©2018; Rotronic AG    E-M-HC2 Probes-V1_39 
Table of contents 
1  Overview ................................................................................................................................................. 3 
1.1  Hardware and software compatibility ................................................................................................... 3 
2  Models .................................................................................................................................................... 4 
3  General description ............................................................................................................................. 25 
3.1  Power supply...................................................................................................................................... 25 
3.2  Measured parameters ........................................................................................................................ 25 
3.3  Calculated parameters ....................................................................................................................... 25 
3.4  Analog output signals ......................................................................................................................... 25 
3.5  Digital interface .................................................................................................................................. 26 
3.6  Connector .......................................................................................................................................... 28 
3.7  Sensor protection (dust filter) ............................................................................................................. 28 
4  User configurable settings and functions ......................................................................................... 29 
4.1  Function overview .............................................................................................................................. 30 
4.2  Factory default settings ...................................................................................................................... 32 
5  Mechanical installation ....................................................................................................................... 33 
5.1  General guidelines for fixed installation .............................................................................................. 33 
6  Electrical installation ........................................................................................................................... 34 
6.1  General guidelines for fixed installation .............................................................................................. 34 
6.2  Analog signal wiring ........................................................................................................................... 35 
6.3  Minimum analog output load .............................................................................................................. 35 
6.4  Digital signal wiring ............................................................................................................................ 35 
6.5  Grounding .......................................................................................................................................... 35 
7  Operation .............................................................................................................................................. 36 
7.1  Operation with an indicator, data logger or transmitter ....................................................................... 36 
7.2  Stand-alone operation as an analog probe ........................................................................................ 36 
7.3  Connectivity examples for stand-alone probes................................................................................... 37 
7.4  Hand-held probes used with an indicator ........................................................................................... 38 
8  Maintenance ................................................................................................ ......................................... 39 
8.1  Cleaning or replacing the dust filter .................................................................................................... 39 
8.2  Periodic calibration check .................................................................................................................. 39 
8.3  Validation of the output signals transmission ..................................................................................... 40 
9  Firmware updates ................................................................................................................................ 41 
10 Technical data ...................................................................................................................................... 42 
10.1 Specifications ..................................................................................................................................... 42 
10.2 Dew point accuracy ............................................................................................................................ 47 
10.3 Effect of cable temperature on the accuracy of probes HC2-C04 and HC2-C05 ............................... 48 
11 Accessories and parts ........................................................................................................................ 49 
12 Supporting documents ....................................................................................................................... 50 
13 Document releases .............................................................................................................................. 51