Copyright 2011 VTI-Valtronics Inc. 6
Operation
Power ON/OFF
Press the SET button to turn the meter ON or OFF. At power up, the unit emits a short beep and
starts a 30 second count down for warm up, and then enters its normal mode for displaying CO2,
temperature, and humidity readings.
Measurements
The fast response of the meter provides an updated reading every second with the exception of
rapidly changing temperatures which will require a 30 second delay for CO2readings, and as much
as 30 minutes for the humidity to respond.
Data Hold
Pressing the HOLD button will freeze all readings except the STEL and TWA. Pressing the HOLD
button again will cancel the hold mode.
Backlight
Pressing and holding the MODE button for more than 1 second will activate or cancel the Back
Light mode.
STEL, TWA, MIN and MAX
Pressing the M/AV button will display the Minimum, Maximum, and average readings of CO2.
Each press of the button displays MIN, MAX, STEL and TWA in sequence and then returns to
normal operation.
Alarm
The meter has an audible alarm to provide warnings when the CO2concentration exceeds the limit.
It emits an 80 Db warning beep whenever the limit is exceeded. Pressing any button except SET
will stop the alarm, and it will stop on its own when the concentration returns below the set point.
