[dsg-hallb_rich] [New Logentry] RICH Sector 1 gas system readout chassis replaced

[tlemon at jlab.org]

Logentry Text:
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RICH Sector 1 cooling air flow, cooling system buffer tank, and nitrogen purge flow reading dropped out (incorrectly read zero).

In the past a hard reboot of the system resolved the issue but the failure kept occurring after reboots.

The expansion gas system readout chassis that monitors those sensors was swapped out for a spare, resolving the issue.

RICH S1 hardware interlocks are now back to normal operating conditions.

Marco Mirazita has turned HV and LV back on for the detector.

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4057396
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