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Manual - Can-Am Instruments Ltd.

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2. ELEVATION Submerged Flow Free Flow Figure 44 Parshall Flume 79 Working with Primary Devices Submerged Probe Preferred Head Measurement Point View Upper Transition Throat Lower Transition Preferred Head Measurement Point Water Surface Small jump should occur here Elevation View D Downstream Depth Conduit Diameter Upstream Depth 2 Figure 45 Palmer Bowlus Flume with Integral Approach 80 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 SN NE Elevation View CZ LY Conduit Diameter Downstream Depth 2 Upstream Depth Figure 46 Leopold Lagco Flume 81 Working with Primary Devices Top View Inlet Bulkhead Head Measurement Section Elevation View Approach Section Pipe Stub Figure 47 H Flume Top View EN SAN ASG MMA ASS SSS S amp S sV Elevation View Figure 48 Round Pipes 82 in
3. 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 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 E 10 Query The Modbus ASCII query must take the form shown below that specifies the starting register and number of registers to be read Start Start Start Slave Function Address of Pts No of LRC lt CR gt lt LF gt Address 03 High Pts Low High Low 97 SCADA Modbus System Guidelines 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 Fi 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 E 11 Response The master queries the flow meter using a Read Holding Registers request which implies 4XXXX register reference to slave device address 01 The message requests data from holding registers 40007 40008 to obtain the
4. 54 6 3 1 Zeroing the Submerged Area Velocity Sensor 54 6 3 2 Important Installation Guidelines for Submerged Area Velocity Sensor 54 6 3 3 Connecting the Submerged Area Velocity Sensor to the Mounting Bands 55 Table of Contents 6 3 4 Placing the Submerged Area Velocity Sensor and the Mounting Band into the Pipe 56 6 4 Velocity Only Sensor e 57 6 4 1 Connecting the Velocity Only Sensor essen 58 6 4 2 Installing the Velocity Only Sensor eee nennen nnns 58 6 4 3 Calibrating the Velocity Only Sensor enitn nnns 58 Section 7 Maintenance etse bete leere ta iu botte eet eet nio ae 59 7 1 Maintaining the Battery Compartment Desiccant 59 7 1 1 Replacing the Battery Compartment Desiccant 59 7 2 Maintaining the O Ring Gasket on the End Cap sse 59 7 3 Cleaning the Flow Meters oot E De rct Pod a eve nie lU 60 TA otoeting iie EloW MILBIS cate oe prre eie FREE ntes Aang 60 1 5 Cleaning the Connectors ue de ox ene c
5. 73 Section 10 Contact Information for Europe 74 section 11 Warranty xu nee RS ee 75 Appendix A Working with Primary Devices e tte teeteee eee 77 Appendix B Engineering Drawings sssseee eene 83 Appendix C Channel Installation Options 85 Appendix D Batteries and Chargers 91 Appendix E SCADA Modbus System Guidelines 93 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 11 4 cm dia x 57 L 4 5 in x 21 5 in with 3 2 amp battery Dimensions 16 5 cm dia x 57 L 6 5 in x 22 5 in with 12 amp battery 4 2 kg 9 2 Ib with 3 2 amp hour battery pack 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 3 2 amp hour battery pack 12 amp hour battery pack Battery Life User Interface 65 days
6. 001 9088 001 9088 001 7088 001 9088 __ 6 06 34 007 A ON 375 S 920 9088 520 69088 620 72088 520 79098 wezzrisz ONONYENOL SNIMVIG SIHL 090 9088 00 89088 090 7088 00 79088 we si 14 09 OVA OZI 0 6 ELS OL 4 020 52088 020 59089 020 72089 020 79088 Wl 6 14 0 STF SONY TOaLNOD ONIMY3O xui G3allfio3 WAOwdav T HOLO TORO 1010 6097 6508 O2 ONY BAOT avg d NONE 80 uno avans avans avans avans NC H XIJANN 0095 C oos kavana SSHONI NI 33v SNOISNIWIG IO 4 IO ANVdIWOO HOVH ava ww G3HO3ds 3SIMSBHIO SSTINR JNVdWOO HOVH WO 181 NOISSIWadd 1O33IQ 3NOANY OL 035010514 YO NO333H NMOHS LON XO SI3HI3HM FYNLOVANVW OL Q3Sf 38 LYVd NI YO JIOHM NI LON AVW AINO NOILVW3OJNI ONISIS3NION 3ON3QHNOO NI 491581 SI 11 DNIM V3IG SIHL NO G3SO1DSIC NOILVW3OHNI 3H1 NI SLHOIa Aalv13ldO3ldd SWIV1O ANVdWOO HOVH 3OILON 0 vEZV 60 2627 20 2627 0 0 14001 0 80 2627 20 2627 Z0 4 2v 61 1408 LOVELY 20 2627 10 2627 LO ZELY wig Z L4SZ us EU cA uo s AWO 030 0 Av ans 01301 Av ans 1301 0 ans 7 EH GSONVHN3 1 anova d18vL SGA ZL Y S19 N d Y ps
