Vaisala HMP46 - Manual (Page 3)

HMI41 AND PROBES
M210316EN-A Operating Manual
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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 probes ........................................................................................... 4
4. TAKING MEASUREMENTS ................................................................................................. 5
4.2 Starting the measurements .................................................................................... 5
4.2 Measurement readings on display ......................................................................... 6
4.3 HOLD-mode ............................................................................................................. 7
5. CALIBRATION ..................................................................................................................... 8
5.1 Calibration with trimmer potentiometers ............................................................... 8
5.2 Calibration with HMI41 software commands ....................................................... 10
6. HMI41 AND DATA COLLECTING ...................................................................................... 20
6.1 Entering the data collecting mode ....................................................................... 20
6.2 Manual data collecting .......................................................................................... 21
6.3 Setting the measurement duration....................................................................... 22
6.4 Setting the measurement interval ........................................................................ 22
6.5 Reading the measurement results ....................................................................... 23
7. TRANSFERRING THE STORED READINGS TO A PC ...................................................... 26
7.1 Giving the communication parameters ................................................................ 26
7.2 Transferring the data ............................................................................................ 29
8. CHANGING THE SETTINGS.............................................................................................. 33
8.1 Entering the setup mode ...................................................................................... 33
8.2 Selecting the display units ................................................................................... 34
8.3 Setting the automatic power-off function ............................................................ 34
8.4 Selecting the display quantities ........................................................................... 35
8.5 Setting the pressure for mixing ratio and wet bulb temperature calculations . 35
8.6 Selecting the probe type ....................................................................................... 36
9. MAINTENANCE ................................................................................................................. 37
9.1 Changing the HUMICAP

180 humidity sensor..................................................... 37
9.2 Chemical tolerances of the HUMICAP

180 sensor .............................................. 37
9.3 Using the HMP46 in high temperatures ............................................................... 37
9.4 Spare parts and accessories ................................................................................ 38