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1. Fs S x NN ud p TO INOD ONIMVIC 31ONV A 001 52088 001 29088 001 2088 001 9088 US Ot 14 00 022 sh 20 92088 520 59088 20 2088 970 9098 We zz 13 SZ 68508 O2 as ESSE pom 0S0 5 088 00 59088 0S0 rZ088 0S0 P9099 0S SEEN Gown so so zt AMYAG SSHONINI2uv SNOISNANIG OL 020 52088 0 0 59088 0 0 2088 0 0 9088 whl 6 14 0 ANVdIWWOO HOVH ava 3WVN SS3TND NS ANVdWOO HOVH WOM 130 0 1408 0 1401 0 HLONST TG NI UN REE None NIELS sonno ene Avene aya GSO AINSSI SI LI ONIM YO SIHL NO 03501090 NOUWWYO4NI JHL NI SLHOIN A VI3ldO3d SWIVID ANVdWOO HOVH 3OLION ES IO cdlavi 3313W O6 OL II n 0 7 60 262 0 262 Wig O L 4001 S 14051 LJ Zo rezr 80 2627 20 162 20 2627 we 91 405 HION31 DI 10 20 2627 10 2627 0 wg 21 492 XVW AWO daog o0 ans L101 0 1401 0 v ans dmovs ALIOOT3A 5 HLON31 edi xQ
2. 11 27 9 0 96 2 4 cm 12 30 5 cm 1 05 2 67 cm 13 33 0 cm 1 14 2 9 cm 14 35 6 cm 1 2 8 1 cm 15 38 1 cm 1 31 3 3 cm 16 40 6 cm 1 4 3 6 cm 17 43 2 cm 1 5 3 8 cm 18 45 7 cm 1 6 4 0 cm 19 48 3 cm 1 7 4 2 cm 20 50 8 cm 1 75 4 5 cm 21 53 3 cm 1 83 4 6 cm 22 55 9 cm 1 9 4 9 cm 23 58 4 cm 2 0 5 1 cm 24 61 0 cm 2 1 5 3 cm 36 91 4 cm 3 1 8 0 cm 48 1 2 m 4 2 10 6 cm 60 1 5 m 5 2 13 3 cm 72 1 8 m 6 3 16 0 cm 84 2 1 m 7 3 18 6 cm 96 2 4 m 8 4 21 3 cm 108 2 7 m 9 4 24 0 cm 6 1 1 1 Mounting the Ultrasonic Sensor Note To prevent mechanical vibration ensure that the supplied isolation washers are installed as shown in Figure 24 on page 46 Several brackets are available for mounting the sensor to a fixed location such as a wall or floor See Figure 24 on page 46 and Figure 25 on page 47 For mounting options see Section 8 on page 67 Each bracket utilizes the 1 9 cm in NPT connector on the sensor to secure the sensor to the bracket Always level the sensor using a level The maximum water level must be below the deadband to ensure accurate readings 45 Sensor Installation This surface must be level Figure 24 Permanent Bracket and Isolation Washers 1 Wall Rail Mount Bracket Cat 2974 3 Downlook Ultrasonic Sensor 2 Isolation Washers Ca
3. 73 Appendix Working with Primary Devices 75 Appendix B Channel Installation Options 81 Appendix C Batteries and Chargers 87 Appendix D SCADA Modbus System Guidelines 91 Section 1 Specifications Specifications are subject to change without notice Table 1 911 Flow Meter Specifications General Certification cCSAus Approved for Class 1 and Division 1 and Group C Dimensions 16 5 cm dia x 57 cm L 6 5 in x 22 5 in with 12 amp battery Weight 8 kg 17 5 Ib with 12 amp hour battery pack Enclosure Material PVC Enclosure Rating NEMA 6P IP67 Operating Temperature 18 to 60 C 0 to 140 F Storage Temperature 40 to 60 C 40 to 140 F Power Source 12 amp hour battery pack Battery Life at 10 C 50 F also affected by site conditions User Interface Optically Isolated Interface to IBM compatible PC Monitoring Intervals 1 2 3 5 6 10 12 15 20 30 and 60 minutes Program Memory Non volatile programmable flash can be updated via RS232 port Time Based Accuracy Unit Measurements 1 second per day L
4. 87 Cleaning the Flow Meters 58 Combined Sewer Overflow CSO Application 84 Continuity Channel 85 D Data Analysis Software 41 Data Retrieval 41 Desiccant Maintenance 57 Difficult Sites 13 Downlook Ultrasonic Sensor 43 Dry Channel aa 82 E Elbows Sharp turns and Y connections 13 Event lnp t u uec ne eere 36 F Flow Equations 41 Flow proportional sampling 37 Flow Pulse Output 36 FUSES dte e a ve E c a fe aes 58 In Pipe Ultrasonic Sensor 49 Installation Considerations 13 Installing the Battery Pack 30 Intrinsically Safe Equipment 8 Intrinsically Safe Installation Requirements 8 Intrinsically Safe Wiring Practices 9 Invisible Range sse 43 L Ladder Rungs eese eterne 43 Lead Acid Gel Cell
5. 87 M Maintenance 57 Memory Batteries 58 Multiple Source Monitoring at a Single Site 83 Optically Isolated Interface 41 O Ring Gasket aset ene 57 O rings Replacement 57 Outfalls d ee ets 13 P Precautionary Labels 7 Programming and Analysis 41 Protecting the Sensor 44 R RAM issues 58 RS232 Batteries i 59 65232 Interface 59 RS232 Interface Wiring 35 RS232 Serial Port eee 35 S Safety Precautions 4 7 Sampler Connector Pin Assignments 36 Sampler Interface Wiring 37 Sampler Receptacle 37 SCADA ModbusSG 91 eet ete ee eeu 10 57 Sensor Configurations 13 Sensor Installation 43 Sewer System Management Software 41 Site Selection oscinina
6. SINNI S ALIDOTIA 2 E IT Nd 3O4 Z YO s mim N a Em JE 3l Ter s 1301 N d I TV3 31NI QUASE dflOd5 D LSSv1O NOIIVOO1 NOILV2O1 d3ldISSv1O STOGIVZVH T GIMISSVID ShOGNVIVHNON 9 NI SI SNIGVA ANIG WAWINIW E L NI Z L SI 83313WVIq LINGNOD W WINIW NOILVTIVISNI WAGOW A 1 u 1V Wer 195 60 1 9 1 VSI ISNV 81 NOILO3S 61200 38020 91419313 NVIAYVNYI YOS 31Ol13 v OZ Wd4N ISNV 3009 1VvOIl31O313 TYNOILYN 3HL 3ONV 3OOOV NI 38 LSNW SNI IIAA SBADdddv NOUdIZOSIO Ad 8313W UnL SONVLONGNI 43I3W JUZ 3ONVIIOvdvO NOISIA33 aasn 38 AVW SINIYA LINVSSG ONIMOTIOS JHL NMONDIND 33V 318vO JHL dO S3313WV3l vd 1v OI31O313 JHL dl 9 8 Figure 5 Control Drawing 940 V2 20 Meter Installation REVISION REV DESCRIPTION APPROVED E REVISED PER R 3146 05 1 CONNECTION OF P N 4080 FLASH CONVERTER TO 940 FLOW METER MUST BE MADE IN A NON HAZARDOUS LOCATION NON HAZARDOUS CLASSIFIED LOCATION P N 4840 940 10 FT 10 FT FLOW METER 3 1m P N 4080 SE LU FLASH CONVERTER I MATERIAL UNLESS OTHERWISE SPECIFIED NAME DATE NOTICE HACH COMPANY CLAIMS PROPRIETARY RIGHTS IN THE INFORMATION DISCLOSED ON
7. The master queries the flow meter using a Read Holding Registers request which implies a 4XXXX register reference to slave device address 01 The message requests data from holding registers 40007 40008 to obtain the level information which requires two registers to store the floating point value Note that registers are referenced from zero in the data field 95 SCADA Modbus System Guidelines D 11 Response The 940 Flow Meter responds with the following transmission reflecting a level reading of 15 0 inches Table 19 Transmission Response that Reflects a 15 in Level Reading Start i Slave Address 01 Function 03 Byte Count 04 Data High 00 Data Low 00 Data High 41 Data Low 70 LRC 47 Stop lt CR gt lt LF gt The flow meter response echoes the address and function code which indicates that no problems exist the communication between the master and 940 The Byte Count field specifies how many 8 bit data items are being returned in the data field With Modbus ASCII this is one half the actual count of ASCII characters transmitted in the data portion of the response The contents of 40007 are shown as two byte values of 00 00 hex and the contents of register 40008 are shown as two byte values 41 70 hex Together these values represent the floating point IEEE representation of the level status D 12 940 Flow Meter Response Time As a result of time lags asso
8. 1V3 31NI Q 2 L AIG L SSV1O NOILV2OT NOILv2O d3lIsSv1O SNOGIVZYH 9 NI SI WAWINIW 935519 SNOQAVZYHNON LNI Z L SI 33I3WVIO LINONOD W WINIW LINGNOD NI NOILVTIVISNI W3GOW Jor 195 60 9 1 dad VSI ISNV 81 F6 L CO 3802 Ol31O313 NVIGVNVD YOS 31Ol13V OZ Vd34N ISNY 3009 1VOIl31O313 TVNOILVN 3HL 3ONV 3O2OV NI 38 LSNW 5 ONIIM Q3AO43ddV YILIW UNI SONVLONGNI 3313W JUZ JONYLOYdYO NOISIA32I qasn 38 AVW SINIYA ONIAOTIOd JHL NMONDNN JAY 318vO 3H1 dO SN3I3WV3IVd 1W91419313 JHL dl A y 5 9 7 8 Figure 10 Control Drawing 940 V9 25 Meter Installation l 4 v 130 193HS clI 31v2S 0LA0r6 8 TIYIS LON OG A L A38 ON 325 34 ONIONV2HTOL Olall3WO39 133 d4331NI IVA orc 076 001 52088 001
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10. NNSSNNNS CINSSI SI LI SIHL NO 93501254 NOILVW3OdNI SHL NI SLHOI AYVIIIdONd SWIVID ANVdWOO HOVH 3OILON 31971 60 4627 0 2647 wg 0E L3001 HLON31 90 2627 20 2617 20 LE2r 51 1409 LO PELY 20 62 10 2627 1062 wig L LASZ BWOISNO AWO aog 0 Ans L401 0 ans 1401 0 ans ALIOOTZA 1 9 3OV3831NI d31avl W3QOW Erby N d XVW 14 001 SO EE7S XVW 13001 1727 ddOdd ji OYIZ ZH3SZ z4 N a JDVAYALNI rl GaiviosFoido 80 608 N d NON 33 1dWVS gue wee N d 1301 13091 HION31XVW i TES voi o1 o T woz A0 YILIMMO 14999 OOCFSZS N d 99288 HISNSTXYW cub allo B ow 080 58 a XVW 14 OOI 14 SZ V3alv DL t Er T Na 4047 0 P uk Be 5 or Es 1 1401 8 Zv N d A18WiSSv REN T O dNOY9 I L SSv12 ANON NOILVOOI q3lISSv1O SNOGYVZVH SI SNIGVA WAWINIW 9315519 SnOq3vzZVHNON LNI Z L SI 3ISWVIO LINGNOD WAWINIW NI NOILVTIVISNI WICOW a Jer 195 60 9 C VSI ISNV 81 NOIIO3S F6 L CCO 3802 Ol31O313 NVIGVNVD YOS 41 OZ VdAN ISNY 3009 TVNOILVN 3HL
11. 020 29098 72088 00 0088 6 14 0 GANDI TVAO3ddV ANVdNOO HOVH uw SINN Waw T3060 14000 14060 1101 0 HION31 S n3 conde LE He WO AON3SV AFOLVINDII v ANS v ANS ANS v ANS NOISSIW3I3d 19381Q 3NOANV OL CISOTOSIA YO NO3N3H NMOHS LON XO N3HI3HM ONIHLANV OL CISA LAVA NI 3O 31OHA NI ION AWW KINO NOILVW3OJNI ONI333NION3 304 3ON3OHNOO NI NN GUVONVIS GHVONVLS 01551 SI LI ONIMYNG SIHL NO 03501090 NOLWWAOSNI NI SIHOI3 A3V13ldO3d SWIVIO ANVdWOO HOVH 3OIION z 318V1 22312 60 167 0 6 b o zezr US O L3001 HIONGT318VNIH3Q 33WOISnO 80 2627 2064 20 62 2 911309 i 4 70 2627 10 62 1062 wg JL 392 AWO _ amp ns L301 0 Av ans 1401 0 ans GUVONVIS HLONS1 1 BOVJM3INI dig vi W3GOW 3 rrr N d N d 3OV3331NI GA ar GQ31V1OSI O1dO XWW 13001 13 SZ 38084 INON S31dWVS ALIDOTIA V3av ue N d H Ez IE Nid 4047 1 318V1 433 A18W3SSV 713061 HLONI1 E 0001 W pi VWOIS OL OOLlvSCS N d 5 NO e313W 13999 oocrszs 0 6 I3dHOW 0 8 N d ___ ao 14 091 Sas e HLONST XVW 3OVJ HINI
12. N QP DS ON 3215 661 ISNV 1484 var 076 001 52088 001 59088 001 v 088 001 9088 ws 0e 14 001 TO INOD ONIMVAG ui STONY RSS 5 TEX 340 8088 s0 s9088 920 72088 920 79088 w6 2271492 052 xx 050 6 0 8 060 9088 050 72099 050 79098 uz 9 14 OS v 6 908 OD GNVT3AO1 as NON SNES SINS 0 0 SZ099 00 9088 020 72088 6 1408 0095 as S3HONINI33v SNOISNANIA pp NONO OL q ANVdIWOO HOVH ava 10341034S SS3INN N 1VAO ddY 14 0 0 44 14 0 0 13 01 0 HLON37 ANVdWOS HOVH WOX N avans avans avans Av ans NOISSIWdId 1 INOHIIM INOANY O1 YO NOIYIH NMOHS LON NO dIHLIHM ONIHLANV AONSOW AIOLV 38 5 3einLOVJNVW OL G3Sf 38 el Vd NI YO 31OHA ION AVW MINO NOINVWIOANI ONI333NION3 4014
13. AINO NOILVW2IOJNI ONI333NION3 404 3ON3OHNOO NI GANSSI SI Ll ONIMVAC SIHL NO 03501254 NOHVWAOANI IHL NI SIHOIY 1314094 SWIVTO ANVdWOD HOVH 3OILON WLS IIS NIK 77 SIHL N jp ONONVHO OL TORA 1938 TVAO3ddV ADNIOV AZOLVINDII X SS Z 84811 80 3 GAO ddV NOISIA33 W3GOW e TIdWVS OINOSValLIn ALIDOTHA V ALIDOTIA 06054 FIINCOW AYILLVA WAIHI I1IVIDIVHIIA 0058099 N d JO 310GOW A 3l3llva8 ATL WNIHIN 97 08 Ly N d 1VNOILdO 1VNOILdO 182 N d 900 N d 6818 N d X v ly N d NOILdO ZA zINnaOW 13431 DINOSVALIN LEES N d 100 N d NOIIdO lA ALDOTAA V33lv 6665 N d LO L2ZY 100 N d IINAOW ia ALIDOTIA V33lv FINGOW SEES N d 6665 N d 10 12 N d 87 N d 33I3W MOTI O76 0784 N d Figure 7 Control Drawing 940 V4 22 Meter Installation l z y 5 9 8 130 133HS 31V9S
14. FONVOYODIY NI 38 LSNW SHOHI3W ONIIM YILIW UNI FONVIONONI 3I3I3W JuZ 3ONVIIOVdVO NOISIA33l qasn 38 AVW SINIYA ONIMOTIOS JHL NMONXNN JAY 318 VO dO SNBI3WV3Vd TVOINIO3T3 JHL dI IL L 4 5 8 Figure 12 Control Drawing 940 V14 27 Meter Installation L 1 193HS 2 1 31VOS SLA Ov 9 25 LON OQ AN NM ON 325 WS PLAISNY Or DIALIWO39 133d331N 1 soe 105 XX 68508 OD GNV13A01 as 0099 row so so zi as SIHONI NI SNOISN3WIG ANVdWOO HOVH 3WvN ASI MI3HLO SSIINN ANVdWOO WOdI NOISSIW2Bd 19341Q INOHLIM 3NOANV OL CISOTOSIA YO NO33BH NMOHS LON YO 3I3HI3HM ONIHIANW FYINLOVINVW OL GISN 38 LAVA NI XO FIOHM LON AVW AINO NOILVW3IOJNI ONI333NION3 OT 3ON3OHNOO NI GANSSI SI L ONIMVAC SIHL NO 035010510 NOLLVWYOANI 3HL NI SIHOIY AalvI3ldOald SWIVTO ANVdWOO I 5 SW MOT 066 OL FA 29 5 aglaya 33M Od 33N327 SI LEES N d 107001 N d DGA 221 01001 33WO1sno 3OV
15. DIMENSIONS ARE IN INCHES DRAWN s DUKART 12 9 2005 ENGINEER S DUKART TOLERANCES Xx 03 XX 01 XXX 005 ANGLES 425 INTERPRET GEOMETRIC TOLERANCING PER ANSI Y14 5 1994 DO NOT SCALE DRAWING THIRD ANGLE PROJECTION eue HACH COMPANY 00 LINDBERGH DR LOVELAND CO 80539 TITLE DRAWING CONTROL 911 FLASH CONV SIZE NO REV 11 V2 SCALE 1 1 WEIGHT SHEET 1 OF 1 Figure 2 Control Drawing 911 V2 17 Meter Installation l s 1 130 19995 1 1 1895 ION OG Aaa ON azis 4 ONDNVETOL 30018 l l I313WO3S 138485 IN WVaOVIG 31111 035 xx 66908 OD GNVT3AO1 SINONI DEA FORTE CCI ona ses n HOVH aia 3WVN ISIMY3HLO SSTINN ANVdWOO HOVH WO8J NOISSIW33d 1 3NOANY OL G3SO1OSId NO Q39nQO3d33 NOIYIH NMOHS ION YO 33HISHM ONIHLANY 38n1OV43NVW OL CISA 38 I vd NI YO 31OHM NI ION AVW XINO NOILVW3NOJNI ONINIINIONI 304 NI AINSSI SI LI ONIM V3 SIHI NO G3SO1OSId NOILVW3OJNI JHL NI
16. Reference Indicator Reference Type Meaning Discrete Output or Coil Binary 1xxxx Discrete Input Binary 3xxxx Input Register Real 4 Output Holding Register Real 6xxxx Extended Memory Register Real The memory data is stored in 16 bit words Within the predefined function codes of the Modbus ASCII protocol the data fields are subject to interpretation by the device manufacturer For example the 940 Flow Meter places temperature information in registers 40001 40002 D 9 Modbus ASCII Function Codes Supported Currently the 940 Flow Meter is capable of a read only function to retrieve channel and total flow information All data addresses in the Modbus ASCII message are referenced to zero Therefore a reference to holding register 40001 is addressed as register 0000 The function code field specifies the type of register accessed therefore the 4XXXX is implicit Function 03 Read Holding Registers Reads the register 4X reference contents of the 940 Flow Meter as defined in the tables that follow Table 14 Channels Read Holding Register Addresses Name Type Size bits of Registers start n SUR oo Registers Temperature Float 32 2 00 00 40001 40002 Rainfall Float 32 2 00 02 40003 40004 pH or ORP Float 32 2 00 04 40005 40006 Level 1 Float 32 2 00 06 40007 40008 Velocity 1 Float 32 2 00 08 40009 40010 Channel 1 Float 32 2 00 0A 40011 40012 Channe
17. Material Stat Kon A E ABS Plastic Cable Length Dimensions 7 6 m 25 ft standard maximum custom length is 30 5 m 100 ft 4 44 cm 1 75 in maximum diameter 31 435 cm 12 375 in long Mounting Dedicated Mounting Rings Permanent Mounting Bracket installs directly to pipe wall Adjustable Mounting Band Kit Specifications Table 2 940 Flow Meter Specifications continued Downlook Ultrasonic Sensor Operating Frequency 75 kHz Beam Angle 5 15 24 cm or 3 048 m 0 003 0 01 ft at 22 C 72 F still air 40 70 relative humidity Accuracy from 6 10 ft Range 10 ft Operating Temperature 18 to 60 C 0 to 140 F Temperature Error 0 00005 m C 0 0001 ft F maximum error with compensated temperature range per degree of change Resolution 0 019 cm 0 0075 in Material ABS housing with ABS acoustical window Cable Length 7 62 to 30 48 m 25 to 100 ft Dimensions 15 24 cm x 5 7 in x 2 25 in 1 When the sensor is out of the water the system may report velocity readings of up to 0 76 m s due to radio frequency and interferences at frequencies of 140 170 MHz and 300 MHz with field strengths greater than 3 V m 2 For temperatures above 40 C 104 F add 0 3 cm C 0 03 in F Section2 General Information 2 1 Safety Information Read the entire manual before unpacking setting up
18. N d ATEMASSY ANIA INIT NI TIV3O3INI dnO39 1 1 SSvTIO Meter Installation a au NOLY901 laiiissv12 SNOGIVZYH een Terr STI d VSI ISNY 81 NOILO3S 76 1220 3009 NVIdVNVO OZ V dN ISNV 3009 IVIIILOITI SONVGYODOV NI 38 ISNW SQOHISW ONIZIM Z NOlLdIOSCI 8 SONVIONONI BI3W IUZ FONVIIOVAVO NOISIA33 CASA 38 AVW SINIYA ONIMOTIOS 33v 318VO JO SAJLIWYXYd IVIIBLOITI IHL 31 1 1 V Sg 9 8 Figure 1 Control Drawing 911 V1 16 Meter Installation REVISION REV DESCRIPTION APPROVED E REVISED PER R 3142 05 1 CONNECTION OF P N 4080 FLASH CONVERTER 911 FLOW METER MUST BE MADE IN A NON HAZARDOUS LOCATION P N 5150 911 FLOW METER NON HAZARDOUS CLASSIFIED LOCATION 10 FT 8 1m P N 4080 2r Li FLASH CONVERTER 10 FT NOTICE HACH COMPANY CLAIMS PROPRIETARY RIGHTS IN THE INFORMATION DISCLOSED ON THE DRAWING IT IS ISSUED IN CONFIDENCE FOR ENG INEERING INFORMATION ONLY AND MAY NOT IN WHOLE OR IN PART BE USED TO MANFACTURE ANYTHING WHETHER OR NOT SHOWN HEREON REPRODUCED OR DISCLOSED TO ANYONE WITHOUT DIRECT PERMISSION FROM HACH COMPANY MATERIAL UNLESS OTHERWISE SPECIFIED NAME DATE
19. Y Figure 22 Invisible Range 1 Maximum Range 3 Highest expected water level 2 Minimum Distance must be at least 11 in 29 cm 4 Invisible Range set to ignore tops of channel walls Beam Angle The beam angle from the bottom of the ultrasonic sensor spreads out at an angle of 5 for the 75 kHz sensor as it travels away from the sensor Therefore if the sensor is mounted too high above a narrow channel the beam may be wider than the channel when it reaches the bottom of the channel This can cause false echoes from the tops of the channel walls rather than from the water surface To prevent false echoes determine the appropriate sensor height so that the entire beam falls within the channel and does not strike any obstructions Beam Width Formulas The maximum beam width for a given distance from the sensor can be calculated as follows 0 087 x distance from sensor Refer to Figure 23 and Table 8 on page 45 ADI Lui 2 Figure 23 Beam Width as Distance from Transducer Increases 1 Distance from Transducer 2 Beam Width 44 Protecting the Sensor Keep the face of the sensor free of accumulating grease and dirt Since the 940 Flow Meter listens for the returning echo a coated sensor will not be able to accurately detect the echo and may provide inaccurate level measurement Sensor Installation Table 8 Beam Angle Spread by Distance Distance from Target in 75 KHz Beam Width in w Horn
