Michell Instruments Hygrosmart HS3 User Manual Download Page 37

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HygroSmart HS3 User’s Manual

Michell Instruments

APPENDIX B

B.2 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:

Address

Function

code

Start

address Hi

Start

address Lo

Length

CRC 16

X01

X03

X00

X01

X00

X01

X25

XCA

Reply HS3 Probe:

Address

Function code Byte count Data0 Hi

Data0 Lo

CRC Lo

CRC Hi

X01

X03

X02

X01

xC5

X79

X87

Request temperature:

Address Function

code

Start

addrss Hi

Start

address Lo

Length

CRC 16

X01

X03

X00

X01

X00

X01

xD5

X15

Reply HS3 Probe:

Address

Function code Byte count Data0 Hi

Data0 Lo

CRC Lo

CRC Hi

X01

X03

X02

X00

xEA

x39

xCB

Useful resources:

www.simplymodbus.ca/FAQ.htm

- excellent and easy to understand resource explaining the Modbus

protocol

www.scadacore.com/

eld-applications/programming-calculators/online-hex-converter/

- convert

raw data into various data-types, useful for troubleshooting Modbus connections

www.baseblock.com/PRODUCTS/comtestpro.htm

- free Modbus master-client for PC

Summary of Contents for Hygrosmart HS3

Page 1: ...Hygrosmart HS3 Advanced RH Temperature Probe User s Manual 97516 Issue 5 July 2017 ...

Page 2: ...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 Location of Instrument Tag No Instrument Code Serial Number Invoice Date Location of Instrument Tag No ...

Page 3: ... 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 For Michell Instruments contact information please go to www michell com HygroSmart HS3 Probe ...

Page 4: ... 4 10 Probe Ordered Configuration 8 2 4 11 Probe Reconfiguration 8 2 4 12 Probe Sensor Serialization Tracking 8 3 PROBE MAINTENANCE KIT OPERATION 9 3 1 Application Software Overview 9 3 2 Installation 9 3 3 Establishing Communications 9 3 4 Measurement Data Acquisition 10 3 5 Probe Configuration 11 3 6 Probe Adjustment 12 3 7 Loop Checking Simulation 18 4 SENSOR REPLACEMENT 19 5 LOOP CHECKING SIMU...

Page 5: ...Probe readings prior to adjustment 13 Figure 18 Editing the Adjustment Table 14 Figure 19 Probe readings post adjustment 14 Figure 20 Probe readings prior to adjustment 15 Figure 21 Editing the Adjustment Table 15 Figure 22 Probe readings post adjustment 16 Figure 23 Probe readings prior to adjustment 16 Figure 24 Editing the Adjustment Table 17 Figure 25 Probe readings post adjustment 17 Figure 2...

Page 6: ...ials The use of hazardous materials in the construction of this instrument has been minimized During normal operation it is not possible for the user to come into contact with any hazardous substance which might be employed in the construction of the instrument Care should however be exercised during maintenance and the disposal of certain parts Repair and Maintenance The instrument must be mainta...

Page 7: ...or 0 987 atm gauge C degrees Celsius F degrees Fahrenheit EU European Union g grams g m3 grams per cubic metre kg kilograms Kj kg kilojoules per kilogram lb pound mm millimetre oz ounce RH relative humidity RS485 serial data transmission standard RTU Remote Terminal Unit T temperature V Volts V DC Volts of direct current percentage inch ø diameter ...

Page 8: ...ing 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: ...veloped to be 100 customer configurable One stock unit can be set up by a customer into an application specific configuration to cover any RH demands on site This flexibility saves time and budget Adjustable zero span ranging of the RH Temperature and Calculated Hygrometric Outputs Selectable 0 to 1 2 5 5 10 V output signals 2 selectable output voltage measured RH T parameters or a choice of 5 cal...

Page 10: ... sensor Certificate of Calibration Quick Start Guide User Manual 2 2 Probe Layout The HS3 Probe with its constituent parts and physical features is detailed in the layout below 98 5mm 3 87 HygroSmart HS3 Probe Electronics HygroSmart HS3 Interchangeable Sensor HS3 PE PAA 000002 HS3 PE PAA 000001 1 2 3 4 5 6 1 M12 5 pin probe electrical connector 2 Probe serial number 3 Probe to sensor connector ali...

Page 11: ... 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 Configuration Kit Includes Desk mounted configuration kit with 1 8m cable Spare probe electronics Carry case HS3 CKL HS3 Logger Configuration Converter Cable 1 8 meters Includes 1 8 meter USB to RS485 converter cable with M12 connector ...

