Company Events Academic Community Support Solutions Products & Services Contact NI MyNI

PXI-4071 Calibration Procedure

Calibration Executive 4.0 Help

Edition Date: March 2017

Part Number: 374564H-01

»View Product Info
Download Help (Windows Only)

This topic contains information for calibrating the National Instruments PXI-4071 using Calibration Executive.

Calibration Executive Procedure Features:

Adjustment

Supported
Manual Mode

Supported
Selectable Test Points

Supported

Approximate Test Time: 180 minutes

Test Equipment| Test Conditions| Device Setup| Troubleshooting Guidelines| Test Limit Equations
Note Note  For a list of the TestLimits used in this calibration procedure, refer to the NI 4071 7½-Digit FlexDMM Calibration Procedure, available at ni.com/manuals or ni.com/calibration.

Test Equipment

The following table lists the test equipment required to calibrate the PXI-4071.

InstrumentRecommended ModelRequirements
Calibrator Fluke 5720A/5730A* You must use a Fluke 5720A/5730A to calibrate PXI-4071 modules. Do not use a Fluke 5500A/5520A/5522A calibrator. The Fluke 5720A/5730A multifunction calibrator must be within the 90 day calibration interval.
DMM Agilent 3458A ±(ppm of reading + ppm of range)

± 100 µA = ±(25 + 8)

± 1 mA = ±(25 + 5)

Function Generator Agilent 33250A Use a function generator with a timebase accuracy of 25 ppm or better and a frequency range of 1 Hz to 500 kHz.
Cables Fluke 5440 low thermal electromotive
force (EMF) copper cables
Use two sets of low thermal electromotive force (EMF) copper cables.
Pomona B-4 banana-to-banana
patch cables
Use two banana-to-banana patch cables with length not to exceed 4 in.
Pomona 2249-C BNC Cable Use a 36 inch BNC cable to connect to the function generator.
Connection Accessory Pomona 1269 Use a BNC female to banana connector to connect the BNC cable to the PXI-4071.
Shorting Bar Pomona 5145 insulated double banana plug shorting bar Use to create a short (≤100 mΩ) with low thermal EMF (≤150 nV) across the HI and LO input banana plug connectors on the PXI-4071.
Binding Post Pomona 5405 Double banana plug with binding posts.
Spade Lug Pomona 2305 Use two Pomona 2305 insulated low thermal electromotive force (EMF) spade lugs.
Chassis PXI-1042,
PXI-1042Q
Use with PXI modules.
*  The Calibration Executive driver defaults to the Fluke 5725A Amplifier for values >1.9 A.

  The 90-day DC current uncertainty of the Fluke 5720A/5730A is not adequate to calibrate the four lowest DC current ranges on the PXI-4071. Refer to the to the NI 4071 7½-Digit FlexDMM Calibration Procedure for more information on the required uncertainty.

  The Agilent 3458A DMM is used to characterize the DC current output at ±100 µA and ±1mA. See DCI Characterization for the NI 4071 Calibration Procedure.

Note Note  You must characterize the Fluke 5720A/5730A calibrator output to better than published specifications. Refer to the NI 4071 7½-Digit FlexDMM Calibration Procedure for a characterization example.

Test Conditions

The following setup and environmental conditions are required to ensure the PXI-4071 meets published specifications.

  • Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters are clean, and that the empty slots contain filler panels.
  • Plug the PXI chassis or PC and the calibrator into the same power strip to avoid ground loops.
  • Power on and warm up both the calibrator and the PXI-4071 for at least 60 minutes before beginning this calibration procedure.
  • Maintain an ambient temperature of 23 ±1 °C.
  • Maintain an ambient relative humidity of less than 60%.
  • Keep a shorting bar connected between the v GUARD and GROUND binding posts of the calibrator at all times.
  • Clean any oxidation from the banana plugs on the Fluke 5440 cables before plugging them into the binding posts of the calibrator or the banana plug connectors of the PXI-4071. Oxidation tarnishes the copper banana plugs so that they appear dull rather than shiny and leads to greater thermal EMF.
  • Keep the blue banana plugs on the Fluke 5440 cables connected to the v GUARD binding post of the calibrator at all times.
  • Prevent the cables from moving or vibrating by taping or strapping them to a nonvibrating surface. Movement or vibration causes triboelectric effects that can result in measurement errors.

