Alcolizer LE 5 Manuel d'instruction - Page 10

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10 Post Calibration Check

It is recommended that a calibration check be performed after a calibration procedure to

verify calibration accuracy. The recommended sequence is:

 1st calibration solution test.

 1st zero test.

 2nd calibration solution test.

 2nd zero test.

 3rd and final calibration solution test.

For these post calibration checks conducted in normal operation mode.

All readings should be between ±5 percent of the calibration solution value.

Make sure you blow a zero value through the unit as the last test to zero off the screen.

Clean and fully charge all units before returning to the customer.

To revert back to previous operation screen, perform the following steps:

 Press either of the Up/down keys to scroll to the Back menu function.

 Press the Test key to revert back to previous menu or operation screen.

This is a pre-set time period in which a calibration of the device will not be allowed if the

device's last test was a positive result and the calibration lockout time period from that test

has not elapsed (timed out) (refer Figure 7).

As fuel cells have a small sensitivity differential between wet and dry gas readings, a

correction factor must be applied to dry gas calibration values so that correlation between

wet and dry readings are the same.

Consult Alcolizer Technology for technical advice on this issue.

The recommended dry gas setup for in-house and field use is as follows

 Ensure gas is Dry reference gas 200–220PPM Ethanol (BAC: 0.081-0.090g/100ml).

 Turn valve on (1 turn anticlockwise) to commence calibration procedure. Ensure

valve is turned off (clockwise) after completion of calibration procedure.

 Ensure blue tube to mouthpiece connection is a friction fit (finger tight).

 Set flow-rate on Pre-set flow rate valve to approximately 10-12lts/min.

REF: LE5 Calibration Instructions_Whole Units V5

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