Page 12: ...ounding environment at the point of interest The acceptable operating conditions for the sensor are detailed in Figure 4 25 40 0 50 25 70 85 75 50 100 RH Temp C Maximum mixing ratio 250g water kg dry air Figure 4 Acceptable Operating Conditions 2 4 2 Element Filter Assembly Environment The PVDF filter element protects the sensor against particulate contamination and the effects of high velocity ai...

Page 13: ...nded that the HygroSmart HS3 Probe is installed with the sensor and filter assembly facing downwards 55 5mm 2 19 HS3 PE PAA 000002 HS3 PE PAA 000002 Figure 6 Probe Wall Mounting 2 4 4 Duct Mounting When installing the HS3 Probe into a duct ensure that the probe is inserted as far as possible into the environment to be measured 55 5mm 2 19 HS3 PE PAA 000002 HS3 PE PAA 000002 55 5mm 2 19 HS3 PE PAA ...

Page 14: ...S3 PMG is shown in Figure 6 It is designed to be installed in the wall of the pressure vessel by the M25 x 1 5 thread on the rear 1 The O ring 2 provides the pressure seal The probe can then be installed and the gland tightened until the shaft of the probe rotates with the turn of the nut 1 2 Figure 8 Probe Metal Gland For safety always ensure that the probe is tethered to the vessel wall or the g...

Page 15: ...r cables are not supplied with the Probe but can be ordered as an accessory They are available in 2 5 10 meter lengths 2 4 8 Digital Serial Output The connections for Modbus RTU over RS485 communications are detailed in Figure 10 In order to enable digital comms both pins 3 5 should be grounded See Appendix B for mire details NOTE The probe will not output digital and voltage signals simultaneousl...

Page 16: ... time the HS3 Probe needs reconfiguration this can be achieved quickly and easily by using any of the available Maintenance Kits in conjunction with the HS3 Probe Application Software 2 4 12 Probe Sensor Serialization Tracking The HS3 Probe and associated interchangeable sensor have a unique serial number and bar code identification on the body of the devices These serial numbers are also stored w...

Page 17: ... zip file to a suitable location 2 Close all currently running Windows programs 3 Launch the installer and follow the on screen instructions 3 3 Establishing Communications On launching the software the connection console will appear The connection console Figure 9 allows you to establish a communications connection between the software and HS3 Probe Choose the Modbus slave address and communicati...

Page 18: ...ose the probe information window Click the Continue button on the console window to continue on to the Options window 3 4 Measurement Data Acquisition This window can be opened from the Options window As soon as it is opened the software automatically begins collecting displaying and charting live data from the HS3 Probe Data collection occurs approximately twice a second The chart update rate is ...

Page 19: ...full scale is also displayed here Figure 14 Output Channel Example Screen Shot Errors and Warnings When probe errors or warnings are encountered they will be highlighted in the Status section and a link will appear Click the View link to launch a new window which details the errors and warnings 3 5 Probe Configuration This screen can be opened from the Options window Upon opening the current setti...

Page 20: ...ttings Figure 16 Probe Adjustment Screen Shot To change a value type within the text boxes provided and click the Apply button to apply the new value s to the HS3 Probe Important the values in point 1 to 5 must be in ascending order Values are checked before they are applied to the HS3 Probe according to a set of rules The rules are displayed on the right hand side of the window The software will ...

Page 21: ...stable environment of 30 RH 2 Check the readings of the HS3 probe and the reference The Humidity reference is reading 30 8 RH The HS3 probe reads 28 0 RH Figure 17 Probe readings prior to adjustment 3 Find the nearest point in the RH Adjustment table in this example 30 and change it into the measured reference value in this example 30 8 4 Subtract the Humidity value of the HS3 probe from the refer...

Page 22: ...t Table After Correction Figure 19 Probe readings post adjustment 2nd Adjustment Point 1 Place the HS3 Probe together with a reference in a controlled and stable environment of 50 RH 2 Check the readings of the HS3 Probe and the reference The Humidity reference is reading 50 2 RH The HS3 Probe reads 51 3 RH ...

Page 23: ...RH Adjustment table in this example 50 and change it into the measured reference value in this example 50 2 4 Subtract the Humidity value of the HS3 Probe from the reference value 50 2 51 3 1 1 5 Add the outcome to the reference value 50 2 1 1 49 1 6 Enter this value in the corresponding field of Corrected RH Figure 21 Editing the Adjustment Table ...

