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NI 9361 Calibration Procedure

Calibration Executive 4.0 Help

Edition Date: March 2017

Part Number: 374564H-01

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This topic contains information for calibrating the National Instruments 9361 using Calibration Executive.

Calibration Executive Procedure Features:

Adjustment

Unsupported
Manual Mode

Supported
Selectable Test Points

Unsupported

Approximate Test Time:

Warmup
30 minutes
Verify Only
5 minutes
Test Equipment | Test Conditions | Device Setup | Test Limit Equations

Test Equipment

The following table lists the test equipment required for calibrating NI 9361 modules.

Instrument Recommended Model Requirements
Frequency Standard Keysight 33250A A highly stable clock source that is able to generate 1 MHz, 5 V TTL output with ≤ ±5 ppm total accuracy
Chassis cDAQ-9178
Connection Accessory NI 9923

Test Conditions

The following setup and environmental conditions are required to ensure the NI 9361 meets published specifications.

  • Keep connections to the NI 9361 as short as possible. Long cables and wires act as antennas, picking up extra noise that can affect measurements.
  • Verify that all connections to the NI 9361 are secure.
  • Maintain an ambient temperature of 23 °C ±5 °C. The NI 9361 temperature will be greater than the ambient temperature.
  • Keep relative humidity below 80%.

Device Setup

  1. Make sure the cDAQ-9178 power source is not connected.
  2. Attach a ring lug to a 14 AWG (1.6 mm) wire. Connect the ring lug to the ground terminal on the side of the cDAQ-9178 using the ground screw. Attach the other end of the wire to the system safety ground.
  3. Install the module in slot 8 of the cDAQ-9178 chassis. Leave slots 1 through 7 on the chassis empty.
  4. Connect the cDAQ-9178 chassis to your host computer.
  5. Connect the power source to the cDAQ-9178 chassis.
  6. Configure the hardware using Measurement & Automation Explorer (MAX).
  7. Launch the Calibration Executive procedure and complete the setup wizard.

Test Limit Equations

The following test limits are derived from the published specifications found in the NI 9361 Calibration Procedure.

Verifying Base Clock Accuracy

Accuracy = ± 50.0 ppm


 

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