DeFelsko PosiTector Dew Point Meter Logger Plus Instruction Manual page 2

RH
Relative Humidity (measured)
Ta
Air Temperature (measured)
Ts
Surface Temperature (measured)
Td
Dew Point Temperature (calculated)
Ts-Td
Surface minus Dew Point Temperature (calculated)
Tw
Wet Bulb Temperature (calculated)
CAUTION:
DPM L probe, do not obstruct the airflow near the air temperature
and humidity sensors. Keep fingers away from the sensor, as body
heat can influence readings. Allow time for the probe to acclimate
and for the readings to stabilize when moving the probe between
different environments. When attaching a probe to the surface, do
not use excessive downward force, and do not drag it sideways.
When not in use, replace the protective rubber cap on the probe.
LED
Indicator
Batteries
(2x AAA)
Introduction
To ensure optimal performance of the PosiTector
(replacement filters available)
On/Off
Power
Switch
Air Temperature &
Humidity sensors
1
Kensington
Security
Slot (pg. 10)
Magnetic Surface
Temperature sensor
USB Port for
Continuous
Power