20. 1 75 of reading from 0 to 30 C 32 to 86 F 0 25 full scale 2 1 of reading from 0 to 70 C 32 to 158 F Velocity Induced Depth Error Compensated based on pipe geometry and flow velocity Depth Range Standard 0 3 m 0 10 ft Extended 0 9 m 0 30 ft Air Intake Operating Temperature Atmospheric pressure reference is desiccant protected 0 to 70 C 32 to 158 F Depth Compensated Temperature 0 to 70 C 32 to 158 F Material Noryl plastic outer shell with epoxy potting within Power Consumption lt 1 2 W 12 VDC Cable Material Urethane sensor cable with air vent Cable Lengths Available Standard 9 15 23 and 30 5 m 30 50 75 and 100 ft Cable Diameter 0 91 0 36 Dimensions 2 3 cm H x 3 8 cm W x 13 5 cm L 0 9 in H x 1 5 W x 5 31 L In Pipe Ultrasonic Sensor Operating Frequency 75 kHz 0 027 ft for sensor to liquid distance between 2 5 inches and 5 ft at 1 ft change in head from Accuracy calibration point 20 C still air ideal target 25 ft cable Distance from sensor to liquid 0 2 inches minimum to 5 feet maximum 20 C still air Range ideal target 25 ft cable Resolution 0 019 cm 0 0075 in Operating Temperature Range 20 to 60 C 4 to 140 F Storage Temperature 20 to 60 C 4 to 140 F Temperature Error 0 00005 meter C typical
21. ZH 09 08 te t Z SIATE 107001 N d m W3GOW COLA T didi eur a ODi H S MOOSA Vauv LE N d 401 1 318V1 438 N d alalal va ATddNS 33AOd HISNSIXVW Ut A18W3SSV JOVIYIINI I 1N3A INN NI 0001 CALYIOSFOLIO VWOIS OL i TE 001FSZS N d En woz me 14959 O0 vScS N d X0 13081 X3 LIW MOI do HLONST XVW 040 ETS JOVANI UIS OE Wi9 Z 3 G3lv1OS OldO XVW14001 14 SZ 38088 w 260 54 ALIDOTIA OL Nes H z E N74 4047 NO n AE 807 Nid E 3 Us 1401 8 44 N d X18W3SSv ASE L AIGA L SSVII NOI1VOO1 d3IdISSV1O SNOGAYZVH 9 NI SI WAWINIW 9315155712 SNOGYVZVWHNON WO L NI Z L SI X3LIWYI1A LINGNOI W WINIW LINGNOOD NI NOILVTIVISNI WAGOW yer 195 60 5 I 9 1 VSI ISNV 81 NOILO3S 61200 38090 91419313 NVIOVNVO YOS FIOWYY OZ VdAN ISNY 3009 1v2I31O9313 TVNOILVN JHL FONVOYODIY NI 38 ISAW SGOHISW ONIMIM NOIIdIN2S3Q Ada ABLUW UN 3ONVIONONI 313W JU JSONVIIO Vd VO NOISIA33 38 AVW SINIYA LINVSSG ONIMOTIOS JHL NMONDIND 33V 318 2 JHL JO SYILIWWAVd IVOIBLIITI JHL dl l l y 5 g 8 Figure 11 Control Drawing 940 V10 26 Meter Installation 130 19995 4HOBM 31VOS D VvI Ov6 4 IYS LON OQ
22. 0 9 2 See _ HS SONA YALNdWOOD OL ID N d rra 4 N d 3O4 Z JO we es E tC e Lasi say 1401 8 Zy N d ATAWASSY 1 1N3A NI i ys NOIIVOO1 L AIG L SSV1O GIHISSVIS SnOGNVIVHNON CIIHSSVTO WO 9 NI SI SNIOYVY QN38 WAWINIW JOY yer 19 60 1 NOIILdlal2OS3Q A33 NOISIA33l L 921 d VSI ISNV 81 NOILO3S r L CO Ol31O313 NVIAYVNWI YOS 31Ol13V OZ WddN ISNV 9009 TvOIl231O313 TVNOILVN 3H1 3ONVYQ3OOOY NI 38 ISAW STOHIIW ONISIM a313W Un 8I313W JU C dONV1IOVdVO q3sSn 38 AVW SINIYA LINVSIG 9NIMOTIOd 3HL INMONINN JAY 318vO IHL dO SYILIWV AV 1vOl31O313 3HL dl IL 9 L 8 Figure 4 Control Drawing 940 V1 19 Meter Installation l z s 9 1 8 130 1 133HS HOM 2 1 305 TIYIS LON 1 AO DO ON OMG 325 IN ONIONV2HTOL DINOSVALIN Or N UIWOID 133 d4331NI S05 SONY 001
23. 12 15 20 30 and 60 minutes Program Memory Non volatile programmable flash can be updated via RS232 port Time Based Accuracy 1 second per day Unit Measurements Level in m cm ft Flow gps gpm Ips Ipm Iph mgd afd cfs cfd m3s m3m m3h m3d Totalized Flow gal ft3 acre ft L m3 Data Storage Capacity 306 days of 2 level readings and 2 velocity readings at a 15 minute recording interval Data Types Level and Velocity Storage Mode Wrap or Slate Output Conditions Set point on level velocity flow or flow rate of change Sampler Output 6 12 V dc pulse 100 mA max at 500 ms duration with approved interface Communications Connection Serial connection via optically isolated interface to IBM compatible computer with analysis software Local Terminal RS232 at 19 2 k baud Specifications Table 2 940 Flow Meter Specifications continued Submerged Area Velocity Sensor Velocity Measurement Method Doppler Ultrasound Twin 1 MHz piezoelectric crystals Typical Minimum Depth 2 cm 0 8 in Zero Stability 0 015 m s lt 0 05 ft s Accuracy 2 of reading Recommended Range 1 52 to 6 10 m s 5 to 20 ft s Depth Measurement Method Pressure transducer with stainless steel diaphragm Accuracy static 2 0 16 full scale 1 5 of reading at constant temp 2 5 C 0 20 full scale
24. 2 Optically Isolated Sampler Interface Cat No 4274 ina 4 940 Flow Meter in a hazardous location non hazardous location 4 6 1 Connecting the Sampler Cable to a 940 Flow Meter Note The sampler must be located in a non hazardous location 1 Connect the Optically Isolated Sampler Interface Cat No 4274 between the 940 sampler receptacle and the samplers auxiliary receptacle 2 Program the sampler for Special Output Sample Output 4 6 2 Connecting a Non Sigma Sampler to a 940 Flow Meter DANGER Do not attempt to connect any sampler to the 940 Flow Meter without the use of the Optically Isolated Sampler Interface Cat No 4274 Failure to do so may result in fire or explosion DANGER Le raccordement d un chantillonneur quelconque a un d bitm tre 940 sans utilisation de l interface d chantillonneur isolation optique No Cat 4274 annule la fois la garantie et l agr ment de s curit intrins que du d bitm tre et peut provoquer un incendie ou une explosion Reportez vous aux sch mas de contr le de l installation The Optically Isolated Sampler Interface can also be used with samplers produced by other manufacturers In many cases a non Sigma sampler may be connected to the Optically Isolated Sampler Interface without any modifications or alterations If a non Sigma sampler is not compatible with the connector on the end of the sampler interface cable it may be necessary to remove the existing cabl
25. 24 inches 9706400 27 inches 9706500 30 inches 9706600 33 inches 9706700 36 inches 9706800 42 inches 9706900 15 to 42 inches 3766 In Pipe Mounting Rings for 6 to 12 in Pipes 6 inches 4021 8 inches 4022 10 inches 4023 12 inches 4024 In Pipe Sensor Mounting Bands for 15 to 42 in Pipes 15 inches 9706100 18 inches 9706200 21 inches 9706300 24 inches 9706400 24 inches 9706500 30 inches 9706600 33 inches 9706700 36 inches 9706800 42 inches 9706900 15 to 42 inches 3766 8 4 Ultrasonic Sensor Mounting Hardware Description Part Number Permanent Wall Mount Bracket 2974 Adjustable for Floor or Wall 2904 Tripod w Mounting Bracket for Sensor 9538 Cable Straightener 2883 Cable Grip Requires 2883 3183 68 Replacement Parts and Accessories 8 5 Mounting Plate Hardware for Directly Mounting to Pipe Wall Sensor Type Part Number Submerged Pressure 4939 In Pipe 3875 69 Replacement Parts and Accessories 70 Section9 Contact Information Ordering information for the U S A By Mail Hach Company By Telephone By Fax 4539 Metropolitan Court 800 368 2723 301 874 8459 Frederick MD 21704 9452 U S A Ordering information by e mail hachflowsales hach com Information Required Hach account number if available Billing address Your name and phone number Shipping address Purchase order number Catalog number Brief description or model number e Quantity Orderi
26. 52088 001 59088 001 2088 001 9088 14001 TOSINOO ONIMYE ui poe 920 92088 90 9088 920 72088 920 79088 We zz 14 SZ v 6908 O9 ONVT3AO as BON Er SIHL 050 5 088 090 9088 00 1088 090 9088 1 14059 009S Gown SWsoi as NMVAG S3HONINI SNOISN3WIQ 00 088 0 0 59088 0 0 2088 0 0 19088 6 14 0 ANVdWOO HOVH 3WVN 1091034 SS3INN Waly lt 4NvdWooHovHwosaijs 911933 vAOBNddv 13 08 0 14010 14080 1401 0 HLON31 2 SE DIN PS NT GT MON d rv CE EE diui G3 SSI SI 1l ONIM Y SIHL NO 035010510 NOILVWHOZJNI SHI NI SIHOI3 A3 vI3IdOald SWIVIO ANYdWO2O HOVH 39lION SENONVIS GEINONNIS sb IO Coste OD clavi O vEZV 60 161 EO L627 60 62 06 1 300 H1ON31 318VNH3q YSWOLSND zo vely 80 2627 20 2627 20 262 UZ SL L40S LOVELY 20 2627 10 26 10 62 9 271 392 AWO _ L30 0 amp ns 301 0 Av ans L301 0 ans ELE ALIOO I3A QHVONVLS HION3I W3QOW Od 1 MIX 1 319 1 Nid ci Na a tie 39084 es i XVW 14001 1924 N d OVNI EWS reg esoo NON s ule t t N d I 1301 13051 HIONI1 ET 0001 x CCS VWOIS OL EL 001FSZS N d 2 woz 5 MO S313WMOT 14999 002755 N d ore TARN ge DATE wus Oe up
27. 59088 001 2088 001 9088 13 00L 00012 910 2088 520 59088 S20 2088 520 79088 __ 6 22 14 SZ 022 2791713 08 62508 O9 as INON SIHL 92054088 02052088 0S0 t 088 050 9088 aL NO 0096 es so promo 00 92088 00 99088 00 71088 00 79088 6 14 02 ANVdWO HOVH mn SS3INN nia N uno 13 080 1400 14080 14010 9 Avgns avans Avgns Av ans Nolssiwaad 19381Q LNOHLIM 3NOANV OL CISOTOSIA YO qQ3OnGO2d32 NO3N3H NMOHS LON XO N3HI3HM ONIHLANV JANIOVANWW OL CISA 38 NI YO 31OHM NI AYW XINO NOIIVW3O4NI ONI333NION3 3O4 NI Adone GEVONVLS 1 GI TI ANSSI SI LI ONIMV3O SIAL NO NOILVWAOJNI JHL NI AYVISIFONA SWIVIO ANVdWOO Z318vl 22317 60 2627 60 26 6 06 1 400 XIW MO130F6 OL I awnowo sr 0 80 2627 20 2627 ZO LELb We GL LH0S ee 3 14 051 20 2627 10 46 V 10 t AINO G3dog 0 v amp ns 1201 0 Av ans 1301 0 v ans ALIOO 13A 5 HLSN31 1522 lui d18vl DGA 19 N d Gi fit HION31 aava 318VNI33Q 33MOd 33WO1SnO 2 SI LEES N d
28. Check the connection between the flow meter and the sensor Make sure that the sensor is level The sensor must be level for proper return of the signal Try shielding the transducer from convection currents Repeat the temperature calibration procedure If the unit reads extreme high or low temperatures the sensor may have a bad temperature Try a different sensor on the same flow meter to rule out instrument problems and try a different flow meter with the same sensor to rule out sensor problems Convection Currents Check to see if convection components between the sensor target are present If these components are present install a shield around the sound beam to eliminate temperature variation due to convection currents The system is designed with averaging routines to help mitigate this problem Check for excessive foam and oil While the 940 Flow Meter is designed with an AGC Automatic Gain Control scheme to reduce these factors it is recommended that sites without these anomalies be selected Obstructions Use the invisible range to select targets beyond peripheral obstructions Care must be taken to set the range higher than the expected level Transducer Ringing False return echoes mask real echoes Try moving the transducer farther from the liquid Check under the transducer for obstructions This includes the front and sides of the transducer Check the face of the transdu
29. ONIMYAC TIYIS LON OG 1 so 8 DO ON OMG 325 e MIA NEVER 2288 ONIONV2HTOL Valin 076 Olal3WO39 133 ALI JONIN ONIAV4G SCIEN SS 3 00 G 088 00 G9088 00 088 001 P9098 uG O 14 001 O3INO2 9 HL NOIS3rO34 AAA m a 920 92098 920 99098 920 72088 920 79098 5 4 92 v 6 908 09 GNV13A01 as ses oa K ONIMVAG SIHL 050 5 088 050 59088 090 72088 050 9088 wz sir1J os HOWISGNTI 0092 Gown as SNOISN3WIQ jp ONONVHO S 00 92088 020 09098 020 72088 00 9088 Wri er14 0 ANVdINOO HOVH ava 3ANN 0314103dS ISIM2BHIO SSIINN GILINDIY TIVAONddY INVINOS HOVHWOMIE 13080 1401 0 14060 14000 HLON31 EG PR n l EN o s as as ew q3 SSI SI LI ONIMVAM NO CISOTOSIA NOIIYW3O NI NI SLHOR AZIVISIFONd SNIVIO ANVdWOO HOVH 3OllON SNA 5 EBVONVIS GHVONVIS SS D 10 27317 60 2627 60 26 6062 WG 0 L3001 80 2627 0 6 gt Z0 2E24 Wz SL LJOS 20 2617 LO 6Lb 1062 21492 AINO 040 0 905 1401 0 875 1401 0 ans ALIOO 13A 5 HLON31 31gV1 4 uoc ddOdd XVW 14001 HIONA 33wOlSnO HE 2 zH3SZ 1929 Nid W3QOW O s Ets rrr N d 04 Eltt N d 13051 HION31XVW 1 m Y 0001 ZEZ SA wwsisor 001FSZS N d ID w
30. RAM memory Storm water sampling trigger option 940 only Flow proportional output option 940 only For details on programming the 911 or 940 Flow Meter refer to the software manual 41 Software and Communications 42 Section 6 Sensor Installation DANGER Only qualified personnel should conduct the tasks described in this section of the manual DANGER Seul un technicien qualifi peut effectuer les t ches d installation d crites dans cette section du manuel DANGER All connections to the flow meter must be made in a non hazardous location DANGER Tous les raccordements au d bitm tre doivent tre effectu s dans un environnement qui ne pr sente aucun danger 6 1 Downlook Ultrasonic Sensor The downlook ultrasonic sensor is mounted over the flow stream at the proper location for level measurement for the primary device See Appendix A on page 75 for more information The transducer emits a pulse of sound at a high frequency and awaits for the echo to return from the surface of the water The time it takes for this echo to return is relative to the distance between the transducer and the surface water As the level in the flow stream increases the time it takes for the echo to return to the transducer decreases distance is shorter By continuously transmitting these pulses and timing the returning echoes the sensor measures the level of the liquid on the flow stream After measuring the level the microprocesso
31. THE DIMENSIONS ARE IN INCHES DRAWN S DUKART 12 9 2005 HACH COMPANY DRAWING IT IS ISSUED IN CONFIDENCE FOR ENG TOLERANCES INEERING INFORMATION ONLY AND MAY NOT IN x 03 ENGINEER S DUKART 5600 LINDBERGH DR WHOLE OR IN PART BE USED TO MANFACTURE XX 01 LOVELAND 80539 ANYTHING WHETHER OR NOT SHOWN HEREON XXX 005 THIRD ANGLE PROJECTION REPRODUCED OR DISCLOSED TO ANYONE WITHOUT DIRECT PERMISSION FROM HACH COMPANY ANGLES 425 TTD RAWING CONTROL 940 V3 SCALE 1 1 SHEET 1 OF 1 INTERPRET GEOMETRIC d 940 FLASH CONV TOLERANCING PER ANSI Y14 5 1994 e SIZE NO REV A E DO NOT SCALE DRAWING Figure 6 Control Drawing 940 V3 21 Meter Installation 130 1 193HS HO IAM 1 A O L 11V9S g d WY ON 375 ADOT 046 Wvalovia 6 508 OD GNV1SA01 0098 AI ANVdWOO HOVH JILL NOILOJ ONd 31ONV tavana 333NION3 9002 21 ava 3WVN ONIMYAA 2 ION OA PEGLWSFLA ISNY ONIONWAFTOL DIVLIWOZO I33d381NI SJONVIITOL S3HONI NI SNOISN3WICI G3HIO3dS ISIMIFHIO SSIINN ANVdWOO WOSI NOIssiwaad 19481Q IQOHIIA 3NOANV OL Q3SO1OSIqQ YO 4 NO333H NMOHS LON YO 23HI3HM 33n1OV3iNVW OL 935 38 13vd NI YO TIOHM NI LON AVW
32. Temperature colder temperatures decrease battery life Site hydraulics second order effect caused by excessive turbulence Interval between downloads Meter Installation Table 5 provides typical expected battery life for 911 and 940 Flow Meters Table 5 Battery Life Model Battery Type Battery Life in Days 911 12 Amp hour gel cell Cat No 5160 01 90 940 Rechargeable lithium battery Cat No 6608500 Typically 330 Batteries for the 911 and 940 flow meters should last as listed above under the following conditions e 15 minute logging intervals e 1 level channel and 1 velocity channel logged Data downloaded once per week e 10 50 F ambient temperature e Also affected by site conditions 4 3 5 Recharging the Lithium lon Battery Pack for Model 940 DANGER Use only exact replacement battery packs purchased directly from the factory or a factory authorized outlet Any unauthorized battery substitution will void the intrinsically safe design and approval of the unit and could result in fire or explosion DANGER Utilisez exclusivement des batteries de rechange identiques que vous achetez directement aupr s de l usine ou d un point de vente agr par celle ci Tout remplacement non autoris d une batterie annule la conception s curit intrins que et l agr ation de l appareil et peut provoquer un incendie ou une explosion DANGER Never install remove or charge batteries in
33. a hazardous location DANGER Vous ne devez jamais installer retirer ou recharger les batteries dans un environnement dangereux To recharge the 940 Lithium lon Battery Pack 6608500 1 Move the 940 Flow Meter to a non hazardous location 2 Remove the battery pack from the 940 Flow Meter as described in section 4 3 1 on page 30 3 Inspectthe battery pack and the battery connection for any damage Do not attempt to use or repair a damaged battery pack assembly Make sure that the charging voltage switch on the back of the charger is set to 16 4 V Plug the charger 6678000 into a standard 120 VAC wall outlet The green power LED will illuminate 6 Connect the charger to the battery pack using the battery charger and battery pack cables The yellow charge LED indicator will illuminate See Table 6 for the Lithium lon battery charging status A completely discharged battery pack will charge in approximately 8 to 12 hours 33 Meter Installation Table 6 Battery pack charging status Charge LED Indicator Battery Condition Flashing Deeply discharged or needs replacement Illuminated Charging Off Charged 1 If the charge indicator LED does not stop flashing within 1 hour the battery pack is shorted and should be disposed of properly 7 Install the battery pack in the 940 Flow Meter as described in section 4 3 1 on page 30 4 3 6 Recharging the Battery Pack for Model 911 34 DANGER Use only e
34. for all fields are hexadecimal 0 9 and A F When a message is transmitted over a Modbus ASCII communication link each character or byte is sent in the order of Least Significant Bit to Most Significant Bit A typical message frame looks like the following START ADDRESS FUNCTION DATA LRC END HEX HEX HEX HEX HEX 1 Char 2 Chars 2 Chars n Chars 2 Chars 2 Chars CRLF D 3 Address Field The address field of an ASCII message frame ranging from 0 to 247 decimals consists of two characters that represent the slave address Individual slaves are assigned values between 1 and 247 A master addresses a slave by putting the slave s address in the address field of the message frame When the slave sends its response it places its own address in the address field of the message frame to let the master know which slave is responding 91 SCADA Modbus System Guidelines D 4 Function Field D 5 Data Field D 6 LRC Field The function code field of an ASCII message frame ranging from 1 to 255 decimals consists of two characters that represent the type of action the master is requesting from the slave Of these functions the 940 Flow Meter currently supports function 3 Read Holding Registers When a message is sent from the master to a slave device the function field tells the slave what kind of action to perform For example this may include reading the channel values of Level and Velocity Whe
