DWYER INSTRUMENTS, INC. Phone: 219/879-8000
Contents
1. LI LHH ANY NI LHH SY3gNWNN SOWWLVS SNlWuVddV d3LYIJOSSY WA 9941 013195 TWNOILdO Xp 1 INIT OL dn NOILOANNOD ANNOY9 ordi LNAISINY 209 1 9 NO GaSV 3009 SHNLWYAdWAL 1 III 6512 5414 SdN0Y9 II SSY19 L A 9 9 SdNO D 1 101 5519 901 JAS AIVIISNI LNI NOILY907 93118519 SNOGYVZVH 9941 WAN SNOGYVZVH NON SI SIHL SUNIWHAd AL mu eee AOSV ONISNOH NOILOANNOO ANNOY eee HY 2 8 1 8 W109 931935 1 1 1 1 00 9 100 0 t com Ins FR 03 443603 00 Rev 4 info dwyer www dwyer inst com e mai 219 879 8000 219 872 9057 Phone Fax Printed in U S A 9 10 Copyright 2010 Dwyer Instruments Inc BOX 373 MICHIGAN CITY INDIANA 46361 U S A DWYER INSTRUMENTS INC2. is necessary to meet CE requirements or when used in electrically noisy environments HAZARDOUS SIDE NON HAZARDOUS SIDE 250 OHMS 4 20 mA ON LOOP NVERSION RESISTOR STOR SUPPLY IF SHIELDED CABLE IS USED FOR 4 20 mA LOOP GROUND THIS SIDE OF CABLE ONLY i SHOWN TRANSPARENT FIGURE 1 Entity Parameters Vmax 28 VDC Imax 100 mA Ci 62 nF Li 7 7 uH Pi 651 mW Wiring Diagram Humidity and Temperature Intrinsically Safe Installation Notes 1 Remove power from the instrument before carrying out any servicing 2 Return the instrument to the manufacturer for any repair Any unauthorized repairs may impair the intrinsic safety of the instrument 3 Use only FM approved Associated Apparatus When installing the Associated Apparatus the manufacturer s instructions must be followed 4 Install in accordance with ANSI ISA RP12 06 01 and the National Electric Code ANSI NFPA 70 5 The earth terminal on the housing must be wired to a local earth ground in the hazardous area 6 Refer to FM control drawing Dwyer number 03 001467 00 7 For Model HHT IT use ONLY Pepperl Fuchs KFD SCS Ex1 55 Galvanically Isolated Barriers HAZARDOUS SIDE MODEL HHT IT RH AND TEMP NOTE THE PEPPERL INTRINSICALLY SAFE WIRING FUCH KFDO SCS Ex1 55 4 20 mA EXAMPLE USING PEPPERL FUCHS BARRIERS ARE LOOP SUPPLY BARRIER SYSTE GALVANICALL
3. Bulletin A 20 HHT Series HHT Hazardous Area Humidity Temperature Transmitter Dwyer The Series HHT Hazardous Area Humidity Temperature Transmitter takes accurate measurements in the harshest of environments The transmitter is offered in explosion proof and intrinsically safe versions depending on the applications requirements The explosion proof model is offered with 4 to 20 mA outputs for humidity only The intrinsically safe version is offered with 4 to 20 mA output for humidity and temperature Both versions have an optional two line alphanumeric display to show the current humidity and temperature The Series HHT humidity temperature transmitter is excellent for offshore HVAC applications dust and grain applications DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Phone 219 879 8000 Fax 219 872 9057 Specifications Installation and Operating Instructions 4 9 32 108 74 13 23 32 _ ae 347 98 1 2 NPTX j 1113 51 1 2 NPT 1 2 NPT SPECIFICATIONS Relative Humidity Range 0 to 100 RH Temperature Range 40 to 140 F 40 to 60 C Accuracy 2 10 90 RH 0 9 F at 72 F 0 3 at 25 Hysteresis 1 Repeatability 0 1 typical Temperature Limits 40 to 140 F 40 to 60 C Storage Temperature 40 to 176 F 40 to 80 C Compensated Temperature 40 to 140 F 40 to 60 C Power Requirements For intrinsically s
