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3. Calibration
There are two calibration methods: Ambient Air (300-600ppm) and Nitrogen (0-200ppm).
By pressing the temperature unit switching button for 5 seconds, the monitor will enter CO2
calibration mode. While in calibration mode, press the temperature unit button quickly to
switch between AIR (Ambient Air Calibration) or N2 (Nitrogen Calibration). Select NO to exit
without calibration and pressthepower button to confirm.
4. Alarm Threshold
There are 2 fixed alarm thresholds: 5,000 ppm CO2 (low alarm) and 3% CO2 (Short Term Exposure
Limit) (high alarm). The alarm thresholds can be changed dependent on the user, to L0.5 (5000
ppm), L0.5T (5000 ppm TWA), L1.0 (10000 ppm), L1.5 (15000 ppm), and L3.0 (30000 ppm).
If the measured CO2 value exceeds the define Low Alarm threshold, the alarm LED will flash red
at 2Hz and the audio alarm “de de … de de …” will sound. If the CO2 level exceeds the High
Alarm threshold, the LED will flash faster and the audio alarm will increase. To alert users in a
noisy environment, the monitor will also vibrate.
5. Automatic Atmospheric Pressure Compensation
The displayed CO2 level is affected by atmospheric pressure or change in altitude. To
insure maximum accuracy, this monitor has automatic atmospheric pressure compensation
for CO2 concentrations by means of adigital atmospheric pressure sensor integrated in
the unit. No calculations or maintenance isrequired.
6. Man down alarm
Falling by breathing dangerous gases can cause serious injury and even fatality to workers. If the
Man down alarm function in SAN-10 is set on, SAN-10 can detect falls and send a man down
alert which will activate the audible and visual alarms and alert other people in the area.
The man-down detection uses a three-axis accelerometer to automatically monitor the user’s
movements. If a sudden fall/impact is followed by a lack of movement for 6 seconds, the alarm
will sound. Turn off the alarm by pressing either of the two buttons.