CMS-1 CARBON MONOXIDE MONITOR
Page 12
© 2017 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 23301, Rev. F
6.0
GENERAL MAINTENANCE
6.1
Cleaning
6.1.1
The need to open the case periodically to
calibrate the instrument subjects it to external
contamination. Take care not to introduce contaminants
into the instrument when the case is open.
6.1.2
Clean the exterior of the case with a cloth
soaked in a solution of water and mild detergent. Do not
clean with solvent cleaners.
6.2
Calibration Test Schedule
6.2.1
Test the calibration when it is initially setup and
daily for the first week. Check it once a week for the first
month. Check it at least once a month thereafter. Refer
to Section 4.0 for test procedure.
6.3
Calibration Schedule
6.3.1
Avoid the urge to calibrate the instrument.
Calibrate only when the calibration tests show it is
required. Refer to Section 4.0.
6.4
Alarm Test
6.4.1
Although uncommon, alarm-lights and horns do
fail. Check their function before each use by placing the
Run/Calibration toggle toward "CAL". The "ALARM" light
will immediately turn
yellow
, and within a few seconds,
the intermittent alarm horn will sound. Placing the toggle
in "RUN" position returns the alarms to their normal
operation.
Never use the respirator without first
verifying that the monitor is in the operating mode;
all three annunciator lights must be
green
, with no
audible alarm.
7.0
SERVICE MAINTENANCE
NOTE: Do not attempt to repair the instrument or
replace any item that is not listed in this section, or
that requires parts not shown in Section 9.0. Contact
a Clemco distributor for authorization to return the
instrument for evaluation or service.
7.1
Sensor Replacement
7.1.1
Sensor life depends on several factors, but in
most cases, the sensor should last two to three years.
Signs that the sensor is failing is the frequent need to
calibrate the monitor and large spans (drifting) in the
display from one calibration to another.
7.1.2
The following materials are required to replace
the sensor:
10 PPM test gas .......................... Stock No. 22865
Impurity-free gas .......................... Stock No. 11132
Calibration connector .................. Stock No. 23011
Sensor ......................................... Stock No. 23015
Medium size screwdriver
Small screwdriver
7.1.3
Open the instrument case and remove the four
faceplate-screws. NOTE: The screws on the left are
shorter than those on the right, replace accordingly.
7.1.4
Carefully lift the faceplate to expose the
instrumentation, using care not to disconnect any wires
or tubing.
7.1.5
Locate the clear-plastic sensor housing, shown
in Figure 8, and remove the mounting screws. The
screws are easily removed Do not press hard against
the screw-heads; excessive pressure could damage the
circuit board.
7.1.6
Carefully lift the sensor housing out of the way.
7.1.7
Pull straight up to remove the sensor.
7.1.8
Discard the old sensor to prevent reuse.
7.1.9
Handle the new sensor with care. Remove the
shorting spring from the pins, as shown in Figure 8, and
then plug the sensor into the sockets.
7.1.10
Place the sensor housing over the sensor. Align
the mounting screw holes, and alternately tighten the
screws until snug
. Do not push hard on the screw
heads when tightening. Do not over-tighten.
7.1.11
Replace the faceplate, making sure that all
internal air lines are free of interference, binding or
kinks, and that all tube connections and wire
connections are secure. Tighten the faceplate screws
finger-tight to ensure they are threading correctly, and
then tighten them barely snug with a screwdriver.
7.1.12
Apply sample air and power per Section 3.0.
Run the monitor in operating mode for at least four hours
before calibrating.
7.1.13
Check the display to verify it reads zero (00). If
not, adjust per Section 5.0.
