M2A Transmitter Operator’s Manual
49
Frequent or
Suspect
Alarms
The M2A alerts you to
frequent or suspect alarms
while the fresh air
readings remain on zero
(20.9 for oxygen).
•
The M2A is experiencing
false readings due to RFI or
EMI.
•
The detector wiring is
disconnected, misconnected,
or intermittent.
1. Verify that the M2A wiring is properly shielded.
See “Wiring the M2A Transmitter” on page 28.
2. Verify that the detector wiring is correct and secure.
3. Increase the alarm on delay setting in Configuration
Mode.
4. If the frequent or suspect alarm difficulties
continue, contact RKI for further instruction.
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 28.
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
•
Unable to successfully
set the fresh air or
span (zero for oxygen)
reading during
calibration.
•
M2A requires
frequent calibration.
Note:
See “Calibration
for calibration frequency
guidelines.
•
The calibration cylinder is
low, out-dated, or defective.
•
For non-XP CO, H
2
S, or O
2
detectors: The membrane on
the detector housing cap is
blocked with dirt of some
other particulate
contamination.
•
For CT-7 Series detectors:
The hydrophobic membrane
on the plug-in sensor face is
blocked with dirt or some
other particulate
contamination.
•
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. For non-XP CO, H2S, or O2 detectors: Check the
face of the detector housing cap and remove any
particulate contamination from the hydrophobic
membrane, if necessary. If the membrane appears
saturated with contamination or is damaged, replace
the membrane as described in “Replacing the
Hydrophobic Membrane (Non-XP CO, H
3. For CT-7 Series detectors: Check the plug-in sensor
face and remove any particulate contamination
from the hydrophobic membrane, if necessary. If
the membrane appears saturated with contamination
or is damaged, replace the membrane as described
in “Replacing the Hydrophobic Membrane (CT-7
Series Toxic Detector)” on page 59.
4. If the calibration/response difficulties continue,
replace the detector.
5. If the calibration/response difficulties continue,
contact RKI for further instruction.
Table 14:Troubleshooting the M2A
Condition
Symptom(s)
Probable Causes
Recommended Action
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