USB-5132/5133 Calibration Procedure

Calibration Executive 6.0 Help

Edition Date: July 2020

Part Number: 374564Y-01

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This topic contains information for calibrating the NI USB-5132/5133 using Calibration Executive.

Calibration Executive Procedure Features:

Adjustment

Supported
Manual Mode

Supported
Selectable Test Points

Unsupported

Approximate Test Time: 40 minutes

Test Equipment|Test Conditions|Device Setup|Test Limit Equations

Test Equipment

The following table lists the test equipment required for calibrating the USB-5132/5133.

Required EquipmentRecommended EquipmentParameter MeasuredMinimum Requirements
Scope CalibratorFluke 9500B with
Fluke 9530 Test Head
DC Accuracy,
Adjustment
Output Range: 20 V to –20 V into 1 MΩ
DC Voltage Accuracy: DC ±0.3% of output into 1 MΩ
BandwidthOutput Range: 0.032 Vpp to 5.5 Vpp into 50 Ω
AC Voltage Accuracy: ±2% output amplitude flatness for leveled sine wave up to 50.1 MHz relative to 50 kHz into 50 Ω
Adjustment1 kHz square wave
Output Range: 1.65 Vpp to 8.5 Vpp into 1 MΩ
Rise Time: 20 ns to 150 ns
Timing Accuracy11 MHz sine wave
Output Range: 1 Vpp into 50Ω
Frequency Accuracy: ±4 ppm
DMMPXI-4071AC Amplitude AccuracyInput Range: 0.03 Vpp tp 25.0 Vpp
AC Voltage Accuracy: 0.3% of input at 50 kHz
Function GeneratorPXI-5421AC Amplitude Accuracy50 kHz sine wave
Amplitude Range: 0.036 Vpp to 24 Vpp into 1 MΩ
BNC T ConnectorAC Amplitude Accuracy50 Ω

Test Conditions

The following setup and environmental conditions are required to ensure the USB-5132/5133 meets published specifications.

  • Always connect the calibrator test head directly to the input BNC on the digitizer, or use a short 50 Ω BNC coaxial cable if necessary. Long cables and wires act as antennas, picking up extra noise that can affect measurement.
  • Keep relative humidity between 10 and 90% non-condensing, or consult the digitizer hardware specifications for the optimum relative humidity..
  • Maintain an ambient temperature of 23 ±5 °C.
  • Allow a warm-up time of at least 10 minutes after the NI-SCOPE driver is loaded. Unless manually disabled, the NI-SCOPE driver automatically loads with the operating system and enables the device. The warm-up time ensures that the measurement circuitry of the USB-5132/5133 is at a stable operating temperature.
  • Install a heavy ground wire between the USB-5132/5133 ground lug and the signal source ground. Refer to the Ground Loop Noise topic in the NI High-Speed Digitizers Help for more information.

Device Setup

  1. Connect the USB-5132/5133 to the host PC according to the instructions in the NI High-Speed Digitizers Getting Started Guide.
  2. Configure the hardware using Measurement & Automation Explorer (MAX).
  3. Launch the Calibration Executive procedure and complete the setup wizard.
Note Note  If the USB-5132/5133 module fails after calibration, return it to NI for repair or replacement.

Test Limit Equations

The following test limits are derived from the published specifications.

Vertical Offset

TestLimits = TestPoints ± (2% of input + 1% FS + 300 µV)

Vertical Gain

TestLimits = ± 2% (Error)

Error = [(measured positive voltage – measured negative voltage) / (applied positive voltage – applied negative voltage)] * 100

Programmable Vertical Offset

40 mV Range

TestLimits = ± 5% (±2mV)

All Other Ranges

TestLimits = ± 2.5%

AC Amplitude Accuracy

TestLimits = ±2% (Error)

Error = [(measured RMS voltage of 50 kHz sine wave – DMM measured RMS voltage of 50 kHz sine wave) / DMM measured RMS voltage of 50 kHz sine wave] * 100

Timing Accuracy

TestLimits = ±50 ppm

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