7. 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 33 on page 57 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 56 Sensor Installation Manhole Velocity Sensor Normal Upstream Position 4 FLOW Velocity Sensor Downstream Position 4 FLOW Figure 33 Placing the Sensor into the Flow 6 4 Velocity Only Sensor The Velocity Only Wafer Sensor Figure 34 on page 58 is an extremely low profile velocity sensor It does not measure level The streamlined shape of the velocity only sensor allows velocity measurement in very low flow conditions When used in conjunction with a level sensor the meter can calculate flow Refer to section 6 4 1 on page 58 57 Sensor Installation lt FLOW HEEEEB Figure 34 Velocity Only Wafer Sensor Velocity Measurement Sound Waves 1 Sensor 2 6 4 1 Connecting the Velocity Only Sensor Velocity receptacle
8. Y yarava 23MOd YawOlsnd SI gt Y LESS N d E NIMM 107001 N d wadow y Ig 155 9 N d eae ia Raney L 39048 4 3 Lees 9880 1 318V1 43a YOOL N d Addis YIMOd M TV3IO3INI 0001 Y ASA vWOIS OL 0017925 N d woz gt 7410 989 0007909 N d NO 14061 1 MOT __ HLONST XV Or6 HQOW ZEZS N d xvw EROR uma 38038 ons So H es C N 4301 IO Nid hes 1 319 1 338 CL Loser NT IA NI 2181 x34 TV3O3INI oaase L AIQ L SSv1O NOIIVOO1 NOILVOO 1 3lsISSV1O SNOGYVZVH WO ZENI SISNIGVY GNI WAWINIW 55710 SnhOQ3VZVHNON WO L NI Z L SI YSLSWVIG LINGNOD WAWINIW LINGNOD NI NOILVTIVLSNI WAGOW SEES waa CaaS J FZL dad VSI ISNV ANY 81 NOILO3S 6 L ZZD 3802 OI819313 NVIGVNVD YOS JIOILNY OZ VWd4N ISNV 1v2I312313 TVNOILVN JHL JONVGYODOV NI 38 LSNW SGOHISW ONISIM NOILdINOS3A ASIW UN JONVLIONGNI 3313W IU 2 JONVIIOVd VO NOISIA33 qasn 38 AVW SINIYA Ln v43d 9NIMOTIOJ 3HL NMONDIND JAY 3797 FHL JO SXJLIWY XY d 1v21I3103 3 dl Figure 9 Control Drawing 940 8 26 Meter Installation
9. 32 Meter Installation 4 2 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 16 and Figure 17 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 16 911 Case Battery End with Inserted Desiccant 1 Desiccant Figure 17 940 Case Battery End with Inserted Desiccant 1 Desiccant 4 2 4 Estimating the Battery Life When using the battery pack battery life is based on e Number of sensors installed more sensors decrease battery life e Recording intervals longer intervals increase battery life e Temperature colder temperatures decrease battery life e Site hydraulics second order effect caused by excessive turbulence e nterval between downloads 33 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 Single use lithium battery Typically 365 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 cha
10. 0095 ANVdWOO HOVH AV qns AV ans AV qns AV qns pyepueis IIO IIO 4 3 0385 3SIM2BHIO SSFINN OVBBIVN ANVdWOO WOR NOISSIW233d 193X10 1 OL GASOTOSIC YO Q32nQ03d33 NO333H NMOHS LON BHI3HM ONIHIANV AYNLOVANVW OL 351 38 Is vd NI YO 31OHM NI LON AWW NOILVW3OJNI ONISSINIONS 32N3QHNOO NI 9311551 SI LI ONIMVA SIHL NO 035010510 NOILVW3O3NI SHI NI SLHDIY A3VI3ldO3d SWIVIO ANVdWOO HOVH 39ILON 0 VEZV 60 64 0 26L7 0 9 06 1 4001 ZO VELY 30 2627 20 2627 Z0 2V UZ GL LJ0G HIONTI LO vELY 20 262 10 262 10 2 2 9 211 392 130 0 ans 1401 0 v ans 1401 0 v ans YaWOLsnd 5 av 2 W3QOW Od 1 9 Od erry N d L XVW 14 001 SO cc XVW H OOI 1727 AdOdd HTIEX 28952 1727 N d Efe SO EEZS N d DE Saws N d 1401 14 061 JOVAYALNI QG31v1OSl OLdO 0001 EC SN VWOIS OL gt 001 7925 N d woz gt J0 3313WMOH 14969 oozrszs N a Or6 I30OW Or8y N d 5 NO 1308
11. 40 4 6 1 Connecting the Sampler Cable to a 940 Flow Meter 41 4 6 2 Logging a Non Sigma Sampler to 940 Flow Meter 41 Section 5 Software and Communications 20 0 0 43 5 1 Required Software ennt nnne nist nent n nnn nent nenne nene nenne nennen 43 5 2 Programming and Analysis Options erc oet de dace peg a eut rg re 43 Section 6 Sensor InstallatiOnh onte PH Rene ERE ed ERE Lec eee ede bor Ote ace nce pe EE ERR Geet 45 6 1 Downlgok Ultrasonic Sensor tac tero qo arena t Ad gon 45 6 1 1 Installing the Downlook Ultrasonic Sensor 45 6 1 2 Troubleshooting the Downlook Ultrasonic Sensor Installation 50 6 2 In Pipe Ultrasonic Sensor nnne nnn nennen nenne 51 6 2 1 Mounting the In Pipe Sensor i deo Sisto ee RR ne RR DR 51 06 2 2 Angling the Beam net Ero ER Reo ole ee a ME ges epi 52 6 2 3 Calibrating the In Pipe Ultrasonic Sensor e 52 6 2 4 Protecting the In Pipe Ultrasonic Sensor 53 6 2 5 Troubleshooting the In Pipe Sensor Literie eni stone 54 6 3 Installing the Submerged Area Velocity Sensor
