CMS-2 CARBON MONOXIDE MONITOR
Page 3
© 2018 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 22925, Rev. I, 04/18
1.5.2
During operation, a small sample of air, referred
to as sample air, passes through the instrument and is
continuously monitored by the broadband MOS (Metal
Oxide Substrate) sensor. Although the sensor detects
CO, it also detects other oxidizable toxic gases
(hydrocarbons). If the sample-air supply fails for any
reason such as air blockage, loss of pressure, or
excessively high pressure, an intermittent audible alarm
will sound approximately every 10 seconds and the
exterior alarm light will illuminate
yellow
to alert the user.
1.5.3
In the event the sensor detects CO in the
concentration of 10 ppm or above, a continuous audible
alarm will sound and the exterior alarm light will
illuminate
red
to alert the user.
1.6
Annunciator Lights and Audible Alarms and
Switches. Use and Functions
1.6.1
Audible and visual alarms are provided on the
exterior of the instrument case and on the interior
faceplate. The exterior light illuminates
green
when
conditions are safe, or
yellow
or
red
depending on the
alarm condition. The audible alarm sounds in
conjunction with the visual alarm.
WARNING
All alarm conditions require the immediate
attention of the user. Stop blasting immediately
and remove the respirator as soon as it is safe
to do so, and check the monitor to determine
the cause for alarm.
1.6.2
The color of the alarm light in conjunction with
the nature of the audible alarm indicates the condition
causing an alarm. Functions of the alarm annunciators
are as follows:
1.6.3
Interior Calibration Light
Red Light - Intermittent Audible Alarm
The interior alarm light (calibration indicator) on the
faceplate of the instrument responds to toxic gas
conditions only. It is for use by the technician during
calibration testing and for calibration when the
instrument case is open.
1.6.4
Exterior Alarm Annunciators
Green Light - No Audible Alarm
No Alarm, Safe Condition: Do not use the
compressed air for breathing unless the exterior light
is illuminated
green
.
Yellow Light - Intermittent Alarm Horn (approximately
every 10 seconds)
Sample-Air Failure: This alerts the user that
pressure in the test chamber is either too low or too
high. Low pressure is usually due to loss of pressure
in the sample-air air line. High pressure is an
indication that the internal regulator is set too high.
Correct flow is observed on the flow meter; the flow
ball should be between 0.5 and 0.8 SCFH (standard
cubic feet per hour).
Calibration in Process: During calibration testing and
the calibration procedure, this alarm is activated.
The alarm will terminate when the technician has
correctly returned the monitor to service.
Yellow Light - No Audible Alarm
Warm-Up Period: During the first several minutes of
operation, the monitor goes through a warm-up
period while the sensor stabilizes. During the warm-
up period, the
yellow
light illuminates and all other
alarms are non-operational. The alarm will terminate
after the warm-up is complete.
Red Light - Continuous Audible Alarm
Toxic Gas Detected: This alarm occurs when toxic
gas or CO in excess of 10 ppm is detected in the
breathing air line.
1.6.5
Run/Calibration Switch: The toggle should be in
the RUN position for all operations other than the actual
calibration test and calibration process. If for any reason
the toggle is not in the RUN position, the instrument will
initiate a
yellow
light and intermittent alarm, indicating
that the sample air is not reaching the sensor. Correctly
positioning the toggle will terminate the intermittent
alarm.
1.7 Optional
Accessories
1.7.1 Remote
Alarm:
The 12-volt DC remote alarm is
a high-intensity, red-lens strobe light and high-decibel
horn. Unlike external alarms, this alarm does not require
an external power source. This accessory is
recommended in high noise areas or where the monitor
cannot be placed in a conspicuous location. The alarm
kit includes the alarm, stand, wiring connector, and 50
foot cable. See Accessories in Section 8.1. With
additional cable, the alarm may be used up to 150 feet
from the monitor. Consult Clemco Industries Corp. if
longer length is required.
