HUMIDITY TRANSMITTERS
RHT Series

INSTALLATIONINSTRUCTIONSWARNINGINTRODUCTION$_-mho=ou1_oovbm]-mmv|ul;m|v!$v;ub;vu;Ѵ-ঞ;_lb7b||u-mvlb;uĺ$_;!$v;ub;vbvbm|;m7;7=ouv;bm1oll;u1b-Ѵ;mbuoml;m|vbm(ņ!-rrѴb1-ঞomvĺ$_;!$v;ub;vl;-vu;vu;Ѵ-ঞ;_lb7b|Őuő-m7|;lr;u-|u;Ő$őĺ-1_l;-vu;l;m|r-u-l;|;uŐuķ$ő_-v-v;r-u-|;C;Ѵ71omC]u-0Ѵ;o|r|ĺ$_; !$ v;ub;v u;Ѵ-ঞ; _lb7b| |u-mvlb;uv -u; --bѴ-0Ѵ; b|_
o70v1omC]u-ঞomķu;Ѵ--m7|o1_v1u;;m7bvrѴ-ĺ• READ THESE INSTRUCTIONS CAREFULLY BEFOREATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
Ŏ -bѴu;|oo0v;u;v-=;|bm=oul-ঞom-m71olrѴb|_bmv|u1ঞomv1-mu;vѴ|bm !"&!+ķ $ ņ!PROPERTY DAMAGE.
Ŏ $o-ob7;Ѵ;1|ub1-Ѵv_o1hou7-l-];|o;tbrl;m|ķ7bv1omm;1|
ro;u0;=ou;bmv|-ѴѴbm]ouv;ub1bm]-m7v;omѴbubm]b|_
bmvѴ-ঞomu-|;7=ou=ѴѴ7;b1;or;u-ঞm]oѴ|-];ĺ
Ŏ $o-ob7ro|;mঞ-ѴCu;-m7ņou;rѴovbom7omo|v;bmro|;mঞ-ѴѴY-ll-0Ѵ;ou;rѴovb;-|lovr_;u;vĺ
Ŏ !;|-bm|_;v;bmv|u1ঞomv=ou=|u;u;=;u;m1;ĺ
Ŏ $_bvruo71|ķ_;mbmv|-ѴѴ;7ķbѴѴ0;r-u|o=-m;m]bm;;u;7vv|;l_ov;vr;1bC1-ঞomv-m7r;u=oul-m1;1_-u-1|;ubvঞ1v
-u;mo|7;vb]m;7ou1om|uoѴѴ;70mv|ul;m|vĺ!;b;
-rrѴb1-ঞomv-m7m-ঞom-Ѵ-m7Ѵo1-Ѵ1o7;v|o-vvu;|_-||_;
bmv|-ѴѴ-ঞombѴѴ0;=m1ঞom-Ѵ-m7v-=;ĺ&v;omѴ;r;ub;m1;7-m7
hmoѴ;7];-0Ѵ;|;1_mb1b-mv|obmv|-ѴѴ|_bv7;b1;ĺ

APPLICATIONS!$v;ub;v7;b1;v-u;1ollomѴv;7|olomb|ouĹŎ_lb7b|-m7|;lr;u-|u;Ѵ;;ѴvbmoL1;vķr0Ѵb1vr-1;vķ_ovrb|-Ѵvķl;;ঞm]uoolv-m71Ѵ-vvuoolv
SPECIFICATIONSŎ_lb7b|-m7|;lr;u-|u;bm-ubov1oll;u1b-Ѵ-rrѴb1-ঞomv
Ŏ_lb7b|-m7|;lr;u-|u;bm(ņ!;mbuoml;m|

SPECIFICATIONS
Performance
Measurement ranges:$;lr;u-|u;ĹƏĺĺĺƔƏŦ!;Ѵ-ঞ;_lb7b|ĹƏŋƐƏƏѷ
Accuracy:$;lr;u-|u;ĹƺƏĺƔ!;Ѵ-ঞ;_lb7b|ĹƼƑĺĺĺƒѷ-|ƏĺĺĺƔƏŦ-m7ƐƏŋƖƏѷu$o|-Ѵ;uuou0-m7bm1Ѵ7;v-11u-1ķ_v|;u;vbv-m7|;lr;u-|u;;@;1|o;uƔĺĺĺƔƏŦ-m7ƐƏŋƖƏѷuĺ

