Approved Wet Bath Simulator (Standard); Accessory; True-Cal Ii Device - Intoximeters Alco-Sensor FST Operator's Manual

C. Expiration date is stamped on the label of the dry gas standard.
D. The optional TRUE-CAL II device (programmed for your tanks alcohol concentration) used in
the vicinity of the dry gas standard will display the expected value of the standard based on
current barometric pressure at the time of the test.
E. If you are not using a TRUE-CAL II device, the altitude chart on the side of the tank will give
you the stated value of your tank adjusted for the pressure changes due to the elevation at
which you are using the dry gas standard.
F. Tanks should only be used when they are between 10° - 40° C.
G. If the tank has been maintained at temperatures below 0°C (32°F), see tank manufacturer's
QAP for proper handling of the dry gas standard when bringing it back to operating
temperature.
For True-Cal II Device information see

Approved Wet Bath Simulator (Standard)

ELEMENTS:
A.
B.
MAKEUP:
CHARACTERISTICS:
A.
B.
C.
D.

Accessory

True-Cal II Device

Variations in barometric pressure can affect the expected value of a pressurized dry gas standard, according to
standard gas laws. The TRUE-CAL II device is designed to sense changes in barometric pressure and report an
adjusted value for the dry gas standard.
The TRUE-CAL II works only with Intoximeters approved dry gas standards. Due to strict accuracy and quality
requirements for all tanks sold by Intoximeters, the TRUE-CAL II device should not be used with gas standards
supplied by other vendors unless otherwise approved. The TRUE-CAL II is an instrument designed to measure the
current barometric pressure in the environment where the TRUE-CAL II device is placed. The TRUE-CAL II will
use the detected pressure value and apply a correction factor to the preset gas concentration programmed into
your TRUE-CAL II (presumably the "sea level" value of the dry gas calibration standard being utilized which
appears on the label of all Intoximeters approved dry gas cylinders). The correction factor is based upon the local
pressure as a percentage of the barometric pressure at sea level (at standard atmosphere).
The TRUE-CAL II will adjust the stated sea level value of your dry gas standard to the corrected value and will
display that corrected value when the red button (
level of accuracy in determining a dry gas standard's expected value. An alternative solution would be to use an
elevation chart to predict the standard's current expected value, but this method requires that you know your
current elevation and it does not take into consideration the effect of weather conditions on current ambient
pressure.
A CALIBRATION STATION consists of an Intoximeters approved dry gas standard, a regulator and a TRUE-CAL II
device.
Accessory below.
Glass jar, which holds 500cc of solution.
Jar head contains heater thermostat, stirrer, thermometer, inlet and outlet ports for
sampling headspace gas standing above the solution.
Solution is a water/alcohol mixture of a certified BrAC/BAC concentration.
Seven-month shelf life for refrigerated, unopened bottles of solution. Or as determined
by the manufacturer.
30 tests per bottle of solution.
Liquid should be clear with no visible particles suspended in the solution.
A simulator containing a solution of known BrAC/BAC value must be at the operating
temperature of 34°C. The simulator top must be on securely so the system is airtight.
To check, cover the outlet port and blow into the intake port. Air bubbles will not rise
rapidly through the solution if the top is secure.
ADMINISTRATIVE / MAINTENANCE FUNCTIONS
button) is pressed. This system provides a high
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Alco-Sensor FST Operator Manual, Page 23 of 33, 11/30/2017