35. gases when properly installed in a Class 1 Division 1 Group C or Group D Hazardous Location It does not mean that these flow meters are Explosion Proof If proper safety precautions are not followed or if the equipment is not installed properly there is a serious potential for explosion Be sure to review all safety precautions installation and wiring practices throughout this manual prior to installing a 911 or 940 Flow Meter 2 1 4 1 Intrinsically Safe Installation Requirements e Itis important that the installer of an Intrinsically Safe system reference the requirements of the authority having jurisdiction at the installation site In the United States reference should be made to Article 504 of the National Electric Code and ANSI ISA RP 12 6 The 911 and 940 Flow Meters should be installed in accordance to these requirements and in accordance with the approved control drawings in the manual Refer to section 4 1 on page 15 e Wherever possible associated apparatus should be mounted in a non hazardous location closest to the hazardous location This minimizes the length of the intrinsically safe conductors within the non hazardous location thereby decreasing the possibility of inadvertent connection to non intrinsically safe energy to the protected circuit It is recommended that the associated apparatus be mounted and installed in dust and moisture free enclosures Dust and moisture are conductive materials and may compromise the re
36. materials in the probes are kept fresh blue at all times 7 5 Cleaning the Connectors Coat connectors with lithium or di electric grease to prevent corrosion 7 6 Maintaining the Electronics Compartment 7 6 1 Fuses All internal fuses are self resetting and require no maintenance There are no other user serviceable components inside the electronics compartment 7 6 2 Memory Batteries An internal battery is provided to power RAM memory as well as the real time clock and associated circuitry The memory battery keeps the programmed settings as well as the logged data whenever the main power fails or is removed during transport storage or replacement The internal memory battery is located in the electronic compartment and is not user replaceable The internal memory battery has a life expectancy in excess of five years with the main battery installed If the main battery is removed for an extended period of time the life of the internal memory battery will be substantially shorter The user can see a low memory battery indicator using the appropriate application software See the software manual for details 58 Maintenance 7 7 Replacing the Batteries in the RS232 Interface DANGER Never replace batteries in a hazardous location DANGER Ne jamais remplacer les piles dans une zone dangereuse The Opto Isolated RS232 interface uses a quantity of industrial quality Alkaline C cells Under normal circumstances the batte
37. that emanates from the bottom of the in pipe ultrasonic sensor spreads out at an angle of 12 10 dB as it travels away from the sensor This means that if the sensor is mounted too high above a narrow channel the beam may be too wide when it reaches the bottom of the channel This may cause false echoes from the sides on the channel walls 6 2 3 Calibrating the In Pipe Ultrasonic Sensor Calibrate the in pipe sensor each time the sensor is installed at a new site Calibrate the in pipe via one of two methods Liquid Depth or Sensor Height Each method has its own advantages and disadvantages Liquid Depth calibration is the recommended calibration method use the sensor height method only when Liquid Depth calibration is not an option An Invisible Range can also be set which allows the transducer to ignore reflections from obstructions between the sensor and the water surface such as ladder rungs channel side walls etc 6 2 3 1 Calibrating the Temperature 50 The speed of sound in air varies with the temperature of air The in pipe sensor is equipped with temperature compensation to help eliminate the effect of temperature variation under normal site conditions Enter ambient air temperature at the transducer location For optimum results allow enough time 100 minutes to ensure that the sensor is at equilibrium with the surrounding air temperature Sensor Installation 6 2 3 2 Calibrating the Liquid Depth Liquid depth c
38. that follow as general guides for proper head measurement location in commonly used primary devices Refer to Figure 41 on page 77 for Parshall Flume Figure 42 on page 78 for Palmer Bowlus Flume with Integral Approach Figure 43 on page 79 for Leopold Lagco Flume Figure 44 on page 80 for H Flume and Figure 45 on page 80 for Round Pipes Contact the primary device manufacturer for more details 75 Working with Primary Devices Submerged Head Draw down Probe Maximum Measurement Head Height Point a Crest FLOW gt BE 2H Minimum Crest Height 4H Weir Plate Submerged Minimum Distance from Probe Weir Plate Figure 40 Weir 76 Working with Primary Devices Stilling Well tional Optional A Length of Converging Section 2 3A Length to Stilling Well Submerged Probe TOP VIEW Head Measurement Point Submerged Probe 1 Inm l IL I E l I T 5 H ELEVATION Submerged Flow mol zc Free Flow Figure 41 Parshall Flume 7T Worki
39. the canister to prevent liquid from entering the vent tube For best performance and to avoid grease buildup on the filter during surcharge conditions hang the canister vertically so that the end facing the sensor points downward 1 Disconnect the tubing from the top of the desiccant canister 2 Unscrew the hex head tubing nipple from the top of the canister and discard the old filter 3 Discard any remnants of Teflon tape from the nipple s threads Reapply two turns of Teflon tape Cat No 10851 45 to the threads pulling the tape into the threads until it conforms to the shape of the threads 4 Place a new filter over the hole Make sure that the smooth side of the filter faces the inside of the canister 5 Place the threaded nipple on top of the filter 6 With a slight pressure press the filter into the hole with the nipple threads and begin threading the nipple into the hole The filter deflects upward and feed completely into the thread until it disappears The filter must rotate with the nipple as it is threaded into the cap If it does not it is torn Start over with a new filter 7 Inspectthe installation A small dim light spot should be visible in the upper cap when held up to the light A bright spot indicates a torn filter Start over with a new filter Figure 39 Replacing the Hydrophobic Filter 1 Filter smooth side down 2 Hex head tubing nipple 3 Finished assemb
40. to you This warranty gives you specific rights and you may also have other rights that vary from state to state This warranty constitutes the final complete and exclusive statement of warranty terms and no person is authorized to make any other warranties or representations on behalf of Hach Company Limitation of Remedies The remedies of repair replacement or refund of purchase price as stated above are the exclusive remedies for the breach of this warranty On the basis of strict liability or under any other legal theory in no event shall Hach Company be liable for any incidental or consequential damages of any kind for breach of warranty or negligence 73 74 Appendix A Working with Primary Devices A 1 Working with Primary Devices and Sensor Operation Installing the sensor in any primary device requires familiarity with the proper location for head measurement in that particular primary device Just as the proper installation of the primary device itself is critical to obtaining optimum flow measurement accuracy the appropriate location of the submerged or ultrasonic sensor also greatly affects flow measurement accuracy Always consult the manufacturer of the primary device whenever possible for details concerning the proper location of the sensor A 2 Setting an Offset For Use in a Weir When installing a submerged sensor behind a weir the user may need to offset the actual reading from the submerged sensor to c
41. via Pin F 36 Meter Installation BLUE ORANGE WHITE zYELLOW BLACK gt Z GREEN YELLOW S O BLACK GREEN I BROWN RED F DO NOT TIN WIRES PRIOR TO TERMINATION Figure 20 Sampler Interface Wiring 4 6 Sampler Receptacle 940 Only DANGER Do not attempt to connect any sampler to the 940 Flow Meter without the use of the Optically Isolated Sampler Interface Cat No 4274 Failure to do so may result in fire or explosion DANGER Le raccordement d un chantillonneur quelconque un d bitm tre 940 sans utilisation de l interface d chantillonneur isolation optique No Cat 4274 annule la fois la garantie et l agr ment de s curit intrins que du d bitm tre et peut provoquer un incendie ou une explosion Reportez vous aux sch mas de contr le de l installation The optional sampler port lets the user to connect a 940 flow meter to a Sigma wastewater sampler Figure 21 The option provides several features e Flow proportional sampling Storm water trigger based on level useful for EPA NPDES permitting program 37 Meter Installation e Sample history logging Figure 21 Sampler Communications 1 Use approved seal to minimize passage of gases or 3 Sampler located in a non hazardous location vapors from hazardous location to non hazardous location
42. 318V1 7 19 N d Z Gi FE fit HION31 aava 318VNI33Q 33MOd 33WO1SnO 33N32 SI LEES N d ZH 09 05 2 OVA 001 I x H JOYNI Da 7 di MESS wg og W9 ISES N d 38O3d bd XVWH00 HSt LUOOTIA N d 3O4 Z 33081 i 1 318V1 438 YOOL N d ATddNS YIMOd HIONSTXVW gt AT8W3SSV gt 3OVJ8lalNI INJA NI 000 SOC 1V3 31NI z VW IS OL i LS 001FSZS N d En woz me AO 14959 002725 N d NO 14061 3313W MOI HLONST XVW 076 I3HOW JOVANI 2625 Nid WS OE WIP Z 34084 GQ31V OSI O1dO XVW14001 14 SZ 060 54 ALIDOTIA or IDO sona Ba THE N74 4047 wre cO Pest pe 1 1401 8 44 N d X18W3SSv NI NOILV2O1 Joyoly yer 195 60 r G3AOddY NOIldl3OS3q Ada NOISIA3 SSV1D SNOGYVZVHNON 1 1 SSV1O NOI1VOO1 G3HISSv12 ShOQSVZVH WO L NI Z L SI S3I3WVIQ WO 97 NI SI SNIGVA WAWINIW NANOS WNWINIW NI NOILVTIVISNI WAGOW 304 921 d VSI ISNY 81 NOILO3S r6 L CO 3qOO NVIOVNYO OS 31Ol13v OZ Vd3N ISNY 9009 1W91419313 TVNOILVN JHL FONVOAYODIY NI 38 ISAW SHOHI3W ONISIM FONVIONONI 2 2 CISN 38 AVW SINIYA LINVIAG ONIMOTIOS JHL NMONDIND JAY 318VO FHL dO SYILIWVAWd 1vOl31O313 JHL d
43. 3331NI daviostoldo 0001 sio i E 0019325 12999 00279 25 N d qAs ao 3OV3231NI 3 CILVIOSIOLdO TET SA yaindwoo o De SONIA wre gt 0 Hol 8 N d AS NOILV2O1 Gaidissv19 ShOQ3VZVHNON Jeuouv ger 195 60 d G3AO23ddV NOISIA33l l 4 14 051 HLONI1 XVW 14 091 w sr 714 OSL HLON31 N 001 652088 oor s osg 001 2088 001 79088 ws ocrid oor v ONIMVIO SIHL 5 0 5 088 910 9088 920 72088 920 79088 we 2 14 SZ ONIONVHD OL NON d 050 6088 050 9088 090 72089 080 79098 _Wz 61 14 09 lt 020 92088 00 9088 0 0 2088 0 0 9088 6 14 0 CIZINDIN IVAONddY AON3SV ANOIVINDIL 14080 13000 13060 11010 HION31 avans avans avans Av ans S 5 GHVONVLS aama 10 cdlavi m SO VEZV 6072627 8072617 WS O L3001 20 62 80 2627 20 2617 2026 Uz SL LJOS 0 2022629 10 461 1062 271492 ANo 130 0 ans L301 0 Av ans 1301 0 AV ans ALIOOTZA 5 8 WEOE W9 Z 390 d AL
44. D Catalog Number 4979 911 940 Intrinsically Safe Flow Meters USER MANUAL January 2010 Edition 12 HACH LANGE Company 2007 2010 All rights reserved Printed in the U S A Table of Contents Section 1 Specifications pede beo a Section 2 General Information ne toe ae dee erede tym 7 2 1 Safety IMPORTATION uu u 7 2 1 1 Use of Hazard Information iaia 7 2 1 2 Precautionary Labels ua 7 2 1 3 Hazardous Locations alia 8 2 1 4 Intrinsically Safe Equipment 8 2 9 Confined Space Su T EM 10 Section 3 Getting Started Bc erg 13 3 1 Installing the Flow Meter Considerations issus 13 3 1 1 Choosing the Proper Site nee a errata 13 3 1 2 Dealing With Difficult n anre 13 3 1 3 Choosing the Appropriate Meter and Sensor Combination 13 Section 4 Meter Installation i 15 4 1 Approved 911 and 940 Installation Drawings rennan nanenane nnne 15 4 3 Installing Batteries o e c P 30 4 3 1 Installing the Battery Pack in the 940 iaia 30 4 3 2 Installing the Battery Pack in t
45. G Schneider Automation Modicon ladder logic block library user guide North Andover MA AEG Schneider Automation Inc 1996 D 16 Troubleshooting Tips 98 Problem 940 Flow Meter responds to some Modbus messages but not all Response Check the Register Addresses The flow meter only responds to valid Modbus message requests If a Modbus message sent to the flow meter asks for stored register addresses for values that are outside of the address range currently supported by the meter the meter ignores the request The flow meter currently only supports register addresses 40001 through 40083 Consequently a request to read the value in any register address greater then 40083 will be ignored If a range of registers is requested and that range includes register addresses greater then 40083 the entire request will be ignored Response Check the number of registers being polled Additionally the 940 Flow Meter checks all Modbus messages to see if the correct number of registers is requested for the type of data being returned The meter ignores the request if the number of registers requested does not coincide with the correct number of registers needed to accurately display the data For example Velocity is a floating point value stored in register 40009 40010 Because all floating point values require two registers the meter would ignore a request to read just the data in register 40009 yet it would respond correctly to a request to read th
46. I application to poll a 940 Flow Meter it is absolutely essential that the correct data format is selected for that particular data channel register For example when polling for Flow Level or Velocity which are all floating point values the Modbus server or MMI must be configured to read these values as floating point values If the server or MMI is formatting this data as a data type other than floating point the values will not be read or displayed correctly 99 SCADA Modbus System Guidelines 100 Likewise if polling the meter for engineering units which are represented by integer values such as Flow Units of Measure or Level Units of Measure the Modbus server or MMI must be configured to read these values as Integers If the server or MMI is formatting this data as any data type other than Integer the values will not be read or displayed correctly Different Modbus servers and MMI manufacturers have different methods for configuring the application to the appropriate data type contained within the register Contact the server or MMI manufacturer for details on how to configure the application to read the data in the correct format B Batteries and Chargers 87 Battery Compartment Desiccant 32 57 Battery Disposal ii 87 Battery Internal Memory 58 Battery Le bia 32 Battery Storage
47. IDOTSA V33lv H DEE DE N74 9047 NO For ANIA NI e313W 076 IqdHOW TESS N d WS O W9 a u XVWHO0 HSC ALIDOTSA Waa N d 4017 NO Pil Brevi gs A18W3SSV INA INN NI L 55710 dq3l4ISSv1O SnOq3VZvH q 9 1 d VSI ISNY 81 NOILO3S 96 L TTI 3009 DI LOITI NYIAYNYO FIONA OZ Wd4dN ISNV 3009 1VOIl31O313 TVNOILVN 3HL FONVOYODIY NI ISAW STOHLIW ONI IM AaLAW UN 1 FONVIONONI 2I3W JU 3ONVIIOVdVO q3Sn 38 AVW SANIVA LINVAIA 9NIMOTIOd SHL NMONDIND 318vO 3HL dO SAILIWV AV d IVOIBOITI IHL AI 8 Figure 13 Control Drawing 940 V15 28 Meter Installation 4 2 Mounting the flow meter When mounting the flow meter remember to Mount meter so that the connectors face down The end of the meter that contains the batteries should face up If the connectors face up they may corrode and allow water to seep into the instrument Refer to Figure 14 on page 29 e When not in use cover the connectors with their protective caps to prevent corrosion Use the appropriate manhole support bracket spanner bar See Replacement Parts and Accessories on page 67 Figure 14 Installation options 1 Instrument Support Bracket Cat No 5713000 4 911 flow meter 2 Manhole cover 5 Wall L
48. SIHORI I3ldOd SNIVTO ANVdWOO HOVH 32ION 1139 139 ITIVOIVHOII 87 06 17 N d 619 D 5 9 r N d ONIMVAC SIHL i ONIONVHO OL FORI GAYINDII 1VAO3ddV ALOOTIA 7q MIOOTA 10 N d BEES N d 10 1 N d FINGOW SEES N d 06054 87 N d 33I3N MOM 116 0515 N d SO v L did G3SIA33 A33 NOISIA33 L y i s n Figure 3 Control Drawing 911 V3 18 Meter Installation I NI Z L SI S3I3WVIG LINGNOS WAWINIW NI NOILVTIVISNI W3dOW L 5 9 1 130 1 133HS 4HOBM 21 31VOS OG 5 ON IN ONIONV2HTOL DI LIWOI9 1334331N raw NN 2 AV ONG 076 2 00 G 088 00 G9088 001 088 001 9088 14 001 TORINO ONIMVAG ie o ONIMVAG SIHL 510 5 088 920 09098 S20 2088 S20 19088 we zzr Ld sz de IGNARI E 050 92088 050 59088 050 72088 090 9088 _wz 91 14 0S d 0098 Gown Sales so a Aa owa
49. Small Diameter Pipes Down to Street or Building Collectors 81 Channel Installation Options The 940 and the 911 Flow Meters do not require profiling to establish average velocity allowing setup in a dry channel Figure 47 Rapid signal processing and temperature compensation accurately record the change from dry to wet conditions Figure 47 Installation Setup in a Dry Channel 82 Channel Installation Options Figure 48 shows a storm vault accepting flow from two locations The 940 Flow Meter monitors level velocity and flow in both pipes and sends data via modem to a central location Figure 48 Installation for Multiple Source Monitoring at a Single Site 83 Channel Installation Options When a Combined Sewer Overflow CSO is conducive to accurate flow measurement the 940 Flow Meter can measure depth and velocity in the primary channel and measure discharge in the overflow channel See Figure 49 In some instances the overflow in some CSO applications may be too turbulent for accurate measurement Figure 49 Installation for Combined Sewer Overflow CSO Applications 84 Channel Installation Options Custody transfer or interagency billing demand redundant measurement for chain of custody In Figure 50 the 940 Flow Meter provides ultrasonic measurement of flow in a Parshall flume while also measuring flow upstream using the Continuity Equation Q AV This ensures no loss of data in a submerg