12. G31vV1OSI O1ldO AT8W3SSV Em iem AEN YWOIS OL 0017525 N d Sa Woz gt J0 14959 0027925 N d 14 051 8313A sane d ao MONET 0 6 1300W 3OVJ3I3INI E N d GalV1OSFO1dO WOO NEL AlI2O HA VIJAY YALNdWOD OL cons ED NO m NO I318V1 433 14 0L 8 Zr N d AI8W3SSV INJA NI gll DI 33 V3 O3INI ogee d L SS v IO NOILV OO Q3HISSV 1 NOdsVZVH NOILY2O1 Snc RS WIE SHO GalsISSV1D ShOQ3VZVHNON S0 5 LE A N3d GASIARY 5 9 C VSI ISNY ANY 81 NOILO3S 6 1 260 OI319313 NVIQVNYO YOS 31OlL8 V OZ Vd4N ISNY 1V2I319313 TVNOILVN SHL 3O2NV 3O2OOV NI 38 LSNW ONIMIM 33 a3I3W Un 1 JONVLONGNI 2313W IU JONVIIOVdavVO NOISIA33 Q3sn 38 AVW SINIYA Ln v43d ONIMOT1O4 3HL NMONCINI JAY 318v 3H1 dO Sala 13W Val vd Tv Ola LO3 T3 dl L l v r 5 9 j 8 Figure 13 Control Drawing 940 V15 30 4 2 Installing the Batteries Meter Installation 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 2 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 env
13. e Storm water trigger based on level useful for EPA NPDES permitting program e Sample history logging Figure 23 Sampler Communications Use appropriate approved seal to minimize passage of 4 Power gases or vapors from hazardous location to non hazardous location 2 Optically Isolated Sampler Interface Cat No 4274 ina 5 940 Flow Meter in a hazardous location non hazardous location 3 Sampler located in a non hazardous location 40 Meter Installation 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 Logging 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 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 bitmetre et peut provoquer un incendie ou une explosion Reportez vous aux sch mas de contr le de l installation The Opti
14. 0 AV Ns 1301 0 AV ans 1301 0 825 15 HLONAI 31971 0 RN C100 ON32ZHSZ N d 0 3gdO3d OA SC AIIDOHA V3av H LEX O47 NO 1 aga AT8W3SSV INJA 3NITNI 1 gi o x3 Q 2 1 AIG 1 SSv1O 512 SNOGYVZVH WO L NI Z L SI S313WVIG LINGNOD WAWINIW LINGNOSD N 9TZL d VSI ISNV 81 NOILO3S 6 1229 AOD OI319313 NVIGVNVD JIOILAY OZ VddN ISNY 1VOl3LO3T3 TVNOILLVN 3HL 3ONVQ3O2OY NI 38 ISAW SQOHI3W 8313W Uh JONVLONANI i313W IUZ 3ONVIIOVdVO UO 9 Z N SI SIC V i ANIG WAOWINIW NOILVTIVLSNI WAGOW J04 ASN 38 AVW SINIYA L1 V33d ONIMOTIO4 3HL NMONXANN JAY 2 JHL 4O Selal3Wvslvd TvOlaLO313 JHL dl Figure 5 Control Drawing 940 2 22 Meter Installation P N 4840 940 REVISION REV DESCRIPTION APPROVED E REVISED PER R 3146 05 l CONNECTION OF P N 4080 FLASH CONVERTER TO 940 FLOW METER MUST BE MADE IN A NON HAZARDOUS LOCATION NON HAZARDOUS CLASSIFIED LOCATION 10 FT 10 FT 3 1m 3 1m 4080 Sr FLASH CONVERTER 3 a FLOW METER P lt lt NOTICE HACH COMPANY CLAIMS PROPRIETARY RIGHTS IN THE INFORMATION DISCLOSED ON THE DRAWING IT I
15. D Catalog Number 4979 911 940 Intrinsically Safe Flow Meters USER MANUAL March 2006 Edition 6 Hach Company 2005 2006 All rights reserved Printed in the U S A sn pks kct te Visit us at www hach com Table of Contents Section 1 Specifications wks Seen nla Debe Yoda e 5 Section 2 General Information e er enero 9 2 1 Safety tal eel si odo sooo gau as eas 9 2 1 1 Use of Hazard Information eie bert tpe tert ARM Qu eu bk pa iiie 9 2 1 2 lo put sepu Manca toe Aa adeo 9 2 1 3 Hazardous Locations ce Rees 10 2 1 4 Intrinsically Safe Equipment 10 2o Confined SpacS EMY 2 12 2 51 lt 6 ec d RIS YR RENE 13 2 1 7 Equipment Attachment Limitations 14 Section 3 Getting Started oon ERI a wie satu Dou ed cu ee 15 3 1 Installing the Flow Meter Considerations 15 2 11 Choosing this Proper Site uso ter A TAREA ANEA a Eada 15 3 1 2 Dealing with Difficult Sites ces tii sages tote p
16. 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 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 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 3 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 circumstan
