HK Instruments RHT-MOD Duct Series User manual

Copyright HK Instruments 2017 www.hkinstruments. Installaon version 5.0 2017
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informaonandcomplywith
instrucons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
insulaonratedforfulldeviceoperangvoltage.
• Toavoidpotenalreand/orexplosiondonotuseinpotenally
ammableorexplosiveatmospheres.
• Retaintheseinstruconsforfuturereference.
• Thisproduct,wheninstalled,willbepartofanengineered
systemwhosespecicaonsandperformancecharacteriscs
arenotdesignedorcontrolledbyHKInstruments.Review
applicaonsandnaonalandlocalcodestoassurethatthe
installaonwillbefunconal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relavehumiditytransmierwithModbusinterface.TheRHT
-MODDuctseriesisintendedforuseincommercialenvironments
inHVAC/Rapplicaons.
RHT-MODDuctisarelavehumiditytransmierwithtemperature
outputinstalledinairvenlaonduct.Illuminateddisplayensures
easy readability also from a distance. The RHT-MOD Duct has a
screwlesslidandaneasilyadjustablemounngangethatmakethe
installaonofthedeviceeasy.
RHT-MOD Duct series devices are commonly used to monitor and
control:
•Relavehumidityandtemperaturelevelsofincomingandreturnair
invenlaonsystem
SPECIFICATIONS
Performance
Measurement ranges:
Temperature:0...50°C
Relavehumidity:0–100%
Accuracy:
Temperature:<0.5ºC
Relavehumidity:±2...3%at0...50°Cand10–90%rH
Totalerrorbandincludesaccuracy,hysteresisand
temperatureeectover5...50°Cand10–90%rH.
Technical Specicaons
Media compability:
Dryairornon-aggressivegases
Measuring units:
°Cand%rH
Measuring element:
Temperature:NTC10K
Relavehumidity:Thermosetpolymercapacive
sensingelement
Environment:
Operangtemperature:0...50°C
Storagetemperature:-20...70°C
Humidity:0to95%rH,noncondensing
Physical
Dimensions:
Case:119x100x44.7mm
Probe:L=188mm,d=12mm
Mounng:
Withange,adjustable0...188mm
Weight:
150g
Materials:
Case:ABS
Cover:PC
Probe:ABS
Mounngange:LLPDP
Protecon standard:
IP54
Electrical connecons:
 4springloadedterminals
Powersupply:
 (24VandGND)
 0.2–1.5mm2(12–24AWG)
ModbusRTU:
 AandBline
 0.2–1.5mm2(12–24AWG)
Electrical
Supplyvoltage:24VACorVDC±10%
Currentconsumpon:max90mA(at24V)+10mAfor
eachvoltageoutput
Communicaon
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signicantbitsent
  rst
  1bitforparity
  1stopbit
Baudrate:selectableinconguraon
Modbusaddress:1−247addressesselectablein
conguraonmenu
Conformance
MeetsrequirementsforCEmarking:
EMCDirecve:2014/30/EU
RoHSDirecve:2011/65/EU
WEEEDirecve:2012/19/EU
INTRODUCTION WARNING
APPLICATIONS
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
RoHS 2
2011/65/EU

Copyright HK Instruments 2017 www.hkinstruments. Installaon version 5.0 2017
Tighten the
screw
SCHEMATICS
DIMENSIONAL DRAWINGS
INSTALLATION
STEP 1: MOUNTING THE DEVICE
1)Mountthedeviceinthedesiredlocaon(seestep1).
2)Routethecablesandconnectthewires(seestep2).
3)Thedeviceisnowreadyforconguraon.
WARNING!Applypoweronlyaerthedeviceisproperlywired.
1)Selectthemounnglocaon(onaduct).
2)Usethemounngangeofthedeviceasatemplateandmarkthe
screwholes.
3)Mounttheange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angetoholdtheprobeinposion.
Figure 1a - Mounng a ange
Figure 1b - Mounng the probe in a ange
Air flow direcon Air flow direcon
Air flow direcon Air flow direcon Air flow direcon
Strain relief facing down
Figure 1c - Mounng orientaon
Display connecon
Terminal block
A
B
24 V
GND
Joysck 1
Joysck 2
Joysck 3
Select
Up
Down
Menu buons

Copyright HK Instruments 2017 www.hkinstruments. Installaon version 5.0 2017
STEP 3: CONFIGURATION
STEP 4: MODBUS REGISTERS
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gure2a.
3)Tightenthestrainrelief.
A
24 V
GND
+ Power Supply
24VDC / 24VAC
Modbus A
Modbus B
B
WARRANTY POLICY
Thesellerisobligatedtoprovideawarrantyofveyearsforthedeliv-
ered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produconawisfound,thesellerisobligated,when
theproductissenttothesellerwithoutdelayorbeforeexpiraonof
thewarranty,toamendthemistakeathis/herdiscreoneitherbyre-
pairingthedefecveproductorbydeliveringfreeofchargetothebuy-
eranewawless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, ood or other natural phenomenon, normal wear
andtear,improperorcarelesshandling,abnormaluse,overloading,im-
properstorage,incorrectcareorreconstrucon,orchangesandinstal-
laonworknotdonebythesellerorhis/herauthorizedrepresentave.
Theseleconofmaterialsfordevicespronetocorrosionisthebuyer’s
responsibility,unlessotherwiseislegallyagreedupon.Shouldtheman-
ufacturer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fullledhis/herdues
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expiraonoftheoriginalproduct’s
warrantyme.Thewarrantyincludestherepairofadefecvepartor
device, orifneeded,a new partordevice,butnotinstallaonorex-
change costs. Underno circumstanceisthe seller liable fordamages
compensaonforindirectdamage.
1)AcvatethedeviceMenubypushingthetheselectbuonfor2
seconds.
2)SelecttheaddressforModbus:1...247.
ADDRESS
99
SELECT
UP
DOWN
3)Selectthebaudrate:9600/19200/38400.
BAUD RATE
9600
SELECT
UP
DOWN
3)Selecttheparitybit:None/Even/Odd.
PARITY BIT
NONE
SELECT
UP
DOWN
4)Pushtheselectbuontoexitmenu.
SELECT
EXIT MENU SELECT
Funcon04-Readinputregister
Register Parameter descripon 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 Temperaturereading 16bit 0...500 0.0...50.0°C
STEP 2: WIRING DIAGRAMS
RECYCLING/DISPOSAL
The parts le over from installaon should be
recycled according to your local instrucons.
Decommissioned devices should be taken to a
recyclingsitethatspecializesinelectronicwaste.
Figure 2 - Wiring diagram