Teledyne DA1855A, Operator'S Manual

Page: 62 / 94

DA1855A Differential Amplifier
56 922258-00 Rev A
Performance Verification
This procedure can be used to verify the warranted characteristics of the DA1855A Differential
Amplifier.
The recommended calibration interval for this Differential Amplifiers is one year. The complete
performance verification procedure should be performed as the first step of annual calibration. Test
results can be recorded on a photocopy of the Test Record provided in Appendix A.
Performance verification can be completed without removing the instrument covers or exposing you
to hazardous voltages. Adjustment should only be attempted if a parameter measured in the
Performance Verification Procedure is outside of the specification limits.
Adjustment should only be performed by qualified personnel. Removing the covers from the
instrument may alter critical compensation adjustments, requiring the instrument to be
recalibrated. Re-establishing these adjustments requires the use of special calibration fixtures.
Therefore, never remove the covers. The Adjustment Procedure is contained in the Service Manual.
Test Equipment Required
The following table lists the test equipment and accessories, or their equivalents, which are required
for performance verification of the DA1855A.
This procedure has been developed to minimize the number of parameters required to be calibrated
in the test instrumentation.
Only the parameters listed in boldface in the Minimum Requirements column must be calibrated to
the accuracy indicated. Because the input and output connector types may vary on different brands
and models of test instruments, additional adapters or cables may be required.