Automatic Power-Off - Fluke CO-210 Gebrauchsanweisung

Establishing a Baseline
Before testing for CO, establish a baseline against which the
Probe compares other environments.
Do this by turning on the Probe. If the Probe detects between
0-3 PPM of CO, the beeper sounds, the LED flashes once a
second, and the Probe establishes a new baseline.
If the Probe detects more than 3 PPM, it does not establish a
new baseline, but starts taking CO measurements.

Automatic Power-Off

The Probe automatically turns itself off after 20 minutes.
Muting the Beeper
To mute the beeper, press the ON/OFF switch for more than 2
seconds when turning the instrument on.
To re-enable the beeper, turn the Probe off and then turn it back
on.
Using the Probe as a Stand-Alone Unit
When the Probe is used as a stand-alone indicator, the LED and
beeper indicate the presence of CO.
The faster the LED flashes and the beeper sounds, the higher
the concentration of CO.
Above 200 PPM the LED stays on, the beeper sounds
continuously, and the frequency of the tone increases with the
concentration of CO.