If you choose “yES”, after you press the REC/ENTER button the instrument will prompt you
to confirm that decision by displaying the term “Ent” below “yES” and sounding three
beeps. To confirm that you want to begin the erasure/formatting procedure, press the
REC/ENTER button. “Ent” will then flash several times and the instrument will sound
another three beeps to confirm that the SD card has been erased and formatted.
Once the SD card has been formatted (or not), the display will either return to the first of the
eight steps in the setup sequence—setting the current date and time—or show the term
“ESC”. If “ESC” appears, press the POWER/ESC button to exit the setup procedure and
enter normal operating mode.
NORMAL OPERATION
To prepare to make measurements, power on the DTH3007SD and make sure an SD card
is firmly seated in the socket on its bottom.
The meter can make and display four kinds of measurements:
• The temperature and humidity of a fluid (simultaneously)
• The dew point temperature of ambient air
• The wet-bulb temperature of ambient air
• The temperature of a surface, as measured by a Type K or Type J thermocouple
1. To select the measurement mode
, use the FUNC./HOLD/NEXT button. Pressing the
button repeatedly cycles through the four modes. When the FUNC./HOLD/NEXT button is
released, the selected mode becomes the default until the button is pressed again.
By default, the DTH3007SD uses Celsius units for temperature measurements. To make
Fahrenheit units the default, perform Step 8 of the setup procedure.
2. To measure temperature and humidity simultaneously
, seat the temperature-
humidity probe plug (callout 1-17 of Fig. 1) in its socket (callout 1-7) on the top of the
instrument. Then press the FUNC./HOLD/NEXT button until the display shows the term
“rH”. Holding the probe by its handle, either immerse its head in the liquid whose
temperature you wish to measure, or expose the head to a representative volume of air
whose temperature and humidity you wish to measure. The upper part of the display will
show the measured relative humidity value (as “%RH”) while the lower part will show
the temperature (as “ºF” or “ºC”).
3. To measure the dew point
of ambient air, make sure the temperature-humidity probe is
seated in its socket. Then press the FUNC./HOLD/NEXT button until the lower part of the
display shows the term “dP”. The upper part of the display will show the measured dew
point value in ºF or ºC.
4. To measure the wet-bulb temperature
of ambient air, make sure the temperature-
humidity probe is seated in its socket. Then press the FUNC./HOLD/NEXT button until the
lower part of the display shows the term “_Et”. The upper part of the display will show
the measured dew point value in ºF or ºC.
5. To measure surface temperature
using a thermocouple, make sure the temperature-
humidity probe is not in its socket. Plug an optional Type K or Type J thermocouple into
its dedicated socket (callout 1-8 of Fig. 1).
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