42 U1241A/U1242A User’s and Service Guide
5 Performance Tests and Calibration
Input Connections
Test connections to the meter are best accomplished using the K- type
thermocouple wire and mini- connectors for temperature measurement. The
J- type thermocouple wire and mini- connectors can also be used for
temperature measurements (for U1242A). Shielded, twisted- pair, PTFE
interconnect cables of minimum length are recommended between the
calibrator and the meter. Cable shields should be earth ground referenced.
This configuration is recommended for optimal noises and settling time
performance during calibration.
Performance Verification Tests
The performance verification tests are recommended as acceptance tests
when you first receive the meter. The acceptance test results should be
compared against the one year test limits. After acceptance, you should
repeat the performance verification tests at every calibration interval.
If the meter fails performance verification, adjustment or repair is
required. Adjustment is recommended at every calibration interval. If no
adjustment is being performed, it is highly recommended to establish a
‘guard band’, using not more than 80% of the specifications, as the verifi-
cation limits.
Users are highly recommended to read the Test Considerations before performing
performance verification tests.
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