ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 1 of 41 Document Title AF T HM4 Humidity and Temperature Probe with Heated Sensor D R Instruction Manual © 2014; ROTRONIC AG E-M-HM4-V0_08
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 2 of 41 Document Title Table of Contents 1 Overview ............................................................................................................................................... 4 Scope .........................................................................................................................................
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 3 of 41 Document Title 10.1 Dew Point Accuracy ......................................................................................................................... 38 Accessories ........................................................................................................................................
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 4 of 41 Document Title 1 Overview The HygroMet4 (HM4) series of devices are digital humidity and temperature probes based on ROTRONIC AirChip3000 technology. The probe permits heating of the sensor during humidity and temperature measurement.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 5 of 41 Document Title 1.1 Scope This manual is valid for the HM4 probe series with firmware version V1.1. The low-order digit of the firmware version stands for minor changes, e.g. correction of errors, that do not influence the main functionality of the 1.2 AF T device.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 6 of 41 Document Title 2 Mechanical Variants and Dimensions The HM4 is a new development from ROTRONIC and comes in three variants. Connector directly at the housing Connector on remote cable AF T Cable with open ends 2.1.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 7 of 41 Document Title 3 General 3.1 Power Supply The HM4 requires a power supply of 15...24 VDC (55 mA) for full functionality, but may already be operated on 5 VDC with the following restrictions: AF T Analog output only 0...1 V RoHumiClean function only available to a limited extent (see chapter 4.1.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 8 of 41 Document Title 3.3 Calculated Parameters The HM4 can calculate all psychrometric parameters and assign them to the outputs with the HW4 software.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 9 of 41 Document Title 3.4 Analog Outputs The ROTRONIC HW4 software enables free configuration and scaling of the analog outputs. The measured values (humidity, temperature) and resultant calculated values can thus be assigned to the analog outputs (Out1, Out2) and scaled at will.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 10 of 41 Document Title The analog outputs have a resolution of 16 bit and, depending on the output variant, a maximum offset as named in the table below.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 11 of 41 Document Title 3.5 RS-485 Interface The RS-485 interface is used to connect the HM4 to a PC.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 12 of 41 Document Title 3.6 HW4 Software Compatibility The devices in the HM4 series are fully integrated in the HW4 software V3.4 and later. 3.7 Real-Time Clock AF T The HM4 probes are equipped with a battery-powered real-time clock. The button battery of the type CR-1220 guarantees clock operation for a period of about 10 years.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 13 of 41 Document Title 4 User-Specific Settings and Functions The HM4 has a variety of functions and settings that can be adapted by users to their requirements. This chapter contains an overview of all functions and their default settings. General AirChip3000 Functions AF T 4.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 14 of 41 Document Title 4.1.3 Write Protection for Device Settings Write Protection The device settings can be protected with a password. Password protection is configured with the HW4 AF T software. 4.1.4 Alarm Functions Limitation of the Humidity Value The humidity measured value can be limited to 100 %RH.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 15 of 41 Document Title 4.1.5 Sensor Heating (RoHumiHeat) The sensor heating can be operated in three different modes. Permanent Time-dependent Start Response AF T Value-dependent When changing from an unheated to a heated state, there is a transient phase in which the sensor is heated to above ambient temperature.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 16 of 41 Document Title Sensor Heating (RoHumiHeat), Time-Dependent The sensor heating can be activated cyclically. The following time intervals are available: Hourly Daily Weekly AF T Monthly The duration of the heating cycle is also freely selectable in minutes. The temperature of the heated sensor can be selected freely between 0.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 17 of 41 Document Title Sensor Heating (RoHumiHeat), Value-Dependent The sensor heating can be activated on the basis of definable temperature/humidity values.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 18 of 41 Document Title 4.1.6 Sensor Cleaning (RoHumiClean) Sensor cleaning can take place in three time intervals. Daily Weekly AF T Monthly The duration of the cleaning cycle is freely selectable in minutes. The cleaning temperature can be set up to 150 °C. No measurements are carried out during the cleaning phase.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 19 of 41 Document Title 4.2 Factory Defaults All factory defaults and functions of the HygroMet4 are described below. The HW4 software (V3.4.0 or higher) is needed to change them. The following connection cable is needed: AC3010-T (for probe with Tuchel connector) or AC3010 (for probe with open ends).
