--------P.3--------
Button instructions:
There are 4 buttons:
, that is MENU, UP, DOWN and OK key. Key functions as follows:
Name
MENU
UP
DOWN
OK
Functions
Set key
Up key
Down key
Ok key
Press the MENU key for 3 to 5 seconds long enough to enter setting menu, appear SET and press OK to
enter selecting mode menu, then it will appear 1-5 numbers, one number to one mode as follows:
1
Single temperature output mode
，
it only displays temperature and
temperature output signal under this kind of mode.
2
Single humidity output mode
，
it only displays humidity and humidity
output signal under this kind of mode.
3
Set temperature linear calibration mode
，
used for calibrating
temperature.
4
Set humidity linear calibration mode, used for calibrating humidity.
5
Normal working mode, it displays both temperature and humidity
output signal.
Notice under single temperature or single humidity output:
LCD will display temperature or humidity value as well as temperature or humidity output signal (4-20ma)
under single mode. At the same time, please connect the unused pin to the VCC to make sure the output
signal is correct.
Two steps for temperature linear calibration setting:
z
Entering into temperature linear calibration mode (press MENU and number 3), press OK to enter
temperature range 75% calibration point. That is the current environment temperature should be 45
℃
,
till temperature is stable (about 30mins or more), then transmitter LCD will display two-line values. The
first line displays the testing temperature U1, the second line displays 45.0. Now you can choose UP
and DOWN keys to calibrate the U1 to 45
℃
and then click OK key to confirm. So transmitter can
record the offset value under temperature of 45
℃
.
z
Then entering into temperature range 33% calibration point, that is the current temperature should be
3
℃
. Transmitter LCD will display two-line values after the temperature is stable (about 30mins or
more). The first line displays the testing temperature U2, the second line displays 3.0. Now you can
choose UP and DOWN keys to calibrate the U2 to 3
℃
and click OK key to confirm so that the
