Analog Alarm - Vega FiberFlex LFXG-H Operating Instructions Manual

Table 5.3 Diagnostic alarm conditions (continued)
Diagnostic check
and Normal/Error
conditions
New hardware
found? – No/Yes
Process out of
range? – No/Yes
X-Ray Alarm – No/
Yes

Analog alarm

If the current loop output (analog output) is stable at 2 mA or 22 mA, the
analog alarm is set.
The analog alarm is set when the counts from the detector falls below a set
threshold, indicating that the detector is not outputting enough counts to
make a meaningful measurement. This is known as 0 counts.
If the analog alarm is on, verify:

Source holder shutter is in the On or Open position to create the
required radiation field.

Extreme build-up on walls or other material shielding the detector from
the radiation field.

Damage or disconnection of electrical connections from the sensor
assembly to the CPU board.
LFXG-H Installation and Operation Guide
HART message
Diagnostic description
New hardware found – The
CPU board detects a
configuration mismatch. The
CPU board or sensor
assembly may have been
replaced, or one of the
EEPROM configurations is
erroneous.
Process out of measurement
range – The current process
value is not within the limits
set by the Max level and Min
level in the gauge span
settings.
Note that there are high levels
of x-ray in your area that may
be affecting process
measurement.
Diagnostics and repair
Action
Contact VEGA Field
Service. See 26.
Call VEGA Field
Service.
Contact VEGA for
further information.
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