Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
E - 2
E1.1 Troubleshooting
Problem seen Possible cause Recommended solution
Transceiver display is
blank
No power Check power supply
Check power cable
Hardware fault Contact AMETEK Land for
advice
Transceiver does not
recognise AFU
Communications problem.
This can be identified by
looking at communications
LED23 (TXD) and LED24
(RXD) which should flicker
rapidly if communications
are normal
Check wiring
Check jumpers LK1 And
LK2 are fitted on AFU
AFU Switch settings Check status of AFU
switches S2, S5, S7
AFU 4-20 mA outputs do
not function
Transceiver is not
communicating with AFU
As above
Unit does not output
opacity after calibration
Output is PLCF No action needed.
Instrument is designed
to output the PLCF value
for 90 s at the end of a
calibration check
Unexpected calibration
checks
Internal timer is in use Set parameter 95 to value
0 to disable calibration
check timer
Intermittent loss of power
causes instrument to
restart
Check power connections
are secure
Check mains power to
AFU is reliable