$;1_mb1-Ѵ"r;1bC1-ঞomv
;7b-1olr-ঞ0bѴb|Ĺu-buoumomŊ-]]u;vvb;]-v;v
;-vubm]mb|vĹŦ-m7ѷu
;-vubm];Ѵ;l;m|Ĺ
$;lr;u-|u;Ĺ|ƐƏƏƏ!;Ѵ-ঞ;_lb7b|Ĺ$_;ulov;|roѴl;u1-r-1bঞ;v;mvbm];Ѵ;l;m|mbuoml;m|Ĺ
r;u-ঞm]|;lr;u-|u;ĹƏĺĺĺƔƏŦ"|ou-];|;lr;u-|u;ĹŊƑƏĺĺĺƕƏŦlb7b|ĹƏ|oƖƔѷuķmom1om7;mvbm]

_vb1-ѴѴ;1|ub1-Ѵbl;mvbomvĹ-v;ĹƖƖƖƏƒƑll);b]_|ĹƐƔƏ]omঞm]Ĺƒv1u;_oѴ;vvѴo;7ķƒĺѶll
-|;ub-ѴvĹ-v;Ĺ"uo|;1ঞomv|-m7-u7ĹƑƏbvrѴ-Őrঞom-Ѵő$o1_v1u;;m"b;ĹƕƕĺƓƔƑĺƓll
Ѵ;1|ub1-Ѵ1omm;1ঞomvĹo;uvrrѴĹƔŊv1u;|;ulbm-Ѵ0Ѵo1hŐƑƓ(ķ ķuķ$ķőƏĺƑŋƐĺƔll2ŐƐƑŋƑƓ)ő!;Ѵ-o|ĹƒŊv1u;|;ulbm-Ѵ0Ѵo1hŐķķőƏĺƑŋƐĺƔll2ŐƐƑŋƑƓ)őmr|ĹƑƓ(ou( ķƼƐƏѷuu;m|1omvlrঞomĹl-ƖƏlŐ-|ƑƓ(őƳƐƏl=ou;-1_oѴ|-];o|r|ouƑƏl=ou;-1_1uu;m|o|r|$;lr;u-|u;o|r|vb]m-ѴĹƏŋƐƏ(ķ!ƻƐhÐƑŋƐƏ(ķ!ƻƐhÐƓŋƑƏlķ!ƺƔƏƏÐ!;Ѵ-ঞ;_lb7b|o|r|vb]m-ѴĹƏŋƐƏ(ķ!ƻƐhÐƑŋƐƏ(ķ!ƻƐhÐƓŋƑƏlķ!ƺƔƏƏÐ!;Ѵ-o|Ĺ" $!;Ѵ-ķƑƔƏ(ņƒƏ( ņѵ
7fv|-0Ѵ;vb|1_bm]robm|-m7_v|;u;vbv

Conformance
;;|vu;tbu;l;m|v=ou l-uhbm]Ĺ
 bu;1ঞ;ƑƏƐƓņƒƏņ &!o" bu;1ঞ;ƑƏƐƐņѵƔņ &(  bu;1ঞ;ƑƏƐƓņƒƔņ &) bu;1ঞ;ƑƏƐƑņƐƖņ &COMPANY WITH
MANAGEMENT SYSTEMCERTIFIED BY DNV GL= ISO 9001 = ISO 14001 =Copyright HK Instruments 2017ĺ_hbmv|ul;m|vĺC

RoHS 2
2011/65/EUmv|-ѴѴ-ঞom;uvbomƔĺƏƑƏƐƕ

SCHEMATICSINSTALLATIONƐőom||_;7;b1;bm|_;7;vbu;7Ѵo1-ঞomŐv;;v|;rƐőĺƑő!o|;|_;1-0Ѵ;v-m71omm;1||_;bu;vŐv;;v|;rƑőĺƒő$_;7;b1;bvmou;-7=ou1omC]u-ঞomĺ

