CMS-4 IN-HELMET CARBON MONOXIDE MONITOR
Page 18
© 2019 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 29872
Do not force it; if it does not easily snap into place, make
sure the cup’s flow arrow points up and to the left of the
monitor, as shown in Figure 22.
Flow Arrow
Figure 24
5.4.5
Close the connector slide valve by sliding it to
the CLOSE position, toward the test gas cylinder.
5.4.6
Remove the calibration cup by gently prying the
retaining clips off the monitor while lifting up on the cup.
Refer to Section 5.5 for additional information on
removing the calibration cup.
5.5
Remove Calibration Cup from Monitor
5.5.1
Make sure the connector’s slide valve is closed
by sliding it to the CLOSE position, toward the test gas
cylinder.
5.5.2
To remove the calibration cup from the monitor,
gently pry the upper retaining clip off the monitor while
lifting up on the cup, as shown in Figure 25.
Figure 25
5.5.3
Unscrew the calibration connector from the test
gas cylinder. The test gas cylinder has a positive seal,
whereas the calibration-connector valve does not. If the
connector is not removed from the test gas cylinder, over
time the cylinder will empty.
5.5.4
Refer to Section 5.8 for information on storing
the calibration kit and test gas.
5.6
Performing a Bump Test
A bump test is a fast way to determine if the monitor is
calibrated within a few ppm of the test gas. If the bump
test fails, a calibration is immediately and automatically
started.
A bump test should be done in a fresh-air environment,
as used to set the fresh-air baseline.
The following are required to bump test the CMS-4:
Test gas with 25 ppm concentration of CO, Stock
No. 25573.
Calibration connector with 0.5 LPM fixed-flow slide
valve, tubing, and calibration cup. Stock No. 29767,
assembled, as noted in Section 5.3.
5.6.1
Make sure the fresh-air baseline was set per
Section 5.2.
5.6.2
Prepare the calibration-connector regulator
valve and 25 ppm CO test gas, per Section 5.3. Make
sure the slide valve is closed.
5.6.3
With the monitor OFF, press and hold AIR and
POWER MODE. Release both buttons when the monitor
beeps.
BUMP
is displayed on the LCD. The monitor is
now in User Mode.
5.6.4
Press and release POWER/MODE once. The
calibration value (25 ppm) displays on the right side of
the screen.
5.6.5
Connect the calibration cup to the front of the
monitor over the sensor retainer. (The sensor retainer is
located to the right of the LCD screen.) The calibration
cup’s arrow must point up and to the left, as shown in
Figures 21 and 22. Gently press the cup onto the
monitor until it snaps into place. Refer to Section 5.4 for
additional information on connecting the calibration cup
to the monitor.
5.6.6
Open the connector slide valve by sliding it to
the OPEN position (away from the cylinder). Refer to
Figure 21.
5.6.7
Press and release POWER/MODE once. The
gas reading will flash and the monitor will count down
from 30 seconds in the lower-right corner. The bottom of
the screen will alternate between
APLY
and
BUMP
.
5.6.8
Once the countdown reaches zero, the bump
test is performed.
5.6.9
If the bump test passes, the LCD will display P
(passed) and BMP/CAL, as shown if Figure 26. Proceed
to Section 5.6.11.
Calibration cup correctly clipped onto the monitor.
Gently pry upper clip
from clip slot and lift
up to remove.
Upper clip inserted
into clip slot.
