Accuracy Check -  Alco-Sensor FST
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5) While the display shows a flashing ACC, make an airtight connection between the delivery tube of the regulator and the open end of the mouthpieces.

 

 

6) Depress the regulator control button.

 

 7) When there is a continuous airflow - 6 liters per minute for four seconds - the instrument should capture a sample automatically.  Make certain that the gas continues to flow for 1-2 seconds after the sample is captured. (Sample collection is identified by a clicking sound.)

(Note: If for some reason you cannot provide an adequate flow rate for the instrument to collect an automatic sample, it is possible to perform an Accuracy Check by taking a manual sample.  To perform an Accuracy Check in this manner, depress the regulator control button and have the gas flowing to the instrument for seven seconds.  On the 5th second depress the ON button to take a manual sample.  Make certain that the gas continues to flow for 1-2 seconds after the sample is taken.)

 

 

 

8) Detach the mouthpiece from the regulator.

 

9) Observe the results and compare it to the known value of the Standard gas.

 

 
10) If the displayed result (as compared to the known value of the Standard gas) does not meet your programs specified tolerances, the unit will require a calibration adjustment.  If the result is within the required tolerances, the procedure is complete.

11) Record the results in your calibration log book.

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