RKI Instruments M2 for 12 VDC - Manual (Page 29)

M2 Transmitter Operator’s Manual, 12 VDC Operation 24
Flickering
Display The display reading
flickers often. • The M2 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 M2 wiring is
properly shielded. See “Wiring
the M2 Transmitter” on page 9.
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 • M2 indicates a fail
condition.
• Controller
indicates a fail
condition
• The detector wiring
to the terminal PCB
is disconnected or
misconnected.
• The wiring from the
M2 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
M2 and the controller is correct
and secure.
3. Calibrate the M2.
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 • M2 responds
slowly or does not
respond to
response test.
• Unable to
successfully set
the fresh air or
span reading
during
calibration.
• M2 requires
frequent
calibration.
Note: Under “normal”
circumstances, the
detector requires
calibration once every
three months.
See “Calibration
Frequency” on page 25 for
calibration frequency
guidelines.
• The calibration
cylinder is low, out-
dated, or defective.
• The detector is
malfunctioning.
• The terminal PCB is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. If the calibration/response
difficulties continue, replace the
detector.
3. If the calibration/response
difficulties continue, contact RKI
for further instruction.
Table 7:Troubleshooting the Combustible Gas Detector (Continued)
Condition Symptom(s) Probable Causes Recommended Action