Vaisala HMP140 - Manual (Page 3)

HMP140A SERIES
U175en-1.5 Operating Manual
1999-12-08 i
Contents
1. PRODUCT DESCRIPTION ................................................................................................... 1
2. TO BE NOTED WHEN MEASURING HUMIDITY .................................................................. 2
3. INSTALLATION.................................................................................................................... 3
3.1 Selecting the place of installation .......................................................................... 3
3.2 Mounting .................................................................................................................. 3
3.2.1
Mounting the HMP141A............................................................................. 4
3.2.2 Mounting the HMP142A............................................................................. 4
3.2.3 Mounting the HMP143A............................................................................. 5
3.3 Electrical connections............................................................................................. 6
3.4 Connectors and potentiometers on the main PCB ................................................ 7
3.5 Selecting the outputs .............................................................................................. 7
3.6 Connection to an AC supply .................................................................................. 8
4. CALIBRATION ..................................................................................................................... 9
4.1 One-point humidity calibration ............................................................................... 9
4.2 Two-point humidity calibration............................................................................... 9
4.2.1
Two-point humidity calibration procedure................................................... 9
4.3 Temperature calibration ........................................................................................ 10
4.4 Calibration table .................................................................................................... 11
5. MAINTENANCE.................................................................................................................. 11
5.1 Replacing the HUMICAP

180 sensor and the filter ............................................ 11
6. TECHNICAL DATA............................................................................................................. 12
6.1 Relative humidity................................................................................................... 12
6.2 Temperature........................................................................................................... 12
6.3 General................................................................................................................... 13
6.4 Electromagnetic compatibility .............................................................................. 14
6.4.1
Emissions................................................................................................ 14
6.4.2 Interference ............................................................................................. 14
7. SPARE PARTS AND ACCESSORIES ................................................................................ 14
APPENDIX 1: CURRENT OUTPUT MODULE
APPENDIX 2: SETTINGS OF THE LOCAL DISPLAY
APPENDIX 3: HMP143A PROBE CABLE EXTENSION
TECHNICAL DATA