Clemco CMS-2, Instruction Manual

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CMS-2 CARBON MONOXIDE MONITOR Page 9
© 2018 CLEMCO INDUSTRIES CORP.

www.clemcoindustries.com

Manual No. 22925, Rev. I, 04/18
Figure 7
4.4.7
Make sure the flow-control knob is turned fully
clockwise to the CLOSED position.
4.4.8
Thread the calibration connector onto the
cylinder of test gas. (Use 10 ppm CO test gas to check
the calibration or to calibrate the monitor. Use zero,
impurity-free air to check if alarm is due to contaminated
air or other condition).
Figure 8
4.5 Prepare Monitor for Calibration ‒ Figure 9
4.5.1
Open the instrument case cover to access the
interior faceplate. Take care not to introduce blast
environment contaminants into the instrument when the
case is open. Refer to Figure 10 for faceplate-calibration
testing and calibration callouts.
Figure 9
4.5.2
Connect the tubing’s bayonet connector to the
Test Gas port by aligning the tabs, insert the connector
into the port, and turn it slightly clockwise until it locks.
4.6 Calibration
Test
4.6.1
Connect the calibration connector and test gas
per Sections 4.4 and 4.5.
4.6.2
Place the Run/Calibration toggle toward
CALIBRATION. The external alarm light will immediately
turn
yellow , and within a few seconds the intermittent
audible alarm will sound (the calibration indicator
remains
green ).
4.6.3
With the flow meter vertical, refer to Figure 9
and slowly open the flow-control knob 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 may be empty.
4.6.4
Refer to Figure 10 and adjust the flow-control
knob until the flow meter ball remains between 0.5 and
0.8 SCFH, normally a little nearer to 0.8. The valve is
extremely sensitive. Minor adjustments may be required
to correctly position the ball.
RUN
CALIBRATION
Calibration
Indicator
Calibration
Adjustment
Test Gas
Port
Adjust
potentiometer
through this port.
Position toggle
toward calibration
Flow Meter Ball
Connects from test gas.
Calibration Connector
Tubing Bayonet Connector
Test Gas
Tubing Connector
Insert connector into slide
release until it snaps into place.
Flow-Control Knob
Turn fully clockwise to close.
Slide Release
Push in to release
the tubing connector.
Humidifier-Case Top
Distilled water only.
Lock Stub
Humidifier-Case Bottom
Humidifier Sponge
Lock Slot