50. adder Mount Suspension Bracket Cat No 4874 and Cat No 4839 3 Suspension harness Cat No 4920 6 940 flow meter 29 Meter Installation 4 3 Installing the Batteries Never short circuit puncture deform or incinerate any of the battery packs used in the 911 or 940 flow meters Proper precautions must be observed in the handling shipping and disposal of battery packs 4 3 1 Installing the Battery Pack in the 940 DANGER Never install remove or charge batteries in a hazardous location DANGER Vous ne devez jamais installer retirer ou recharger les batteries dans un environnement dangereux The steps mentioned below give the installation procedure of the battery pack in the 940 1 2 3 9 Loosen the 5 16 socket head cap screw in the center of the bottom end cap Lift the end cap off Remove the two thumbscrews securing the battery retaining plate and unlatch the two rubber hold down straps Place the battery pack Cat No 6608500 inside the battery compartment Figure 15 Place the two rubber hold down straps across the battery to secure the battery in place Attach the battery power connector to the flow meter power connector Both connectors are physically polarized Try to pull the two connectors apart gently after placing the two connectors together to ensure that they are latched together Do not use excessive force or permanent damage to the connectors may occur Reattach the
51. alibration requires knowing the level or the depth of the liquid in the channel that is contributing to the flow Liquid depth calibration is the recommended calibration method for the in pipe sensor Take a physical measurement of the liquid depth and enter the value into the application software For a dry channel enter 0 depth 6 2 3 3 Calibrating the Sensor Height Sensor height calibration is generally used when access to the primary device is difficult such as confined space entry in a manhole or when there is no liquid flow during installation of the flow meter This calibration method requires knowing the distance between the zero flow point and the bottom of the sensor In a round pipe the zero flow point is typically the invert or bottom of the pipe Further compensation is required for the invisible range internal deadband in the sensor housing Measurement uncertainty increases to 1 28 cm 0 042 ft for a 30 cm 1 ft change in level from the calibration point Use this method ONLY if the Liquid Depth is not an option Measure the distance from the bottom of the sensor to the zero flow point Add 18 3 cm 7 2 in to the measured distance to obtain the total zero flow distance Enter the total zero flow distance value into the application software 6 2 3 4 Invisible Range Deadband Note When programming the invisible range 18 3 cm 7 2 in must be added to the desired range to compensate for the internal deadband distance betwee
52. anty will be warranted only for the remainder of the original product warranty period This warranty does not apply to consumable products such as chemical reagents or consumable components of a product such as but not limited to lamps and tubing Contact Hach Company or your distributor to initiate warranty support Products may not be returned without authorization from Hach Company Limitations This warranty does not cover e Damage caused by acts of God natural disaster labor unrest acts of war declared or undeclared terrorism civil strife or acts of any governmental jurisdiction e Damage caused by misuse neglect accident or improper application or installation Damage caused by any repair or attempted repair not authorized by Hach Company e product not used in accordance with the instructions furnished by Hach Company Freight charges to return merchandise to Hach Company Freight charges on expedited or express shipment of warranted parts or product Travel fees associated with on site warranty repair This warranty contains the sole express warranty made by Hach Company in connection with its products All implied warranties including without limitation the warranties of merchantability and fitness for a particular purpose are expressly disclaimed Some states within the United States do not allow the disclaimer of implied warranties and if this is true in your state the above limitation may not apply
53. as NI JAY SNOBNGIG PNMVIGSIRI 050 6 088 090 9088 090 72089 050 79098 _wz 91 14 09 ANVdWOO HOVH 3WWN G3HIO34S 3SIWa3HIO N ay ONIONVHO OL NORE ek 0 0 S2088 O 0 S9088 0 0 42088 0 0 79088 Wr 6 lj 0 ANVdWOO HOVH WOX N TVAOYddW NOISSIWA3d 19381Q 3NOANY OL 0350105140 YO NOdsldH NMOHS LON YO I3HI3HM ONIHLANV 14 0 0 13 01 0 14 0 0 1301 0 3YNLOVANVW OL CISA 38 LAYd NI 31OHM NI AWW NOLYWAOANI ONI333NION3 TOI 3ON3CHNOO NI avans avans avans Av ans AINSSI SI LI ONIAV3d NO 08801051 NOLLVWYOANI NI SIHDIY A8V13ldO3d SWIV TO ANVdWOO HOVH 3OILON GuyaNviS asiyaNviS O3 Ria 31gv1 60 2627 0 6 0 V UIS 0 L3001 80 762 0 6 20 281 91 14059 20 2627 10 462 10 2827 145 140 0 amp ns 301 0 v 8ns 1301 0 Av ans G3ONVHN3 5 1 319 1 3OV3331NI G3lV1OSFOldO Pu uve v4Zv N d 1401 14 061 HION31XVW 0001 1 TANI VWOIS OL gt 0017625 N d woz 280 XILIWMOT 14 959 00ZrFSZS N d 116 1300W 0919 N d 3 40 13 061 DUALE HLONAT tus OE W9 Z 340 d ceca ALIDOTIA YALNdWOD OL sona EE E 3 NC N 43O4Z 3O AO Por pp invia
54. ature 0 to 70 C 32 to 158 F Specifications Table 1 911 Flow Meter Specifications continued Depth Compensated Temperature 0 to 70 C 32 to 158 F Material plastic outer shell with epoxy potting within Power Consumption lt 1 2 W 12 VDC Cable Material Urethane sensor cable with air vent Cable Lengths Available Standard 9 15 23 and 30 5 m 30 50 75 and 100 ft Custom 30 75 76 m 101 250 ft maximum Cable Diameter 0 91 cm 0 36 in Dimensions 2 3 cm H x 3 8 W x 13 5 cm L 0 9 H x 1 5 W x 5 31 in L 1 For temperatures above 40 C 104 F add 0 3 cm C 0 03 in F Table 2 940 Flow Meter Specifications General Certification cCSAus Approved for Class 1 and Division 1 Dimensions 21 9 cm dia x 60 L 8 625 in x 18 25 Weight 8 16 kg 18 Ib Enclosure Material PVC Enclosure Rating NEMA 6P IP 67 Operating Temperature 18 to 60 C 0 to 140 F Storage Temperature 40 to 60 C 40 to 140 F Power Source One 14 V 16 amp hour lithium rechargeable battery pack Battery Life 330 days typical with a 15 minute recording interval 1 level and 1 velocity data download once per week 10 C 50 F also affected by site conditions User Interface Optically Isolated Interface to IBM compatible PC Monitoring Intervals 1 2 3 5 6 10
55. battery retaining plate and install the two thumbscrews 10 Replace the flow meter end cap and retighten the 5 16 socket head cap screw Figure 15 940 Flow Meter Battery Pack 1 Battery Pack Location 30 Meter Installation 4 3 2 Installing the Battery Pack in the 911 DANGER Use only exact replacement battery packs purchased directly from the factory or a factory authorized outlet Any unauthorized battery substitution will void the intrinsically safe design and approval of the unit and could result in fire or explosion DANGER Utilisez exclusivement des batteries de rechange identiques que vous achetez directement aupr s de l usine ou d un point de vente agr par celle ci Tout remplacement non autoris d une batterie annule la conception s curit intrins que et l agr ation de l appareil et peut provoquer un incendie ou une explosion DANGER Never install remove or charge batteries in a hazardous location DANGER Vous ne devez jamais installer retirer ou recharger les batteries dans un environnement dangereux The entire battery assembly unscrews and separates to access the battery connector Cat No 5160 01 Follow the steps below to install the battery pack in the 911 1 Hold the 911 Flow Meter by the handle on the end opposite of the interface connectors and twist counter clockwise to open 2 Remove the rechargable battery pack Recharge or dispose of the battery 3 Reinstall t
56. cer for a coating This is rare but cleaning the transducer face may correct the problem If this is a constant problem due to site conditions coat the face of the sensor with a thin film of silicone grease to keep debris from clinging Make sure that the proper rubber isolation washers are used on the mounting bracket The transducer can resonate against steel mounting rails See section 6 1 1 1 on page 45 RS485 Time Out Flow meter did not receive data within the specified time Ifthe CPU has trouble communicating with the ultrasonic board RS485 time outs may occur Wait a few minutes and see if the trouble has stopped If it continues a problem with the ultrasonic velocity or CPU board may exist If the logging interval is 1 or 2 minutes or if conditions are poor or if the problem continues indefinitely try increasing the logging interval to capture more signals When using a combination of area velocity and ultrasonic sensors this condition may occur more frequently if site conditions are less than ideal This is not necessarily an indication of a defective sensor This condition may occur occasionally Check to see if pins are shorted Do not short pins on receptacle to avoid damage 48 Sensor Installation 6 2 In Pipe Ultrasonic Sensor The in pipe ultrasonic sensor is used in pipes where level measurement near the top of the pipe is desired The sensor reads the level until the liquid reache
57. ciated with data acquisition instrumentation could conceivably take up to 12 seconds to respond to a SCADA RS232 request Therefore the SCADA system must be designed to accommodate this potential communication lag For example in a Wonderware application running a Modbus ASCII DDE server the COM port reply time out must be set to 12 seconds This is the amount of time that the meter is given to reply to Modbus queries via this serial port Communication Handshaking The 940 Flow Meter contains minimal communication handshaking For the meter to identify an RS232 connection from an outside source and to keep the RS232 hardware active once communicating the Data Terminal Equipment DTE must assert and hold high the DTR line of the DB9 connector DSR of meter The 940 Flow Meter does not support RTS CTS hardware handshaking Note that DTE must be capable of handling a 12 second maximum response lag Pin Description Pin Description Pin Description Pin 1 Data Carrier Detect DCD Pin 4 Data Terminal Ready DTR Pin 7 Request to Send RTS Pin 2 Received Data RD Pin 5 Signal Ground SG Pin 8 Clear to Send CTS Pin 3 Transmitted Data TD Pin 6 Data Set Ready DSR Pin 9 Ring Indicator 1 Not used 96 SCADA Modbus System Guidelines D 13 Complications with Floating Point Values The manufacturer s implementation of the Modbus protocol was based on the idea that we would enable our flow meters to em
58. cinerate or expose to water If local government does not allow for the disposal of these batteries contact the Hach Company for proper disposal arrangements Storage Store all battery types in a cool dry place A low self discharge rate and excellent charging characteristics permit storage of Lithium lon batteries for up to one year without loss of efficiency or appreciable deterioration of performance At room temperature the self discharge rate of Lithium lon batteries is approximately 1 of rated capacity per month 89 Batteries and Chargers 90 Appendix D SCADA Modbus System Guidelines D 1 Introduction to SCADA Modbus Communications Use this section as a guide when using the Modbus ASCII protocol to communicate directly with the 940 Flow Meter via an RS232 or modem connection This guide assumes that the user has a working knowledge of Supervisory Control and Data Acquisition SCADA its components and the different topologies used to construct the communications network Because a basic understanding of the Modbus ASCII protocol is necessary the key pieces of the protocol will be described This section guides the users through the setup process by describing key points that need to be addressed for successful communication This section will not outline specific implementation details of any particular Man Machine Interface MMI or controller although examples may reference certain manufacturers for illustrative purpos
59. e data stored in both registers 40009 AND 40010 Consequently if the meter received a single request to read both Level 40007 40008 and Velocity 40009 40010 the request would have to be for an even number of registers for the meter to respond SCADA Modbus System Guidelines Problem 940 Flow Meter does not respond to any Modbus message requests Note It is imperative that the DTR be asserted prior to the communication session and that it remains throughout the entire communication session Response Check the DTR Signal Line The 940 Flow Meter will not respond to any Modbus messages until the device connected to the RS232 port asserts raises the DTR line DB 9 Pin 4 on the 1727 cable Response Check the Baud Rate The baud rate of the 940 Flow Meter is configured from 1200 19 200 and must match the baud rate of the device communicating with the meter Response Check the Communication Parameters The communications parameters of the 940 Flow Meter meter are fixed except for the baud rate and can not be changed The device communicating with the flow meter must be configured with the exact same communication parameters as the meter These parameters are as follows 7Data Bits e 1 Stop bit e 1 Start bit Even parity Response Check the Modbus Device Address assigned to the 940 Flow Meter Modbus devices including the 940 Flow Meter have a unique configured device address in the range of 1 to 247 This addres
60. e from the sampler interface and use the other manufacturer s sampler cable 38 Meter Installation Note It is the installers responsibility to ensure compatibility and proper connection of a non Sigma sampler to the Optically Isolated Sampler Interface 1 2 Remove the cover from the Optically Isolated Sampler Interface Disconnect all the wires from the terminals labeled J4 through J6 Do not remove the wires from terminals labeled J1 through J3 Loosen the compression nut on the sampler cable connector and remove the cable from the interface Insert the other manufacturer s sampler cable end into the cable connector of the Optically Isolated Sampler Interface 39 Meter Installation 40 Section5 Software and Communications 5 1 Required Software Programming and data retrieval are performed via an IBM compatible personal computer computer must have a serial port USB is not supported using an Optically Isolated Interface with one of the following software packages InSight Data Analysis Software is a program for small to medium sized flow monitoring jobs Flo Center Integrated Sewer System Management Software provides high end automated data collection and automated batch report processing using an unlimited number of meters Modicon Modbus Protocol 940 Only Flo Ware for Windows 911 Only 5 2 Programming and Analysis Options Built in flow equations Storage of 116 000 data points in battery backed
61. e to the user Note For return for recycling please contact the equipment producer or supplier for instructions on how to return end of life equipment producer supplied electrical accessories and all auxiliary items for proper disposal This symbol when noted on a product enclosure or barrier indicates that a risk of electrical shock and or electrocution exists and indicates that only individuals qualified to work with hazardous voltages should open the enclosure or remove the barrier This symbol when noted on the product identifies the location of a fuse or current limiting device This symbol when noted on the product indicates that the marked item can be hot and should not be touched without care This symbol when noted on the product indicates the presence of devices sensitive to Electro static Discharge and indicates that care must be taken to prevent damage to them This symbol if noted on the product indicates the need for protective eye wear 5e This symbol when noted on the product identifies the location of the connection for Protective Earth ground General Information 2 1 3 Hazardous Locations DANGER Although some Sigma products are designed and certified for installation in hazardous locations as defined by the National Electrical Code many Sigma products are not suitable for use in hazardous locations It is the responsibility of the individuals who are installing the p
62. ed flow condition Figure 50 Installation for Custody Transfer or a Billing Arrangement 85 Channel Installation Options 86 Appendix C Batteries and Chargers DANGER Never install remove or charge batteries in a hazardous location DANGER Vous ne devez jamais installer retirer ou recharger les batteries dans un environnement dangereux C 1 Lead Acid Gel Cell Batteries for 911 Flow Meter The manufacturer s lead acid batteries are designed to prevent electrolyte leakage from the terminals or case The electrolyte is suspended in a gel which ensures safe efficient operation in any position Gel cells are classified as Non Spillable and meet all requirements of the International Air Transport Association Maintenance The manufacturer s lead acid batteries are maintenance free DANGER The use of chargers other than those provided by the manufacturer for use with these batteries is not recommended and may damage the battery or shorten its life DANGER II est d conseill d utiliser des chargeurs autres que ceux fournis par le fabricant pour ces batteries car ils risquent de les endommager et de r duire leur vie utile Charge The manufacturer s lead acid cells are designed to be fully charged in 22 to 24 hours using their lead acid battery charger Do not exceed 24 hours or life of the battery may be damaged or shortened The charge rate is 500 mA dc The LED is lit indicating the battery is charging The batter
