Calibration Procedures 1
Test Considerations
U1231A/U1232A/U1233A Service Guide 7
Test Considerations
For optimum performance, all procedures should comply
with the following recommendations:
• The performance verification test or adjustment should be
performed under a laboratory condition, where the
ambient temperature can be controlled.
• Ensure that the calibration ambient temperature is stable
and is between 18 °C and 28 °C. Ideally the calibration
should be performed at 23 °C ± 1 °C.
• Ensure that the ambient relative humidity is less than
80%.
• The instrument should be in the laboratory environment
for at least 1 hour prior.
• Allow a warm- up period of 3 minutes.
• Use shielded twisted- pair PTFE- insulated cables to reduce
settling and noise errors. Keep the input cables as short
as possible.
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