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 20 of 41 Document Title 5 Mechanical Installation 5.1 General Relative humidity is very dependent on temperature. Proper measurement of relative humidity requires that the probe and its sensor have exactly the same temperature as the environment that is to be measured.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 21 of 41 Document Title 6 Electrical Installation This sections contains general information on electrical wiring. AF T 6.1.1 General Connection Information Heavy machinery and measuring instruments should not share the same electric cables for power supply.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 22 of 41 Document Title In general, signal cables should be installed in bundles or channels / conduits, separate from other cables as indicated in the table below: Bus signals such as RS-485 Data signals for PCs, printers, etc.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 23 of 41 Document Title 6.2 Wiring This section describes the wiring of the device with connection possibilities. AF T 6.2.1 Electrical Diagrams The HM4 is connected with the 7-pin Tuchel connector or the connection cable with open ends.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 24 of 41 Document Title 6.3 Tuchel Connector Pin Configuration The HM4 probe is available with Tuchel connector. It is connected either directly at the housing or remotely at the end of a cable.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 25 of 41 Document Title 6.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 26 of 41 Document Title 7 Operation 7.1 Load Resistance Requirements of the Analog Outputs Depending on the output variant, there are different limit values for the load resistance of the analog outputs.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 27 of 41 Document Title 7.2 RS-485 Interface The HM4 has a serial RS-485 port. If the number of USB or TCP/IP network ports available is not enough, the serial RS-485 interface can be used to connect up to 64 devices in a subnet (as shown in Figure 6). ROTRONIC offers the RS-485 T-junction box AC3021 as suitable accessory for this.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 28 of 41 Document Title All functions that can be set in the device with the HW4 software are described in the manuals E-MHW4v3-Main (points 6.4 and 7.5) and E-M-HW4v3-F2-022. Only devices in the HygroClip2 generation may be interconnected in the RS-485 network. A mixed network of HygroClip1 and HygroClip2 devices is not possible.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 29 of 41 Document Title 8 Maintenance This chapter describes calibration, adjustment, validation and filter changes as well as the tools necessary for this, e.g. service cable. Service Cable AF T 8.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 30 of 41 Document Title 8.2 Calibration Both the Pt100-RTD temperature sensor used in the probe and the corresponding electronics are very stable and do not normally need to be calibrated after initial factory calibration. The long-term stability of the SMD Thermo humidity sensor from ROTRONIC is normally better than 1 %RH per year.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 31 of 41 Document Title 8.3 Filter Maintenance Depending on the application and environmental conditions, the filter must be checked from time to time and cleaned or replaced when soiled. Unscrew the filter from the probe housing and carefully pull the filter off the probe in a straight line. 2.
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 32 of 41 Document Title 9 Firmware Update The HM4 firmware can be updated with the HW4 software. Firmware updates are available for downloading on the ROTRONIC website. They are written to the HM4 probe with an AC3010, AC3010-T or AC3011 service IMPORTANT: AF T cable.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 33 of 41 Document Title 10 Technical Data General Humidity / Temperature probe Circuit type 3-wire Power Supply (V+) AF T Device type 15…24 VDC (for all output variants and functions) 5…24 VDC (only 0…1 V analog output and sensor heating available) <35 mA @ V+= 5 VDC (without sensor heating) Current consumption <55 mA @ V+= 5
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 34 of 41 Document Title Temperature Measurement Sensor Pt100 RTD, Class B 1/3 DIN Measurement range -40…85 °C, standard scale: -40…60 °C Measuring accuracy @ 23 °C ±0.1 °C Long-term stability Response time ±0.1 °C @ -40…60 °C (sensor heating switched on) ±0.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 35 of 41 Document Title Configurable Analog Outputs Output 1 Can be assigned to every parameter Default parameter Humidity Default range Per order code Output 2 Can be assigned to every parameter Temperature Default range Per order code AF T Default parameter Output 1 and output 2 0…20 mA 4…20 mA Signal type 0…1 V 0…5 V 0
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 36 of 41 Document Title Digital Interface Service Connector Interface type RS-485 Baud rate : 19,200 Parity : none Data bits :8 Stop bits :1 AF T Interface type Max. length of service cable UART (TTL Level), inside housing 5 m (16.4 ft) Sensor Heating (RoHumiHeat) Heating temperature Operating modes 0.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 37 of 41 Document Title Environmental Limits -40…85 °C / 0…100 %RH, non-condensing Housing protection grade IP65 Maximum wind velocity 20 m/s (7,870 ft /min), with filter D R AF T Operation © 2014; ROTRONIC AG E-M-HM4-V0_08
E-M-HM4-V0_08 Document Code ROTRONIC AG Bassersdorf, Switzerland Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 38 of 41 Document Title 10.1 Dew Point Accuracy The HM4 can be configured to calculate the dew point on the basis of the measurement of the relative humidity and temperature.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 39 of 41 Document Title 11 Accessories All accessories for ROTRONIC products are to be found in the manual E-M-HC2-accessories. The most important connection cables for HM4 probes are shown below: Description AF T Order Code USB/RS-485 converter with open line ends.
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 40 of 41 Document Title 12 Additional Documents Document Name Contents Accessories such as service cables, calibration accessories, filters for probes, transmitters AF T E-M-HC2-accessories E-T-AC3000-DF-V1 AirChip3000, description and main functions E-M-HW4v3-DIR List of all HW4 manuals E-M-HW4v3-Main HW4 software version 3:
ROTRONIC AG E-M-HM4-V0_08 Bassersdorf, Switzerland Document Code Unit Instruction Manual HM4 Humidity and Temperature Probe with Document Type Heated Sensor Page 41 of 41 Document Title 13 Document Versions Date Remark V0_08 May 2014 Release document D R AF T Version © 2014; ROTRONIC AG E-M-HM4-V0_08
