CMS-4 IN-HELMET CARBON MONOXIDE MONITOR
Page 10
© 2019 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 29872
3.4.4 Responding to a Sensor Failure Alarm
3.4.4.1
Perform a calibration, as described in Section 5.7.
3.4.4.2
If the sensor failure alarm continues, replace the
sensor, as described in Section 6.2.
3.4.4.3
If the sensor failure alarm continues after
replacing the sensor, contact the authorized Clemco
distributor the monitor was purchased through for further
instructions.
3.4.5 Responding to Clock Failure Alarm ‒ Figure 10
A clock failure alarm occurs if the monitor’s internal clock
malfunctions.
Figure 10
3.4.5.1
If the error code is 050, press and release
POWER/MODE to continue into Measuring Mode if the
instrument must be used temporarily.
3.4.5.2
Attempt to set the date using the DATE menu
item in User Mode.
Refer to Section 2.3: Setting Date
and Time.
3.4.5.3
If the date cannot be set correctly, contact the
authorized Clemco distributor the monitor was
purchased through for further instructions.
3.4.6 Responding to a System Failure Alarm
3.4.6.1
If a system failure occurs, the system failure
screen will display an error code similar to that shown in
Figure 11.
3.4.6.2
If the System Failure error code is anything but
031, as shown in Figure 11, the instrument cannot be
used. Contact Clemco Industries as soon as possible.
If the error code is 031, press and release
POWER/MODE to continue into Measuring Mode if the
instrument must be used temporarily.
Figure 11
3.5
Alarm Setpoints
3.5.1
There are six alarm points. The alarm points and
their factory settings are summarized below. There are
no adjustments of alarm setpoints.
*F. S. (Full Scale):
Is triggered when CO
concentrations go over the scale maximum of 1000
ppm.
WARNING:
Is triggered when CO concentrations
reach 10 ppm, which is the maximum exposure limit
for Grade D compressed air in the United States.
Alarm:
Is triggered when CO concentrations reach
10 ppm.
Alarm H:
Because the maximum exposure limit for
grade D breathing air is 10 ppm of CO, the high
alarm is also set to alarm when CO concentration
reaches 10 ppm. This alarm is a rapid, twice per
second beep and stresses the urgency to remove
the respirator as soon as it is safe to do so.
*TWA Alarm:
TWA is an acronym for time-weighted
average; it is the average reading of CO during the
last eight hours. The alarm triggers when TWA
reaches 25 ppm
*STEL Alarm:
STEL is an acronym for short-term
exposure limit; it is the average reading of CO
during the last 15 minutes. The alarm triggers when
STEL reaches 200 ppm
* Although some may find Full Scale, TWA and STEL
information useful, it is not relevant for supplied-air
respirator use because the maximum exposure limit for
Grade D breathing air is 10 ppm.
4.0
MANEUVERING THROUGH MENU MODES
This section helps the user maneuver through CMS-
4 menu items. The menu item under each mode is
listed in sequential order.
4.1
MEASURING MODE ‒
Measuring Mode is the
normal operating mode used to detect CO and observe
031
SYSTEM
FAIL
050
CLOCK
FAIL
