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4.4 Site selection for measurement
Use this instrument in a place with:
•
A minimum of dust, and an absense of corrosive gasses
• No acid, alkali, organic solvent,
flammable and expolsive gasses
•
No exposure to direct sunlight, and an ambient temperature of 0 to 50 (32 to 122 )
• No condensing of the inner assembly due to rapid temperature change
•
No water, oil, chemicals or where the vapors of these substances can come into direct
contact with the instrument.
5. Measuring
5.1 Normal measuring mode
(1) Turn the power ON by pressing the POWER key.
(2) When measuring temperature, let the temperature sensor for DFT-700 (hereinafter sensor)
contact the measured object or insert to it.
When measuring temperature and humidity, put the Thermo-hygro sensor (THD-700-P) where
measuring is to be carried out.
(3) Data HOLD function
While the sensor measures the temperature, temperature data currently indicated on the display
is held by pressing the
key
While the thermo-hygro sensor (THD-700-P) is measuring temperature and humidity, thermo-hygro
data currently indicated is held indicating “D.HOLD” on the display by pressing the
key.
(Temperature is indicated on the Data display and humidity is indicated on the PV display.)
Press the
key again to cancel the Data HOLD. When Data HOLD is cancelled the indication
“D.HOLD” is put out and the mode reverts to the normal measuring mode.
(4) Peak HOLD function
While the sensor is measuring temperature, “P.HOLD” is indicated on the display and the
maximum value of the temperature data currently indicated is held by pressing the MODE
key for 1 second. While thermo-hygro sensor (THD-700-P) is measuring temperature and humidity,
“P.HOLD” is indicated on the display and the maximum value of humidity data currently indicated
and temperature data when humidity data is maximum are held.
(Temperature is indicated on the Data display and humidity is indicated on the PV display.)
When this function is selected, the indicated values are not renewed as long as temperature
and humidity do not exceed the currently indicated values.
Press the MODE key again for 1 second to cancel the Peak HOLD function.
“P.HOLD” on the display is put out and the mode reverts to the measuring mode.
(5) Memory function
A maximum of 10 (0 to 9) pieces of data can be memorized and indicated again.
• Indicated data memorization and calling
1) Press the MEMO No. key.
When the sensor is measuring temperature, the memory number “MEMO No. O”, memory data
and the data currently measured are indicated on the display and the mode turns to the memory
mode.
When the thermo-hygro sensor (THD-700-P) is measuring temperature and humidity, the
memory number “MEMO No. O” and memory data are indicated on the display for 1.5 seconds.
After 1.5 seconds the memory number “MEMO No. O” and memory data are turned off, then
the current thermo-hygro data is indicated. (These indications repeat at every 1.5 seconds.)
Data which is not memorized is represented as “
”.
2) Press the
key (hereinafter
key) while the data is indicated.
The data when the
key is pressed is memorized at the memory number “MEMO No. 0”
currently indicated.
3) The next memory number “MEMO No. 1” is indicated by pressing the MEMO No. key again.
Keep pressing the MEMO No. key until the memory number to call is indicated.
• Memory mode cancellation
Press the MEMO No. key for 2 seconds or more to cancel the memory mode.
“MEMO No. ” on the display is turned off and the memory mode is cancelled.
