SCXI-1102/B/C Calibration Procedure
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Test Equipment
NI recommends that you use the equipment in Table 1 to calibrate the
SCXI-1102/B/C. If these instruments are not available, use the
requirements listed in Table 1 to select a suitable substitute.
Test Conditions
Follow these guidelines to optimize the connections and the environment
during calibration:
•
Keep connections to the SCXI-1102/B/C as short as possible. Long
cables and wires can act as antennas, picking up extra noise and
thermal offsets that affect measurements.
•
Use shielded copper wire for all cable connections to the
SCXI-1102/B/C. Use twisted-pair wire to eliminate noise and thermal
offsets.
•
Maintain the ambient temperature between 18 °C and 28 °C.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of at least 15 minutes for the SCXI-1102/B/C
and 30 minutes for the DAQ device to ensure that the measurement
circuitry is at a stable operating temperature.
Table 1.
Test Equipment
Equipment
Recommended
Model
Requirements
Calibrator
Fluke 5700A
50 ppm
DAQ Device
NI 6281
16-bit minimum
DMM
NI 4070
6 1/2 digit, 15 ppm
Terminal Block
SCXI-1300
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