Vaisala HMD70 User Manual
Page 3
HMD70U/Y Transmitters
U303en-1.1
Operating Manual
1997-07-31
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
3.3
Grounding ................................................................................................................ 4
3.4
Electrical connections and installation of the current module ............................. 5
3.4.1
Connection to an AC supply ...................................................................... 6
3.5
Electronics ............................................................................................................... 7
4.
CALIBRATION ..................................................................................................................... 8
4.1
One-point humidity calibration ............................................................................... 8
4.2
Two-point humidity calibration............................................................................... 8
4.2.1
Two-point humidity calibration procedure................................................... 8
4.3
Calibration table ...................................................................................................... 9
5.
MAINTENANCE.................................................................................................................... 9
5.1
Replacing the HUMICAP
180 sensor and the filter .............................................. 9
6.
TECHNICAL DATA............................................................................................................. 10
6.1
Relative humidity................................................................................................... 10
6.2
Temperature (Y model only) ................................................................................. 10
6.3
General................................................................................................................... 11
6.4
Electromagnetic compatibility .............................................................................. 12
6.4.1
Emissions................................................................................................ 12
6.4.2
Immunity ................................................................................................. 12
GUARANTEE ..................................................................................................................... 12