Device Setup

Caution Caution  Voltages as high as 1,000 V can occur during this procedure. Do not touch the calibrator connections during voltage output.

To set up the PXI-4071 for calibration, complete the following steps:

  1. Install the PXI-4071 in the PXI chassis or the PC according to the instructions in the NI Digital Multimeters Getting Started Guide.
  2. Configure the hardware using Measurement & Automation Explorer (MAX).
  3. Launch the Calibration Executive procedure and complete the setup wizard.
Caution Caution  If you abort the PXI-4071 procedure during Self Calibration or Adjustment, you must run cleanup. Do not kill the process. This is necessary to avoid damaging the PXI-4071.
Note Note   If the PXI-4071 fails after calibration, refer to the Troubleshooting Guidelines. If the device still fails after you complete the troubleshooting procedures, return it to NI for repair or replacement.

Troubleshooting Guidelines

Error Code –1074118135

(Error Message: Invalid leakage resistance, contact National Instruments for assistance) This error can occur during adjustment when the NI DMM circuitry is too hot. Make sure you follow the instructions in the Test Conditions section to maintain a proper test environment

Error Code –300300

Version 2.7.0 of NI-DMM is not compatible with Calibration Executive. You must install a different version of this driver in order to run Calibration Executive.

Other Issues

If the PXI-4071 is not recognized in MAX, make sure that you followed the configuration guidelines. If MAX fails to recognize the PXI-4071 after you reconfigure, contact National Instruments technical support.

If the PXI-4071 fails after calibration, try the following:

  1. Check the connections and run the Calibration Executive procedure again.
  2. If the calibration still fails after trying step 1, try verifying the failed Test Points using the DMM Soft Front Panel (SFP), which is located at Start»All Programs»National Instruments»NI-DMM»NI-DMM Soft Front Panel. For example, if the analog input (AI) failed at 10.00 VDC, input that value from the calibrator.
    1. Launch the DMM SFP.
    2. Using the controls on the DMM SFP, select the appropriate mode and range as follows:
      • mode: V DC
      • range: 10.00 V
    3. Check the reading on the display.

If the 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 reading falls within the limits, you can change the calibration report to indicate the passing value.

Note 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.

Test Limit Equations

The following test limits are derived from the published specifications.

Note Note  All DC voltage accuracy specifications apply to 7½-digit resolution, Auto Zero and ADC calibration enabled. All DC current specifications apply to 6½-digit resolution, Auto Zero and ADC calibration enabled. All resistance specifications apply to 7½-digit resolution, Auto Zero and ADC calibration enabled. All AC accuracy specifications apply to 6½-digit resolution, signal amplitudes greater than 1% of range, and Auto Zero enabled.


DC Voltage

TestLimits = TestValue ± (TestValue * ppm of reading + DMM Range * ppm of range)

DC Current

TestLimits = TestValue ± (TestValue * ppm of reading + DMM Range * ppm of range)

AC Voltage

TestLimits = TestValue ± (TestValue * % of reading + DMM Range * % of range)

AC Current

TestLimits = TestValue ± (TestValue * % of reading + DMM Range * % of range)

Resistance (4-Wire and 2-Wire)

TestLimits = TestValue ± (TestValue * ppm of reading + DMM Range * ppm of range)


 

Your Feedback! poor Poor  |  Excellent excellent   Yes No
 Document Quality? 
 Answered Your Question? 
Add Comments 1 2 3 4 5 submit