63. eplace the desiccant material A small clip holds the desiccant cartridge in place Pull the cartridge straight out of the clip to remove it Table 9 Replacement Desiccant Description Part Number Model 911 Battery Compartment Desiccant Cartridge 4933 Model 940 Battery Compartment Desiccant Cartridge 4967 Bulk Desiccant Refill 1 5 Ib 3624 7 2 Maintaining the O Ring Gasket on the End Cap Note Do not use petroleum jelly to lubricate the O rings Two O ring gaskets are installed in each flow meter end cap The end caps maintain the water tight seal on the flow meter Use care when the end caps are removed do not soil cut or nick the gaskets Replace them immediately if any physical damage is apparent Use a light coating of O ring lubricant to help maintain a water tight seal Table 10 on page 57 lists replacement O ring gaskets Table 10 Replacement O rings Description Part Number Model 911 End Cap O ring 2 required 4912 Model 940 End Cap O ring 2 required 4807 57 Maintenance 7 3 Cleaning the Flow Meters Clean the outside of the logger case with warm water and mild detergent Do not use solvents or harsh cleaners to clean the logger Do not use high pressure washing equipment to clean the case 7 4 Storing the Flow Meters Remove all batteries from the logger when storing for long periods more than 3 months Store the sensors in a dry area Make sure that all desiccant
64. er Read Holding Register Addresses Name Type Size bits of Registers Start de Start Registers Total Flow 1 Float 32 2 00 4A 40075 40076 Total Flow Units Integer 16 00 50 40081 Total Flow Multiplier Float 32 2 00 51 40083 40084 Table 17 SCADA Modbus Units of Measure Codes Unit Code Unit Code ML 1 GPH 26 AF 2 LPS 27 CF 3 LPM 28 GAL 4 LPH 29 L 5 MGD 30 M3 6 PH 31 IN 7 ORP 32 CM 8 PPM 33 FT 9 PPB 34 M 10 MGL 35 CM2 11 PCTSAT 36 FT2 12 MSIEMENS 37 IN2 13 MICROSIEMENS 38 M2 14 GRAMSPERKG 39 AFD 15 PCTPERDEGC 40 CFS 16 DEGREE_C 41 94 SCADA Modbus System Guidelines Table 17 SCADA Modbus Units of Measure Codes Unit Code Unit Code CFM 17 DEGREE_F 42 CFH 18 MILS 43 CFD 19 VOLTS 44 CMS 20 FPS 45 CMM 21 MPS 46 CMH 22 PCT_O2 47 CMD 23 PCT_H2S 48 GPS 24 PCT_LEL 49 GPM 25 VDC 50 D 10 Query The Modbus ASCII query must take the form shown below that specifies the starting register and number of registers to be read aan us i sia LRC lt CR gt lt LF gt High Low For example to read the level channel of the 940 Flow Meter the query must be as indicated in Table 18 Table 18 Channel Query to Read Level Example Start Slave Address 01 Function 03 Starting Address High 00 Starting Address Low 06 No of Registers High 00 No of Registers Low 02 LRC F4 Stop lt CR gt lt LF gt
65. es The description of the Modbus ASCII protocol is provided for reference only and is not intended as a tutorial The scope of this section is limited to the description of Modbus ASCII as it pertains to the 940 Flow Meter Modbus an open protocol determines how each instrument knows its device address recognize a message addressed to it determine the type of action to be taken and extract any data or other information contained in the message The flow meter and Man Machine Interface MMI communicate using a master slave technique in which only the master can initiate queries to a slave 940 The 940 is always considered the slave never a master The master can address individual 940 Flow Meters or can broadcast a message to instruments within its scope Responses are never returned to broadcast queries from the master The Modbus protocol establishes the format for the master s query by placing into it the device address a function code defining the requested action any data to be sent and an error checking field The flow meter s response message is constructed using the Modbus format which confirms the action to be taken any data to be returned and an error checking field D 2 ASCII Transmission Mode The 940 Flow Meter is designed to communicate on standard Modbus networks using Modbus ASCII In ASCII mode messages start with a colon and end with a carriage return line feed pair The allowable characters transmitted
66. evel in m cm ft 90 days typical with a 15 minute recording interval Assumes data download once per week Flow gps gpm Ips Ipm Iph mgd afd cfs cfm cfh cfd m3s m3m m3h m3d Totalized Flow gal ft3 acre ft L m3 Data Storage Capacity 400 days of 1 level reading and 1 velocity reading at a 15 minute recording interval Data Types Level and Velocity Storage Mode Wrap or Slate Communications Serial connection via optically isolated interface to IBM compatible computer with Sigma analysis software Submerged Area Velocity Sensor Velocity Measurement Method Doppler Ultrasound Twin 1 MHz piezoelectric crystals Typical Minimum Depth 2 cm 0 8 in Zero Stability 0 015 m s 0 05 ft s Accuracy 2 of reading Recommended Range 1 52 to 6 10 m s 5 to 20 ft s Depth Measurement Method Pressure transducer with stainless steel diaphragm Accuracy static 0 16 full scale 1 5 of reading at constant temp 2 5 C 0 20 full scale 1 75 of reading from 0 to 30 C 32 to 86 F 0 25 full scale 2 1 of reading from 0 to 70 C 32 to 158 F Velocity Induced Depth Error Compensated based on pipe geometry and flow velocity Depth Range Standard 0 3 m 0 10 ft Extended 0 9 m 0 30 ft Submerged Area Velocity Sensor continued Air Intake Atmospheric pressure reference is desiccant protected Operating Temper
67. ged but the charge cycle is starting If the flashing yellow charge LED does not stop flashing within 1 hour the battery pack is shorted and should be disposed of properly The battery is fully charged when the yellow charge LED light goes off Temperature Excessive heat ruins batteries At higher temperatures the electrical capacity that can be taken out of a battery increases At lower temperatures the electrical capacity that can be taken out of a battery decreases Avoid placing batteries near heat sources of any kind To maximize battery life operate the battery at an ambient temperature of 20 C 70 F The permissible operating temperature range is 15 to 50 C 5 to 120 F Use in the 5 to 35 C 47 to 95 F temperature range is recommended Disposal The Lithium lon battery pack assembly for the 940 Flow Meter is rechargeable Follow local applicable disposal guidelines for Lithium lon type batteries The entire battery housing is meant to be disposed of after the service life of the battery Do not attempt to open the case to gain access to the batteries There are no user serviceable parts inside Batteries and Chargers The 940 Flow Meter may use two different types of Lithium based battery These batteries require special disposal requirements and must be treated as hazardous material Air cargo is the only acceptable air shipment permitted The batteries must be individually wrapped and boxed separately Do not puncture in
68. h permanently damages the sensor Refer to Table 11 for acceptable cleaning solutions 2 Remove the screws from the protective cover Figure 33 and Figure 34 on page 61 3 Remove the cover and gasket 4 Swirl the sensor carefully in an appropriate cleaning solution to remove soil Use a spray or squeeze bottle to wash away heavier deposits 5 Clean the gasket and the cover Replace the gasket Cat No 7722000 if it is torn or damaged Level readings are adversely affected if the gasket is damaged or not installed 6 Reattach the gasket and the cover note orientation in Figure 34 on page 61 Tighten the screws until the gasket starts to compress 7 If using an oil filled sensor continue to follow the procedure mentioned in section 7 8 3 on page 62 Table 11 Cleaning Solutions Acceptable Unacceptable Dish Detergent and Water Concentrated Bleach Window Cleaner Kerosene Isopropyl Alcohol Gasoline Dilute Acids Aromatic Hydrocarbons 60 Figure 33 Removing the Protective Cover Non Oil Sensor Maintenance 1 Screws 86 32 x 5 16 4 Pressure Transducer 2 Protective Cover 5 Sensor 3 Gasket Figure 34 Removing the Protective Cover Oil filled Sensor 1 Screws 6 32 x 5 16 4 Gasket 2 Protective Cover 5 Pressure Transducer 3 Screw set 422 56 6 Sensor 61 Maintenance 7 8 3 Replenishing the Oil The manufacturer recommends inspecting the
69. he 911 scie nia aid 31 4 3 3 Battery Compartment Desiccant Hebe eb end 32 4 3 4 Estimating the Battery Life Eder eoa e 32 4 3 5 Recharging the Lithium lon Battery Pack for Model 940 33 4 3 6 Recharging the Battery Pack for Model 911 34 4 4 Wiring the RS232 Interface aria ille 35 4441 RS232 Se al Prt e cs 35 4 5 Wiring the Sampler Interface on Model 940 a 36 4 6 Sampler Receptacle 940 37 4 6 1 Connecting the Sampler Cable to a 940 Flow Meter 38 4 6 2 Connecting a Non Sigma Sampler to a 940 Flow Meter 38 Section 5 Software and Communications 41 Reg lred S ofiWare sica rin LI aerea Li 41 5 2 Programming and Analysis Options recen u a 41 Section 6 Sensor Installation 43 6 1 Downlook Ultrasonic Sensor seine rail ile 43 6 1 1 Installing the Downlook Ultrasonic Sensor 43 6 1 2 Troubleshooting the Downlook Ult
70. he bottom end cap using a slight twisting motion until its slots align with the retaining clips Figure 38 2 Remove the end cap gently by grasping it and pulling it straight out 3 Pour the desiccant beads out of the canister 4 Hold the canister up to the light and inspect the hydrophobic filter If there is a small dim light spot while looking through the hole the filter is in good condition If there is a bright light spot the filter is probably torn Replace the filter e If the desiccant beads are completely saturated with water or the filter has been saturated with water or grease replace the filter Note If the filter needs to replaced complete the Replacing the Hydrophobic Filter section 7 8 5 1 on page 65 then continue with step 5 5 Refill the canister tube with blue desiccant beads Cat No 3624 Inspect the O ring Cat No 5252 on the bottom cap for cracks pits or evidences of leakage Replace if necessary Note Applying O ring grease to the new or dry O rings improves the ease of insertion sealing and life span of the O ring 6 Make sure that the O ring is clean and free of dirt or debris before replacing the end cap 7 Reinstall the end cap Figure 38 Removing the Bottom End Cap 1 End Cap 2 Desiccant Container 64 Maintenance 7 8 5 1 Replacing the Hydrophobic Filter A single Teflon hydrophobic filter Cat No 3390 is installed in the top of
71. he rechargable battery Attach the battery connector to the center mounted connector at the bottom of the 911 case Figure 16 Note Both connectors are physically polarized 4 Place the two connectors together Gently try to pull the two connectors apart to ensure that the connectors are securely latched together Do not use excessive force or permanent damage to the connectors may occur 5 Tighten the screw of the battery pack assembly onto the flow meter Figure 16 911 Flow Meter Case and Battery Packs 1 911 Flow Meter Case 2 12 Amp hour rechargeable cell battery pack 31 Meter Installation 4 3 3 Battery Compartment Desiccant The battery compartment in both the 911 and 940 Flow Meters is kept dry with a small desiccant cartridge to avoid moisture damage to the batteries and power circuitry Figure 17 and Figure 18 When the beads are blue they can remove moisture from the enclosure When they turn pink they cannot absorb any more moisture When the blue desiccant turns pink replace the desiccant Figure 17 911 Case Battery End with Inserted Desiccant 1 Desiccant Figure 18 940 Case Battery End with Inserted Desiccant 1 Desiccant 4 3 4 Estimating the Battery Life When using the battery pack battery life is based on 32 Number of sensors installed more sensors decrease battery life Recording intervals longer intervals increase battery life
72. iece of electrical tape over the side port to prevent oil from leaking out Remove the tape from the sensor prior to zeroing and installing the sensor Figure 35 Loading the Cartridge into the Dispensing Gun 1 Dispensing Gun 2 Silicone Oil Cartridge 62 Maintenance 2 LE EL Es Figure 36 Attaching the Feed Tube and Syringe o oje Figure 37 Oil Replenishment 1 Sensor 3 Side port 2 Setscrew 4 Syringe 7 8 4 Changing the Submerged Area Velocity Sensor Desiccant The desiccant canister contains beads of silica gel which ensure proper orientation of the pressure transducer When the beads are blue they can remove moisture from the air When they are pink they are saturated and cannot absorb any more moisture from the air and they must be replaced immediately Important Note When the beads begin to turn pink replace or recondition the beads Permanent damage to the sensor may occur if the desiccant is not maintained Never operate the sensor without the proper desiccant When rejuvenating beads remove them from the canister and heat at 100 180 C 212 350 F until the beads turn blue If the beads do not turn blue replace them with new beads Do not heat the canister 63 Maintenance 7 8 5 Replacing the Desiccant Note Replacing the desiccant does not require that the desiccant container be removed from the desiccant box 1 Twist t
73. ires dans les mati res suivantes Contr le avant entr e Ventilation Proc dures d entr e Proc dures d vacuation et de secours et M thodes de travail s res On April 15 1993 OSHA s final ruling on CFR 1910 146 Permit Required Confined Spaces became law This standard directly affects more than 250 000 industrial sites in the United States and was created to protect the health and safety of workers in confined spaces 2 1 5 1 Definition of Confined Space 10 Confined Space is any location or enclosure that presents or has the immediate potential to present one or more of the following conditions e atmosphere with less than 19 5 or greater than 23 5 oxygen and or more than 10 ppm Hydrogen Sulfide H2S e that may be flammable or explosive due to gases vapors mist dust or fibers e Toxic materials which upon contact or inhalation could result in injury impairment of health or death Confined spaces are not designed for human occupancy They have restricted entry and contain known or potential hazards Examples of confined spaces include manholes stacks pipes vats switch vaults and other similar locations General Information Important Note Standard safety procedures must always be followed prior to entry into confined spaces and or locations where hazardous gases vapors mist dust or fibers may be present Note Before entering any confined space check with the employe
74. iring or terminations The only exceptions allowed for minimum clearances are e All intrinsically safe circuit conductors are Type MI or MC cables or e All non intrinsically safe circuit conductors are raceways or Type MI or MC cables where the sheathing or cladding is capable of carrying fault current to the ground Raceways Raceways should be used to keep intrinsically safe wire and non intrinsically safe wire separated Wire lacing or ties are considered acceptable methods All raceways for the intrinsically safe system are identified with permanently affixed labels with the wording Intrinsic Safety Wiring or equivalent Conductor Identification Intrinsically safe conductors must be identified either by color coding with light blue jacketed cable or by tagging at regular intervals of every 7 62 m 25 ft as identified by NEC National Electric Code Voltage Limitations The electrical equipment for non hazardous location must not contain a source voltage greater than 250 V unless sufficient means have been employed to prevent the shorting of a source voltage greater than 250 V onto the non intrinsically safe terminals of the associated apparatus General Information Multi Conductor Cable Conductors may be part of a multi conductor cable provided that all conductors within the cable are intrinsically safe Each intrinsically safe conductor must have an insulation thickness of 0 25 mm 0 010 in which is rated for the
75. iring the RS232 Interface DANGER Meter Installation All connections to the flow meter must be made in a non hazardous location DANGER Tous les raccordements au d bitm tre doivent tre effectu s dans un environnement qui ne pr sente aucun danger All RS232 interface wiring must follow the installation drawings in section 4 1 on page 15 4 4 1 RS232 Serial Port DANGER The RS232 Opto Isolated Interface must be located a non hazardous location DANGER L interface a isolation optique RS232 doit se trouver en un emplacement non dangereux conform ment aux sch mas de contr le de l installation Note A PC or laptop must be used in a non hazardous location The high speed RS232 serial port communicates with a PC via an optically isolated interface Figure 19 on page 35 The Opto Isolated Interface Cat No 4087 is used only for data downloading and remote programming This interface isolates the energy potential in the PC from hazardous locations and from the 911 or 940 Flow Meters Figure 19 RS232 Communications Setup location Cat number 4087 1 Use approved seal to minimize passage of gases or 3 PC compatible laptop or desktop located in a vapors from a hazardous location to a non hazardous non hazardous location for downloading data location 2 RS232 Opto Isolated Interface in a non hazardous 4 940 or 911 Flow Meter in a hazardous location DANGER Route the cable through an a
