Keysight U1241B Guía Del Usuario Y Servicios página 67

Test Considerations
Error may be induced by AC signals that present on the input leads. Long test
leads can also act as an antenna causing pick-up of AC signals.
For optimum performance, all procedures should comply with the following
recommendations:
– Ensure that the calibration ambient temperature is stable and between 18 °C
– Ensure that the ambient relative humidity (RH) is less than 80%.
– Ensure that the low battery indicator does not appear during the performance
– During temperature performance verification test, ensure that the multimeter
– Allow one minute warm-up period with a Shorting Plug connected to the V
– Use shielded twisted pair PTFE-insulated cables to reduce settling and noise
– Connect the input cable shields to earth ground. Except where noted in the
During DC voltage, DC current, and resistance gain verification measurements,
ensure that the calibrator's "0" output is correct. It is recommended to set the
offset for each range of the measuring function being verified.
Keysight U1241B and U1242B User's and Service Guide
and 28 °C. Ideally the calibration should be performed at 23 °C ± 2 °C.
verification test. If it does, replace the batteries to avoid any inaccurate
reading.
has been switched ON and placed in the test environment for at least one hour
with J/K-type thermo-couple connected between the multimeter and
calibration source.
and COM input terminals.
errors. Keep the input cables as short as possible.
procedures, connect the calibrator LO source to earth ground at the calibrator.
It is important that the LO to earth ground connection be made at only one
place in the circuit to avoid ground loops.
Performance Tests and Calibration 5
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