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Technical / AS FST

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Question ID:
 539
Section:
 AS FST

During an Alco-Sensor FST calibration or accuracy check the instrument first displays BLN which indicates a blank test is about to occur – no alcohol is needed for this blank test.  The instrument will then flash CAL (or ACC depending on the test being performed) – introduce the alcohol at this time.

Categories: AS FST, Technical

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