| ASIII Calibration
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| 6) Attach your instruments mouthpiece to the end of the regulator line – small plastic tubing (this is referred to as the calibration assembly). Make certain there is a good seal between the connector and the mouthpiece.
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| 7) If you are using a dry gas standard, depress the button on the regulator for 6 seconds. (If you are using a Wet Bath Simulator & Solution for a standard, you should blow into the inlet port of the simulator for at least six seconds).
Using either type of standard, on the 4th or 5th second of the 6 second count, press
and release the
READ button.
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Regulator button depressed
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(NOTE: The gas/vapor must be flowing through
the mouthpiece when the READ button is depressed and it is
suggested that it flow for at least one second after the READ
button has
been depressed).
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8) Carefully detach the Alco-Sensor III from the calibration assembly. Observe the display on the ASIII. A moving dash --- will
appear on the display before the display shows the value used in the
previous calibration (as long as the calibration screw has not been
adjusted). If the displayed value is the same as the calibration standard you are currently using, proceed to step 10. If the displayed value is different than your current calibration standard, follow the procedure detailed in step 9.
9) Place the screwdriver (must be non-metallic) in the calibration screw hole on the side of the instrument and turn the calibration screw until the reading on the instrument’s display is equal to the
current target value of your standard.
(Turn clockwise to increase the value; turn counterclockwise to decrease the
value). Once this is accomplished remove the calibration screwdriver without further changing the displayed value on the instrument.
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Screwdriver in screw hole
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