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8.9 End of service life of the CO detector
If the product has reached the end of its service life (approx. 7 - 10 years), a beep
sounds 3 mes in succession every 60 seconds and at the same me the yellow
LED blinks.
8.10 Calibraon
The calibraon can only be carried out by experts. Never calibrate this device
by yourself!
The calibraon is carried out with a gas concentraon of 400 PPM. This will not
reduce the accuracy of the unit. Each device was calibrated before delivery. Press
the "test / hush" key unl all 3 LEDs light up. Then release the "test / hush" key. The
green and the yellow LEDs switch o and only the red LED is on. This means that
the calibraon mode is acvated for 5 minutes. If the device cannot measure any
CO concentraon within these 5 minutes, the calibraon mode ends automacally.
Aer calibraon with carbon monoxide has been carried out, all 3 LEDs light up 3
mes. This means that the calibraon was successful.
Note: This device has a minimum CO concentraon of 250 PPM
for calibraon. If the CO concentraon is less than 250 PPM, the previous
calibraon values are not overwrien.
If the CO concentraon on the display is above 30 PPM, the unit leaves
automacally the calibraon mode to avoid a malfuncon. If the cali-
braon mode is triggered accidentally, the "test / hush" buon should be
pressed once to end this mode.
9. When the CO alarm is triggered
Immediately seek fresh air or open all doors and windows to venlate the area and
allow the carbon monoxide to escape.
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