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CAB Clean Air Box Set Up and Operation
wArning
Always operate the CAB Clean Air Box in the upright position. Failure to comply may
result in one or all of the following:
Auto drains will not function properly. This may result in the contamination of the
CO monitor and cause water to be passed through the air supply hose and into the
worker's respirator.
Auto drains may become clogged. See user instructions for information on cleaning
or replacing auto drains.
Filters may accumulate moisture and/or contaminants. See user instructions for
information on replacing filter.
Set Up and Operation
Prior to hooking up the incoming air supply lines, purge all moisture by running the air
before connecting the CAB. Attach to incoming air source; do not exceed 150 psi.
Connect AC cord to power inlet on the side of the CAB and then plug cord into an AC
power source.
nOTE
This unit may be operated using DC power or eight AA batteries if no AC power is
available.
Flip switch on Control Box to ON position. (Figure 1)
Fig. 1
On/Off
Button
Fig. 2
nOTE
The knob must be in RUN position for active monitoring of CO in the air supply.
Attach respirators and adjust regulator to appropriate pressure per respirator
manufacturer's recommendation. For units with independent regulators, adjust each
regulator as appropriate for each outlet being used.
Calibration and Zero-Point Process
Zero-Point Adjustment
nOTE:
It is recommended that the Clean Air box be under pressure with no air going
through the outlet fitting when perfroming zero point adjustment or calibration.
Ensure the knob on the CO Monitor
is rotated to the TEST position. This
will prevent the Low Flow alarm from
sounding during start up if no air is
flowing. (Figure 2)
Push the ON button located behind the
front cover of the
CO Monitor. (Figure 2)
Wait for the 60 second countdown
shown on the CO Monitor display
screen.
Calibrate the CO Monitor if necessary.
See Calibration Instructions.
Connect the remote alarm assembly
(optional) to the remote alarm jack.
www.bullard.com
Clean Air Boxes (CAB) Series
nOTE:
If monitor has been relocated to a different working area and ambient
temperatures change, allow the unit to stabilize for 15-20 minutes prior to Zero
Point adjustment and calibration. Zero calibration should be performed before
calibrating the monitor with CO gas. Bullard recommends using impurity free test
gas to re-zero whenever the zero point has drifted.
Zero Adjustment Procedure
Remove the front cover of the CO Monitor.
Push the ON button. The unit will beep and begin a 60 second countdown.
Rotate the knob located on the front of the CO Monitor to the CAL position.
"AC" will appear on the display.
Press and hold the On/Off button until it beeps.
"AO" will now appear on the display.
Attach the regulator to the zero gas cylinder.
Insert the calibration connector fitting into the center of the knob on the front of the
monitor.
Open the cylinder valve fully. The flow rate is preset, so there is no need to adjust it.
The red LED will continue to blink for approximately 90 seconds during which the zero
adjustment process will take place.
Watch for the green LED to begin blinking. This indicates a successful zero.
With the zero air flowing, rotate the knob to the TEST position. The reading should be Co
or Co1. If any other reading is displayed, repeat Zero Point Adjustment.
Close the regulator on zero gas cylinder completely. Remove the calibration connector
fitting from the center of the knob.
With the incoming air flowing, turn the knob to RUN.
nOTE
Knob must be in RUN position for active monitoring of CO in the air supply.
wArning
These units will not remove Carbon Monoxide (CO), Carbon Dioxide (CO
or other toxic gases or fumes. These units will not increase the oxygen content of an
air supply and should not be used when air entering the system is oxygen deficient.
Air filtration systems must be operated in the upright position to allow the auto
drains to properly seat. The standard clean Air Box (CAB) filtration units are not
explosion proof and should not be located in a non-explosive environment.
Calibration instructions
The COM5 and COM10 are Auto-Cal instruments. All calibration adjustments are made
automatically.
Monitor calibration should be performed monthly or whenever the reading may be
questionable. A calibration schedule should be maintained for future reference. To obtain
an accurate calibration, we recommend the use of Bullard calibration kits.
Calibration Procedure
Remove the front cover of the CO monitor and if necessary, push the ON button.
Rotate the knob located on the front of the monitor to the CAL position.
"AC" will appear on the display.
Attach the regulator to the calibration gas cylinder (10 ppm CO required).
Insert the calibration connector fitting into the center of the knob.
Open the cylinder valve fully. The flow rate is preset, and there is no need to adjust it.
User Manual
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