Distech Controls GS-CDR02K Manuel d'installation du matériel - Page 8

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Calibration
Calibration with gas requires a field calibration kit with pressure regulator, tubing, sensor adapter and bottle of CO
gas. The certified
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calibration gas is applied directly to the CO
sensor to perform a gas calibration.
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Ensure the regulator knob is turned off and then hand tighten the regulator to the CO
gas bottle. A length of tubing should be
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connected between the regulator output and the sensor adapter hood.
Remove the cover of the device to be calibrated to expose the gas sensor. Carefully install the sensor adapter hood over the CO
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sensor on the PCB. The adapter should fit snuggly and securely over the sensor and remain in place during the entire calibration
cycle. This will ensure a stable ppm CO
environment during calibration. Turn the regulator knob on to allow gas to flow to the sensor.
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The CO
reading on the LCD will begin to approach ppm level of calibration gas. Wait 3 to 5 minutes until the CO
reading stabilizes.
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Enter the Setup Menu and use the <MENU> key to advance to the "Calibrat" item. Press and hold either the <UP> or <DOWN> key
for 5 seconds to start the gas calibration. The LCD will indicate "Calibrat / Done" if the process was successful. If "Calibrat / Fail" is
displayed then the process may have to be repeated. Press the <MENU> key to return to normal operation, shut off the gas supply
and remove the sensor adapter.
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