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

DCI Characterization for the NI 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 characterizing DC current output for the National Instruments PXI-4071 at ±100µA and ±1mA. This process uses the Agilent 3458A in series with the PXI-4071 device to determine the value of the calibrator current output at ±100µA and ±1mA during the DC current verification test in Calibration Executive.

Test Equipment| Preliminary Requirements| Programming Hotkeys| Verification Procedure| Adjustment| Re-Verification| Related Documents

Test Equipment

The following table lists the test equipment required for this procedure.

Equipment Recommended Model Specification
Calibrator Fluke 5720A/5730A Used as current source only.
DMM Agilent 3458A See specification in the NI 4071 Calibration Procedure.
Low Thermal Test Leads (x3) Fluke 5440A-7002

Preliminary Requirements

The following setup and environmental conditions are required.

  • Disconnect the GPIB cable from the Agilent 3458A and configure it as an "Unsupported Instrument" on the Calibration Executive Required Standards screen.
  • Power on and warm up both the Fluke 5720A/5730A and the Agilent 3458A, and allow for the appropriate warm-up time (Fluke 5720A/5730A: 30 minutes, Agilent 3458A: 4 hours).
  • Check to see if Hotkeys have been programmed. Press [F0] and [ENTER] and read the display.

Programming Hotkeys on the Agilent 3458A

Use the following steps to program shortcuts for Current Temp, TCAL, ACAL, and ranges.

Program a shortcut for Current Temp

  1. Press [0] on the keypad. The display reads DEFKEY F0.
  2. Press the [Blue] button in the Function/Range area.
  3. Press the [Recall State] button to display the menu.
  4. Use the [Up/Down] arrow buttons to scroll the menu to TEMP?.
  5. Press [Enter].

The F0 key now shows the Current Temp on the Agilent 3458A in Celsius.

Program a shortcut for Last Adjustment Temp (TCAL)

  1. Press [1] on the keypad. The display reads DEFKEY F1.
  2. Press the [Blue] button in the Function/Range area.
  3. Press the [Auto CAL] button to display the menu.
  4. Use the [Up/Down] arrow buttons to scroll the menu to CAL.
  5. Press the [Down] arrow to place the ?.
  6. Press the [Right] arrow key to move the display over.
  7. On the keypad, press [5] [9].
  8. Press [Enter].

The F1 key now shows the Last Adjustment Temp on the Agilent 3458A in Celsius.

Program a shortcut for Last Auto Cal Temp (ACAL)

  1. Press [2] on the keypad. The display reads DEFKEY F2.
  2. Press the [Blue] button in the Function/Range area.
  3. Press the [Auto CAL] button to display the menu.
  4. Use the [Up/Down] arrow buttons to scroll the menu to CAL.
  5. Press the [Down] arrow to place ?.
  6. Press the [Right] arrow key to move the display over.
  7. On the keypad, press [1] [7] [5].
  8. Press [Enter].
  9. The F2 key now shows the Last Auto CAL Temp on the Agilent 3458A in Celsius.

Program shortcuts for appropriate ranges

  1. Press [3] on the keypad. The display reads DEFKEY F3.
  2. Press the [Blue] button in the Function/Range area.
  3. Press the [Auto Cal] button to display the menu.
  4. Use the [Down] arrow to scroll to DCI.
  5. Use the [Right] arrow to move cursor.
  6. On the keypad, press [1] [0] [0] [E] [-] [6] [Enter] for the 100 µA range.
  7. Press [4] on the keypad. The display reads DEFKEY F4.
  8. Press the [Blue] button in the Function/Range area.
  9. Press the [Auto Cal] button to display the menu.
  10. Use the [Down] arrow to scroll to DCI.
  11. Use the [Right] arrow to move the cursor.
  12. On the keypad, press [1] [E] [-] [3] [Enter] for the 1mA range.

Verification Procedure

  1. Begin the 4071 Procedure in Calibration Executive.
  2. At the beginning of the 2-Wire Resistance test, during the thermal wait period, perform the following:
    1. Press F0 and <Enter> to verify the Current Temp.
    2. Press F1 and <Enter> to verify that the Adjustment Temp (TCAL) is <5 ° from the Current Temp.
    3. Press F2 and <Enter> to verify that the Auto Cal Temp (ACAL) is <1 ° from the Current Temp.
      Note Note  If Auto Cal has not been performed in the last 24 hours, or if the ACAL is >1° from the Current Temp, press [Auto Cal], and ensure that all cables are removed from the Agilent 3458A DMM.
  3. Set the NPLC on the Agilent 3458A to 100:
    1. Press the [NPLC] button.
    2. On the keypad, press [1] [0] [0].
    3. Press [Enter].
  4. Proceed/Finish with 2-Wire Ohms testing.
  5. When Calibration Executive prompts you to enter the characterized value for the 100µA, place the Fluke 5720A/5730A into standby mode:
    1. Press the [Local] button.
    2. Once the calibrator is in local mode, press the [OPR/STBY] button to place it in standby mode.
  6. Press F3, then [ENTER] on the 3458A to set range to 100 µA DCI.
  7. Connect the PXI-4071 with the DMM and calibrator as shown in the following diagram. Connection diagram: PXI-4071, Agilent 3458A, and Fluke 5720A
  8. Enable the calibrator output by pressing [OPR/STBY] button.
  9. Enter the DMM indication for 100 µA DCI in the Characterized Output Value field at the Calibration Executive prompt.
  10. Click Continue at the Calibration Executive prompt.
  11. Enter the DMM indication for -100 µA DCI in the Characterized Output Value field at the Calibration Executive prompt. (DO NOT CLICK CONTINUE.)
  12. Press F4, then [ENTER] on the 3458A to change to the 1 mA range.

    This ensures the DMM does not OVERRANGE when Calibration Executive changes the calibrator output after taking the measurement.

  13. Click Continue at the Calibration Executive prompt.
  14. Enter the DMM indication for 1 mA DCI in the Characterized Output Value field at the Calibration Executive prompt.
  15. Click Continue at the Calibration Executive prompt.
  16. Enter the DMM indication for -1 mA DCI in the Characterized Output Value field at the Calibration Executive prompt.
  17. Click Continue at the Calibration Executive prompt.
  18. After the -1 mA value has been entered, remove connections from the DMM.
  19. Connect the PXI-4071 to the calibrator as shown in prompt, and continue the Calibration Executive procedure.

DC Current Characterization for Adjustment

To perform a DC current characterization for an adjustment, repeat steps 5—20 of the Verification Procedure.

DC Current Characterization for Re-verification

To perform a DC current characterization for re-verification, repeat steps 5—20 of the Verification Procedure.

Related Documents

Metrology Quality Manual

Agilent 3458A Operators Manual

Fluke 5700A Operators Manual


 

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