Agilent Technologies 1141A, Руководство пользователя и сервисное руководство

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28 1141A and 1142A User’s Guide
2 Calibrating the Probe
Once the probe tip caps and probe tips have been removed, the
probe can be connected to the test board in one of three ways, as
shown in the figure below. At each position of the probe, probe
inputs are connected to a different combination of signal and
ground. A separate terminal on the test board connects the ground
of the probe to the signal ground.
Figure 10 Test Board Showing Probe Positions
Testing Interval
The calibration testing procedures may be performed for incoming
inspection of the instrument and should be performed periodically
thereafter to ensure and maintain peak performance. The
recommended test interval is yearly or every 2,000 hours of
operation. Amount of use, environmental conditions, and the user’s
experience concerning need for testing will contribute to
verification requirements.
Calibration Test Record
The results of the calibration tests may be tabulated in the
Calibration Test Record provided at the end of the calibration tests.
The Calibration Test Record listed the calibration tests and
provides an area to mark test results. The results recorded in the
Calibration Test Record during initial inspection may be used for
later comparisons of the tests during periodic maintenance,
troubleshooting, and after repairs or adjustments.
Calibration Test Procedures
Procedures may be done individually or in any order.
NOTE
Allow the instrument to warm up for at least 30 minutes prior to beginning
calibration tests.