Calibration
CO
2
CALIBRATION
The meter is calibrated to a standard 400ppm CO
2
concentration at the
factory
CAUTION:
Do not calibrate the meter in an atmosphere of unknown CO
2
concentration.
1.
Place the meter in the 400ppm calibration chamber. Turn the
meter on
and hold down the
CAL/Esc
and
MODE/
▲
buttons simultaneously to enter CO
2
calibration mode. 400ppm and “CAL” will
blink on the LCD while performing
calibration.
2.
Wait about 5 minutes until the blinking
stops. The calibration is then completed
and the meter automatically returns to the
normal mode.
NOTE:
Ensure the batteries are fresh prior to calibration to
prevent an interruption or failed
calibration.
RH CALIBRATION
The meter is calibrated to a standard 33% and 75% salt solution bottle.
CAUTION: Do not calibrate the humidity without the default calibration
salt. Otherwise, permanent damage could occur. Contact the Triplett for
calibration salts or services.
33% calibration
1.
Plug the sensor probe into 33% salt bottle.
2.
In the normal mode, Press and Hold the
CAL/Esc
and
DP/WBT/▼
buttons to enter the
33% calibration. “CAL” and calibrating value
(32.7% if at 25°C) will blink on the LCD with
current temperature at the left.
3.
The meter is now calibrating, and will finish
in about 60 minutes when “CAL” and
humidity stop blinking.