4. Y NON HAZARDOUS SIDE SO GROUNDING IS NOT SHOWN TRANSPARENT FOR CLARITY REQUIRED mal H KFDO SCS Ex1 55 _ JRECEIVER EY TEMP RECEIVER MODEL HHT IT IF SHIELDED CABLE 15 USED GROUND THIS SIDE OF CABLE ONLY FIGURE 2 MODEL HHT IU RH ONLY INTRINSICALLY SAFE WIRING EXAMPLE USING MTL BARRIER LOOP SUPPLY HAZARDOUS SIDE NON HAZARDOUS SIDE gt SHOWN TRANSPARENT FOR CLARITY 64 RH 15 GROUND IF SHIELDED CABLE IS USED GROUND THIS SIDE OF CABLE ONLY MODEL HHT IU FIGURE 3 Power Supply Requirements The maximum DC Power Supply is 28 VDC The minimum required DC Power Supply required is based upon the following 1 Minimum DC voltage requirement of the Model HHT 2 Total load resistance 3 Total leadwire resistance 4 Zener barrier voltage drop Model HHT IX only The formula for calculating the DC Power Supply is VDC VHHT VLOAD VLEADWIRE VBARRIER Where VHHT 9 5v for Models HHT IX and 16 5v for Models HHT EX VLOAD Total load resistance X 20 VLEADWIRE Total leadwire resistance X 20 VBARRIER 8 1v Typical zener barrier voltage drop for this application Example 1 C
5. afe models HHT IX 9 5 to 28 VDC For explosion proof models HHT EX 16 5 to 28 VDC Output Signal 4 20 mA 2 channels for humidity temperature models loop power on RH Response Time 15 seconds Electrical Connections Screw terminal block Conduit Connection 1 2 female NPT Drift lt 1 RH year RH Sensor Capacitance polymer Temperature Sensor Solid state band gap Housing Material Aluminum Display Optional 2 line alpha numeric 8 characters line Temperature display is selectable Display Resolution RH 0 1 Temperature 0 1 F 0 1 Weight 2 Ib 8 oz 1134 g Enclosure Rating NEMA 4x IP66 Models HHT EX FM Explosion Proof Class Div 1 Group B C D Class II Div 1 Group F G Class 11 Div 1 Models HHT IX FM Intrinsically Safe Class Div 1 Group A B D Class 11 Div 1 Group F G Class III Div 1 T4 Agency Approvals FM CE www dwyer inst com e mail info dwyer inst com Wiring Diagram Humidity Only Explosion Proof Installation Notes 1 Install in accordance with any applicable national electric code 2 Plug unused conduit openings Plug must engage a minimum of 5 threads 3 Use conduit seal within 18 inches of conduit entry 4 Disconnect power before servicing 5 Control equipment voltage on hazardous side is 250 Vrms DC maximum 6 Do not substitute any components The intrinsic safety of the sensor may be compromised 7 Shielded cable for 4 20 mA loop
6. alculate minimum DC Power Supply for Model HHT EX Explosion Proof Step 1 VHHT Minimum voltage required by Model HHT EX 16 5 v Step 2 Calculate VLOAD Using the industry standard 250 OHM conversion resistor VLOAD 250 X 20mA 5v Step 3 Calculate VLEADWIRE For this example assume a leadwire resistance of 10 OHMS VLEADWIRE 10 X 20mA 0 2v Step 4 VDC VHHT VLOAD VLEADWIRE 16 5 5 0 2 21 2v Example 2 Calculate minimum DC Power Supply for Model HHT IU Intrinsically Safe Step 1 VHHT Minimum voltage required by Model HHT 9 5 Step 2 Calculate VLOAD Using the industry standard 250 OHM conversion resistor VLOAD 250 X 20mA 5v Step 3 Calculate