Vaisala HMP42 - Manual (Page 3)

HMI41 AND HMP42
M210317EN-A Operating Manual
i
Contents
1. THE HMI41 INDICATOR AND PROBES............................................................................... 1
2. TO BE NOTED IN THE MEASUREMENT OF HUMIDITY ..................................................... 3
3. GETTING STARTED ............................................................................................................ 4
3.1 Inserting the batteries............................................................................................. 4
3.2 Connecting the HMP42 probe................................................................................. 4
3.3 Starting the measurements .................................................................................... 4
3.4 Using the HMP42 for measuring equilibrium humidity in structures ................... 5
3.4.1
Example 1: measuring humidity in a bathroom .......................................... 5
3.4.2 Example 2: measuring humidity in a concrete floor.................................... 6
3.4.3 Erroneous installations .............................................................................. 7
4. HOW TO USE THE HMI41 INDICATOR AND HMP42 PROBE ............................................. 8
4.1 Turning the indicator on ......................................................................................... 8
4.2 Measurement readings on display ......................................................................... 9
4.3 HOLD-mode ........................................................................................................... 10
4.3.1
MIN-mode ............................................................................................... 10
4.3.2 MAX-mode .............................................................................................. 10
5. CALIBRATION ................................................................................................................... 11
5.1 How to use the HMP42 calibration adapter.......................................................... 11
5.2 Calibration with trimmer potentiometers ............................................................. 12
5.2.1
Humidity calibration................................................................................. 12
5.3 Calibration with HMI41 software commands ....................................................... 14
5.3.1
One point humidity calibration ................................................................. 16
5.3.2 Two point humidity calibration ................................................................. 18
5.3.3 One point temperature calibration ........................................................... 20
5.3.4 Two point temperature calibration ........................................................... 22
6. HMI41 AND DATA COLLECTING ...................................................................................... 25
6.1 Entering the data collecting mode ....................................................................... 25
6.2 Manual data collecting .......................................................................................... 26
6.3 Setting the measurement duration....................................................................... 27
6.4 Setting the measurement interval ........................................................................ 27
6.5 Reading the measurement results ....................................................................... 28
6.5.1
MIN and MAX in data collecting REC READ mode ..................................... 30
7. TRANSFERRING THE STORED READINGS TO A PC ...................................................... 31
7.1 Giving the communication parameters ................................................................ 31
7.2 Transferring the data ............................................................................................ 34
8. SETUP PROCEDURE ........................................................................................................ 37
8.1 Entering the setup mode ...................................................................................... 37
8.2 Selecting the display units ................................................................................... 38
8.3 Setting the automatic power-off function ............................................................ 39