Page 24: ...ogether with a reference in a controlled and stable environment of 70 RH 2 Check the readings of the HS3 Probe and the reference The Humidity reference is reading 69 6 RH The HS3 Probe reads 71 3 RH Figure 23 Probe readings prior to adjustment 3 Find the nearest point in the RH Adjustment table in this example 70 and change it to the measured reference value in this example 69 6 RH ...

Page 25: ...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 field of Corrected RH Figure 24 Editing the Adjustment Table After Correction Figure 25 Probe readings post adjustment ...

Page 26: ...nd 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 Apply button to apply the value The analog output s should change accordingly The values shown on the left under Probe values are read from the probe To read refresh the screen probe values click the Read button ...

Page 27: ...ENSOR REPLACEMENT 1 Remove the probe from its mounting position 2 Remove the M12 connector from the probe 3 Rotate the knurled collar in the direction indicated by the arrow until the sensor separates from the probe 4 Remove the old sensor and prepare the replacement ...

Page 28: ...17 APPENDIX A 5 Align the dot on the probe with the dot on the sensor and gently place the two together NOTE Do not use force 6 Rotate the knurled collar in opposite direction to the arrow until finger tight NOTE No force should be needed to fit the probe ...

Page 29: ...n A probe electronics assembly is provided with the Simulator Kit A sensor simulator module can be connected to the probe in the same manner as a sensor See Section 4 for detailed instructions The simulator and probe assembly can then be connected to the loop which requires testing 5 2 Checking Programming the Simulators The application software can be used to change the output range of any of the...

Page 30: ...ensor The cleaning procedure is as follows 1 Carefully remove the filter cap from the HS3 sensor Figure 28 Filter Cap Removal 2 Flow distilled water through the filter element from the inside out Figure 29 Filter Element Cleaning 3 Flow alcohol through the filter element from the inside out 4 Using compressed air dry the filter element from the inside out If there is any doubt about the cleanlines...

Page 31: ...s Its chamber allows seven relative humidity probes of various diameters to be installed into the chamber simultaneously The probes can be powered directly from the HygroCal100 and monitored via the intuitive touch screen user interface This interface also allows the programming of a calibration profile so that a series of humidity values can be generated and held automatically for a set time peri...

Page 32: ...HygroSmart HS3 User s Manual 24 97516 Issue 5 July 2017 APPENDIX A Appendix A Technical Specifications ...

Page 33: ... Electrical Specifications Voltage Output Signals 0 1 V 0 2 5 V 0 5 V 0 10 V Digital Output Signal Modbus RTU over RS485 2 wire Electrical Thermal Coefficient 0 0004 C Load Resistance 0 1 0 2 5 V 0 5 0 10 V 10K Ω 50K Ω Supply Voltage Range 5 to 28 V DC Supply Current Consumption 5 V 28 V 4 mA 7 mA Supply Protection Protected against reverse voltage and overvoltage Configurable Calculated Scales Ra...

Page 34: ...le 2 5 10 meter assembly Product Marking Indelible laser etched alphanumeric bar coded identification Maintenance Kits Optional HS3 Probe Simulator Kit Desk mounted configuration kit 3 x sensor simulators 25 50 75 RH at 23 C 73 F spare probe electronics carry case HS3 Probe Configuration Kit Desk mounted configuration kit spare probe electronics carry case HS3 logger configuration converter Cable ...

Page 35: ...HygroSmart HS3 User s Manual Michell Instruments 27 APPENDIX B Appendix B HS3 Modbus Communications Register Map ...

Page 36: ... 2 Comms B White 3 0 V Blue 4 5 V to 28 V Black 5 0 V Gray Figure 31 Pinout Parameter Value Baud Rate 9600 bps Stop Bits 1 Data Bits 8 Parity Check None Flow Control None Figure 32 Serial Port Parameters The HS3 uses the Modbus RTU protocol to communicate All data is accessed by using Function Code 3 Read Holding Registers the byte order of the data in the responses is Big Endian AB ...

Page 37: ...o CRC Lo CRC Hi X01 X03 X02 X01 xC5 X79 X87 Request temperature Address Function code Start addrss Hi Start address Lo Length Hi Length Lo CRC 16 Lo CRC 16 Hi X01 X03 X00 X01 X00 X01 xD5 X15 Reply HS3 Probe Address Function code Byte count Data0 Hi Data0 Lo CRC Lo CRC Hi X01 X03 X02 X00 xEA x39 xCB Useful resources www simplymodbus ca FAQ htm excellent and easy to understand resource explaining th...