Display lockingjumper)!ĴrrѴro;uomѴ-[;u|_;7;b1;bvruor;uѴbu;7ĺ
Terminal block
Terminal block for relay
Contact pins forterminal block

STEP 1: MOUNTING THE DEVICEƐő";Ѵ;1|-lomঞm]Ѵo1-ঞomom|_;-ѴѴ-|ƐĺƑŋƐĺѶlŐƓŋѵ[ő-0o;|_;Yoou-m7-|Ѵ;-v|ƔƏ1lŐƑƏbmő=uol|_;-7f-1;m|-ѴѴĺo1-|;|_;mb|bm-m-u;-b|_]oo7;mঞѴ-ঞom-m7-m-;u-];
|;lr;u-|u;ķ_;u;b|bѴѴ0;u;vromvb;|o1_-m];v|o|_;uool
1om7bঞomvĺ$_;!$l-0;lom|;7om-Y-|vu=-1;ĺ

Jumpers
Contact pins forrelay terminal

DIMENSIONAL DRAWINGS
99.032.0omo|Ѵo1-|;|_;!$_;u;b|1-m0;-@;1|;70ĹŎ bu;1|vmѴb]_|Ŏ u-[vou7;-7-u;-v0;_bm77oouvŎ!-7b-m|_;-|=uol-rrѴb-m1;vŎom1;-Ѵ;7rbr;vou1_blm;v
Ŏ|vb7;-ѴѴvoum_;-|;7ņm1ooѴ;7-u;-v

90.0

Ƒő&v;|_;7;b1;-v-|;lrѴ-|;-m7l-uh|_;v1u;_oѴ;vĺƒőom||_;-ѴѴrѴ-|;b|_v1u;vĺŎm1ouu;1|bmv|-ѴѴ-ঞoml-1-v;-v_b[bm|;lr;u-|u;o|r|b]u;ƐŊ"u=-1;lomঞm]

83.0

45.0

14.0

49.5

Ø4.0

Copyright HK Instruments 201718.0ĺ_hbmv|ul;m|vĺCmv|-ѴѴ-ঞom;uvbomƔĺƏƑƏƐƕ

STEP 2: WIRING DIAGRAMSWIRING DIAGRAMS CONTINUED

&$Ĵb]u;Ƒ0Ŋ)bubm]7b-]u-lĹo;ubmr|şvb]m-Ѵo|r|Ŏ ou 1olrѴb-m1;ķ-ruor;uѴ]uom7;7v_b;Ѵ7bm]1-0Ѵ;bv
u;tbu;7ĺŎ&v;1orr;ubu;omѴĺmvѴ-|;oubu;m|-ѴѴmv;7Ѵ;-7vĺŎ"rrѴ-v;r-u-|;1-0Ѵ;=ouu;Ѵ--m7vb]m-Ѵo|_;mvbm]Ѵbm;
oѴ|-];|oro;u|_;u;Ѵ-ĺŎmbubm]l-1-uu|_;=ѴѴor;u-ঞm]Ѵbm;oѴ|-];1uu;m|0-v;7
omC;Ѵ7bmv|-ѴѴ-ঞomĺ$_;1o;uѴo1hbm]v1u;lv|0;bmv|-ѴѴ;7b=|_;Ѵbm;oѴ|-];bvvrrѴb;7|o|_;u;Ѵ-ĺŎ-u;v_oѴ70;v;7|o-ob7;Ѵ;1|uov|-ঞ17bv1_-u];|o|_;7;b1;ĺ
Ŏ$_bvmb|_-v1omC]u-ঞomflr;uvĺ+ol-m;;7|ou;1omC]u;
|_bv7;b1;=ouou-rrѴb1-ঞomĺ24 VGNDNC

