Accuracy Check Instructions for an Alco-Sensor III

Accuracy Check - ASIII 8) You should know the expected value of the standard – this will be used to compare against the actual result determined by the instrument. True-Cal device displays .080, *this is the expected value of the* *Standard used for this demonstration* 9) Submit a gas sample from the standard to the Alco Sensor III for at least six (6) seconds. On the 4^th or 5^th second of the count, depress the read button and hold it down.	*Submit a gas sample*
(NOTE: The vapor must continuously flow through the mouthpiece until one second after the read button is depressed).	READ button is depressed
10) Carefully detach the ASIII from the standard and observe the displayed reading until it becomes stable for 5 seconds. The stable number is the final result. 11) The difference between the final result and the expected value of the standard should be within the tolerance allowed in the Quality Assurance Plan set for your program. 12) If the difference is greater than the specified tolerance, the unit requires a calibration adjustment. (Follow instructions for CALIBRATION).	*Observe final reading on ASIII. Expected value for the standard used for this demonstration was .080%*
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