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Rotronic HygroFlex 1 Instruction Manual

Humidity temperature transmitter
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HygroFlex
Humidity Temperature Transmitter
Instruction Manual
V 3.1

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Summary of Contents for Rotronic HygroFlex 1

  • Page 1 HygroFlex Humidity Temperature Transmitter Instruction Manual V 3.1...

  • Page 2: Table Of Contents

    Overview...............................3 General Description..........................4 Power Requirements ........................4 Probes and Probe Inputs........................5 Analogue Outputs (HygroFlex 1 and HygroFlex 3) ................7 Connection to a PC - RS232 Digital Port ..................8 HW3 Software ..........................8 RS485 Networking (HygroFlex 2 and HygroFlex 3) .................8 Unit System ............................8 Optional Display and Keypad ......................9...

  • Page 3: Overview

    LC display and keypad ROTRONIC analogue 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 analogue pressure probe for those parameters that require pressure as a computational input.

  • Page 4: General Description

    LC display and keypad ROTRONIC analogue 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 analogue 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 Use of analogue probes is subject to the following restrictions and limitations: a) ROTRONIC analogue 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 7: Analogue Outputs (Hygroflex 1 And Hygroflex 3)

    - 7 - example, if a probe with a temperature signal of 0..1 V = 0…100°C is being used, the signal resolution will be about 100 x 1 x 0.0027 = 0.27°C Analogue Outputs (HygroFlex 1 and HygroFlex 3) Model HygroFlex 1...

  • Page 8: Connection To A Pc - Rs232 Digital Port

    - 8 - Connection to a PC - 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: Optional Display And Keypad

    - 9 - 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. When relevant, the message line provides additional information. Humidity and Temperature Probe Input Indicator Calculated Value and Temperature...

  • Page 10: Installation

    - 10 - Installation Each HygroFlex transmitter is shipped in an individual box, separately from the probe. The shipping box has a label with the following information: instrument type, main specifications and serial number. An identical label is located inside of the transmitter enclosure. Installation of the Transmitter Enclosure Note: see appendix 8 for the optional metal enclosure The HygroFlex is comprised of 5 parts: mounting bracket (1), electronics housing (2), main circuit...

  • Page 11: Re-Attaching The Ribbon Cable (Cover With Optional Display And Keypad)

    - 11 - The front cover is held in place by 4 small tabs molded into the electronics housing. To remove the cover, insert a screwdriver in the V-shaped slot on top of cover and press lightly to unlock prior to pulling the cover away from the electronics housing.
  • Page 12 - 12 - Zero-insertion-force connectors are used for the ribbon cable that connects the cover and the main printed circuit board. ribbon cable (can be pulled out) zero-insertion-force connector to unlock: grab both sides of outer frame up and pull up to lock: push down outer frame printed circuit board outer frame...
  • Page 13 (for HygroPalm Calibrator) 1 : GND 2 : Digital Input Output - Optional 2 Probe Input (J3) (except HygroFlex 1) 1 : Analogue Input Signal (+) 2: GND 3 : Digital Input Output 4 : +15 VDC ±0.5 VDC - RS232/RS485 (J5) (except HygroFlex 1) 1 : RI –...
  • Page 14 - 14 - Connector Pin-Out Diagrams Note: the contact side of the female connector is the same as the solder side of the matching male connector. Probe 1 – TUCHEL T7 (7-pin female shown from contact side) Pin # Function Pin# on PCB connector J2 Temperature –...
  • Page 15 - 15 - Electrical Diagrams (analogue 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 Solder pad B18: see bottom of page 13...

  • Page 16: Configuration Of The Analogue Outputs

    Solder pad B18: see bottom of page 13 Configuration of the Analogue 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:...

  • Page 17: Electrical Installation Guidelines

    - 17 - Electrical Installation Guidelines Please see Appendix 10 for general guidelines regarding the electrical installation of this product. Serial Network Configuration (HygroFlex 2 and HygroFlex 3 only) Prior to networking the transmitters, they should be individually configured with the HW3 software (see separate instructions on the HW3 CD ROM).
  • Page 18 - 18 - Probe Installation Guidelines Connect the probe to probe input 1 (main probe input). Except for probe model IW (area monitoring), probes are connected to the HygroFlex by means of a cable (attached to the probe). Do not remove the dust filter or slotted cap from the probe. Both sensors can easily be damaged when not protected.