17. 60 Modem Batteries 38 Modem Communications 37 Modem Fiber Optic Cable 36 Modem Installation 35 Modem Receptacle 36 Multiple Source Monitoring at a Single Site 87 Optically Isolated Interface 43 O RING tette teretes 59 O rings Replacement 60 c 15 Aus tere Monae se 43 Precautionary Labels 9 Programming and Analysis 43 Protecting the Sensor 47 R s it Ese oe tette c 60 RS232 Batteries 61 RS232 Interface 2 61 65232 Interface Wiring 34 RS232 Serial Port 34 5 Safety Precautions 9 Sampler Connector Pin Assignments 39 Sampler Interface Wiring 39 Sampler Receptacle 40 SCADA MOdbUS eee 93 Seals neca nae 12 59 Sensor Configurations 15 Sensor Installation 45 Sewer System Management
18. 90 79088 __ 6 22 14 SZ ONONVASTOL 050 5 088 050 69088 050 v2088 090 79088 0S VALN Or pononvio 0 0 5 088 0 0 S9088 0 0 v 088 020 79088 UtL 6 14 0E JOMINOO ONIMVAC sees SO GAYINDIY 1vAO3ddv 3ulL NOlLO3FO3ld 1 Boos 06 0 oro 090 Ioro Bus 66908 OD GNV1SA01 uec m AV ans AV ans ans ans 009S SHON SNOBNAWIC pyepuejs prepueis palato Palla ilo ANVdINOO HOVH Q3H 034 ISIMYSHLO 531 ANVdWOO HOVH WO 3191 NOISSIWYAd 1O38IO LAOHLIM 3NOANY OL 035010514 YO NOIYIH NMOHS LON NO ONIHLANV OL 38 LYVd NI XO JIOHM NI LON AVW NOILVWYOSNI ONISG3NION3 30 JONSCISNOO NI GANSSI SI LI ONIMWY SIHL NO GaSO1OSIG NOILVW3OJNI JHL NI SLHDIS ASWLAIdONd SWIVTO ANVdWOO 60 2627 20 2627 60 261 UIS 06 1400 ZO vEZV 80 2627 20 2627 20 2627 2 91 1 408 LO VEZV 20 2627 10 2627 L0 4 ZV 9 148 ATO _ 140 0 Av ans 1401 0 Av ans 1401 0 v ans G3ONVHN3 5 HLON31 4 HION31 YSWOLSND H ae O37 2 5 N d W3GOW I iaon evry N d Od N d 14 061 3OV3elalNI QG31v1OSI OLdO 0001 Xx ZEC SA VWOIS OL I 0017929 N
19. 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 E 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 emulate 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
20. 087 x distance from sensor Refer to Figure 25 and Table 8 on page 47 dams 1 1 1 1 1 1 1 1 4 1 Distance from Transducer 46 2 Beam Width Sensor Installation Table 8 Beam Angle Spread by Distance Distance from Target in 75 KHz Beam Width in w Horn 11 27 9 cm 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 3 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 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 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 26 on page 48 Several brackets are available for mounting the sensor to a fixed location such as a wall or floor See Figure 26
21. 1353 1370 9706100 9706200 9706300 9706400 9706500 9706600 9706700 9706800 9706900 3766 4021 4022 4023 4024 9706100 9706200 9706300 9706400 Replacement Parts and Accessories 8 3 Sensor Mounting Rings and Bands continued Description Part Number 24 inches 9706500 30 inches 9706600 33 inches 9706700 36 inches 9706800 42 inches 9706900 15 42 inches 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 8 5 Mounting Plate Hardware for Directly Mounting to Pipe Wall Sensor Type Part Number Submerged Pressure 4939 Velocity 3305 In Pipe 3875 71 Visit us at www hach com Section 9 Contact Information for U S A U S A Customers By Telephone 6 30 a m to 5 00 p m MST Monday through Friday 800 635 4567 By Fax 970 461 3915 By Mail Hach Company P O Box 389 Loveland Colorado 80539 0389 U S A Ordering information by e mail orders hach com Information Required Hach account number if available e Billing address e Your name and phone number e Shipping address e Purchase order number Catalog number e Brief description or model number e Quantity Ordering Information for Outside the U S A and Europe Hach maintains a worldwide network of de
