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Michell Instruments Hygrosmart HS3 User Manual

Advanced rh & temperature probe
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Hygrosmart HS3
Advanced RH & Temperature Probe
User's Manual
97516 Issue 5
July 2017

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Summary of Contents for Michell Instruments Hygrosmart HS3

  • Page 1 Hygrosmart HS3 Advanced RH & Temperature Probe User’s Manual 97516 Issue 5 July 2017...
  • Page 2 Please fi ll out the form(s) below for each instrument that has been purchased. Use this information when contacting Michell Instruments for service purposes. Instrument Code Serial Number Invoice Date Location of Instrument Tag No Instrument Code Serial Number Invoice Date...
  • Page 3 © 2017 Michell Instruments This document is the property of Michell Instruments Ltd. and may not be copied or otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd.

  • Page 4: Table Of Contents

    HygroSmart HS3 User’s Manual Contents Safety ..........................vi Electrical Safety ......................vi Toxic Materials ......................vi Repair and Maintenance ....................vi Calibration ........................vi Safety Conformity ......................vi Abbreviations ........................vii Warnings .......................... viii INTRODUCTION ....................1 Operating Flexibility .................... 1 INSTALLATION ....................2 Unpacking ......................2 Probe Layout ...................... 2 Maintenance Kits ....................
  • Page 5 HygroSmart HS3 User’s Manual Figures Figure 1 HygroSmart HS3 Probe and Interchangeable Sensor ........1 Figure 2 HygroSmart HS3 Probe Packaging ...............2 Figure 3 HygroSmart HS3 Probe Layout ..............2 Figure 4 Acceptable Operating Conditions ..............4 Figure 5 Mounting Clamp (HS3-PMC) ................5 Figure 6 Probe Wall Mounting ...................5...

  • Page 6: Safety

    New, freshly calibrated sensors can be supplied quickly by Michell Instruments, or recalibration can be carried out on site using one of the Michell humidity calibration systems. Refer to Section 6.2 regarding calibration checking and adjustment of probes.

  • Page 7: Abbreviations

    HygroSmart HS3 User’s Manual Abbreviations The following abbreviations may be used in this manual: barg pressure unit (=100 kP or 0.987 atm) gauge °C degrees Celsius °F degrees Fahrenheit European Union grams grams per cubic metre kilograms Kj/kg kilojoules per kilogram...

  • Page 8: Warnings

    HygroSmart HS3 User’s Manual Warnings The following general warning listed below is applicable to this instrument. It is repeated in the text in the appropriate locations. Where this hazard warning symbol appears in the following sections, it is used to indicate areas where potentially hazardous operations need to be carried out.

  • Page 9: Introduction

    HygroSmart HS3 User’s Manual INTRODUCTION INTRODUCTION The HygroSmart HS3 is an accurate, stable and user confi gurable probe designed to provide reliable relative humidity measurement for process control in a wide range of applications. The HS3 Probe features interchangeable sensor technology ensuring minimal process downtime and a low cost of ownership.

  • Page 10: Installation

    Open the cardboard box and remove the plastic tray inside. Figure 2 HygroSmart HS3 Probe Packaging Please check that the following components are present: • HygroSmart HS3 Probe (with the interchangeable HygroSmart HS3 sensor) • Certifi cate of Calibration • Quick Start Guide •...

  • Page 11: Maintenance Kits

    HygroSmart HS3 User’s Manual INSTALLATION Maintenance Kits HS3-SCK HS3 Probe Simulator Kit Includes: - Desk-mounted confi guration kit with 1.8m cable - 3 sensor simulators (25%, 50%, 75%RH at 23°C (73°F)) - Spare probe electronics - Carry case HS3-CK HS3 Probe Confi guration Kit Includes: - Desk-mounted confi...

  • Page 12: Installation Instructions

    INSTALLATION HygroSmart HS3 User’s Manual Installation Instructions 2.4.1 Recommended Installation Environment When choosing an installation site for the probe, consider the environment around it. Ensure that the site: • is clear of nearby obstructions which could limit air circulation to the probe •...

  • Page 13: Probe Wall Mounting

    The clamp can be used to securely hold the probe body, and provides a 1/4" 20 UNC thread to mount it to a fi xed surface. It is recommended that the HygroSmart HS3 Probe is installed with the sensor and fi lter assembly facing downwards.

  • Page 14: Pressurized Environment Installation

    INSTALLATION HygroSmart HS3 User’s Manual 2.4.5 Pressurized Environment Installation The HS3 Probe is a solid assembly with no internal air cavities; this ensures that an external pressure of up to 10 barg will cause no damage to the probe. The probe can be installed into pressurized environments by two different methods: Through a vessel or duct wall using the Probe Metal Gland sealing accessory.

  • Page 15: Electrical Requirements

    HygroSmart HS3 User’s Manual OPERATION 2.4.6 Electrical Requirements The HygroSmart HS3 Probe requires a supply voltage from 5 to 28 V DC. 2.4.7 Electrical Connections The electrical connections, as seen when looking at the base of the probe, are shown...