Output 0/2–10 V / 4–20 mA

rH
Temp

Output 0/2–10 V / 4–20 mAb]u;Ƒ1Ŋ)bubm]7b-]u-lĹ!;Ѵ-NCƐő!o|;|_;1-0Ѵ;v|_uo]_|_;vt-u;or;mbm]bm|_;0-1hrѴ-|;ou
=ouvu=-1;bubm]v;Ѵ;1|-hmo1ho|om|_;|orou0oolo=|_;
-ѴѴrѴ-|;ķ-vv_ombm b]u;Ƒ-ĺƑőomm;1||_;bu;v-vv_ombm b]u;Ƒ0-m7Ƒ1ĺb]u;Ƒ-Ŋ!oঞm]|_;1-0Ѵ;v+COMNOSTEP 3: CONFIGURATION
omC]u-ঞomo=|_;!$v;ub;v7;b1;1omvbv|vo=ĹƐőomC]ubm]|_;flr;uvŐv;;v|;rƓőĺƑőomC]u-ঞoml;morঞomvĺŐ bvrѴ-;uvbomvomѴĺ";;|_;v;ul-m-Ѵ=ou=u|_;u7;|-bѴvĺőb]u;ƒŊlr;ubmv|-ѴѴ-ঞom
Wires can be routed through the square opening in the back plate

No jumper
Circuit open

Jumper installed
Circuit closed

Jumper stored(Grey colour indicates that a jumper is installed)

Wires can be routed through the top knockouts)bu;v1-m0;uo|;7|_uo]_|_;0oolhmo1ho|v

Copyright HK Instruments 2017ĺ_hbmv|ul;m|vĺCmv|-ѴѴ-ঞom;uvbomƔĺƏƑƏƐƕ

STEP 4: SELECTING THE OUTPUT MODE

RECYCLING/DISPOSALƐőomC]u-ঞomo=|_;o|r|lo7;vo=ĹŎ!;Ѵ-ঞ;_lb7b|ŐuőŎ$;lr;u-|u;Ő$;lrő

$_; r-u|v Ѵ;[ o;u =uol bmv|-ѴѴ-ঞom v_oѴ7 0;
u;11Ѵ;7 -11ou7bm] |o ou Ѵo1-Ѵ bmv|u1ঞomvĺ;1ollbvvbom;7 7;b1;v v_oѴ7 0; |-h;m |o -u;11Ѵbm]vb|;|_-|vr;1b-Ѵb;vbm;Ѵ;1|uomb1-v|;ĺ

";Ѵ;1||_;o|r|lo7;ķ1uu;m|ŐƓŋƑƏlőouoѴ|-];ŐƏŋƐƏ(őķ0bmv|-ѴѴbm]flr;uv-vv_ombm b]u;Ɠĺo|_o|r|vķ
u;Ѵ-ঞ;_lb7b|ķ-m7|;lr;u-|u;-u;1omC]u;7v;r-u-|;Ѵĺ$ov;Ѵ;1|ƑŋƐƏ(o|r|lo7;om-7bvrѴ-;uvbom7;b1;Ĺ buv|ķ
v;Ѵ;1|ƏŋƐƏ(o|r|0flr;uŐvőķ|_;m1_-m];|_;oѴ|-];Ő(őo|r|=uolƏŋƐƏ(|oƑŋƐƏ(b-|_;1omC]u-ঞoml;mĺѴ;-v;
v;;|_;v;ul-m-Ѵ=oulou;7;|-bѴvĺb]u;Ɠlr;ubmv|-ѴѴ;7|o|_;Ѵ;[vb7;rbmvĹ0–10 V output selectedNArHTemp
0–10 V 4–20 mA

lr;ubmv|-ѴѴ;7|o|_;ub]_|vb7;rbmvĹ
4–20 mA output selectedNArHTemp
0–10 V 4–20 mA";1om7flr;ubmv|-ѴѴ;7|o|_;ub]_|vb7;rbmvĹ
4–20 mA output selected for rH$_bu7flr;ubmv|-ѴѴ;7|o|_;Ѵ;[vb7;rbmv
0–10 V output selected for temperature
NArH
Temp

