HK Instruments RHT-MOD Duct Series Installation Instructions

Specifications

Brand: HK Instruments
Category: Transmitter
Model: RHT-MOD Duct Series (Installation Instructions)
File Type: PDF
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Pages: 4

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Copyright HK Instruments 2021

www.hkinstruments.fi Installation version 7.0 2021 INSTALLATION INSTRUCTIONS HUMIDITY TRANSMITTERS RHT-MOD Duct Series • READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS DEVICE. •� Failure�to�observe�safety�information�and�comply�with� instructions�can�result�in�PERSONAL�INJURY,�DEATH�AND/OR� PROPERTY DAMAGE. •� To�avoid�electrical�shock�or�damage�to�equipment,�disconnect� power�before�installing�or�servicing�and�use�only�wiring�with� insulation�rated�for�full�device�operating�voltage. •� To�avoid�potential�fire�and/or�explosion�do�not�use�in�potentially� flammable�or�explosive�atmospheres. •� Retain�these�instructions�for�future�reference. •� This�product,�when�installed,�will�be�part�of�an�engineered� system�whose�specifications�and�performance�characteristics� are�not�designed�or�controlled�by�HK�Instruments.�Review� applications�and�national�and�local�codes�to�assure�that�the� installation�will�be�functional�and�safe.�Use�only�experienced�and� knowledgeable�technicians�to�install�this�device. SPECIFICATIONS Thank� you� for� choosing� an� HK� Instruments� RHT-MOD� Duct� se- ries�relative�humidity�transmitter�with�Modbus�interface.�The�RHT� -MOD�Duct�series�is�intended�for�use�in�commercial�environments� in�HVAC/R�applications. RHT-MOD�Duct�is�a�relative�humidity�transmitter�with�temperature� output�installed�in�air�ventilation�duct.�In�addition�to�these�measured� values,�RHT-MOD�Duct�calculates�various�parameters�such�as�dew� point,�mixing�ratio,�enthalpy�and�absolute�humidity.�Illuminated�dis- play�ensures�easy�readability�also�from�a�distance.�The�RHT-MOD� Duct�has�a�screwless�lid�and�an�easily�adjustable�mounting�flange� that�make�the�installation�of�the�device�easy. RHT-MOD� Duct� series� devices� are� commonly� used� to� monitor� and� control: •��Relative�humidity�and�temperature�levels�of�incoming�and�return�air� in�ventilation�system SPECIFICATIONS Performance Measurement ranges: Temperature:�-30...80�°C,�sensor Relative�humidity:�0–100�% Accuracy: Temperature:�<0.5�ºC Relative�humidity:�±2...3�%�at�0...50�°C�and�10–90�%�rH Total�error�band�includes�accuracy,�hysteresis�and temperature�effect�over�5...50�°C�and�10–90%�rH. Technical Specifications Media compatibility: Dry�air�or�non-aggressive�gases Measuring units: °C�and�%�rH Measuring element: Temperature:�NTC10k Relative�humidity:�Thermoset�polymer�capacitive sensing�element Environment: Operating�temperature:�0...50�°C Storage�temperature:�-20...70�°C Humidity:�0�to�95�%�rH,�non�condensing Physical Dimensions: Case:�119�x�95.5�x�45�mm Probe:�L=188�mm,�d=12�mm Mounting: With�flange,�adjustable�40...155�mm Weight: 150�g Materials: Case:�ABS Cover:�PC Probe:�ABS Mounting�flange:�LLPDP Protection standard: IP54 Electrical connections: � 4�spring�loaded�terminals Power�supply:� � (24�V�and�GND) � 0.2–1.5�mm2�(16–24�AWG) Modbus�RTU:� � A�and�B�line � 0.2–1.5�mm2�(16–24�AWG) Electrical Supply�voltage:�24�VAC�or�VDC�±10�% Current�consumption:�max�90�mA�(at�24�V)�+�10�mA�for� each�voltage�output Communication Protocol:�MODBUS�over�Serial�Line Transmission�Mode:�RTU Interface:�RS485 Byte�format�(11�bits)�in�RTU�mode: � Coding�System:�8-bit�binary � Bits�per�Byte: � � 1�start�bit � � 8�data�bits,�least�significant�bit�sent�� � � first � � 1�bit�for�parity � � 1�stop�bit Baud�rate:�selectable�in�configuration Modbus�address:�1−247�addresses�selectable�in configuration�menu Conformance Meets�the�requirements�for: � � CE:� � UKCA: EMC:� � 2014/30/EU� S.I.�2016/1091 RoHS:� � 2011/65/EU� S.I.�2012/3032 WEEE:� � 2012/19/EU� S.I.�2013/3113 INTRODUCTION WARNING APPLICATIONS RoHS COMPLIANT

