Rotronic HygroFlex 1 Instruction Manual
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Rotronic HygroFlex 1 Instruction Manual

Hygroflex series. humidity temperature transmitter
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Humidity Temperature Transmitter
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Summary of Contents for Rotronic HygroFlex 1

  • Page 1 HygroFlex Humidity Temperature Transmitter Instruction Manual...

  • Page 2: Table Of Contents

    ________________________________________________________________________ Contents Overview ............................3 General Description........................4 Power Requirements ........................4 Probes and Probe Inputs ......................5 Analog Outputs (HygroFlex 1 and HygroFlex 3) .................7 RS232 Digital Port ........................8 HW3 Software ..........................8 RS485 Networking (HygroFlex 2 and HygroFlex 3) ..............8 Unit System..........................9 Optional Display and Keypad......................9...

  • Page 3: Overview

    LC display and keypad ROTRONIC analog probes are also accepted with some restrictions pressure probe or ROTRONIC HygroClip digital probe – some restrictions apply uses either a fixed barometric pressure value or the measurements from an analog pressure probe for those parameters that require pressure as a computational input.

  • Page 4: General Description

    LC display and keypad ROTRONIC analog probes are also accepted with some restrictions pressure probe or ROTRONIC HygroClip digital probe – some restrictions apply Uses either a fixed barometric pressure value or the measurements from an analog pressure probe for those parameters that require pressure as a computational input.

  • Page 5: Probes And Probe Inputs

    When a probe requires calibration or has to be repaired, it can be replaced with another probe in a few seconds. The ROTRONIC HygroClip digital probes are available in different configurations so as to meet the requirements of...
  • Page 6 - 6 - ________________________________________________________________________ HygroClip ID for through-wall installation max. 200° C (392° F) at sensors – wire mesh filter available with up to 700mm (27.6” ) probe length Probe Extension Cable AC1616/xxx with built-in signal booster xxx = 002 to 200 from 2 to 200 m (about 6.5ft to 656ft) max.

  • Page 7: Analog Outputs (Hygroflex 1 And Hygroflex 3)

    Use of analog probes is subject to the following restrictions and limitations: a) ROTRONIC analog humidity-temperature probes with the standard temperature output signal of – 0.5… 2.0 V = -50… 200° C: because the HygroFlex cannot read a negative voltage signal, temperature measurement is generally limited to values above freezing.

  • Page 8: Rs232 Digital Port

    ________________________________________________________________________ RS232 Digital Port The HygroFlex 1 has an internal RS232 service connector. Both the HygroFlex 2 and 3 have an external RS232 connector (located on the connector plate). In principle, any communication software can be used to interrogate and read the HygroFlex with the commands described in appendix 7 (RS232 communication protocol).

  • Page 9: Unit System

    - 9 - ________________________________________________________________________ Unit System The unit system of the HygroFlex (Metric or English) is factory programmed as specified when the instrument was ordered. The unit system can be easily be changed by the user with the optional HW3 software. Optional Display and Keypad The LC display shows which probe input is being displayed (small indicator on top of the display) and up to 2 parameters measured by the probe, with the associated engineering unit.

  • Page 10: Installation

    - 10 - ________________________________________________________________________ Installation Mechanical Installation Installation of the Transmitter Enclosure The HygroFlex includes 5 parts that can be separated one from the other: wall plate (1), electronics housing (2), electronics module (3), connector plate (4) and front cover with or without optional display and keypad (5).
  • Page 11 - 11 - ________________________________________________________________________ Probe Installation Do not remove the dust filter or slotted cap from the probe. Both sensors can easily be damaged when not protected - Install the probe at a location where humidity, temperature and pressure conditions are representative of the environment or process to be measured.

