RKI Instruments 65-2649RK-HC-04 - Manual (Page 35)

65-2649RK-HC-04 M2A Transmitter Operator’s Manual 30
Flickering
Display The display reading
flickers often. • The M2A is
experiencing false
readings due to RFI
or EMI.
• The noise filter
setting is too low.
• The zero
suppression setting
is too low.
• The display screen
is malfunctioning.
1. Verify that the M2A wiring is
properly shielded. See “Wiring
the M2A Transmitter” on page 11.
2. Verify that the detector wiring is
correct and secure.
3. Increase the filter setting in
Configuration Mode.
4. Increase the zero suppression
setting in Configuration Mode.
5. If the display difficulties continue,
contact RKI for further
instruction.
Fail
Condition • M2A indicates a
fail condition.
• Controller
indicates a fail
condition
• The detector wiring
to the terminal PCB
is disconnected or
misconnected.
• The wiring from the
M2A to the
controller is
disconnected or
misconnected.
• The detector fresh
air signal is low
enough to cause a
fail condition.
• The detector is
malfunctioning.
• The terminal or
display PCB is
malfunctioning.
1. Verify that the detector wiring is
correct and secure.
2. Verify that the wiring between the
M2A and the controller is correct
and secure.
3. Calibrate the M2A.
4. If the fail condition continues,
replace the detector.
5. If the fail condition continues,
contact RKI for further
instruction.
Slow or No
Response/
Difficult or
Unable to
Calibrate • M2A responds
slowly or does not
respond to
response test.
• Unable to
successfully set
the fresh air or
span reading
during
calibration.
• M2A requires
frequent
calibration.
Note: See “Calibration
Frequency” on page 31 for
calibration frequency
guidelines.
• The calibration
cylinder is low, out-
dated, or defective.
• The calibration gas
flow rate is too low.
• The calibration gas
is not an
appropriate
concentration.
• The detector is
malfunctioning.
• The terminal PCB is
malfunctioning.
• The flexible tubing
to the calibration
adapter/splash
guard has become
kinked, blocked, or
disconnected.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. Verify that the regulator used for
calibration is a 0.5 LPM regulator.
3. Verify that the calibration gas
concentration is appropriate for
the transmitter. The concentration
should be in the detection range,
preferably about half of the
detection range.
4. Verify that the flexible tubing to
the calibration adapter/splash
guard is clear and connected to
the calibration adapter/splash
guard.
5. If the calibration/response
difficulties continue, replace the
detector.
6. If the calibration/response
difficulties continue, contact RKI
for further instruction.
Table 7:Troubleshooting the IR LEL Detector (Continued)
Condition Symptom(s) Probable Causes Recommended Action