Vaisala HMP230 - Manual (Page 3)

HMP230 SERIES
M210225en-B User's Guide
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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.
Mounting the HMP231................................................................................ 5
3.2.2. Installing the HMP233, HMP234 and HMP235............................................ 5
3.2.3. HMP233 transmitter ................................................................................... 6
3.2.4. HMP234 transmitter ................................................................................... 7
3.2.5. HMP235 transmitter ................................................................................. 10
3.2.6. HMP237 transmitter ................................................................................. 11
3.2.7. HMP238 transmitter ................................................................................. 12
3.2.7.1. Mounting; overview .................................................................................. 13
3.2.7.2. Installing the probe through the ball valve assembly................................. 16
3.3. Grounding ............................................................................................................. 20
3.4. Electrical connections .......................................................................................... 22
3.4.1.
Connection to a 24 VAC supply ................................................................ 23
4. COMMISSIONING.............................................................................................................. 24
4.1. Changing the parameters ..................................................................................... 24
4.2. Security lock jumper ............................................................................................. 24
4.3. Selecting the analogue outputs ........................................................................... 25
4.4. Connecting the RS 232C serial bus...................................................................... 27
4.4.1.
Reverting to factory settings of the serial port........................................... 29
5. CONNECTION TO PC ........................................................................................................ 31
5.1. Giving the communication parameters ................................................................ 31
6. COMMANDS ...................................................................................................................... 34
6.1. Commands and security lock jumper .................................................................. 34
6.2. LED commands ..................................................................................................... 35
6.3. Display/keypad commands ................................................................................... 36
6.3.1.
Display mode ........................................................................................... 36
6.3.2. Command mode ...................................................................................... 36
6.3.3. Entering numbers..................................................................................... 36
6.3.4. Analogue output commands ..................................................................... 37
6.3.4.1. Selecting the output (mA/V) ..................................................................... 37
6.3.4.2. Selecting and scaling the analogue output quantities ............................... 38
6.3.5. Output via the serial bus .......................................................................... 39
6.3.5.1. Turning the serial interface echo ON/OFF ................................................ 39
6.3.5.2. Serial bus settings.................................................................................... 39
6.3.5.3. Setting the transmitter address ................................................................ 40
6.3.5.4. Selecting the output units ......................................................................... 41
6.3.5.5. Selecting the calculation mode ................................................................. 41
6.3.6. Output modes .......................................................................................... 41
6.3.6.1. Setting the serial interface operation mode .............................................. 42
6.3.7. Others...................................................................................................... 43
6.3.7.1. Setting the averaging time........................................................................ 43