22. 17 Refer to Table 6 and Figure 19 for Modem Receptacle Pins Figure 19 Modem Receptacle Pins Table 6 Modem Pin Assignments Pin Designation Color Description A Tip Green Ground B Ring Red Signal 4 4 1 Routing the Fiber Optic Cable Note The minimum allowable bend radius for the fiber optic cable is 8 cm 3 in Use the fiber optic cable ONLY if the cable needs to be disconnected and run through conduit The fiber optic cable is permanently connected to the fiber optic interface the fiber optic interface is the end that connects the flow meter The fiber optic interface is approximately 3 17 cm 1 25 in in diameter It is recommended to use a conduit of sufficient size to allow the 3 17 cm 1 25 in fiber optic modem interface to be pulled through the conduit without having to disconnect the fiber optic cable from the modem This allows the user to disconnect the fiber optic cable from the modem while following the instructions below 1 Move the modem to a clean dry location Remove the modem cover and position the modem 2 Loosen the black plastic compression nut securing the fiber optic cable to the modem housing completely and slide the nut down the cable 3 Pull the gray colored rubber bushing carefully out of the compression connector using a small pair of needle nose pliers and slide the bushing down the cable 4 Remove all four of the 9 volt modem batteries 36 Meter Installa
23. 1VAOSddv ALIOOTAA AONIOV AYOLVINOSY LOCH N d 6 S N d 10 LCCv N d SEES N d ctc Sa N d 3313A MOM 116 0515 N d SO E v L 8 43 CI3SIA33 NOISIA33 T T T T T T l z y 5 1 T Figure 3 Control Drawing 911 V3 20 Meter Installation 4 t 130 1 123Hs 1 HOM 21 31v2 LON OQ H LA OV6 ON 325 4 EN 001 92088 001 S9088 001 72088 00 79088 0 34 004 Y66l WS VLAISNY ONIMVAG SIHL 920 92088 920 99088 S20 72088 920 79088 2 GL 050 57088 050 69088 050 2088 050 79088 __ 34 09 AV 6 eee ip 2 ol 0 0 5 088 020 99088 oco v2099 020 79088 Wrl 6 34 oe JOMINOO ONIMVAC see SION TvAO3ddv NONY w me 06 0 300 0 Td 06 0 34010 ybuoT 6508 OD ONVBAO penas AXOLVINGAA Avqns avans avans avans 0098 SNOBNAWIC pyepuejs prepueis perdio pad o ANVdNOO HOVH 2931510395 3SIM BHLO SSIINN WRaLYW ANWdWOS HOVH cdiavi NO
24. 36 in Dimensions 2 3 H x 3 8 cm W x 13 5 L 0 9 in H x 1 5 in W x 5 31 in 0 Specifications Table 2 940 Flow Meter Specifications continued 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 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 Material Stat Kon A E ABS Plastic Cable Length 7 6 m 25 ft standard Dimensions 4 44 cm 1 75 in maximum diameter 31 435 cm 12 375 in long Mountin Dedicated Mounting Rings Permanent Mounting Bracket installs directly to pipe wall 9 Adjustable Mounting Band Kit Connection Quick Connect Downlook Ultrasonic Sensor Operating Frequency 75 kHz Beam Angle 5 Accuracy At 22 72 F still air 40 70 relative humidity from 6 in to 10 ft 15 24 or 3 048 m 0 003 m 0 01 ft Range 10 ft Operating Temperature 18 to 60 C 0 to 140 F Temperature Error 0 00005 m C 0 0001
25. MSS NOISssiWaad 103X10 1 OL 43501084 YO 3 NO333H NMOHS LON XO 33HISHM ONIHIANY OL G3Sn 38 14 NI YO 3IOHM NI LON AVW AINO NOILVW3IOHNI NI 43759 SI Ll ONIMVAC SIHL NO 035010254 NOILVW3OHNI SHL NI SIHOIa Aalv13ldOald SWIVID ANVdWOO HOVH 3O9ILON 0 60 2627 20 2627 20227 02 1400 Z0 vELb 80 2627 20 2627 20 uiz GL L308 0 10 261 10 2627 0 19271 352 Noa eR iur d mi AWO _ 130 0 Av 8ns 1301 0 Av ans 1301 0 Av ans 7 fee Arras 1 HLON31 dnxovs 1 31971 Y 1 9197 Nid fiii 7 HION31 3I8VNH3G aswolsnd Y X3N3Z SI e p LEES N d sl O s id 65 N d Y Nid im Nid ni luce 29024 A UL Nid 404 1 318V1 338 N d AlddNS 33MOd IA NIFT NI asi iS OLIO TV83lO3INI 000L Y 060 0 VWOIS OL 3 0017929 N d ea woz gt 740 14999 O0cVSZS N d YO 14051 831HW HLONST XVW 6 HAON ZEZG N d 456 uere 3 N 43O4Z NO cou Nia LES c pi ees 8 Zr N d JA 1 911 X33 TV3O3INI 1 L 55710 NOILV2O 1
26. aainssv19 snOQ3vZvH 927 NI SI 5 WAWINIW 55710 SNOGAVZVHNON WO L NI Z L SI N313WVIO LINGNOD WNWINIW NI NOILVTIVISNI WAGOW 951 dad VSI ISNY 81 NOILO3S F6 L CO 2I319313 NVIGVNVD 50191 3 334 ASIAA TIOILAY OZ WddN ISNV 3802 1VORILO3T3 TWNOILWN JHL 3ONVYONOOOY NI 38 ISNW SGOHLAW ONISIM Z 33 8313W Un 1 JONVIONGNI 3313W IU 2 JONVIIOVdVO NOISIA33 aasn 38 AVW SANTIVA LInv43d 9NIMOTIOd JHL NMONDIND 33V 318 v2 1 HO SYFLIWVAaWd TvOlMIO3133HLI dI L T T Figure 11 Control Drawing 940 V10 28 4 t v 5 9 8 31v2 LON OQ 001 8088 001 S9088 001 2088 00 79088 9 0 3 004 920 8088 920 99088 970 72088 90 79088 6 2 5 GL 1 1 4O L 123Hs HOM zi 31725 7661 WS VLAISNY ONIMVAC SIHL Meter Installation ds A S a VALN Or OMEWO3O ip ONONVHO JO3INOO ONIMVAC NONY 090 6088 0S0 S9088 090 2088 0890 79088 09 020 92088 0 0 S9088 0 0 088 020 79088 Wy 6 34 0 02 0 3401 0 14 0 0 01 0 ujbue1 ADNIOV 0 x SNe ISJONVANOL S3HONI NI SNOISNAWIG 66508 OD ANYHAOT
