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8.2
The following instructions cover the calibration
of the PanBlast
TM
AirScan Mobile CO Monitor.
8.3
Preparing the Calibration Connector
Test gas is completely dry and free of moisture
unlike normal air.
The sponge in the calibration humidifier
supplies the necessary moisture to the sample
gas. The sponge must be moist, but not wet.
To moisten the sponge:
(Reference Figure 4)
1
）
Press latch #4 to detach humidifier from
the valve.
2
）
Carefully add a few drops of distilled
water in the humidifier #2 to moisten the
sponge. The sponge must not be wet. If
necessary shake out any excess.
3
）
Attach humidifier #2 to the valve #5.
1)
3mm (1/8") OD tubing
2)
Humidifier tube
3)
Cal port connector
4)
Latch
5)
Needle valve
Figure 4
8.4
Proceed with calibration as outlined below.
Complete calibration requires use of impurity
free test gas to establish the correct zero
reading prior to further calibration. The
following instructions outline this procedure.
When impurity free test gas is not available, the
initial steps to set zero may be skipped and the
10 ppm carbon monoxide test gas may be used
to set the 10 ppm response and alarm.
1
）
On the calibration valve assembly, turn
the needle valve to the closed position.
2
）
Attach the calibration valve assembly to
the Impurity free test gas bottle.
3
）
Move the instrument RUN/CAL switch to
the CAL position.
4
）
Connect the calibration valve assembly
calibration connector to the instrument
test gas port.
5
）
Initiate gas flow into the instrument by
slowly turning the needle knob of the
calibration valve assembly to open.
Monitor the flow bar graph display to ensure
GREEN condition and allow the impurity free
gas to flow for at least one minute. Check the
air quality indicator to ensure it is GREEN.
6
）
If it is not GREEN adjust the calibration
adjustment screw to produce a GREEN
indication (Shown in Figure 3, page 4).
7
）
Remove the impurity free test gas from
the instrument and remove the calibration
valve assembly from the test gas bottle.
8
）
Attach the calibration valve assembly to
the 10ppm carbon monoxide gas bottle
and reconnect to the instrument test gas
port.
Allow 10 ppm carbon monoxide test gas to flow
for at least 20 seconds and check that the air
quality indicator has turned RED, if not:
9
）
Adjust the calibration adjustment screw
until the air quality indicator turns RED.
10
）
Reconnect the impurity free test gas.
Confirm that the instrument returns to a
GREEN air quality indication.
Properly secure the test gases and equipment.
8.5
INTERNAL BOARD SET-UP AND CONNECTORS
The PanBlast
TM
AirScan Mobile CO Monitor is
factory configured to operate on 220 VAC and
to alarm without delay when carbon monoxide
alarms or improper sample pressure occurs.
Internal controls and connectors allow user
modification of the factory settings as outlined
below.
To access the internal controls and connectors
the faceplate screw #8, Figure 3 must be
loosened and the faceplate opened. With the
faceplate fully opened the user has access to
sample lines, electrical connectors and the
mode select switch feature.
Revision of the factory set-up and connections must
be completed by a technician totally familiar with this
manual and the instrument application.
WARNING
