Vaisala HMP260 User Manual
Page 3
HMP260 SERIES
HMP260-U017en-1.5
Operating Manual
1997-11-25
i
Contents
1.
PRODUCT DESCRIPTION ......................................................................................... 1
2.
TO BE NOTED WHEN MEASURING HUMIDITY ........................................................ 3
3.
INSTALLATION.......................................................................................................... 4
3.1.
Selecting the place of installation ................................................................ 4
3.2.
Mounting ........................................................................................................ 5
3.2.1.
HMP263 transmitter ......................................................................... 6
3.2.2.
HMP264 transmitter ......................................................................... 7
3.2.3.
HMP265 transmitter ....................................................................... 10
3.3.
Grounding .................................................................................................... 11
3.4.
Electrical connections................................................................................. 13
4.
COMMISSIONING .................................................................................................... 15
4.1.
Security lock jumper ................................................................................... 15
4.2.
Selecting the analogue outputs .................................................................. 15
4.3.
Connecting the RS 232C serial bus ............................................................ 17
4.3.1.
Reverting to factory settings of the serial port ................................. 19
5.
COMMANDS ............................................................................................................ 21
5.1.
Commands and security lock jumper ......................................................... 21
5.2.
LED commands ........................................................................................... 22
5.3.
Display/keypad commands ......................................................................... 23
5.3.1.
Display mode ................................................................................. 23
5.3.2.
Command mode ............................................................................. 23
5.3.3.
Entering numbers ........................................................................... 23
5.3.4.
Analogue output commands ........................................................... 24
5.3.4.1.
Selecting the output (mA/V) ........................................................ 24
5.3.4.2.
Selecting and scaling the analogue output quantities .................. 25
5.3.5.
Output via the serial bus ................................................................. 26
5.3.5.1.
Turning the serial interface echo ON/OFF................................... 26
5.3.5.2.
Serial bus settings ...................................................................... 26
5.3.5.3.
Setting the transmitter address ................................................... 27
5.3.5.4.
Selecting the output units ........................................................... 27
5.3.6.
Output modes................................................................................. 28
5.3.6.1.
Setting the serial interface operation mode ................................. 28
5.3.7.
Others .......................................................................................... 29
5.3.7.1.
Setting the measurement integration time................................... 29
5.3.7.2.
Setting the pressure for mixing ratio and wet bulb calculations ... 29
5.3.7.3.
Setting the date .......................................................................... 30
5.3.7.4.
Setting the time .......................................................................... 30