  • Page 12: Electrical Installation

    - 12 - ________________________________________________________________________ Electrical Installation Terminal Blocks The terminal blocks of the HygroFlex are of the plug-in type. If the electronics module has to be removed from the enclosure, simply unplug the terminals from the electronics module, without undoing the wiring. Electronics Module See also connector diagrams...
  • Page 13 - 13 - ________________________________________________________________________ The connectors are factory pre-wired to the terminal blocks of the electronics module. Depending on the transmitter model and options, matching connectors are shipped together with the transmitter. If the connector plate is equipped with cable grips or conduit adapters for the analog outputs and power, the wiring connections to the electronics module have to be made at the time of the installation.
  • Page 14 - 14 - ________________________________________________________________________ Electrical Diagrams (analog outputs) Before making the electrical connections, be sure to correctly identify each connector and terminal. Applying power to any of the input or output terminals can severely damage the transmitter. 12 to 35 VDC or 12 to 24 VAC supply voltage and voltage output signals 1) minimum load: 1000 ohm TB1 (2) 12…...
  • Page 15 - 15 - ________________________________________________________________________ Floating Current Outputs (option) 1) maximum load : 500 ohm, wiring included Power Supply Cable If the transmitter was supplied with cable grips, please note that the cable grips provide effective sealing only with cables having the proper outside diameter. Preferably, use a cable with an outside diameter of 6 to 7 mm (0.236 to 0.275”...

  • Page 16: Network Configuration And Wiring (Hygroflex 2 And Hygroflex 3)

    - 16 - ________________________________________________________________________ Network Configuration and Wiring (HygroFlex 2 and HygroFlex 3) The RS232 connection between the HygroFlex and a PC requires 3 wires: RX, TX and GND Without a signal booster, the maximum cable length is limited to 150 m (490 ft). 1) GND is internally connected to the power ground of the transmitter The RS485 wiring can be done with a twisted pair (2-wire, telephone type) and wall mounted RJ45 receptacles.

  • Page 17: Configuration Of The Analog Outputs

    ________________________________________________________________________ Configuration of the Analog Outputs On the HygroFlex 1 and HygroFlex 3, the type of output signal can be selected by means of two jumpers for each output. These jumpers are located on the PCB of electronics module: HygroFlex 1: to configure the temperature range and unit, use this 3-pin service connector and connect to a PC with cable # AC1623.

  • Page 18: Calculate (Hygroflex 2 And Hygroflex 3)

    The unit system (Metric or English) is factory programmed according to what was specified when the instrument was ordered. The unit system can be selected with the optional HW3 software (see separate instructions). Selections Parameter HygroFlex 1 HygroFlex 2 HygroFlex 3 ° C ° F Dew Point / Frost Point °...

  • Page 19: Display (Hygroflex 2 And Hygroflex 3)

    ADJUST M.PT (2- to 4-point adjustment against a reference environment) Definition The Adjust M.PT function permits to calibrate and adjust a ROTRONIC HygroClip digital probe against a known reference environment. This function is designed to permit calibration at 2 temperature values and at up to 4 relative humidity values.
  • Page 20 T-high and T-low should be at least 50 ° C (90 ° F) c) When calibrating relative humidity (2, 3 or 4 points) with the ROTRONIC humidity standards, always follow the sequence 35 %RH, 80 %RH, 10 %RH or 5 %RH, 0 %RH. When using a...

  • Page 21: Adjust 1Pt (1-Point Adjustment Against A Reference Environment)

    ADJUST 1PT (1-point adjustment against a reference environment) Definition The Adjust 1PT function permits to do a 1-point adjustment (offset adjustment) of a ROTRONIC HygroClip digital probe against a known reference environment. This function is limited to a simple offset adjustment that is applied across the entire measuring range.

  • Page 22: Adjust Ref (1-Point Adjustment Against A Reference Probe)

    ADJUST REF (1-point adjustment against a reference probe) Definition Note: this function is not available with the HygroFlex 1 (single probe input). When two ROTRONIC HygroClip digital probes are connected to the HygroFlex, the Adjust REF function permits to do a 1-point adjustment (both humidity and temperature) of one of the probes, using the other probe as a reference.

  • Page 23: Rs Status

    - 23 - ________________________________________________________________________ RS STATUS Definition This function displays the network address of the instrument (preceded by a letter indicating the type of instrument) as well as the RS232 configuration: baud rate, parity, number of data bits, number of stop bits. Procedure When entering the function, the network address is displayed first.

  • Page 24: Calibration With A Hygropalm Indicator

    Display the readings from any probe connected to the transmitter Display the transmitter status (configuration, serial number, etc.) 1-point adjustment of any ROTRONIC HygroClip digital probe connected to the transmitter, using the probe connected to the HygroPalm as a reference Access the functions of the transmitter, primarily the ADJUST M.PT function - see Functions.

  • Page 25: Display The Transmitter Measurements

    The definition of these functions and the procedure to be followed are the same as already described under Functions. 1) applies only to the ROTRONIC HygroClip digital probes Function ADJUST REF In the Remote Control Mode, the function Adjust REF can be used to do a 1-point adjustment of the...