Copyright HK Instruments 2021

www.hkinstruments.fi Installation version 7.0 2021 Tighten the screw SCHEMATICS DIMENSIONAL DRAWINGS INSTALLATION STEP 1: MOUNTING THE DEVICE 1)�Mount�the�device�in�the�desired�location�(see�step�1). 2)�Route�the�cables�and�connect�the�wires�(see�step�2). 3)�The�device�is�now�ready�for�configuration. �WARNING!�Apply�power�only�after�the�device�is�properly�wired. 1)�Select�the�mounting�location�(on�a�duct). 2)�Use�the�mounting�flange�of�the�device�as�a�template�and�mark�the� screw�holes. 3)�Mount�the�flange�on�the�duct�with�screws�(not�included).�(Figure�1a) 4)�Adjust�the�probe�to�the�desired�depth.�Ensure�that�the�end�of�the� probe�reaches�the�middle�of�the�duct.�(Figure�1b) 5)�Tighten�the�screw�on�the�flange�to�hold�the�probe�in�position. Figure 1a - Mounting a flange Figure 1b - Mounting the probe in a flange Air flow direction Air flow direction Air flow direction Air flow direction Air flow direction Strain relief facing down Figure 1c - Mounting orientation Display connection Terminal block A B 24 V GND Joystick 1 Joystick 2 Joystick 3 Select Up Down Menu buttons 95.5 88.5 45.0 188.0

Copyright HK Instruments 2021

www.hkinstruments.fi Installation version 7.0 2021 STEP 3: CONFIGURATION For�CE�compliance�a�properly�grounded�shielding�cable�is required. 1)�Unscrew�the�strain�relief�and�route�the�cable(s).� 2)�Connect�the�wires�as�shown�in�figure�2a. 3)�Tighten�the�strain�relief. A 24 V GND + Power Supply 24VDC / 24VAC Modbus A Modbus B B 1)�Activate�the�device�Menu�by�pushing�the�the�select�button�for�2� seconds.� 8)�Select�temperature�offset:�+-5�°C. Function�04�-�Read�input�register Register Parameter description Data Type Value Range 3x0001 Program�version 16�bit 0...1000 0.0...99.00 3x0003 rH�reading 16�bit 0...1000 0.0...100.0�% 3x0004 Temp.�reading 16�bit -300...800 -30.0...80.0�°C 3x0006 RH�Offset 16�bit -100...100 -10.0...10.0�%�rH 3x0007 TE�Offset 16�bit -50...50 -5.0...5.0�°C 3x0008 Dew�point 16�bit -300...800 -30.0...80.0�°C 3x0009 Absolute�humidity 16�bit 0...800 0.0...80.0�g/m³ 3x0010 Enthalpy 16�bit 0...850 0.0...85.0�kJ/kg 3x0011 Mixing�ratio 16�bit 0...800 0.0...80.0�g/kg STEP 2: WIRING DIAGRAMS Figure 2 - Wiring diagram ADDRESS 1 SELECT UP DOWN 5)�Select�the�baud�rate:�9600/19200/38400/57600. BAUD RATE 9600 SELECT UP DOWN 6)�Select�the�parity�bit:�None/Even/Odd. PARITY BIT NONE SELECT UP DOWN �7)�Select�humidity�offset:�+-10�%�rH,�Offset�feature�enables�field� calibration.�This�is�necessary�in�demanding�applications�requiring� annual�calibration.��� RH OFFSET 0.0 %RH SELECT UP DOWN TE OFFSET 0.0 °C SELECT UP DOWN 9)�Push�the�select�button�to�exit�menu. SELECT EXIT MENU SELECT 4)�Select�the�address�for�Modbus:�1...247. Configuration�of�the�RHT-MOD�Duct�series�device�consists�of� configuration�menu�options�(display�versions�only). Press�the�select�button�to�accept�changes.�Move�to�the�next�setting� by�pressing�the�down�button.�Select�the�exit�menu�to�save�the� settings.�If�the�buttons�are�unused�for�3�minutes,�the�basic�view�will� reappear�automatically,�and�the�changed�settings�are�not�saved. 2)�Select�the�value�shown�on�the�display�row�1. � (temperature�/�dew�point�/�mixing�ratio�/�enthalpy�/ � absolute�humidity�/�relative�humidity) DISPLAY ROW1 DEW POINT SELECT UP DOWN 3)�Select�the�value�shown�on�the�display�row�2. � (temperature�/�dew�point�/�mixing�ratio�/�enthalpy�/ � absolute�humidity�/�relative�humidity) SELECT UP DOWN DISPLAY ROW2 ENTHALPY Function�03�-�Read�input�holding�register Register Parameter description Data Type Value Range 4x0002 RH�Offset 16�bit -100...100 -10.0...10.0�%�rH 4x0003 TE�Offset 16�bit -50...50 -5.0...5.0�°C STEP 4: MODBUS REGISTERS CONFIGURATION continued