27. all floating point values the Modbus server or MMI must be configured to read these SCADA Modbus System Guidelines 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 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 103 Visit us at www hach com B Batteries and Chargers 91 Battery Compartment Desiccant 33 59 Battery Disposal 91 Battery Internal Memory 60 Battery iin ete tete t o etes 33 Battery Modem eene 38 Battery Storage 92 Billing Arrangement 89 C Cleaning the Flow Meters 60 C
28. d ea woz gt 30 3313WMOH 14959 00929 w a Or6 I30OW i Or8y N d 80 14061 QUE H1ON31XVW aal 10srO1d0 usog w94 38084 26058 XVN 14001 488 ALIDOTSA V3alv vainawoo cons 303280 1401 8227 N d AT8W3SSV Ase 1 AIC L SSVTO 931515510 SNOGSVZVWHNON NOILVDO1 90 18 4 Add ASIAA H NOISIA33 YOS FIO OZ Vd3N ISNY 1VOl31O313 TVNOILVN 3HL 3ONVQ3OOOY NI 38 LSNW SGOHLAW ONIMIM a WO L NI C L SI 8313WVIO LINGNOS WAWINIW N NOIIV2O1 Q3HISSv19 SNOGYVZVH WS 97 NI SI WAWINIW NOILVTIVISNI WAQOW 404 961 dd VSI ISNV 81 NOILO3S 76 1220 3009 22414 NVIGVNVD 3313W Un JONVLONANI 3313W IUZ 3ONVIIOVdvO ASN 39 AVW SANTIVA LINV4AG ONIMOT1O4 JHL NMONOIND JAY 318v O JH1 40 Sela 13WValvd TvOlal 2478 dl Figure 8 Control Drawing 940 V5 25 Meter Installation 130 133HS 1 4H5BM Cl 1vos 3 8 O0v 31v2 LON OG
29. 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 18 through Figure 13 on page 30 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 17 L v 5 9 8 L JO L133HS HHMI 2125 LON H A 6 001 9088 001 59098 001 v2098 001 79088 ws ocrid oot Aad ON 325 920 9088 920 9088 520 72089 920 79088 ___ 6 22 34 SZ 090 5088 090 9088 080 7088 090 9088 __ 0S 3578 116 020 82088 020 99088 020 72088 020 79088 wvL 6 14 0 D fu OI 3Olld RICE nui NOlO3ro3id Rr Aio one aea doro 06091 62508 OO GNV13A01 avana f wFs Avans avans Avans v ans AG 0095 j SHONI NI av SNORE AMOY Adon Dae paepueis paepu
30. 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 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 75 Visit us at www hach com 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
31. location Cat number 4087 2 5232 Opto Isolated Interface a non hazardous 4 940 or 911 Flow Meter in a hazardous location 4 4 Installing the Modem DANGER Route the cable through an approved 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 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 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 35 Meter Installation DANGER Use precautions when making modem connections as high voltage may be present on the phone wires DANGER Soyez vigilant lorsque vous connectez le modem car les fils du t l phone peuvent pr senter des tensions lev es The Sigma modem Cat No 4872 is only approved for use in the United States and Canada All modem wiring must follow the installation drawings in section 4 1 on page
32. 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 99 SCADA Modbus System Guidelines The representation of a floating point value can be broken down into a High Order and 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 poi
33. protective eye wear gt idi This symbol when noted on the product identifies the location of the connection for Protective Earth ground General Information 2 1 3 Hazardous Locations 2 1 4 Intrinsically Safe Equipment 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 products 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 fo facilities DANGER Bien que certains produits Sigma soient concus 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
34. 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 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 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 C
35. 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 38 Twist the feed tube onto the cartridge and attach the syringe tip to the feed tube Figure 39 on page 65 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 40 on page 65 Note While dispensing the oil hold the probe at an angle to allow the air to be pushed out the side port Figure 40 on page 65 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 piece 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 x Figure 38 Loading the Cartridge into the Dispensing Gun 1 Dispensing Gun 2 Silico