  • Page 26: Environmental Limits

    - 26 - ________________________________________________________________________ Notes: Expose both probes to be to the same stable environment. Ventilation of both probes is highly recommended. Observe the readings from both probes for complete equilibration (this can be done by entering and exiting a few times the function Adjust REF so as to check both probes prior to adjusting).

  • Page 27: Specifications

    2: relative humidity and temperature HygroFlex 3 3: relative humidity, temperature and calculated parameter Analog signals (selectable) HygroFlex 1 and 3 0… 1V, 0… 5V, 0… 10V 0… 20 mA, 4… 20 mA Minimum load for voltage outputs 1000 ohm...
  • Page 28 Specify engineering units and range when ordering (both can be changed by user with optional HW3 software). See separate probe specifications regarding the different range limits Not available with the HygroFlex 1. The accuracy of the computed parameter is limited by the accuracy of the measured parameters on which it is based The standard factory setting is frost point for values below freezing.

  • Page 29: Appendix 1: Practical Advice For Measuring Humidity

    - 29 - ________________________________________________________________________ Appendix 1: Practical Advice for Measuring Humidity The most common source of error when measuring relative humidity is a difference between the temperature of the probe and the temperature of the environment. At a humidity condition of 50 %RH, a temperature difference of 1°...

  • Page 30: Appendix 3: Maintenance Of The Rotronic Probes

    Appendix 3: Maintenance of the ROTRONIC probes Cleaning or Replacing the Dust Filter of the Probe Most ROTRONIC probes come with one of the following types of dust filter: (a) protective metal base with a removable filter cartridge or (b) plastic slotted cap with built-in (not removable) filter element.

  • Page 31: Appendix 4: Calibration Basics

    If you cannot meet the above requirements, you should not attempt to calibrate temperature. Humidity Calibration ROTRONIC provides easy-to-use, certified humidity standards for those customer who do not have access to a humidity generator. To use these standards, you will need a calibration device that is suitable for your probe.
  • Page 32 ________________________________________________________________________ Certified Humidity Standards The ROTRONIC certified standards are available in boxes of 5 glass ampoules of the same value, which can be stored indefinitely. Standards in the range of 5 to 95 %RH are non- saturated aqueous salt solutions that are precisely titrated at our factory for the right concentration.

  • Page 33: Appendix 5: Humidity Definitions

    - 33 - ________________________________________________________________________ Appendix 5: Humidity Definitions Relative Humidity Relative humidity is the ratio of two pressures: %RH = 100 x p/ps where p is the actual partial pressure of the water vapor present in the ambient and ps the saturation pressure of water at the temperature of the ambient.
  • Page 34 - 34 - ________________________________________________________________________ Specific Humidity The specific humidity (also known as mass concentration or moisture content of moist air) is the ratio of the mass M of water vapor to the mass (M ) of moist air in which the mass of water vapor M is contained.

  • Page 35: Appendix 6: Dew Point Accuracy

    - 35 - ________________________________________________________________________ 1 lb = 0.4536 kg 1 BTU = 1.05507 kJ h [BTU / lb] = 0.4299 x h [kJ / kg] + 7.68 The value 7.68 is added to reference enthalpy in BTU / lb to the temperature of 0°F. Appendix 6: Dew Point Accuracy Both the HygroFlex 2 and the HygroFlex 3 use the relative humidity and temperature measurements to compute another parameter such as dew point, mixing ratio, enthalpy, etc.

  • Page 36: Appendix 7: Rs232 Communication Protocol

    The following describes the RS232 communication protocol that is used by the instruments from ROTRONIC when connected to the COM port of a PC. This information is provided for those customers who for some reason cannot use the HW3 software.
  • Page 37 Not Applicable HygroPalm 2 {u00RDD}+CR – assuming the address is 0 HygroPalm 3 {U00RDD}+CR – assuming the address is 0 HygroFlex 1 Not Applicable HygroFlex 2 {m00RDD}+CR – assuming the address is 0 HygroFlex 3 {M00RDD}+CR – assuming the address is 0...
  • Page 38 When the product ID is unknown, it can be replaced with a blank in the command. The instrument ID will be returned as part of the answer. For information on specific commands, please contact ROTRONIC. In_HyFlex.doc...

This manual is also suitable for:

Hygroflex 2Hygroflex 3

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