E-M-HM4-V0_08
ROTRONIC AG
Bassersdorf, Switzerland
Document Code
Unit
HM4 Humidity and Temperature Probe with
Heated Sensor
Instruction Manual
Document Type
Page 2 of 41
Document Title
© 2014; ROTRONIC AG
Table of Contents
1
Overview ............................................................................................................................................... 4
1.1
Scope ................................................................................................................................................. 5
1.2
Background Information on the Principle of Measurement ................................................................. 5
2
Mechanical Variants and Dimensions ................................................................................................ 6
3
General ................................................................................................................................................. 7
3.1
Power Supply ..................................................................................................................................... 7
3.2
Measured Parameters ........................................................................................................................ 7
3.3
Calculated Parameters ....................................................................................................................... 8
3.4
Analog Outputs................................................................................................................................... 9
3.5
RS-485 Interface .............................................................................................................................. 11
3.6
HW4 Software Compatibility ............................................................................................................. 12
3.7
Real-Time Clock ............................................................................................................................... 12
3.8
Sensor Filter ..................................................................................................................................... 12
4
User-Specific Settings and Functions ............................................................................................. 13
4.1
General AirChip3000 Functions ....................................................................................................... 13
4.2
Factory Defaults ............................................................................................................................... 19
5
Mechanical Installation ...................................................................................................................... 20
5.1
General ............................................................................................................................................ 20
6
Electrical Installation ......................................................................................................................... 21
6.2
Wiring ............................................................................................................................................... 23
6.3
Tuchel Connector Pin Configuration................................................................................................. 24
6.4
Cable Connection with Open Ends................................................................................................... 25
7
Operation ............................................................................................................................................ 26
7.1
Load Resistance Requirements of the Analog Outputs .................................................................... 26
7.2
RS-485 Interface .............................................................................................................................. 27
8
Maintenance ....................................................................................................................................... 29
8.1
Service Cable ................................................................................................................................... 29
8.2
Calibration ........................................................................................................................................ 30
8.3
Filter Maintenance ............................................................................................................................ 31
8.4
Validation of the Analog Outputs ...................................................................................................... 31
9
Firmware Update ................................................................................................................................ 32
10
Technical Data.................................................................................................................................... 33
DRAFT
