HT instruments HT3320 - Manual (Page 23)

HT3320
EN - 22
7.5. DEW POINT TEMPERATURE MEASUREMENT
This mode allows displaying the dew point temperature, which is useful when making
thermographic surveys for the construction sector, further to the normal IR temperature
measures and air temperature/humidity measures.
1. Switch on the instrument and enter the “DEW POINT” mode
2. Set the desired values of the measurement parameters (see § 6)
3. Hold the meter and point it towards the object whose temperature is to be measured.
4. Press and hold the T key to start measuring, observing on the display the symbol
and the temperature value in the middle of the display, which varies in real time (see
Fig. 30)
Fig. 30: Dew point temperature measurement
5. Release the T key to stop the measurement and freeze the last read value. The display
shows the following symbol “ ”. The temperature values associated with fields AT,
RH%, DP and WB, if selected (see § 6.8, 6.9) are shown on the display.
6. The value on the bar at the bottom of the display indicates the percentage level of
mould corresponding to the measured dew point temperature value (DP).
7. The instrument displays the values of the fields MAX, MIN, MED, AVG and DIF, if
selected (see § 6.6, 6.7).