PAS Systems International PAS V Calibration Manual

PAS V

Passive Alcohol Sensor

CALIBRATION MANUAL

PAS Systems International, Inc.

215 Southport Dr. Suite 400

Morrisville, NC 27560

www.pasintl.com

Copyright© 2015 by PAS Systems International Inc., All Rights Reserved

CONTENTS

Wet Bath Method

Equipment Checklist for Wet Bath Sensitivity Check/Calibration 1
Mixing the Wet Bath Solution (optional) 2
Operating the Alcohol Wet Bath Simulator 3
Readying the PAS V 5
PAS V Sensitivity Checking 6
PAS V Calibration 7

Dry Gas Method

Equipment Checklist for Dry Gas Sensitivity Check/Calibration 8
Readying the PAS V 8
PAS V Sensitivity Checking 9
PAS V Calibration 11

Record Keeping 12

1

PAS Systems International recommends having the calibration checked
once a year, or whenever it seems to be losing sensitivity. Instructions for
both wet bath and dry gas checking/calibrating are included in this manual.
You may also choose to send your PAS V into the manufacturer (PAS
Systems) to be calibrated.

Equipment Checklist for Wet Bath
Sensitivity Check/Calibration

The PAS V Passive Alcohol Sensor Flashlight
The “Calibration Assembly” (A modified plastic mouthpiece that

connects the outlet of the wet bath simulator to the intake port of the
PAS V. Available from PAS Systems).

A NHTSA approved Wet Bath Simulator
500 milliliters of .005% ethanol alcohol solution.* To set sensitivity

lower, a 0.01% ethanol solution may be used.
Plastic tubing to connect the simulator’s inlet to a mouthpiece into

which the operator blows (or can also be used to connect the
simulator’s inlet to a wet bath simulator air pump).

A jeweler’s screwdriver to adjust the fuel-cell sensitivity if calibration
should be necessary.

A PAS Cal-Pump wet bath simulator air pump (recommended)

* Premixed Certified Stock Solutions are available from PAS Systems

International

2

Mixing the Wet Bath Solution (optional)

Certified calibration solution (500 ml) is available from PAS Systems
International but making your own calibration solution by diluting a stronger
stock solution with distilled water is a simple process using the following
steps.

Stock Solution To mix your (water/ethanol) stock solution, use a 100 ml
graduated cylinder for your mixing.

[1] Pour 77 ml of 100 proof vodka into the 100 ml graduated cylinder
[2] Pour the 77 ml of vodka into a 500 ml volumetric flask and fill the

flask up with distilled water.
This completes your mixture of stock solution.
You may keep your stock solution in a refrigerator for mixing calibration

solution as necessary. We do not recommend keeping stock solution for
longer than 45 days.

0.005% Ethanol Calibration Solution
[1] Using a 0.5 ml volumetric pipette, draw in 0.5 ml of the premixed

Stock solution into a 500 ml volumetric flask
[2] Fill the 500 ml volumetric flask up with distilled water.
This result gives you 0.005% calibration solution for use in the wet bath

simulator. For accuracy, if you have access to a quality evidential unit, run
your calibration fluid in the evidential unit to verify.