Vega DSGH, Operating Instructions Manual

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76 DSGH Installation and Operation Guide
Diagnostics and repair
• Trip the output relay, if it is configured to do so
The gauge enters the x-ray alarm condition when it detects a radiation field
above a set threshold. The gauge sets the current loop output at its value
10 seconds before the condition. It periodically dithers the output about the
average, cycling until the radiation field is back to the normal density or until
a time-out period of 60 minutes.
The standard x-ray alarm only triggers when the counts are greater than the
Cal Low count value. These counts are found on the process variable
menu. If the x-ray source is configured so the counts increase but do not
exceed the Cal Low counts, the x-ray alarm does not trigger and the gauge
reads the x-ray interference as a true process shift.
Note: Excessive radiation fields at the detector can permanently
damage the gauge. The device has a protection feature that
safeguards against excessive radiation fields. The procedure for
activating this protection is firmware dependent. Please consult
the factory to activate this feature on your device.