76. ity having jurisdiction shall have a final say DANGER II est interdit de proc der toute installation ou configuration d un d bitm tre qui n est pas explicitement d taill e dans les sch mas de contr le de l installation ci dessous Dans tous les cas c est l autorit locale responsable qui aura le dernier mot Figure 1 on page 16 through Figure 13 on page 28 are approved control drawings These certified drawings detail the ONLY approved method of installing the 911 and 940 Flow Meters Additionally these drawings list both part number description and the only certified sensors probes and associated equipment to be used with these meters Any substitutions automatically void the Intrinsically Safe certification of the flow meter and could result in fire or explosion 15 L 5 9 L 8 130 193HS 1HOBM 21 31VOS ONIMYAC TIVOS ION Oq e e 3Sva8 116 MSN TONINOO ONIMV3O o 10 E xx 001 52088 001 59088 00 2088 001 19088 14 001 68508 OO ONYBAO1 as iov tendi 510 5 088 520 59088 90 71088 20 79088 _We zz 13 SZ da 0098 wae
77. l 8 Figure 9 Control Drawing 940 V8 24 Meter Installation l 5 9 1 8 130 133HS 4HOBM 21 31VOS ONIMYACIIVOSLON oa a fad Ad ON 325 L NZ Vente 1484 Valin OVA Orc OF6 OI313WO39 I3 dNI3INI j STE STONY ool szoge 001 59088 001 2088 001 19088 tus og Ld JO3INOO ui sura SA 920 92088 S 0 s9o89 220 72088 920 9088 __ 6 22 14 SZ SS n ENS 0052 o X SIHL 050 22088 060 29088 050 2088 oso v9088 uz SL Ld 05 YG 0095 nda SHONN ROSON D ONONVHO OL 020 52088 020 59088 020 72088 0 0 9088 wri 6 14 0 ANVdINOO HOVH ava 03410345 SSTINN ANAND LOVE OR INDIA IVAOYddY Ld 06 0 1301 0 14080 1401 0 HLSN31 NOISSIW33d 1031A In OHIIM OL GISOTOSIA YO
78. l 2 Float 32 2 00 0 40013 40014 3 Float 32 2 00 40015 40016 4 Float 32 2 00 10 40017 40018 Channel 5 D O Temp Float 32 2 00 12 40019 40020 Channel 6 Conductivity Float 32 2 00 14 40021 40022 Channel 7 Cond Temp Float 32 2 00 16 40023 40024 Level 2 Float 32 2 00 18 40025 40026 Velocity 2 Float 32 2 00 1A 40027 40028 Flow 1 Float 32 2 00 20 40033 40034 Power Float 32 2 00 26 40039 40040 93 SCADA Modbus System Guidelines Table 15 Channels Units of Measure Read Holding Register Addresses Name Type Size bits of Registers Start ec Start 1 Registers Temperature Integer 16 1 00 31 40050 Rainfall Integer 16 1 00 32 40051 pH or ORP Integer 16 1 00 33 40052 Level 1 Integer 16 1 00 34 40053 Velocity 1 Integer 16 1 00 35 40054 Channel 1 Integer 16 1 00 36 40055 Channel 2 Integer 16 1 00 37 40056 Channel 3 Integer 16 1 00 38 40057 Channel 4 D O Integer 16 1 00 39 40058 Channel 5 D O Temp Integer 16 1 00 3A 40059 Channel 6 Conductivity Integer 16 1 00 3B 40060 Channel 7 Cond Temp Integer 16 1 00 3C 40061 Level 2 Integer 16 1 00 3C 40061 Velocity 2 Integer 16 1 00 3E 40063 Flow 1 Integer 16 1 00 41 40066 1 The addresses shown above return a code that represents the appropriate unit of measure Table 16 Flow Totaliz
79. lled Submerged AV Sensor 0 30 ft range 50 ft cable with connector 88074 050 I S Oil Filled Submerged AV Sensor 0 30 ft range 75 ft cable with connector 88074 075 I S Oil Filled Submerged AV Sensor 0 30 ft range 100 ft cable with connector 88074 100 I S Standard Submerged AV Sensor 0 10 ft range 30 ft cable with connector 88065 030 I S Standard Submerged AV Sensor 0 10 ft range 50 ft cable with connector 88065 050 I S Standard Submerged AV Sensor 0 10 ft range 75 ft cable with connector 88065 075 I S Standard Submerged AV Sensor 0 10 ft range 100 ft cable with connector 88065 100 I S Standard Submerged AV Sensor 0 30 ft range 30 ft cable with connector 88075 030 I S Standard Submerged AV Sensor 0 30 ft range 50 ft cable with connector 88075 050 I S Standard Submerged AV Sensor 0 30 ft range 75 ft cable with connector 88075 075 I S Standard Submerged AV Sensor 0 30 ft range 100 ft cable with connector 88075 100 8 3 Sensor Mounting Rings and Bands Description Part Number Submerged Pressure Velocity Mounting Rings for 6 24 in Pipes 6 inches 1361 8 inches 1362 67 Replacement Parts and Accessories 8 3 Sensor Mounting Rings and Bands continued Description Part Number 10 inches 1363 12 inches 1364 15 inches 1365 18 inches 1366 21 inches 1353 24 inches 1370 Submerged Pressure Velocity Mounting Bands for 15 to 42 in Pipes 15 inches 9706100 18 inches 9706200 21 inches 9706300
80. ly 65 Maintenance 66 Section 8 8 1 Flow Meter Replacement Parts Replacement Parts and Accessories Description Part Number Battery 12 AH Model 911 only rechargeable 5160 01 Charger lead acid battery Model 911 only 913 RS232 Intrinsic Safety Barrier 4087 AC Power 115 V with 2 AH battery backup and intrinsically safe barrier 1004 Battery pack rechargeable Lithium lon Model 940 only 6608500 Charger Lithium lon battery pack Model 940 only 100 240 VAC 50 60 Hz 6678000 Desiccant Cartridge for battery 4967 Ladder Mount Ladder Rung requires P N 4839 4874 Ladder Mount Mounting Bracket requires P N 4874 4839 Manhole Spanner Bars 18 27 in used with suspension cable 9542 Manhole Spanner Bars 28 48 in used with suspension cable 9557 Suspension cable for hanging flow meter 4920 User Manual 4979 8 2 Sensors Description Part Number In Pipe Ultrasonic Level Sensor 4741 75 kHz Ultrasonic Sensor 5233 05 Submerged Area Velocity Sensors I S Oil Filled Submerged AV Sensor 0 10 ft range 30 ft cable with connector 88064 030 I S Oil Filled Submerged AV Sensor 0 10 ft range 50 ft cable with connector 88064 050 I S Oil Filled Submerged AV Sensor 0 10 ft range 75 ft cable with connector 88064 075 I S Oil Filled Submerged AV Sensor 0 10 ft range 100 ft cable with connector 88064 100 I S Oil Filled Submerged AV Sensor 0 30 ft range 30 ft cable with connector 88074 030 I S Oil Fi
81. maximum temperature rating of the approved device to which it is connected The intrinsically safe wiring must be color coded with light blue if no other wiring is light blue or appropriately tagged Seals A seal must be provided at the point the intrinsically safe wire passes between the hazardous and non hazardous locations to prevent the hazardous atmosphere from entering the unprotected control room environment The seal specification is that it must not pass more than 198 cm 0 007 ft3 of air per hour at a pressure equivalent to 6 in 1493 Pa of water While this is the same specification for the sealing requirements of an explosion proof system it may not be necessary to employ those seals Grounding The 911 and 940 Flow Meters and associated Opto Isolated Interfaces do not require grounding or bonding Under no circumstances should any attempt be made to ground or bond the 911 or 940 Flow Meters or Opto Isolated Interfaces 2 1 5 Confined Space Entry Important Note The following information is provided to guide users of 911 and 940 Flow Meters on the dangers and risks associated with entry into confined spaces DANGER Additional training in Pre Entry Testing Ventilation Entry Procedures Evacuation Rescue Procedures and Safety Work Practices is necessary to ensure against the loss of life in confined spaces DANGER Pour viter les accidents mortels dans les espaces confin s il faut organiser des formations suppl menta
82. n for Europe 72 For technical support repair service and ordering information please refer to the contact information below For all countries except France Spain and Great Britain Flow Tronic RUE J H COOL 19a B 4840 Welkenraedt Belgium Ph 32 87 899797 or 899799 Fx 32 87 899790 Email info flow tronic com www flow tronic com For France Spain and Great Britain France HACH LANGE FRANCE 5 5 33 Rue du Ballon 93165 Noisy le Grand Telephone 33 0 1 48 15 68 70 Fax 33 0 1 48 15 80 00 Email info hach lange fr www hach lange fr Spain HACH LANGE S L U C Larrauri 1C 2 PI 48160 Derio Bizkaia Telephone 902 131441 94 6573388 Fax 94 6573397 E mail info hach lange es www hach lange es Great Britain HACH LANGE LTD Pacific Way Salford Manchester M50 1DL Telephone 0 161 872 1487 Fax 0 161 872 7324 Email sales hach lange co uk www hach lange co uk Section 11 Limited Warranty Hach Company warrants its products to the original purchaser against any defects that are due to faulty material or workmanship for a period of one year from date of shipment unless otherwise noted in the product manual In the event that a defect is discovered during the warranty period Hach Company agrees that at its option it will repair or replace the defective product or refund the purchase price excluding original shipping and handling charges Any product repaired or replaced under this warr
83. n the sensor the reflector and the bottom of the sensor housing The 940 flow meter is equipped with an invisible range feature to prevent false echoes from top of channel walls ladder rungs shelves etc A user selected range is defined that is invisible to the flow meter Do not extend the invisible range to where it meets or overlaps the highest expected level in the channel Measure the distance between the bottom of the sensor housing and the object that is to be excluded from the level measurement Add 18 3 cm 7 2 in to the measured distance to obtain the total invisible range deadband distance Enter the total invisible range value into the application software 6 2 4 Protecting the In Pipe Ultrasonic Sensor Keep the sensor and the reflector free of grease and dirt Since the logger listens for the relatively faint sound of the returning echo a heavily coated sensor will not be able to detect the echo well and may not provide accurate level measurement 51 Sensor Installation 6 2 5 Troubleshooting the In Pipe Sensor During surcharged conditions the ultrasonic level gives random depth readings that need to be edited in the application software Symptoms of this hydraulic condition occur when the level appears erratic within 5 7 cm 2 25 in of the pipe diameter The readings first appear to be flat lined Later the erratic readings that in some cases exceed the pipe diameter occur If the hydraulics are freq
84. n the slave responds to the master it echoes the function code field to indicate a normal response In the event of an error such as parity error LRC error or a request that cannot be handled the slave will not respond and the master will eventually process a time out condition The data field of an ASCII message frame consists of n pairs of ASCII characters that represent data sent to or from a slave device flow meter The data field contained in the master request contains additional information that is required by the slave before any action takes place This may include channel register addresses the number of registers to read and the actual byte count in the data field For example if a master requests that the flow meter read the current status of a group of channels function code 03 the data field specifies the starting register and how many registers are to be read If no error occurs the data field of the response from the meter to the master contains the data requested The LRC field of an ASCII message frame consists of two ASCII characters that provide an additional level of error checking to verify the integrity of the communication media The LRC field is one byte that contains an 8 bit binary value The LRC value is calculated by the transmitting device which appends the LRC to the end of the message The receiving device recalculates the LRC and compares it against the LRC value of the incoming message If the two values a
85. nce and generate high speed flows in the immediate vicinity of the obstruction Avoid any sites with slow moving flows that encourage the build up of silt in the invert or channel Excessive silting around the sensor may inhibit the Doppler signal and decrease sensor accuracy and may affect depth measurement accuracy Avoid sites with deep rapid flows that make it physically difficult or dangerous to install the sensor Avoid sites with high velocity low depth flows Splash over and excessive turbulence might be present around the sensor and data may be inaccurate Sensor Installation 6 3 2 1 Proper Strain Relief of Submerged Area Velocity Sensor Cable Attach the desiccant hub to the instrument handle to provide a strain relief for the sensor cable and connector Figure 28 Figure 28 Proper Strain Relief 1 Flow Meter 2 Desiccant Hub 3 Carabineer 4 Lanyard 6 3 3 Connecting the Submerged Area Velocity Sensor to the Mounting Bands Important Note If using an oil filled sensor replenish the oil prior to mounting the sensor to a mounting band Refer to section 7 8 3 on page 62 for oil replenishment instructions if applicable 1 Attach the sensor to the mounting band Mounting bands come with pre drilled holes for direct mounting of the sensor to the band 2 Route the cable along the edge of the band and fasten the cable to the mounting band with nylon wire ties Figure 29 on page 54 to red
86. nd a Low Order word Additionally each word can be broken down into a high order byte and a low order byte Table 20 and Table 21 depict how a IEEE floating point value is usually represented and how the Modicon stores a floating point value The complications arise because Modicon doesn t store floating point values in this standard IEEE format Modicon stores floating point values the opposite way with the Low order word in the first register and the High order word in the second register Table 20 IEEE Floating Point Representation First Register i e 4001 Second Register i e 4002 High Word High Byte High Word Low Byte Low Word High Byte Low Word Low Byte Table 21 Floating Point Values Representation First Register i e 4001 Second Register i e 4002 Low Word High Byte Low Word Low Byte High Word High Byte High Word Low Byte Since the Modbus protocol doesn t define how floating point values are handled or stored some Modbus capable servers incorrectly use the normal High word Low word format for converting the Modbus message response to the client application Since Modicon stores the floating point values in the opposite order the result is that the client application may receive an incorrect representation of the floating point value from the Modbus capable server 97 SCADA Modbus System Guidelines D 14 Port Expanders and Pr
87. ng Information for Outside the U S A and Europe Hach maintains a worldwide network of dealers and distributors To locate the representative nearest you send an e mail to hachflowsales hach com or visit ww hachflow com Technical Support Technical and Customer Service Department personnel are eager to answer questions about our products and their use In the U S A call 1 800 635 1230 Outside the U S A and Europe send E mail to hachflowservice hach com or call 1 301 874 5599 Repair Service Authorization must be obtained from Hach Company before sending any items for repair To send the monitor to the factory for repair 1 Identify the serial number of the monitor unit 2 Record the reason for return 3 Callthe Customer Service Department 1 800 368 2723 and get a Service Request Number SRN and shipping label 4 Use the shipping label provided and ship the equipment in the original packaging if possible Note Do not ship manuals computer cables or other parts with the unit unless they are required for repair 5 Make sure the equipment is free from foreign debris and is clean and dry before shipping Sensors returned without cleaning will be charged a fee 6 Write the SRN number on the shipping box 7 Make sure that all return shipments are insured 8 Address all shipments to Hach Company 5600 Lindbergh Drive North Dock Loveland Colorado 80539 0389 U S A Attn SRN XXX 71 Section 10 Contact informatio
88. ng the Electronics Compartment u 58 FON EIE 58 7 0 2 Memory eni liano 58 7 7 Replacing the Batteries in the RS232 Interface us 59 7 8 Maintaining the Submerged Area Velocity Sensor 59 7 8 1 Cleaning the 59 7 8 2 Cleaning the Submerged Area Velocity Sensor Oil filled and Non oil 60 7 8 3 Replenishing the Oil alia 62 7 8 4 Changing the Submerged Area Velocity Sensor Desiccant 63 7 8 5 Replacing the Desiccant 64 Section 8 Replacement Parts and Accessories 67 8 1 Flow Meter Replacement Parts iii 67 IAE CIO 67 8 3 Sensor Mounting Rings and ice ati 67 8 4 Ultrasonic Sensor Mounting Hardware se 68 8 5 Mounting Plate Hardware for Directly Mounting to Pipe Wall 69 Section 9 Contact Information 71 Section 10 Contact information for Europe rnrn ennt 72 Section 11 Limited Warranty
89. ng with Primary Devices Submerged Probe Preferred Head Measurement Point View Upper Transtion Throat e Lower Transition Preferred Head Measurement Point Water Surface Small jump should occur here Elevation View D Downstream Depth Conduit Diameter Upstream Depth 2 Figure 42 Palmer Bowlus Flume with Integral Approach 78 Working with Primary Devices Submerged Probe Preferred Head Measurement Point Top View Upper Transition Throat Lower Transition Preferred Head Measurement Point Water Surface Small jump should occur here Elevation View CZ ZZ D Conduit Diameter Downstream Depth 2 Upstream Depth Figure 43 Leopold Lagco Flume 79 Working with Primary Devices Top View Inlet Bulkhead Head Measurement Section Elevation View Approach Section Pipe Stub Figure 44 H Flume Top View Em r6TT amp amp lt Elevation View Figure 45 Round Pipes 80 Appendix B Channel Installation Options Figures 46 through 50 show how to install the 911 and 940 Flow Meters in various applications Figure 46 shows Model 911 installed in a manhole with a single level velocity sensor stored in the small diameter pipe Figure 46
90. nia 13 Software and Communications 41 Special Output Sample Output 38 Specifications etie 3 SK cR RA PR 3 escis 4 Storing the Flow Meters 58 V Vertical Drops iaia ila 13 Warranty m 73 101
