doble SFRA, User Manual, Page: 46 / 126

Sweep Frequency Response Analyzer (SFRA) User Guide
3-22 72A-2570-01 Rev. K 07/2011
9. At the top of the Advanced Test Protocol section, click the option button
for
Expanded Range
or
Start: Stop: Step
and make the desired selections.
10. Click
Run Test
.
11. The instrument first runs four self-tests to assess the condition of the
setup. If it detects a problem, it may return one or more errors or warnings.
For more information, see
“Self-Test Error and Warning Messages”
on page 3-22 .
Self-Test Error and Warning Messages
The SFRA self-test can produce the following error and warning messages:
• Error 950—Internal temperature exceeds acceptable limits.
M5000 instruments are designed to operate in a 50° C/ 122° F
environment for extended periods. A high temperature may reduce
component life and instrument reliability. If error 950 occurs, turn the
instrument off and allow it to cool down before continuing the test.
• Error 951—Noise levels on the test leads exceed safe levels for the
instrument.
Excessive input noise may damage the instrument or
cause excessive noise in the results. If error 951 occurs, stop the test,
ground the bushing terminals momentarily to discharge stored energy,
and restart the test. You can continue the test without changing your
setup, but results may be noisy and in severe cases the instrument may
be damaged.
• Alert 952—Resistance between ground connections exceeds 1 ohm
and may be too high (
Figure 3.36 ).
Figure 3.36 Alert 952