CMS-1 CARBON MONOXIDE MONITOR
Page 13
© 2017 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 23301, Rev. F
7.1.14
Calibrate per Section 4.0.
7.1.15
Close and secure the instrument case cover,
tightening the screws to a maximum of 20-inch-lbs.
Figure 8
7.1.16
Return the monitor to service and record sensor
replacement date.
7.1.17
Follow calibration test schedule per Section 6.2.
7.2
Fuse Replacement
7.2.1
The fuse cap is located on the side of the
instrument case. Remove the cap to access the fuse.
Purchase a 1-amp fuse locally and keep spares on
hand.
8.0
TROUBLESHOOTING
Shorting electrical components can result in
serious electrical shocks, or can damage
equipment. All electrical troubleshooting must
be performed by a qualified electrician.
8.1
Instrument will not calibrate: If the display
does not stabilize, or respond to calibration
adjustments.
8.1.1
Make sure the Run/Calibration toggle switch is
set toward "CAL".
8.1.2
Check flow meter. If the flow ball does not rise,
the connector’s slide valve may be off, or calibration
cylinder may be empty.
8.1.3
Replace sensor.
8.2
Intermittent alarm: A pressure switch
monitors pressure of sample-air delivered to the
sensor. If pressure at the switch (which is monitored
by flow through the flow meter) drops below
minimum requirement, or rises above maximum, the
monitor initiates an intermittent alarm.
8.2.1
Before doing pressure tests, make sure the
Run/Calibration toggle switch is toward "RUN". If the
toggle is not in the "RUN" position, the instrument will
initiate an intermittent alarm, indicating that the sample-
air is not reaching the sensor. Correctly positioning the
toggle will terminate the intermittent alarm.
8.2.2
Make sure the sample-air is between 55 psi and
145 psi. If the sample-air is higher than 55 psi, the
restriction is internal. Proceed as follows:
8.2.3
Check flow through the flow meter. If flow ball is
below .4 SCFH or above .9 SCFH, adjust the pressure
regulator accordingly, until the flow ball remains between
.5 and .8 SCFH. In some cases, slightly higher or lower
flow is required. Slowly increase and decrease pressure
at the pressure regulator. If the regulator pressure was
set outside the limits, the alarm will disengage as soon
as the pressure is corrected.
8.2.4
Check internal instrumentation tubing for breaks,
kinks, or disconnection. If tubing has come loose,
reconnecting it will re-establish function and the monitor
should operate correctly.
Sensor Housing
Sensor
Pin Sockets
Mounting Screws
Circuit Board
Remove shorting spring
from pins before installing
new sensor.