36. the top of the individual fiber optic conductors Tape the caps to prevent the caps from accidentally falling off 12 Tape the individual fiber optic conductors together to prevent damage while pulling the cable through conduit 13 Reassemble 4 4 2 Modem Communications 940 only The external telephone modem is a complete cellular capable modem package consisting of a Fiber Optic Interface Cat No 4413 and a Modem Controller Assembly Cat No 4443 This battery powered modem lets the user to communicate with the 940 Flow Meter over long distances using normal public telephone lines or a cellular phone Figure 20 on page 38 The Optically Isolated Modem must be installed in a non hazardous location The modem is connected to the flow meter via an integral fiber optic cable If the 940 Flow Meter is installed in a hazardous location then a suitable approved seal must be used to minimize the passage of gases or vapors where the fiber optic cable passes from the hazardous location to the non hazardous location The 940 modem communicates at speeds from 300 to 14 400 baud Connect the red and green wires from the logger modem connector to the red and green wires provided by the telephone company When connecting to a telephone line use a industrial draft outdoor rated cable Do not use extension cords intended for indoor use 37 Meter Installation Figure 20 Modem Communications 940 only non hazardous location 1 U
37. 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 Placea 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 Inspect the 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 42 Replacing the Hydrophobic Filter 1 Filter smooth side down 2 Hex head tubing nipple 3 Finished assembly 67 Visit us at www hach com Section8 Replacement Parts and Accessories 8 1 Flow Meter Replacement Parts Description Part Number RS232 Intrinsic Safety Barrier ac Power 115 V with 2 AH battery backup and intrinsically safe barrier Battery single use
38. 1 Dates usos 000 54 OL Se ALIDOTSA V33lv OL cons N d 404 Z YO ure 0 1 319 1 43a 1401 8 N d AT8W3SSV 1N3A NI 1 x33 ans Q 2 dNOND 1 L 55710 S NOILVOO1 NOILV2O1 93118510 SNOGYVZVH 9 NI SI SNIGVA WAWINIW 99115510 ShOQSVZVHNON WO L NI Z L SI YALIWVIC LINGNOD WAWINIW NI NOIL TIV ISNI WIGOW 961 VSI ISNV ANY 81 NOILO3S Y6 L CCO 300O NVIOVNVO sozsie a aad JIOILAY OZ VddN ISNV SOD WOINLOSTa TWNOILWN JHL 3ONVONOOOY 38 ISNW SGOHIAW ONIBIM Z 33 8313W Un JONVLONGNI JONVIIOVdVO a NOISIA33 ASN d8 AVW SANTIVA LINV4AG ONIMOTIOd JHL JAY 318v AHL 40 Selat3Wvaslvd TvOlalLO3T13 1 dl T T T T T T T 29 Figure 12 Control Drawing 940 V14 Meter Installation L 1 130 1 19365 Z1 31v2S NIAI OG OQ SL Orv6 9 001 S2088 001 9088 001 2088 001 v9088 ws ocrid 001 As azs Mer td 920 82088 920 39098
39. 1 cm 24 inches Multiple sensors in smaller pipes can create turbulent or accelerated flows near the sensors that may cause inaccurate measurements e Mount the sensor as close as possible to the bottom of the pipe invert to accurately measure low velocity levels 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 e 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 turbulence 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 e Avoid sites with deep rapid flows that make it physically difficult or dangerous to install the sensor e 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 provi
40. 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 Level Range Standard 0 3 0 10 ft Extended 0 9 m 0 30 ft Allowable Level Standard 10 5 m 34 5 ft Extended 31 5 m 103 5 ft Specifications Table 1 911 Flow Meter Specifications continued Submerged Area Velocity Accuracy continued Air Intake Atmospheric pressure reference is desiccant protected Operating Temperature Range 0 to 70 C 32 to 158 F Level Compensated Temperature Range 0 to 70 C 32 to 158 F Material Noryl outer shell with epoxy potting within Power Consumption lt 1 2 W 12 VDC Cable Urethane sensor cable with air vent Connector Hard anodized satisfies Military Spec 5015 Cable Lengths Available Cable Diameter Standard 9 15 23 and 30 5 m 30 50 75 and 100 ft 0 91 cm 0 36 in Dimensions 2 3 H x 3 8 cm W x 13 5 L 0 9 in H x 1 5 in 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 cm L 8 625 in x 18 25 in Weight 17 52 kg 7 98 Ib Enclosure Material PVC Enclosure Rating NEMA 6P IP67 Operating Temperature Storage Tempera
