Manual
E-M-HF3-V1_22
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroFlex HF3 Transmitters and Thermo-
hygrostats: User Guide
Instruction Manual
Document Type
Page
2 of 27
Document title
© 2009-2011; Rotronic AG E-M-HF3-V1_22
Table of contents
1 Overview ............................................................................................................................................... 3
2 Mechanical configurations and dimensions ..................................................................................... 4
2.1 Display option ..................................................................................................................................... 5
3 General description ............................................................................................................................. 5
3.1 Power supply ...................................................................................................................................... 5
3.2 Measured parameters ........................................................................................................................ 5
3.3 Calculated parameters ....................................................................................................................... 6
3.4 Analog output signals (HF32 and HF33) ............................................................................................ 6
3.5 Relay outputs (HF34) ......................................................................................................................... 6
3.6 Service connector ............................................................................................................................... 7
3.7 Sensor protection (dust filter) ............................................................................................................. 7
4 User configurable settings and functions ......................................................................................... 7
4.1 Function overview .............................................................................................................................. 7
4.2 Factory default settings ...................................................................................................................... 9
5 Mechanical installation ...................................................................................................................... 10
5.1 General guidelines ........................................................................................................................... 10
5.2 Type D – through wall mount ........................................................................................................... 10
5.3 Type W – surface mount .................................................................................................................. 10
5.4 Type R and S – surface mount ......................................................................................................... 11
6 Electrical installation ......................................................................................................................... 12
6.1 General guidelines ........................................................................................................................... 12
6.2 Cable grip and cable specifications .................................................................................................. 13
6.3 Wiring ............................................................................................................................................... 13
7 Operation ............................................................................................................................................ 18
7.1 Minimum load requirements for the HF33 with voltage outputs ........................................................ 18
7.2 HF34 thermo-hygrostat .................................................................................................................... 19
8 Maintenance ....................................................................................................................................... 21
8.1 Service cable .................................................................................................................................... 21
8.2 Location of the service connector (mini-USB type)........................................................................... 21
8.3 Periodic calibration check ................................................................................................................. 22
8.4 Cleaning or replacing the dust filter (type D and W) ......................................................................... 22
9 Firmware updates .............................................................................................................................. 22
10 Technical data .................................................................................................................................... 23
10.1 Specifications ................................................................................................................................... 23
10.2 Dew point accuracy .......................................................................................................................... 26
11 Accessories ........................................................................................................................................ 27
12 Supporting documents ...................................................................................................................... 27
13 Document releases ............................................................................................................................ 27