PXIe-4480/4481 Calibration Procedure

Calibration Executive 5.0 Help

Edition Date: June 2019

Part Number: 374564R-01

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This topic contains information for calibrating the National Instruments PXIe-4480 and PXIe-4481 using Calibration Executive.

Calibration Executive Procedure Features:

Adjustment

Supported
Manual Mode

Supported
Selectable Test Points

Unsupported

Approximate Test Time:

Module Warmup Verify Only Verify & Adjust
PXIe-4480 15 minutes 20 minutes 35 minutes
PXIe-4481 15 minutes 10 minutes 20 minutes
Test Equipment|Test Conditions|Device Setup|Test Limit Equations

Test Equipment

The following table lists the test instruments required for calibrating the PXIe-4480/4481.

Instrument Recommended Model Specification Value
Calibrator Fluke 5700A AI Gain Frequency Range: 40 Hz to 200 kHz

Voltage Range: up to 6.3 Vrms

ACV Accuracy:
40 Hz: 0.017%
1 kHz: 0.016%
20 kHz: 0.017%
50 kHz: 0.037%
100 kHz: 0.086%
200 kHz: 0.32%
Function Generator Keysight (Agilent) 33250A series Timebase Frequency Frequency Range: up to 90 kHz

Frequency Accuracy: 2 ppm

Voltage Range: up to 9 Vpk
Digital Multimeter* PXI-4070 IEPE Current Current Accuracy: 0.9%
InfiniBand 12X-6BNC Cable National Instruments SHB12X-6BNC All
BNC shorting cap (x6) Pomona Electronics 5085 or 3840-50 AI Offset Resistance: ≤50 Ω
BNC (F)-to-banana plug adapter Pomona Electronics 1269 AI Gain
BNC (M) cable (x11) Pomona Electronics 5697 AI Gain Characteristic Impedance: 50 Ω
BNC F-F-F T-connector (x5) Pomona Electronics 3284 AI Gain Characteristic Impedance: 50 Ω
Calibration capacitor* Meggitt Endevco 2947C Charge Gain 1000 pF 1% C0G, calibrated to 0.1%
10-32 (M)-to-BNC (M) interface cable* PCB Piezotronics 002C03 Charge Gain
*   The DMM, calibration capacitor, and 10-32 (M)-to-BNC (M) interface cable are required only for the PXIe-4480 module.

Test Conditions

The following setup and environmental conditions are required to ensure the PXIe-4480/4481 meets published specifications.

  • Keep connections to the device 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 device are secure.
  • Maintain an ambient temperature of 23 °C ±5 °C. The device temperature will be greater than the ambient temperature.
  • As Found Test Limits are valid for a device temperature within ±5 °C of the last self-calibration.
  • Keep relative humidity below 80%.
  • Allow a warm-up time of at least 15 minutes to ensure that the measurement circuitry of the PXIe-4480/4481 is at a stable operating temperature.
  • Allow a warm-up time for all of the instruments and equipment according to the manufacturer instructions.

Device Setup

  1. Install the hardware as described in the NI PXIe-4480/4481 Getting Started Guide.
  2. Configure the hardware using Measurement & Automation Explorer (MAX).
  3. Launch the Calibration Executive procedure. Calibration Executive guides you through the required connections.

Test Limit Equations

The following test limits are derived from the published specifications.

Voltage Gain Accuracy

Voltage Gain Accuracy Limits (Vrms) = Amplitude (Vrms) × 10±(Voltage Gain Amplitude Accuracy (dB) / 20)



Voltage Gain Flatness

Voltage Gain Flatness Limits (Vrms) = Amplitude (Vrms) × 10±(Voltage Gain Flatness (dB) / 20)



Charge Gain Accuracy (PXIe-4480 only)

Limits (uCrms) = Amplitude (Vrms) × Capacitance (uF)* × 10±(Charge Gain Accuracy (dB) / 20)

* The capacitance is the actual measured capacitance of the calibration capacitor used for this test.



Timebase Accuracy

Timebase Frequency Limits (Hz) = Timebase Accuracy (ppm) × Test Value (Hz) / 106

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