  • Page 19: Hygroflex Function Menu

    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 Dew Point / Frost Point °C °F...

  • Page 20: Display (Hygroflex 2 And Hygroflex 3 With Optional Lc Display)

    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 21 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 22: 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. To prevent unauthorized or accidental changes, lock the keypad (software configuration with HW3) to block out access to this function either from the keypad or from the HygroPalm calibrator.

  • Page 23: 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 probe 1, using probe 2 as a reference.

  • Page 24: Settings

    *, any user defined description for the instrument * and the serial number of the instrument. * except HygroFlex 1 This information is for display only. Some parameters such as the network address can be changed with the HW3 software, after connecting the instrument to a PC.

  • Page 25: Errors And Status Messages

    - 25 - Errors and Status Messages The following is a list of coded messages (101, etc.) that the HygroFlex may show on the bottom line of the optional LC display or via RS232 / RS485. Errors: checksum error the checksum test did not pass during RS-communication. bad command an unknown command was received disallowed command...

  • Page 26: Test Connector For The 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 27: Functions (Except Adjust M.pt And Adjust 1Pt)

    The definition of these functions and the procedure to be followed are the same as already described under HygroFlex Function Menu. 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 28: Environmental Limits

    - 28 - 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 29: Specifications

    2: relative humidity and temperature HygroFlex 3 3: relative humidity, temperature and calculated parameter Analogue 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 Maximum load for current outputs 500 ohm E_IMHygroFlex_V3.1.doc...
  • Page 30 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 31 - 31 - 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°C (1.8 °F) typically results in an error of 3 %RH on relative humidity.

  • Page 32: 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 33: 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 34 - 34 - 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 35: Appendix 5: Humidity Definitions

    - 35 - 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 vapour present in the ambient and ps the saturation pressure of water at the temperature of the ambient.
  • Page 36 - 36 - 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 vapour to the mass (M ) of moist air in which the mass of water vapour M is contained.

  • Page 37: Appendix 6: Dew Point Accuracy

    - 37 - 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. The accuracy of this conversion varies, depending on the humidity and temperature conditions. Typical accuracy for the dew point conversion is provided in the graph below: Dew Point Accuracy ±1 °C...

  • Page 38: 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 39 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 40 - 40 - Special Situations (single instrument) Using address 99 in a data request causes instruments with any address to answer. For this reason, address 99 should not be used when several instruments are connected to a network. Address 99 can be useful when trying to communicate with a single instrument of unknown address.
  • Page 41 - 41 - Appendix 8: Metal Enclosure Option As an option, the HygroFlex is available in an aluminium enclosure with a hinged cover - with or without display and keypad. The electrical connections are arranged like on the standard models. The enclosure can be attached to a wall using the flanges located on each side of the enclosure.

  • Page 42: Appendix 9: Accessories For The Hygroflex

    - 42 - Appendix 9: Accessories for the HygroFlex Order Code Description HW3 software (CD ROM) HygroPalm 1 HygroPalm 1 indicator, limited to displaying the readings from the HygroFlex HygroPalm 3 HygroPalm 3, field calibrator AC1620 Cable HygroPalm 3 to HygroFlex AC1621 Cable HygroPalm 1 to HygroFlex AC1623...

  • Page 43: Appendix 10: Electrical Installation Guidelines

    When planning an installation, the rules provided by EN 50170 should be followed under consideration of local circumstances to determine the position of machines and equipment. All ROTRONIC HygroClip products are tested for Electromagnetic Compatibility according to following European standards: EN 61000-6-3 + EN 61000-6-1 (residential)
  • Page 44 - 44 - Additional guidelines for RS-485 wiring (products with a serial interface) RS-485 Cable Using a symmetrical transmission method in combination with low capacity/ low attenuation twisted pair cables, allows extremely reliable long distance connections. The use of a high grade shielded cable avoids cross talk between the transmitted signals and also reduces the potential of external interference.

This manual is also suitable for:

Hygroflex 3Hygroflex 2

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