CMS-2 CARBON MONOXIDE MONITOR
Page 8
© 2018 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 22925, Rev. I, 04/18
4.0
CALIBRATION TEST AND CALIBRATION
NOTE: Thoroughly review and understand the
calibration testing and the calibration process
before testing or calibrating the instrument. Refer to
Section 4.1.
WARNING
This instrument must be tested and calibrated
with 10 ppm test gas. Do not test or calibrate
with any other test gas concentration. Doing so
will place the monitor out of calibration and
may fail to alert the user of toxic gases.
Breathing toxic gases can cause death.
4.1
Difference Between Calibration Test and the
Calibration Process
4.1.1
It is important to understand the difference
between calibration testing and the calibration process.
4.1.2 Calibration test:
Calibration testing means
applying 10 ppm test gas to the instrument to make sure
it responds with an alarm when CO concentration
reaches the maximum permissible exposure level, and
that it responds with a safe signal when impurity-free air
is applied. Calibration test does not include any
adjustment of the instrument. Calibration (adjustments)
should be done only when the calibration test shows it is
necessary.
4.1.3 Calibration process:
Calibration means
adjusting the instrument. Calibration should be done
only when the instrument does not respond during
calibration testing or when it remains in alarm at startup.
4.2
Materials Required for Tests and Calibration
10 ppm test gas ............................... Stock No. 22865
Impurity-free test gas (when required,
see Section 4.9) ........................... Stock No. 11132
Calibration
connector ....................... Stock No. 22893
Distilled
water
Small adjusting screwdriver
(when calibration is required)
4.3 Stabilization
Period
4.3.1
The monitor must be in operation for at least 30
minutes before calibration tests. DO NOT test the
instrument until it has gone through the warm-up period
and has been in operation with sample air flowing
through it (see Section 3.0) for at least 30 minutes.
4.4
Prepare Calibration Connector
NOTE: Unlike ambient air, calibration test gas is
bone-dry. Attempts to test or calibrate the monitor
without humidifying the test gas will cause
significant reading errors of compressed air with
normal levels of humidity.
4.4.1
Before connecting the humidifier to the
calibration connector, dampen the humidifier media with
distilled water (do not use anything other than distilled
water) as follows:
4.4.2
Open the humidifier case by holding the
assembly and rotating the top counterclockwise, as
shown in Figure 6.
NOTE: The O-ring on the bottom case provides a tight
friction seal; use hand force to rotate and separate the
humidifier top and bottom cases.
Do not use tools that
could crack the case.
Figure
6
4.4.3
When in the unlocked position, pull the top
straight UP to remove the top and access the humidifier
sponge.
4.4.4
Moisten the sponge by putting in a few drops of
distilled water, as shown in Figure 7. Shake out excess
water. The humidifier needs only to be dampened;
excess water must be removed so that it does not enter
the instrument’s plumbing.
4.4.5
Refer to Figure 7 and reassemble the humidifier
by aligning the bottom-case lock stubs and top-case
slots, push them together, and rotate the top clockwise
to secure.
4.4.6
Refer to Figure 8 and insert the humidifier’s tube
connector into the slide release until it snaps in place.
Gently pull the connector to make sure it is seated and
locked.
Case Top
Case Bottom
Closed, Locked
Open, Unlocked
Open
Close
Humidifier