Copyright HK Instruments 2021

www.hkinstruments.fi Installation version 7.0 2021 WARRANTY POLICY The�seller�is�obligated�to�provide�a�warranty�of�five�years�for�the�de- livered� goods� regarding� material� and� manufacturing.� The� warranty� period�is�considered�to�start�on�the�delivery�date�of�the�product.�If�a� defect�in�raw�materials�or�a�production�flaw�is�found,�the�seller�is�ob- ligated,�when�the�product�is�sent�to�the�seller�without�delay�or�before� expiration�of�the�warranty,�to�amend�the�mistake�at�his/her�discre- tion�either�by�repairing�the�defective�product�or�by�delivering�free�of� charge�to�the�buyer�a�new�flawless�product�and�sending�it�to�the�buyer.� Delivery�costs�for�the�repair�under�warranty�will�be�paid�by�the�buyer� and�the�return�costs�by�the�seller.�The�warranty�does�not�comprise� damages�caused�by�accident,�lightning,�flood�or�other�natural�phenom- enon,�normal�wear�and�tear,�improper�or�careless�handling,�abnormal� use,�overloading,�improper�storage,�incorrect�care�or�reconstruction,� or�changes�and�installation�work�not�done�by�the�seller.�The�selection� of�materials�for�devices�prone�to�corrosion�is�the�buyer’s�responsibil- ity,�unless�otherwise�is�legally�agreed�upon.�Should�the�manufacturer� alter�the�structure�of�the�device,�the�seller�is�not�obligated�to�make� comparable� changes� to� devices� already� purchased.� Appealing� for� warranty�requires�that�the�buyer�has�correctly�fulfilled�his/her�duties� arisen�from�the�delivery�and�stated�in�the�contract.�The�seller�will�give� a�new�warranty�for�goods�that�have�been�replaced�or�repaired�within� the�warranty,�however�only�to�the�expiration�of�the�original�product’s� warranty�time.�The�warranty�includes�the�repair�of�a�defective�part� or�device,�or�if�needed,�a�new�part�or�device,�but�not�installation�or� exchange�costs.�Under�no�circumstance�is�the�seller�liable�for�damages� compensation�for�indirect�damage. RECYCLING/DISPOSAL The� parts� left� over� from� installation� should� be� recycled� according� to� your� local� instructions.� Decommissioned� devices� should� be� taken� to� a� recycling�site�that�specializes�in�electronic�waste.

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