91. oil in the sensor for large air bubbles during the customer scheduled service duty cycle and prior to every installation Small bubbles less than in diameter of air within the oil do not affect performance Larger bubbles may minimize the anti fouling benefit of the oil 1 2 Remove the yellow tape on the sensor if the sensor is new Remove any debris from the sensor Load the oil cartridge into the dispensing gun Figure 35 Twist the feed tube onto the cartridge and attach the syringe tip to the feed tube Figure 36 on page 63 Press the dispenser gun handle to purge any air bubbles from the syringe tip Remove the set screw in the transducer cover with the supplied 0 035 hex wrench Retain the set screw Insert the syringe tip slowly into the set screw hole and dispense the oil Figure 37 on page 63 Note While dispensing the oil hold the probe at an angle to allow the air to be pushed out the side port Figure 37 on page 63 Important Note Slowly insert the syringe tip and do not dispense oil during insertion or damage to the transducer may occur if too much pressure is applied Continue to dispense the oil until all the air bubbles are removed Continue to dispense the oil while removing the syringe from the set screw hole to prevent air bubbles Replace the set screw until it is flush with the transducer cover and remove any excess oil around the screw hole or on the sensor Clean the entire probe and place a p
92. ompensate for the difference in height between the submerged sensor and the crest of the weir This allows the user to place the sensor at an arbitrary height in the weir as long as it is located below the crest of the weir and at the proper distance upstream from the weir plate See Figure 40 on page 76 for details on head measurement locations in a weir In the text example below e distance between the crest of the weir bottom of the V and the submerged sensor is 4 in 10 cm e distance between the surface of the water and the submerged sensor is 6 in 15 cm e level of water which is contributing to flow is 2 in 5 cm water flowing over the weir Entering 2 in 5 1 cm using the LEVEL ADJUST key provides the desired offset As the water level falls to the bottom of the V the flow meter reads zero level and zero flow If the level falls below the crest of the weir due to evaporation or other reason the level reads a negative number and the flow remains at zero The key to proper level setting is to adjust the level using the LEVEL ADJUST key to the level that is contributing to flow In a round pipe the level contributing to flow is the distance from the surface of the water to the invert bottom of the pipe In a flume the level contributing to flow is the distance from the surface of the water to the floor of the flume A 3 Types of Primary Devices Use the primary device illustrations
93. or Downstream Position FLOW Figure 31 Placing the Sensor into the Flow 55 Sensor Installation 56 Section 7 Maintenance DANGER Only qualified personnel should conduct the tasks described in this section of the manual DANGER Seul un technicien qualifi peut effectuer les t ches d installation d crites dans cette section du manuel DANGER All maintenance activities related to flow meter and flow meter accessories must be performed in a non hazardous location DANGER Toutes les op rations de maintenance relatives au d bitm tre et ses accessoires doivent tre ex cut es dans un environnement qui ne pr sente aucun danger 7 1 Maintaining the Battery Compartment Desiccant The desiccant material is a silica gel indicator When the gel is saturated with moisture the beads turn from blue to pink To rejuvenate the beads for reuse remove them from the assembly Heat the beads in an oven at 100 to 180 C 212 to 350 F until the beads turn blue again Discard and replace the beads if they do not turn blue after heating 7 1 1 Replacing the Battery Compartment Desiccant A small desiccant cartridge in the battery compartment Figure 17 on page 32 and Figure 18 on page 32 prevents moisture damage to the batteries and power circuitry Table 9 contains replacement part numbers If the normally blue desiccant beads turn pink replace the cartridge or remove the cartridge end cap and recharge or r
94. or operating this instrument Pay particular attention to all danger and caution statements Failure to do so could result in serious injury to the operator or damage to the equipment To ensure that the protection provided by this equipment is not impaired do not use install this equipment in any manner other than what is specified in this manual 2 1 1 Use of Hazard Information DANGER Indicates a potentially or imminently hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation that may result in minor or moderate injury Important Note Information that requires special emphasis Note Information that supplements points in the main text 2 1 2 Precautionary Labels Read all labels and tags attached to the instrument Personal injury or damage to the instrument could occur if not observed A symbol if noted on the instrument will be included with a danger or caution statement in the manual This symbol if noted on the instrument references the instruction manual for operation and or safety information zd Electrical equipment marked with this symbol may not be disposed off in European public disposal systems after 12 August of 2005 In conformity with European local and national regulations EU Directive 2002 96 EC European electrical equipment users must now return old or end of life equipment to the producer for disposal at no charg
95. otocol Converters In some situations there may not be a Modbus ASCII port available for use with the 940 Flow Meter A good example might be where there is a need to install a flow meter at a remote pump site that already has a single Modbus line connected to a PLC that is used to control the pumps Port expanders are available from third party manufacturers these allow several Modbus slave devices to be connected to a single Modbus Master device Typically a single port expander has 3 5 separate Modbus ports on it Depending on the manufacturer the user may be able to configure each of these ports for different communications parameters In essence not only does this type of port expander allow multiple slave devices to be connected to a single Modbus master device but it can also be configured to convert incompatible communications parameters such as Modbus ASCII to RTU or vice versa baud rate parity stop bits etc In addition to the port expanders mentioned above other protocol converters from third party manufacturers can be used to convert other industrial protocols to Modbus ASCII D 15 Other Reference Material SCADA ANSI Specification Std C37 1 1994 Boyer Stuart A SCADA supervisory control and data acquisition Research Triangle Park NC Instrument Society of America 1993 MODICON Modicon modbus protocol reference guide North Andover MA MODICON Inc Industrial Automation Systems 1996 AE
96. oz cor S313WMOH 14999 N d rud ao aanse aalviosroluo wog us lee ALIDOTIA wainawoo 1 IO Si EE von E N a 9047 30 wie X0 E 1401 8EL4 N d TV3 31NI E L Ald L SSV1O NOILV2O1 d3HISSv1O ShOQ3VZvH s 9 NI SI SNIOWI WAWINIW L NI Z L SI 313WVIO LINGNOD WAWINIW NI NOILVTIVLSNI WAQOW 4O4 9 1 u 1V Wer 195 60 1 9 1 VSI ISNV 81 NOILO3S 61200 38020 91419313 NVIOVNVO YOS 31Ol13 v OZ Wd4N ISNV 3009 1vOIl81O313 TVNOILYN 3HL FIONVOYODIY NI 38 LSNW SHOHI3W ONISIM Aaa YILIW UNI SONVIONGNI 21313W IUZ FONVIIOVAVI NOISIA33 aasn 38 AVW SINIYA 110V43q ONIMOTIOS JHL NMONDIND 33V 318 VO JHL JO SYILIWWAVd IVOIBLOITI JHL dl l Figure 8 Control Drawing 940 V5 23 Meter Installation 130 193HS 31795 SNIWwaqalvOs1ON OG 8 226 OVA 001 OV OGA Nu 661 WSPIA ISNY ONIONVARTOL OMI3WO39 LES MINI
97. pack or the lead acid pack Do not attempt to use the lead acid pack charger with the Lithium lon battery pack DANGER The use of chargers other than those provided by the manufacturer for use with these batteries is not recommended and may damage the battery or shorten battery life DANGER II est d conseill d utiliser des chargeurs autres que ceux fournis par le fabricant pour ces batteries car ils risquent de les endommager et de r duire leur vie utile Maintenance This battery pack requires no maintenance other than charging Charge Inspect the Lithium lon battery pack and the battery connection for damage before use or charging Do not attempt to use or repair a damaged battery pack assembly Batteries and Chargers Use only the charger provided for the Lithium lon pack 6678000 The pack can be recharged at any time regardless of charge level Total discharge will have a negative impact on the number of charge recharge cycles allowable and should be avoided The Lithium lon battery can be fully charged in 8 to 12 hours using the charger provided The charger will terminate the charge automatically and float charge the battery until it is removed from the charger The charge rate is 600 mA DC When the charger is plugged into a suitable AC voltage source the power LED will illuminate When the battery pack is connected the charge LED will illuminate yellow A flashing yellow charge LED indicates that the battery is deeply dischar
98. pproved seal to prevent migration of dangerous fumes or vapors from the hazardous location to the non hazardous location DANGER Acheminez le cable a travers un joint approuv afin d emp cher la migration de 35 Meter Installation fum es ou vapeurs dangereuses de l emplacement dangereux vers l emplacement non dangereux Follow the steps mentioned below to route the RS232 Serial Port 1 Attach the cable with the round connector from the Opto Isolated Interface to the connector on the 911 940 Flow Meter labelled RS232 2 Attach the cable with a rectangular connector to the appropriate serial COM port on the PC or laptop 4 5 Wiring the Sampler Interface on Model 940 DANGER All connections to the flow meter must be made in a non hazardous location DANGER Tous les raccordements au d bitm tre doivent tre effectu s dans un environnement qui ne pr sente aucun danger All sampler interface wiring must follow the installation drawings in section 4 1 on page 15 Refer to Table 7 and Figure 20 Table 7 Sampler Cable Connector Pin Assignments and Description 5 Wire Pin Letter Color Description Rating A White 12 V dc input 412 V dc B Provides the ground line that is used in conjunction with the other signals Blue Ground on this connector 8 dc Output Used in conjunction with Pin B ground to signal a sampler that a current is 100 mA Flow Pul
99. quired minimum distance of 50 mm 2 in between intrinsically safe and non intrinsically safe conductors The panel layout of these enclosures should be constructed such that the separation of intrinsically safe and non intrinsically safe conductors is maximized General Information 2 1 4 2 Intrinsically Safe Wiring Practices DANGER Intrinsically safe wiring must be separated from non intrinsically safe wiring to prevent the transferring of unsafe levels of energy to the hazardous area DANGER Le cablage a s curit intrins que doit s par du cablage a s curit non intrins que afin d emp cher tout transfert de niveaux d nergie non s rs vers la zone dangereuse The following practices are meant to be used as guidelines or recommendations only For specific rules or more detailed practiced refer to the National Electric Code Canadian Electric Code or ANSI ISA RP 12 6 1987 or subsequent Intrinsically safe wiring must be installed maintained and repaired with considerations for the following Connections Do not connect non intrinsically safe wiring to intrinsically safe terminations of any associated apparatus usually identified with light blue Routing Intrinsically safe wiring must enter or leave the non hazardous location by the shortest and most direct route Clearances A clearance distance of at least 50 mm 2 in must be maintained between any non intrinsically safe conductors and intrinsically safe w
100. r If the turbulence near the measurement point is excessive it may be difficult for the sensor to determine the average velocity of the stream The flow meters provide several unique features to help deal with these problem sites 3 1 3 Choosing the Appropriate Meter and Sensor Combination Use Table 4 to determine which sensor to use See Section 6 on page 43 for sensor installation instructions Table 4 Flow Meter and Sensor Configurations Flow Meter Model 911 Level and Velocity Sensor Configurations Meter plus one Submerged Area Velocity Sensor or one Velocity Only Sensor 940 Meter plus two Submerged Area Velocity Sensors or Meter plus one Submerged Area Velocity Sensor and one In Pipe Downlook Ultrasonic Sensor 13 Getting Started 14 Section 4 Meter Installation DANGER Only qualified personnel should conduct the tasks described in this section of the manual DANGER Seul un technicien qualifi peut effectuer les t ches d installation d crites dans cette section du manuel This section describes the ONLY approved installation instructions for the 911 and 940 Flow Meters This section also describes battery installation and interface wiring for a RS232 Modem and Sampler connection 4 1 Approved 911 and 940 Installation Drawings DANGER Any installation or flow meter configuration not specifically detailed on the following control drawings is not allowed In all cases the local author
101. r converts the level reading to a flow rate based on the user defined characteristics of the primary device 6 1 1 Installing the Downlook Ultrasonic Sensor Note Do not suspend the sensor by the cable Only use appropriate mounting hardware Site selection can greatly enhance system performance Several important factors should be considered when installing the downlook ultrasonic sensor at any primary device e Locate the ultrasonic sensor at the proper head measurement point for that primary device Determine the appropriate sensor height Suspend the ultrasonic sensor over the center of the flow stream where there is the least surface turbulence Mount sensor to a stable secure location isolated from vibration Invisible Range The 940 Flow Meter is equipped with an invisible range adjustable deadband feature to prevent false echoes from tops of channel walls ladder rungs shelves etc A user selected range is defined which is invisible to the flow meter Extend the invisible range to where it meets or overlaps the highest expected level in the channel Refer to Figure 22 on page 44 A gap of at least 5 cm 2 in should be left between the invisible range and the highest expected level The minimum distance must be at least 29 cm 11 in The 43 Sensor Installation sensor is blind to anything closer than the deadband and stops reading level when the distance is shorter than that
102. r for procedures related to confined space entry 11 General Information 12 Section 3 Getting Started 3 1 Installing the Flow Meter Considerations 3 1 1 Choosing the Proper Site The accuracy of flow measurement depends on the suitability of individual monitoring sites Select sites that have normalized flow and minimal turbulence Turbulence can make it difficult to detect an average velocity in the flow stream Obstructions vertical drops pipe bends and elbows can create turbulence Table 3 contains suggestions for preventing turbulence Table 3 Suggestions for Preventing Turbulence Site Condition Suggested Remedy Outfalls Attach the sensor at least ten times the maximum expected level upstream of the outfall Vertical drops in the channel floor Attach the sensor at least ten times the maximum expected level upstream of the vertical drop Attach the sensor at least ten times the maximum expected level downstream of the vertical drop Elbows sharp turns and Y connections Locate the sensor at least ten times the maximum expected level upstream of the obstruction Locate the sensor at least ten times the maximum expected level downstream of the obstruction 3 1 2 Dealing with Difficult Sites Some sites may be difficult to monitor due to poor site conditions The direction and speed of particles in the flow stream contribute to the signal received by the velocity senso
103. rasonic Sensor Installation 48 6 2 In Pipe Ultrasonic Sensor ses 49 6 2 1 Mounting the In Pipe Sensor 49 6 2 2 Angling the A bee ra 50 6 2 3 Calibrating the In Pipe Ultrasonic Sensor 50 6 2 4 Protecting the In Pipe Ultrasonic Sensor U eee 51 6 2 5 Troubleshooting the In Pipe Sensor ied eet Ee 52 6 3 Installing the Submerged Area Velocity Sensor U een 52 6 3 1 Zeroing the Submerged Area Velocity Sensor i 52 6 3 2 Important Installation Guidelines for Submerged Area Velocity Sensor 52 6 3 3 Connecting the Submerged Area Velocity Sensor to the Mounting Bands 53 6 3 4 Placing the Submerged Area Velocity Sensor and the Mounting Band into the Pipe 54 Section 7 Maintenant rn cio rr ded qub pue oet ah mo e od mue emule dpt tes E 57 7 1 Maintaining the Battery Compartment Desiccant 57 Table of Contents 7 1 1 Replacing the Battery Compartment Desiccant 57 7 2 Maintaining the O Ring Gasket on the End 57 7 3 Cleaning the Flow Meters onto C aeta etae reo 58 7 4 Storing the Flow Meters lilla een 58 Gleaning th Connectors C 58 7 6 Maintaini
