Ametek Land 4750-PM, User Manual

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User Guide 6 - 4
Particulate Measurement System 4750-PM
6.5 Troubleshooting
Refer to the Section 6.1 Safety Information section provided at the start of
this chapter and as given in the sections referenced below.
6.5.1 Common Issues
Symptom Solution Further options
Power/Comms
LED is OFF
Check power cables and fuse.
If necessary, replace the fuse
(see Section 6.4).
Alarm LED is
flashing RED
or AMBER
Likely cause: the sensor reading
is above the alarm level (this
may also be due to a sensor
check fail, see below).
Contact AMETEK
Land or our local
representative for
assistance.
Sensor check
has failed
(1) Rerun the sensor tests to
determine which check is
causing the alarm.
(2) Carry out the sensor
cleaning procedure (see
Section 6.3), then rerun
the checks.
(3) If the sensor checks fail
repeatedly, the sensor PCB
may need replacing
6.5.1 Alarms
The 4750-PM monitors threshold conditions that can be set in the
instrument to comply with local regulations and guidelines. Alarm conditions
are indicated by an alarm LED (refer to Fig. 3-2).
Alarm Description
Zero fault Fault with the sensor electronics.
Please contact AMETEK Land or our local
representative for assistance.
Span fault Fault with the sensor electronics or the laser (see
troubleshooting sensor check failures above).
Please contact AMETEK Land or our local
representative for assistance.
Air Purge Flow Failure
> Low Flow Alarm
The sensor requires a continuous supply of purge
air and may have become contaminated.
The sensor optics should be cleaned (see Section
6.3).