  • Page 16: 2.4.10 Probe Ordered Confi Guration

    OPERATION HygroSmart HS3 User’s Manual 2.4.10 Probe Ordered Confi guration The confi guration code of the HS3 Probe, when ordered, defi nes its precise set up. This is detailed on the order acknowledgement & invoice documents. 2.4.11 Probe Reconfi guration If at any point in time the HS3 Probe needs reconfi...

  • Page 17: Probe Maintenance Kit Operation

    HygroSmart HS3 User’s Manual OPERATION PROBE MAINTENANCE KIT OPERATION The available Probe Maintenance Kits are detailed in Section 2.3. The operation of the Maintenance Kits is as follows: Connect the probe to the connector on the desk-mounted confi guration HS3-SCK...

  • Page 18: Measurement Data Acquisition

    OPERATION HygroSmart HS3 User’s Manual From this window the probe and sensor information can be viewed by clicking the button. Alternatively click the button on the console window to Probe info. Continue open the window. Options Figure 12 Probe and Sensor Information Screen Shot Click to close the probe information window.

  • Page 19: Probe Confi Guration

    HygroSmart HS3 User’s Manual OPERATION The two output (Output 1 and Output 2) channel units are highlighted in blue and green. In the example in Figure 14 , Output 1 (in blue) is set to RH and Output 2 (in green) is set to Temperature.

  • Page 20: Probe Adjustment

    OPERATION HygroSmart HS3 User’s Manual To change a setting, either choose defi ned values from the drop-down lists or enter values into the text boxes under the column and then click the Change settings Apply button to apply the settings.

  • Page 21: Figure 17 Probe Readings Prior To Adjustment

    HygroSmart HS3 User’s Manual OPERATION The next example will demonstrate a 3 point humidity adjustment. In this example 30, 50 and 70%RH , but any other point is also possible. (%RH and Temperature adjustment are done in the same way) Adjustment Point.

  • Page 22: Figure 18 Editing The Adjustment Table

    HygroSmart HS3 User’s Manual SENSOR REPLACEMENT Editing the Adjustment Table Figure 18 After Correction: Figure 19 Probe readings post-adjustment Adjustment Point Place the HS3-Probe together with a reference in a controlled and stable environment of ± 50%RH. Check the readings of the HS3-Probe and the reference.

  • Page 23: Figure 20 Probe Readings Prior To Adjustment

    HygroSmart HS3 User’s Manual SENSOR REPLACEMENT Figure 20 Probe readings prior to adjustment Find the nearest point in the RH Adjustment table (in this example 50) and change it into the measured reference value. (in this example 50.2). Subtract the Humidity value of the HS3-Probe from the reference value (50.2 –...

  • Page 24: Figure 22 Probe Readings Post-Adjustment

    HygroSmart HS3 User’s Manual LOOP CHECKING SIMULATION After Correction: Figure 22 Probe readings post-adjustment Adjustment Point. Place the HS3-Probe together with a reference in a controlled and stable environment of ± 70%RH. Check the readings of the HS3-Probe and the reference.

  • Page 25: Figure 24 Editing The Adjustment Table

    HygroSmart HS3 User’s Manual MAINTENANCE Subtract the Humidity value of the HS3-Probe from the reference value (69.6 – 71.3 = -1.7). • Add the outcome to the reference value (69.6 -1.7 = 67.9). • Enter this value in the corresponding fi eld of Corrected RH.

  • Page 26: Loop Checking Simulation

    HygroSmart HS3 User’s Manual MAINTENANCE Loop Checking Simulation The simulator window provides a way to change the defi ned outputs on both the RH and temperature channel. Figure 26 Simulator Window Screen Shot Enter the desired, simulated value(s) into the RH and/or temperature input text boxes and click the relevant button to apply the value.

  • Page 27: Sensor Replacement

    HygroSmart HS3 User’s Manual APPENDIX A SENSOR REPLACEMENT Remove the probe from its mounting position. Remove the M12 connector from the probe. Rotate the knurled collar in the direction indicated by the arrow, until the sensor separates from the probe.
  • Page 28 APPENDIX A HygroSmart HS3 User’s Manual Align the dot on the probe with the dot on the sensor and gently place the two together. NOTE: Do not use force! Rotate the knurled collar in opposite direction to the arrow until fi nger tight.

  • Page 29: Loop Checking Simulation

    HygroSmart HS3 User’s Manual APPENDIX A LOOP CHECKING SIMULATION When the HS3-SCK is ordered, 3 fi xed output sensors will be provided. These sensors can be identifi ed by the blue cap. Sensor Simulator Figure 27 Each sensor is factory set with a RH and T output. The 3 supplied will be: 25% @ 23°C (73°F)

  • Page 30: Maintenance

    APPENDIX A HygroSmart HS3 User’s Manual MAINTENANCE Cleaning the Filter Element It is necessary to keep the fi lter clean to ensure good airfl ow around the sensor element, and to prevent a buildup of contamination which could cause harm to the sensor.

  • Page 31: Probe Adjustment Procedure

    In order to make a valid adjustment, the probe should be exposed to a environment of stable humidity and temperature, which is also measured by an authoritative traceable reference instrument. Michell Instruments offers a number of devices suitable for the purpose, either with or without temperature control.
  • Page 32 APPENDIX A HygroSmart HS3 User’s Manual Appendix A Technical Specifi cations 97516 Issue 5, July 2017...