104. re not equal an error condition occurs The LRC is calculated by adding together successive 8 bit bytes of the message discarding any carries and then complementing the result The LRC is calculated by summing all values in the ASCII message except for the leading colon and ending lt CR gt lt LF gt D 7 Communication Parameters To successfully communicate with the 940 Flow Meter using Modbus ASCII the communication parameters of the master device must be set at 7 bits Even Parity and 1 Stop bit The baud rate may be configured to any value offered by the 940 Flow Meter With the exception of baud rate the communication parameters must not vary from this format D 8 User Memory Customizing 92 The most familiar component of existing SCADA networks today is the Programmable Logic Controller PLC Because the network integrator is most familiar with this type of device the flow meter emulation of an existing PLC simplifies the process of integrating the manufacture s instrumentation into the SCADA network Modbus ASCII uses a referencing system to identify the various types of memory inputs and outputs Each reference number has a leading digit that identifies its data type discrete input discrete output register input register output followed by a string of digits that indicates its location in RAM Table 13 SCADA Modbus System Guidelines Table 13 Modbus ASCII Memory Input Output Referencing System
105. ries should last for more than 1 000 downloads based on an average download time of 5 minutes The batteries need to be changed once a year due to the limited shelf life of any type of battery 1 Remove the cover from the RS232 interface Figure 32 2 Remove the old batteries Install fresh batteries into the RS232 interface making certain the polarity is correct Figure 32 Replacing RS232 Batteries 7 8 Maintaining the Submerged Area Velocity Sensor 7 8 1 Cleaning the Transducer Port Clean the transducer port when e Adrift in the readings is observed Level data are missing or incorrect but velocity data are valid Excessive silt has deposited between the transducer and its protective cover 59 Maintenance 7 8 2 Cleaning the Submerged Area Velocity Sensor Oil filled and Non oil Important Note DO NOT interchange an oil filled protective cover plate with a non oil cover plate This adversely affects level readings It is possible to convert one type of sensor to the other using the Oil Probe Conversion Kit Cat No 7730000 refer to the Oil Probe Conversion Kit Instruction Sheet Cat No 7730089 for more information Important Note When cleaning the transducer use the most gentle technique possible Do not use sharp or pointed object to remove sediment from the face of the transducer If the transducer is nicked or dented it breaks 1 Soak the sensor in soapy water Note Do not soak the sensor in bleach Bleac
106. roducts in hazardous locations to determine the acceptability of the product for the environment Additionally to ensure safety the installation of instrumentation in hazardous locations must be as per the manufacturer s control drawing specifications Any modification to the instrumentation or the installation is not recommended and may result in life threatening injury and or damage to facilities DANGER Bien que certains produits Sigma soient con us et certifi s pour tre install s dans des endroits dangereux tels que d finis par le National Electric Code de nombreux produits Sigma ne conviennent pas pour de tels endroits Il rel ve de la responsabilit des personnes qui placent les produits dans des endroits dangereux de d terminer s ils sont adapt s cet environnement En outre des fins de s curit le placement de machines dans des endroits dangereux doit s effectuer dans le respect des consignes des sch mas de contr le du fabricant Toute modification apport e aux machines ou tout d placement de celles ci est d conseill car susceptible de provoquer des accidents mat riels et ou corporels 2 1 4 Intrinsically Safe Equipment The 911 and 940 Flow Meters are listed as Intrisically Safe for Class 1 Div 1 Groups C and D Hazardous Locations This means that the circuits within these flow meters are designed to be incapable of producing a spark or thermal effect that could ignite a mixture of flammable or combustible
107. s is embedded in the first two characters of the Modbus message The flow meter only responds to messages encoded with the same address as the meter If the meter receives a valid Modbus message with an encoded device address other than the address the meter is configured for it ignores that message Response Check the Modbus mode There are two different forms of Modbus ASCII and RTU Currently the 940 Flow Meter only support Modbus ASCII Consequently the device communicating with the meter must be set up for Modbus ASCII The meter will not respond to Modbus RTU messages Problem The data values being returned by polling the meter with Modbus are not the same as the data values displayed in the current status screen of the meter Response Confirm that the correct register addresses are being polled Check to make sure the register address being polled corresponds to the correct data channel For example if polling for FLOW make sure the server or MMI is requesting data from registers 40033 40034 If polling for several values at the same time try changing the polling so that only one value is polled at a time Then check to see if the polled value matches a different data channel in the meter For example if polling for Level and it appears that the data for Velocity is displayed instead then probably the wrong registers are being polled Response Check the data format of the Modbus server When configuring a Modbus server or MM
108. s the bottom of the sensor housing The in pipe sensor is not recommended for weir or flume applications due to limited range but may be desirable in some applications 7777 Z UE WARS Figure 26 Side View of In Pipe Pipe Ceiling 5 Internal Deadband 18 3 cm 7 2 inches 2 Distance from Sensor Range 0 2 in to 5 ft 6 Pipe Floor 3 45 Deflector 7 Minimum distance to reflecting obstruction 46 cm 18 in 4 Ultrasonic Sensor 8 Reflecting Obstruction 6 2 1 Mounting the In Pipe Sensor Mount the sensor over the center of the flow stream where the surface turbulence is minimized Figure 27 on page 50 Mount the sensor 46 cm 18 in away from obstructions located in front of the in pipe sensor to prevent inaccurate liquid level readings Figure 26 Level the sensor using the built in bubble level Ensure the isolation gasket is in place and the mounting bracket thumbscrews are finger tight to avoid sensor ringing Install the sensor within 1 5 m 5 ft of the lowest expected level the maximum range of the sensor 49 Sensor Installation Figure 27 End View of In Pipe Sensor 5 Wastewater Bracket Thumbscrew Vibration Isolation Gasket Bubble Level Mounting Clip O Sound Waves size vary 6 2 2 Angling the Beam The narrow beam of sound
109. se Yellow pre determined amount of flow has accumulated dc max with a Output duration of 500 ms Used to wake up a wastewater sampler when a level and or rainfall set point condition is met so that it can begin sampling Used in conjunction with Pin B Sampler Black N S 24 V dc Start ground this line is normally allowed to float and is switched to ground by transistor once the set point conditions are met E Confirms that a sample has been collected The time and date of each water 12 V dc max Red sample appears on the data printout when downloaded using a Data Transfer minimum 3 second Event Input Unit or Sigma Support Software pulse Used in conjunction with the Event Input signal described above It tells the flow meter which bottle was used and when a sample was taken This information appears in the data printout see Sample Times and Dates when downloaded using a Data Transfer Unit or Support Software Bottle Number signal description F If the Program Complete Output Pin F of the auxiliary connector is disabled on Bottle the sampler then it is used to transmit the bottle number to the connected Green Number device Input Time A 200 ms Time B 100 ms 50 ms HI 50 ms LO If a sample attempt fails the first pulse width B is 150 ms HI and 50 ms LO If Sample Distribution is programmed for multiple bottles per sample mode only the first bottle number of the set is transmitted
110. t No 6820 4 inch x 0 25 Hex Nuts Cat 1429 46 e Sensor Installation Figure 25 Adjustable Mounting Bracket Cat No 2904 1 14 75 inches Cat 3047 4 Sensor Mounting Clamp 2 15 25 inches Cat No 3046 5 14cm 5 5 in tall Cat No 3108 3 16 625 inches 2 Cat No 3048 6 Horizontal and vertical sections are fully adjustable 1 Sensor Mounting Clamp with built in bubble level Sensor adjusts to any required level Loosen the bolt slide the section to the desired distance and re tighten the bolt 47 Sensor Installation 6 1 2 Troubleshooting the Downlook Ultrasonic Sensor Installation Problem Error Message Solutions Ultrasonic Failure No signal from sensor Check the connection between the flow meter and the sensor Check the sensor cable for cuts or nicks Recalibrate the sensor Look for unusual temperatures or the inability for a new calibrated level to be read Try a different sensor on the same flow meter to rule out instrument problems and try a different flow meter with the same sensor to rule out sensor problems Echo Loss Flow meter does not get a return signal from the sensor Check for excessive foam on the water surface Foam may cause sound waves to be absorbed rather than reflected Check the sensor height See Figure 22 on page 44 Check the sensor cable for cuts or nicks
111. teristics of lead acid batteries at various ambient temperatures Table 12 shows recommended storage times for lead acid batteries 87 Batteries and Chargers Gel Cell Self Discharge Characteristics 100 7 T gt lon nn 80 5 QC S 60 P 10 C e 20 C E 40 Se 40 20 0 0 3 6 9 12 15 18 Storage Time months Figure 51 Battery Discharge Characteristics Table 12 Lead Acid Battery Storage Recommendations Storage Temperature Maximum Recommended Storage Time 0 to 20 C 12 months 21 to 30 C 9 months 31 to 40 C 5 months 41 to 50 C 2 5 months C 2 Rechargeable Lithium lon Battery for 940 Flow Meter 88 A Lithium lon rechargeable battery pack 6608500 is available for the 940 Flow Meter only This is an alternative to the lead acid and primary metallic Lithium non rechargeable battery offered as an option for the 940 Flow Meter The Lithium lon rechargeable battery pack is designed to allow up to 500 charge discharge cycles and is shipped with a charger designed specifically for this battery pack The Lithium lon charger has specific plug wiring to prevent use with the primary non rechargeable metallic Lithium pack or the lead acid pack Do not attempt to use the Lithium lon battery pack charger with the primary non rechargeable metallic Lithium
112. uce the likelihood of debris collecting on the cable and the mounting band The cable should exit the tied area at or near the top of the pipe to keep it out of the flow stream Note If there is a large amount of silt at the bottom of the pipe rotate the band until the sensor is out of the silt Figure 30 on page 54 assuring that the sensor remains below the minimum expected water level at all times The silt should not be disturbed and must be measured frequently 53 Sensor Installation Figure 29 Attaching the Sensor to the Mounting Band 1 Nylon Wire Ties 3 Sensor 2 Screws 2 4 Mounting band ra ap Figure 30 Avoiding Silt when Mounting the Sensor 1 Pipe 2 Sensor 3 Silt 4 Water 6 3 4 Placing the Submerged Area Velocity Sensor and the Mounting Band into the Pipe Point the angle face of the sensor into the flow The manufacturer recommends placing the sensor with the arrow pointing at the flow Figure 31 on page 55 For other mounting configurations see the appropriate flow meter manual Slide the mounting band as far as possible into the pipe to eliminate drawdown effects near the end of the pipe Locate the sensor at the bottom most point in the channel If excessive silt is present on the bottom of the pipe rotate the band in the pipe until the sensor is out of the silt 54 Sensor Installation Velocity Sensor Normal Upstream Position Velocity Sens
113. uently in surcharge conditions use a submerged level sensor instead of an in pipe ultrasonic sensor 6 3 Installing the Submerged Area Velocity Sensor Read the instructions carefully before installing the sensor Failure to do so could result in serious injury to the operator or damage to the equipment 6 3 1 Zeroing the Submerged Area Velocity Sensor The sensor has been factory calibrated and compensated for temperature The sensor needs to be zeroed during each installation but does not require calibration The sensor should be zeroed when moving it from one flow meter or sample to another 6 3 2 Important Installation Guidelines for Submerged Area Velocity Sensor 52 Do not install more than one sensor at a time in pipes less than 61 cm 24 inches Multiple sensors in smaller pipes can create turbulent or accelerated flows near the sensors that may cause inaccurate measurements Mount the sensor as close as possible to the bottom of the pipe invert to accurately measure low velocity levels Do not monitor flows in the invert of the manhole itself The best sensor location is 3 to 5 times the sewer diameter height upstream of the invert Locate monitoring sites as far as possible from inflow junctions to avoid interference caused by combined flows Avoid sites that contain flow obstacles within 2 to 4 pipe diameters in front of the sensor installation rocks stones pipe joints valve stems etc as these contribute to turbule
114. ulate a Modicon Compact 984 PLC Consequently we follow the exact same format that Modicon uses for the storing and processing floating point numbers Additionally the Modbus protocol does not define how floating point values are packed stored into the internal memory addresses or Registers of the flow meter When integrating the Modbus capable flow meters be aware that these meters store and process floating point numbers in the exact same format as the Modicon Compact 984 PLC All current models of Modicon PLCs including the Compact 984 pack two bytes of data into each register This alone presents no problems Unsigned two byte 16 bit integer values in the range of 0 to 65535 can be stored and retrieved from these registers without any problems or complications The complications arise when the stored value is a floating point value which by IEEE definition require 4 bytes 32 bits The IEEE standard for floating point values states in part that the 8 most significant bits represent the exponent and the remaining 23 bits plus one assumed bit represent the mantissa and the sign of the value Since a data word consists of two bytes a floating point value is represented by two data words Because a single Modicon register consists of one word or 2 bytes two consecutive Modicon registers are needed to store one floating point value The representation of a floating point value can be broken down into a High Order a
115. xact replacement battery packs purchased directly from the factory or a factory authorized outlet Any unauthorized battery substitution will void the intrinsically safe design and approval of the unit and could result in fire or explosion DANGER Utilisez exclusivement des batteries de rechange identiques que vous achetez directement de l usine ou d un point de vente agr par celle ci Tout remplacement non autoris d une batterie annule la conception s curit intrins que et l agr ation de l appareil et peut provoquer un incendie ou une explosion DANGER Never install remove or charge batteries in a hazardous location DANGER Vous ne devez jamais installer retirer ou recharger les batteries dans un environnement dangereux To recharge the 911 Lithium lon Battery Pack 5160 01 1 Move the 911 Flow Meter to a non hazardous location 2 Remove the battery pack from the 911 Flow Meter as described in section 4 3 2 on page 31 3 Inspectthe battery pack and the battery connection for any damage Do not attempt to use or repair a damaged battery pack assembly 4 Plugthe charger 913 into a standard 120 volt wall outlet Connect the charger to the battery pack using the battery charger and battery pack cables A completely discharged battery pack will charge in approximately 8 to 12 hours Do not overcharge 6 Install the battery pack in the 911 Flow Meter as described in section 4 3 2 on page 31 4 4 W
116. y is fully charged when the LED indicator turns off Temperature At higher temperatures the electrical capacity that can be taken out of a battery increases Atlower temperatures the electrical capacity that can be taken out of a battery decreases However excessive heat ruins batteries Avoid placing batteries near heat sources of any kind To maximize battery life operate the battery at an ambient temperature of 20 C 70 F The permissible operating temperature range is 15 to 50 C 5 to 120 F however use in the 5 to 35 C 47 to 95 F temperature range is recommended Disposal e 911Flow Meter The battery pack assembly for the 911 Flow Meters are rechargeable disposable Follow local applicable disposal guidelines for gel electrolyte type batteries The entire battery housing is meant to be disposed of after the service life of the battery Do not attempt to open the case to gain access to the batteries there are no user serviceable parts inside Storage Store lead acid batteries in a cool dry place Their low self discharge rate and excellent charging characteristics permit storage for up to one year without loss of efficiency or appreciable deterioration of battery performance At room temperature the self discharge rate of lead acid batteries is approximately 3 of rated capacity per month The self discharge rate varies as a function of ambient storage temperature Figure 51 shows the storage self discharge charac

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