Page 38: ...rature R Int16 10 REG_TEMPERATURE 250 0C TO 250 0C 2 RH R UInt16 10 REG_RH 0 0 to 100 0 3 Dew Point R Int16 10 REG_DEWPOINT 364 0C to 364 0C 4 Frost Point R Int16 10 REG_FROSTPOINT 364 0C to 364 0C 5 Water Activity R UInt16 100 REG_WATER_ACTIVITY 0 000 to 1 000 6 Absolute Humidity g m3 R UInt16 10 REG_ABS_HUMIDITY 0 0 to 6553 5 7 Wet Bulb R Int16 10 REG_WET_BULB 364 0C to 364 0C 8 Enthalpy R Int16...

Page 39: ...erved Temperature Relative Humidity Calibration Correction Tables 80 Temperature table in1 RC WC Int16 10 REG_TEMP_CORR_IN1 81 Temperature table out1 RC WC Int16 10 REG_TEMP_CORR_OUT1 82 Temperature table in2 RC WC Int16 10 REG_TEMP_CORR_IN2 83 Temperature table out2 RC WC Int16 10 REG_TEMP_CORR_OUT2 84 Temperature table in3 RC WC Int16 10 REG_TEMP_CORR_IN3 85 Temperature table out3 RC WC Int16 10...

Page 40: ...0 109 Reserved Probe Sensor Data 110 Probe Firmware version R UIny16 100 REG_FIRMWARE_VERSION 111 Probe Serial number HI R TYPE_B REG_PROBE_SERIAL_HI 112 Probe serial number LO REG_PROBE_SERIAL_LO 113 Reserved 114 Probe first cal MMYY R TYPE_C REG_PROBE_FIRST_CAL 115 Probe last cal MMYY REG_PROBE_LAST_CAL 116 119 Reserved 120 Sensor Firmware version HI R TYPE_D REG_SENSOR_FIRMWARE_HI 121 Sensor Fi...

Page 41: ...ture units C 2 Temperature units F All parameters that sue temperature unit temperature dew point frost point wet bulb output settings temperature correction table will be automatically converted into the newly selected temperature unit Note 2 Customer Password Writing 4460 to this register unlocks all registers marked as RC or WC Note 3 Output 1 2 Type Value Quantity to output 1 Temperature 2 RH ...

Page 42: ...it 5 Thermistor short circuit 6 RH element open circuit 7 RH element short circuit 8 Sensor communications error 9 Input volts too low 10 Logic volts too low 11 Temperature out of range 12 RH out of range 13 Not Used 14 Customer extended access 15 Diagnostic mode enabled One or more bits are set to 1 to indicate an error or alternative mode of operation Register TYPE_B Serial Number Registers Two ...

Page 43: ...number YY is a 2 digit Year Example 0x112 November 2025 Register TYPE_D Sensor Firmware The firmware is displayed as A B C where A B C are integers in the range 0 255 A REG_SENSOR_FIRMWARE_HI 0x00FF B REG_SENSOR_FIRMWARE_LO 0xFF00 8 C REG_SENSOR_FIRMWARE_LO 0x00FF Example If REG_SENSOR_FIRMWARE_HI 0x0001 and REG_SENSOR_FIRMWARE_LO 0x0203 the the sensor firmware version is displayed as 1 2 3 ...

Page 44: ...HygroSmart HS3 User s Manual 36 97516 Issue 5 July 2017 APPENDIX C Appendix C Quality Recycling Warranty Information ...

Page 45: ...rectives Full information can be found on our website at www michell com compliance This page contains information on the following directives ATEX Directive Calibration Facilities Confl ict Minerals FCC Statement Manufacturing Quality Modern Slavery Statement Pressure Equipment Directive REACH RoHS2 WEEE2 Recycling Policy Warranty and Returns This information is also available in PDF format ...

Page 46: ...HygroSmart HS3 User s Manual 38 97516 Issue 5 July 2017 APPENDIX D Appendix D Return Document Decontamination Declaration ...

Page 47: ...hemicals YES NO Radioactive substances YES NO Other hazards YES NO Please provide details of any hazardous materials used with this equipment as indicated above use continuation sheet if necessary Your method of cleaning decontamination Has the equipment been cleaned and decontaminated YES NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins radio activity...

Page 48: ...HygroSmart HS3 User s Manual 40 97516 Issue 5 July 2017 NOTES ...

Page 49: ......

Page 50: ...http www michell com ...

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