Test Conditions - National Instruments SCXI-1121 Calibration Procedure

Test Conditions

Calibration
© National Instruments Corporation
Follow these guidelines to optimize the connections and environment
during calibration:
• Keep connections to the SCXI-1121 module short. Long cables and
wires act as antennae, picking up extra noise and thermal offsets that
can affect measurements.
• Use shielded copper wire for all cable connections to the device.
Use twisted-pair wire to eliminate noise and thermal offsets.
• Maintain the temperature between 18–28 °C.
• Keep relative humidity below 80%.
• Allow a warm-up time of at least 15 minutes for the SCXI-1121
module to ensure the measurement circuitry is at a stable operating
temperature.
The calibration procedure for the SCXI-1121 module consists of the
following steps:
1. Setting up the module for testing.
2. Verifying the existing operation of the module to determine whether it
is operating within its specifications.
3. Adjusting the module with respect to a known voltage source.
4. Verifying that the module is operating within its specifications after
adjustments.
3 SCXI-1121 Calibration Procedure