CO Clear
User Manual
Int. Approved
Document ref: ACO-810-28
October 2018
Page 19 of 24
Copyright © 2006 Analox Ltd. All Rights Reserved.
Commercial in Confidence
10.4
Span calibration
Fit the control valve to the span gas.
Push the calibration valve pipe fully into the elbow push-fit connector of
the sensor housing of the unit.
Fully open the control valve by turning the control knob anti-clockwise.
Allow the gas to flow for 2 minutes.
Enter Technician Mode by pressing the mode switch 3 times. If entered
successfully the green LED will flash off for 1.5 seconds and on for 0.5 of a
second.
Select Span Calibration by pressing the mode switch 4 times. The Red
Alarm 2 LED will light up to show you are now in this mode.
Press the mode switch 2 times to start the Span Calibration, the Red
Alarm LED will turn off and the Green LED will continue to flash.
Wait one minute for the instrument to adjust. When the instrument has a
new calibration value, the buzzer will sound one bleep and all the LED’s
will be off.
Accept this new calibration value by pressing the mode switch 2 times.
The green LED will flash to show the instrument has accepted the new
Carbon Monoxide value.
To ret
urn to normal operation, press the mode switch once. The LED’s and
buzzer will illuminate / sound 4 times before returning to normal
operation.
Fully close the control valve by turning the control knob clockwise.
Remove the calibration valve pipe from the elbow push-fit connector of
the sensor housing of the unit.
10.5
Alarm check
To verify that the indicators and the audible alarms are working, press the Mode switch
on the
Analox
CO
Clear
. The indicators and the audible alarm will pulse four times.
To verify that the alarm levels are correctly set, you will need the following equipment:
1)
Test Gas cylinder containing 10ppm Carbon Monoxide, 21% Oxygen in the
appropriate balance gas for that particular instrument
2)
Control valve
Then follow the procedure below:
Fit the control valve to the test gas cylinder.
Push the calibration valve pipe fully into the elbow push-fit connector of
the sensor housing of the unit.
Fully open the control valve by turning the control knob anti-clockwise.
After a short time the 'Alarm 1' alarm should operate.
After further period of time the ‘Alarm 2’ alarm should operate.
Fully close the control valve by turning the control knob clockwise.
Remove the calibration valve pipe from the elbow push-fit connector of
the sensor housing of the unit.
Summary of Contents for CO Clear
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