Page 90 - GuardII+ Series 4208 Platform PD User Manual

Troubleshooting

Figure 7-17 Connect SSC Tester to LV Synchronization
Once the alternate source is connected to the synchronization input, use IAM to run
measurements on each PD input.
• If the measurements fail due to lack of synchronization, this indicates a problem with
the Carrier Board; contact Iris Power LP Technical Support for assistance.
NOTE:
If the measurements succeeded with the alternate synchronization source,
we have proven that the monitor is working; the problem is with the
external reference source.
If Iris Power LP did not supply the external reference hardware for this
installation, then troubleshooting this source may not fall within Iris Power
LP’s scope of responsibility.

Use a voltmeter to measure the voltage and frequency at the end of the BNC cable from
the external reference. Verify that the signal voltage and frequency are correct; this can vary
from installation to installation.
• If the signal voltage and/or frequency are not correct, this indicates a problem with the
external reference source; contact Iris Power LP Technical Support for assistance
The remaining possible cause for the synchronization problems is electrical noise on the
synchronization signal. While GuardII+ has built-in filters for eliminating synchronization
noise, there may be cases where there is noise that the filter does not remove. At this point,
you will need to contact Iris Power LP Technical Support, but additional information will be
helpful.
• Examine the synchronization signal using an oscilloscope. Once the traces are
acquired, send copies of them to Iris Power LP Technical Support.

7.3.5. AC Power-Based Synchronization

The likely cause of an ac synchronization problem when using the ac power as a source
is the GuardII+ hardware; either the AC Termination Board or the Carrier Board, but it could
be noise on the ac power source. While GuardII+ has built-in filters for eliminating
synchronization noise, there may be cases where there is noise that the filter does not remove.

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