VLEADWIRE For this example assume a leadwire resistance of 10 OHMS VLEADWIRE 10 X 20mA 0 2v Step 4 VBARRIER 8 1v Step 5 VDC VHHT VLOAD VLEADWIRE VBARRIER 9 5 5 0 2 8 1 22 8v For Model HHT IT follow instructions with Pepperl Fuchs KFD SCS Ex1 55 Barrier INSTALLATION Location Select a location where the ambient temperature is between 40 to 140 F 40 to 60 C Position The transmitter is not position sensitive Units with the optional display should be mounted for ease of viewing the display Caution Use electrostatic discharge precautions e g use of wrist straps during installation and wiring to prevent equipment damage Avoid locations where severe shock or vibration excessive moisture or co
7. es Contact customer service to receive a return goods authorization number before shipping 00 297 100 0 00 297 1100 80 09897 VNVIONI ALS NYOTHOIN SIONVHO ON SLNINNYULSNI YSAMG Ivo OHO HSINI4 LI LHH ANY NI LHH sv ONIMVYG TOYLNOD Wd Ag NMG 80 S2 8 aINVN iva of SITONY TIY 1 05 600 SNOISNAWIG TIY 310 SSJINN 540 1 15 ONIMVYC TOWLNOO NOISNAWIG WOILIYS 09 111 5519 II 5519 NI G4SN 39 LSAW TIYIS LINGNOD LHOIL LSNA 9 LNAdINDA SIHL 9NITIYLSNI NJHM 38 LSNW SNOILONYLSNI NOLLWTIVLSNI SAYNLOVINNVIN SNLYYYddY 031 19055 JHL S 5 WWAOUddY YOldd LNOHLIM SNOISIAZY ON 9 ZLdY YSI ISNY ANY 06 FTOILYY OZ VAIN 3009 TWOIHL0474 TWNOLLWN 1 HLIM 39NYQY099Y NI LSAW NOILYTIYLSNI OA YO SUA 060 JHON 3LY43N39 ISN LON LSNW SNLVYYddY 031 19055 JHL OL GSLOANNOO LNAWdINDA Z Id gt Od 910827 17 Z 07 YO 07 910829 19 09 10 09 5 YO 01 HO 25 XP 5 1 90A WALSAS Y SY NOILVNIGINOO NI GANINWX4 AT1Y914193dS LON SHALAWWYVd ALILNA HLIM S391430 JAVYS ATIVOISNID LNI GAA0ddd Ws OML 40 NOILOANNOOYSLNI IHL SMOTIY 1939 09 ALILNS ALSAVS JISNIYLNI JHL L ALAAVS 871
8. rrosive fumes are present Do not exceed ratings of this device Permanent damage not covered by the warranty may result Display The temperature indicated on the display if equipped with the LCD option is field selectable via a jumper located on the circuit board just above the display To change the jumper position remove the housing cover and position the jumper for F or C according to Figure 4 FIGURE 4 Replaceable RH Temperature sensor and sintered filter Replacement sensors are available No calibration is required when a new sensor is installed To replace the sensor remove the sintered filter When installing the new sensor make sure the 4 pin male connector is aligned correctly with the female connector See Figure 5 To order a replacement sensor or sintered filter contact Dwyer sales The part numbers are Replacement 2 sensor A 451 Replacement sintered filter A 450 m hes CORRECT ALIGNMENT INCORRECT ALIGNMENT OF SENSOR ASSEMBLY OF SENSOR ASSEMBLY FIGURE 5 MAINTENANCE Upon final installation of the Series HHT Hazardous Area Humidity Temperature Transmitter no routine maintenance is required periodic check of system calibration is recommended The Series HHT is not field serviceable and should be returned if repair is needed field repair should not be attempted and may void warranty Be sure to include a brief description of the problem plus any relevant application not
Download Pdf Manuals
Related Search