10
PAS V Calibration
This procedure follows the same steps as the sensitivity check procedure except that
after the sample has been blown into the unit, the signal gain is adjusted to the point
where two red bars light up.
NOTE
Monitor the red low battery light of the PAS V to ensure that it does not
start flashing during the calibration procedure. If it does, the battery must be
charged before proceeding.
1. Remove the plastic plug on the back of the flashlight tube by carefully prying out
with the small screwdriver. Inside you will see the PAS V calibration adjustment
pot (screw).
2. Repeat Steps 1-7 for PAS V Sensitivity Checking.
3.
Pass a small flat blade jeweler’s screwdriver through the opening and into the
calibration adjustment pot (screw). Turn the calibration adjustment all the way up
(counter clockwise). The adjustment is free to rotate approximately 270
°
. Take
care not to use any force. With the calibration adjustment at maximum, all three
red bars light up.
4. When all bars of the display light up (10-20 seconds after sampling), turn the
calibration adjustment down (clockwise) until the top red bar just goes out. You
may need to make several small, soft and easy adjustment as the fuel cell climbs
to its peak reading. If your adjustment is slightly too high, you should see the
third red bar flash on and off. Turn counter clockwise just enough so that the
flashing stops. Calibration is now complete.
5. Replace the plastic plug by pressing firmly.
6. Turn off the flashlight and the PAS system. The unit is now ready for operational
use once it has been fully charged.
