Brandson Equipment 302601 Mode D'emploi page 20

8.7 Manual reset
A manual reset of the display is possible only if the current value is under 10
PPM. To reset the display value to 0 PPM, press and hold the "test / hush" key for
approx. 3 seconds until the PPM sign is no longer displayed on the screen. Then,
release the key.
The manual reset can be carried out only under the following conditions:
• The CO concentration on the display is less than 10 PPM
• The first digital display shows "-"
8.8 Self test
This device carries out a self test every 10 seconds. If an error occurs during this
test, the device beeps every 30 seconds. At the same time, the yellow LED light
blinks. The display shows "---". In this case, reset the device. If the error persists,
exchange the device immediately.
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