SUPER-DAQ Precision Temperature Scanner
Test Considerations
7
Test Considerations
For optimum performance, all test procedures should comply with these
recommendations:
• Assure the calibration ambient temperature (T
cal
) is stable and between 18 °C
and 28 °C. Ideally, the calibration should be done at 23 °C ±2 °C.
• Assure ambient relative humidity is <80 %.
• Allow a 60-minute warm-up period.
• Use shielded twisted-pair PTFE-insulated cables to reduce settling and noise
errors.
• Keep all input cables as short as possible.
• Ensure that the calibration standards and test procedures used do not
introduce additional errors.
Note
Ideally, the standards used to verify and adjust the Product should
be four times more accurate than each full-scale error specification
of the Product.
• User the Fluke low-thermal 4-Wire short for all voltages and Ohm shorts. See
Table 2 for Fluke part number.
Performance Tests
This section provides performance tests to verify that the Product operates within
published specifications as well as a complete calibration adjustment procedure.
The performance test and, if necessary, the calibration procedure can be done
both periodically and after service or repair.
The performance tests can be used as an acceptance test upon receipt of the
Product. Use the 90-day specifications when an acceptance test is done after the
Product is calibrated.
These performance tests are provided to ensure that the Product is in proper
operating condition. If the Product fails any of the performance tests, calibration
adjustment and/or repair is needed. The performance test works best if done in
the sequence shown in Table 3.
Each of the measurements listed in the following tests assumes the Product is
being tested after a one-hour warmup in an environment with an ambient
temperature of 18 °C to 28 °C and a relative humidity of <80 %.
Note
All instrument settings for verification use power up conditions
except as noted by the verification step.
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