What Is An Acceptable CHECK Value?
A satisfactory CHECK result is generally one that is within ±0.03mg/L of the
value of the AlcoCal
®
gas standard.
If the alcohol value of the standard is 0.35mg/L, a CHECK result between
0.32 and 0.38mg/L inclusive would be acceptable.
Calibration Adjustment
The Calibration ADJUSTMENT Procedure
1. Switch on and access the Calibration Adjustment option of the
SUPERVISOR MENU, as described above.
2. The instrument temperature must be in the range 15
0
C - 35°C.
Assuming this condition is met, the next screen to appear will be:
3. Use the Left and Right buttons to change the displayed number,
to agree with the known alcohol standard (after making any
allowance for altitude for a dry-gas); then press button (C) to
select.
4. Next select either “dry” or “Wet” depending upon whether the
operator is using a dry gas or wet vapour.
5. When the instrument is ready, take a sample of the alcohol
standard gas using the sample procedure outlined above in the
check procedure:
6. The instrument now calibrates itself, automatically:
The process is now complete.
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