  • Page 33: Appendix A Technical Specifi Cations

    HygroSmart HS3 User’s Manual APPENDIX A Appendix A Technical Specifi cations Performance Specifi cations RH Measurement Range 0 to 100% RH RH Accuracy @ 23°C (73°F) ± 0.8% RH (5 to 95%RH) RH Thermal Coeffi cient <0.03% RH/°C typical RH Measurement Response Time <...

  • Page 34: Figure 30 Dimensional Drawings

    1.8 meter USB to RS485 converter cable with M12 connector Cable Dimensions HygroSmart HS3 Probe - HS3-P 144mm 5.66” 98.5mm 45.5mm 3.87” 1.79” 98.5mm 3.87” HygroSmart HS3 Probe Replacement Sensor - HS3-S-R 55.5mm 2.19” Dimensional Drawings Figure 30 97516 Issue 5, July 2017...
  • Page 35 HygroSmart HS3 User’s Manual APPENDIX B Appendix B HS3 Modbus Communications & Register Map Michell Instruments...

  • Page 36: Figure 32 Serial Port Parameters

    HygroSmart HS3 User’s Manual APPENDIX B Appendix B HS3 Modbus Communications and Register Map Communications Modbus Cable Color Comms A Brown Comms B White Blue +5 V to +28 V Black Gray Pinout Figure 31 Parameter Value Baud Rate 9600 bps...

  • Page 37: Code Examples

    HygroSmart HS3 User’s Manual APPENDIX B Code examples This example shows the raw bytes to send to the probe to request relative humidity and temperature. In this example there is one probe in the loop on address 1. Request Relative Humidity:...

  • Page 38: Register Map

    HygroSmart HS3 User’s Manual APPENDIX B Register Map Addr: Gives the (base 10) address of each 16 bit register stored in the instrument. R/W: Refer to R/W key following this table Type: Indicates the data type of the register. For complex types, a letter is indicated which corresponds to a description of the type found following this table.
  • Page 39 HygroSmart HS3 User’s Manual APPENDIX B Temperature UInt16 REG_TEMPERATURE_UNITS See Note 1 Units Reserved Customer UInt16 REG_CUSTOMER_PASSWORD See Note 2 Password 36-63 Reserved Voltage Outputs Full Scale 1000 / 2500 / UInt16 1000 REG_VOUT1_RANGE Voltage 5000 / 10000 Output 1 Type...
  • Page 40 HygroSmart HS3 User’s Manual APPENDIX B RH table in3 UInt16 REG_RH_CORR_IN3 RH table out3 UInt16 REG_RH_CORR_OUT3 RH table in4 UInt16 REG_RH_CORR_IN4 RH table out4 UInt16 REG_RH_CORR_OUT4 RH table in5 UInt16 REG_RH_CORR_IN5 RH table out5 UInt16 REG_RG_CORR_OUT5 100- Reserved Probe & Sensor Data...
  • Page 41 HygroSmart HS3 User’s Manual APPENDIX B R/W Key Value Description Always readable Always writeable Can only be read when REG_CUSTOMER_PASSWORD (register 35) contains 4660, otherwise returns 0 Can only be written when REG_CUSTOMER_PASSWORD (register 35) contains 4660, otherwise write operation is ignored...
  • Page 42 HygroSmart HS3 User’s Manual APPENDIX B Note 4 - Output 1 & 2 Min/Max The register type and divider for Output 1 Min and Output 1 Max are inherited from the parameters selected in Output 1 Type. For example, if Water Activity is selected, then the type is UInt16, and the divider is 100 as per the register map entry.
  • Page 43 HygroSmart HS3 User’s Manual APPENDIX B Register TYPE_C (Date Registers) The calibration dates are stored as 4 BCD digits in a word, 0xMMYY, where MM is a 2-digit BCD month number & YY is a 2-digit Year. Example: 0x112 = November 2025 Register TYPE_D (Sensor Firmware) The fi...
  • Page 44 HygroSmart HS3 User’s Manual APPENDIX C Appendix C Quality, Recycling & Warranty Information 97516 Issue 5, July 2017...

  • Page 45: Appendix C Quality, Recycling & Warranty Information

    HygroSmart HS3 User’s Manual APPENDIX C Appendix C Quality, Recycling & Warranty Information Michell Instruments is dedicated to complying to all relevant legislation and directives. Full information can be found on our website at: www.michell.com/compliance This page contains information on the following directives: •...
  • Page 46 HygroSmart HS3 User’s Manual APPENDIX D Appendix D Return Document & Decontamination Declaration 97516 Issue 5, July 2017...

  • Page 47: Appendix D Return Document & Decontamination Declaration

    Has the equipment been cleaned and decontaminated? NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous Work will not be carried out on any unit that does not have a completed decontamination declaration.
  • Page 48 HygroSmart HS3 User’s Manual NOTES 97516 Issue 5, July 2017...
  • Page 50 http://www.michell.com...

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