CMS-1 CARBON MONOXIDE MONITOR
Page 11
© 2017 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 23301, Rev. F
Figure 7
5.1
The monitor must be in operation for at least 30
minutes before zeroing. NOTE: If zeroing follows sensor
replacement, repeat the process after two days of
operation.
5.2
Open the instrument case cover to access the
faceplate. Refer to Figure 7 for callouts.
5.3
Attach the calibration connector to the impurity-
free gas, per Section 4.3.
5.4
Connect the calibration connector to the "Test
Gas" port on the faceplate, by aligning the tabs and
inserting the tube end connector into the port and turning
it slightly clockwise to lock.
5.5
Place the Run/Calibration toggle toward "CAL"
(calibration). The "ALARM" light will immediately turn
yellow
, and within a few seconds the intermittent alarm
horn will sound. Disarming the alarm per Section 1.8.2
will silence the horn during the adjustment.
5.6
Gently pull the tubing side of the release
connector, to make sure it is correctly seated in the
body. Slowly open the calibration connector valve to
introduce test gas. Test gas is entering the unit when the
flow meter ball rises. If the ball does not rise when the
calibration valve is opened, the test gas cylinder is
probably empty.
5.7
Adjust the flow-control knob until the flow meter
ball remains between .5 and .8 SCFH. The valve is
extremely sensitive. Several minor adjustments may be
required to position the ball correctly.
5.8
Allow test gas to flow through the instrument
until the digital readout stabilizes (about one minute).
5.9
Using a miniature screwdriver inserted through
the zeroing potentiometer opening, adjust the
potentiometer until the display reads ".00" (decimal,
zero, zero) NOTE: The readout responds slowly to the
potentiometer adjustment. Turn it slowly when making
adjustments.
5.10
After the display shows ".00", slowly turn the
potentiometer clockwise until the decimal disappears.
5.11
Return the instrument to operating mode per
Section 4.7.
RUN
CAL
Test Gas Port
Position toggle toward
CAL (calibration)
Flow-ball
Connects from test gas
AIR
QUALITY ALARM ARMED
Calibration UP Adjustment
(Increases display value)
Calibration DOWN Adjustment
(Decreases display value)
PPM CARBON MONOXIDE
"ARM" Switch
(Arms and disarms alarm horn)
Digital Display
Zeroing Potentiometer
Use this pot only to zero
the monitor, and only use
impurity-free (zero) gas.
Do not use to calibrate.
Use the triangular adjustment
ports to calibrate the monitor
using only 10 PPM test gas.
