DeFelsko PosiTector DPM v.1.2 - Manual (Page 3)

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Introduction Introduction
The Dew Point Meter is a hand-held, electronic instrument
that measures, calculates and records climatic parameters,
quickly and accurately. An optional AC model includes a
built-in AC port and matching power adapter.
Measured parameters are:
Ta - Air Temperature
RH - Relative Humidity
Td - Dew Point Temperature
Ts - Surface Temperature
D
- Surface minus Dew Point Temperature
Power-up / Power-down Power-up / Power-down
The Dew Point Meter powers-up when or is pressed.
To preserve battery life, the instrument powers down after 10
minutes of no button activity. To power down immediately,
hold both buttons down for 5 seconds. Settings are retained
during power-down.
Calibration Calibration
All instruments are shipped with a Certificate of Calibration.
For organizations with recertification requirements, the instru-
ment may be returned at regular intervals for calibration.
The recommended calibration interval is one year from
receipt of the instrument. The interval should be adjusted
according to individual usage and environment.
(Written Calibration Procedures are available at no charge.)
Typical Display