WARRANTY POLICY$_;v;ѴѴ;ubvo0Ѵb]-|;7|oruob7;--uu-m|o=C;;-uv=ou|_;7;Ѵb;u;7]oo7vu;]-u7bm]l-|;ub-Ѵ-m7l-m=-1|ubm]ĺ$_;-uu-m|r;ubo7
bv1omvb7;u;7|ov|-u|om|_;7;Ѵb;u7-|;o=|_;ruo71|ĺ=-7;=;1|bmu-l-|;ub-Ѵvou-ruo71ঞomY-bv=om7ķ|_;v;ѴѴ;ubvo0Ѵb]-|;7ķ_;m|_;ruo71|bvv;m||o|_;v;ѴѴ;ub|_o|7;Ѵ-ou0;=ou;;rbu-ঞomo=|_;-uu-m|ķ|o-l;m7|_;lbv|-h;-|_bvņ_;u7bv1u;ঞom;b|_;u0u;r-bubm]|_;7;=;1ঞ;ruo71|ou07;Ѵb;ubm]=u;;o=1_-u];|o|_;0;u-m;Y-Ѵ;vvruo71|-m7v;m7bm]b||o|_;0;uĺ ;Ѵb;u1ov|v
=ou|_;u;r-bum7;u-uu-m|bѴѴ0;r-b70|_;0;u-m7|_;u;|um
1ov|v0|_;v;ѴѴ;uĺ$_;-uu-m|7o;vmo|1olrubv;7-l-];v1-v;70
-11b7;m|ķ Ѵb]_|mbm]ķ Yoo7 ou o|_;u m-|u-Ѵ r_;mol;momķ moul-Ѵ ;-u-m7|;-uķblruor;uou1-u;Ѵ;vv_-m7Ѵbm]ķ-0moul-Ѵv;ķo;uѴo-7bm]ķblruor;uv|ou-];ķbm1ouu;1|1-u;ouu;1omv|u1ঞomķou1_-m];v-m7bmv|-ѴѴ-ঞomouhmo|7om;0|_;v;ѴѴ;uou_bvņ_;u-|_oub;7u;ru;v;m|-ঞ;ĺ$_;v;Ѵ;1ঞomo=l-|;ub-Ѵv=ou7;b1;vruom;|o1ouuovbombv|_;0;uĽvu;vromvb0bѴb|ķmѴ;vvo|_;ubv;bvѴ;]-ѴѴ-]u;;7romĺ"_oѴ7|_;l-m=-1|u;u-Ѵ|;u|_;v|u1|u;o=|_;7;b1;ķ|_;v;ѴѴ;ubvmo|o0Ѵb]-|;7|ol-h;1olr-u-0Ѵ;1_-m];v|o7;b1;v-Ѵu;-7ru1_-v;7ĺrr;-Ѵbm]=ou
-uu-m|u;tbu;v|_-||_;0;u_-v1ouu;1|Ѵ=ѴCѴѴ;7_bvņ_;u7ঞ;v
-ubv;m=uol|_;7;Ѵb;u-m7v|-|;7bm|_;1om|u-1|ĺ$_;v;ѴѴ;ubѴѴ]b;
-m;-uu-m|=ou]oo7v|_-|_-;0;;mu;rѴ-1;7ouu;r-bu;7b|_bm|_;-uu-m|ķ_o;;uomѴ|o|_;;rbu-ঞomo=|_;oub]bm-Ѵruo71|Ľv
-uu-m|ঞl;ĺ$_;-uu-m|bm1Ѵ7;v|_;u;r-buo=-7;=;1ঞ;r-u|ou
7;b1;ķ ou b= m;;7;7ķ - m; r-u| ou 7;b1;ķ 0| mo| bmv|-ѴѴ-ঞom ou ;1_-m]; 1ov|vĺ &m7;u mo 1bu1lv|-m1; bv |_; v;ѴѴ;u Ѵb-0Ѵ; =ou 7-l-];v
1olr;mv-ঞom=oubm7bu;1|7-l-];ĺ

0–10 V 4–20 mAƑőo1hbm]|_;7bvrѴ-Ĺmv|-ѴѴ|_;flr;u|oѴo1h|_;7bvrѴ-|oru;;m|-11;vv|o|_;1omC]u-ঞoml;m-[;ubmv|-ѴѴ-ঞombv1olrѴ;|;7Őv;;|_;v1_;l-ঞ1v=ou|_;
Ѵo1-ঞomo=|_;rbmvőĺCopyright HK Instruments 2017ĺ_hbmv|ul;m|vĺCmv|-ѴѴ-ঞom;uvbomƔĺƏƑƏƐƕ