Amprobe CO2-100 CO2-Meter - Manual (Page 11)

5
In STEL and TWA modes, the main display shows
the weighted average of CO2 readings for the past
15 minutes (STEL) and 8 hours(TWA), but the lower
displays are the current AIR, DP/WB temperatures
and humidity readings.
NOTE:
• If the meter is turned on for shorter than 15
minutes, the STEL value will be the weighted
average of readings taken since power on. Same
for TWA values appear before 8 hours.
• It takes at least 5 minutes to calculate STEL and
TWA. The display shows “----” during the first 5
minutes from power on (Fig.2).
Fig.2
• While all readings are held unchanged, STEL
and TWA will keep updating every 5 minutes.
7. The instrument emits beeps (Abt.80dB) when CO2
level goes over the set limit and stops when any
key (but “POWER“ key) was pressed or readings
fall below the set value. It beeps again when value
goes over the limit. Restart the meter if beeper
can’t be stopped.
Auto Power Off
The meter turns off automatically after 20 minutes of
inactivity. To override the function, hold down “POWER
/ SET” and ”HOLD” for 2 seconds to turn on the meter
until “n” appears.