = TestValue ± ( TestValue * % of Reading + Offset Ω )