41. 3 2 amp hour typical with a 15 minute recording interval Assumes data download once per week at 10 C 50 F also affected by site conditions 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 1 second per day Unit Measurements Level in m cm ft 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 90 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 Accuracy 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 Level 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
42. 30 ft range 50 ft cable with connector I S Oil Filled Submerged AV Sensor 0 30 ft range 75 ft cable with connector I S Oil Filled Submerged AV Sensor 0 30 ft range 100 ft cable with connector I S Oil Filled Submerged AV Sensor 0 10 ft range 30 ft cable with bare leads for barrier box I S Oil Filled Submerged AV Sensor 0 10 ft range custom cable with bare leads for barrier box maximum combined cable length cannot exceed 100 ft I S Oil Filled Submerged AV Sensor 0 30 ft range 30 ft cable with bare leads for barrier box I S Oil Filled Submerged AV Sensor 0 30 ft range custom cable with bare leads for barrier box maximum combined cable length cannot exceed 100 ft I S Standard Submerged AV Sensor 0 10 ft range 30 ft cable with connector I S Standard Submerged AV Sensor 0 10 ft range 50 ft cable with connector I S Standard Submerged AV Sensor 0 10 ft range 75 ft cable with connector I S Standard Submerged AV Sensor 0 10 ft range 100 ft cable with connector 4741 5233 01 2716 4734 01 4734 02 4734 03 88064 030 88064 050 88064 075 88064 100 88074 030 88074 050 88074 075 88074 100 88264 030 88264 XXX 88274 030 88274 XXX 88065 030 88065 050 88065 075 88065 100 69 Replacement Parts and Accessories 8 2 Sensors continued Description Part Number I S Standard Submerged AV Sensor 0 30 ft range 30 ft cable with connector 1 5 Stand
43. 59 Maintenance 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 7 3 Cleaning the Flow Meters 7 4 Storing the Flow Meters 7 5 Cleaning the Connectors 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 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 materials in the probes are kept fresh blue at all times Coat connectors with lithium or di electric grease to prevent corrosion 7 6 Maintaining the Electronics Compartment 7 6 1 Fuses 7 6 2 Memory Batteries 60 Note The electronics compartment is only serviceable by a qualified electronics technician familiar with static sensitive CMOS components Permanent damage to electronic circuitry may result from improper handling Always wear a wrist grounding strap when handling CMOS electronic components The electronics compartment on both the 911 and 940 Flow Meters is protected with a Tamper Indication Seal This seal is in the form of a black plastic band on the outside of the flow meter housing The seal covers the roll pins which secure the electronics compartment end cap in place All internal fuses are self reset
44. 910 7088 320 79088 w6zzrid SZ ONIMVAC SIHL 050 52088 050 59088 050 72088 050 79088 uz 05 INdNI OlalI3WO3O 1394 e ied 6 1 IT i ona 020 52088 020 59088 020 72088 080 9088 176 13 0 a sc e 33 1933 7406 0 0ro 14060 330r0 6508 OO ONYI3AO1 GANONG LENA Avans avans avans avans AQ 0095 prepueis pama io pama to ANVdWOO HOVH 8 0385 3SIMYSHLO SSFINN MENN ANVdWOO HOWH WO cdlavi NOISSIWI3d 1O33IQ LNOHLIM 3NOANY O1 GASOTOSIC YO Q39nGO3d33 NO333H NMOHS LON XO SIBHISHM ONIHLANV 3a LOvJNvW O1 G3SN 38 I3 Vd NI XO 3IOHM NI LON AVW ANY NOILLVW3OJNI ONIBI33NION3 304 3ONJOHNOO NI 0 v 4V 60 264v 0 6 0 4 4v 0 1400 Q3nSSI SI Ll ONIMVAC SIHL NO Q3SOT1OSId NOILVW3OdNI NI SLHOIa Aalv I3ldOald SWIVIO ANVdWOO ZO vELV 80 261 202619 20 2629 7761113209 LO vely 20 2627 10 2627 10 2627 972 1392 E 130 0 v ans 1401 0 ans 1401 0 ans od ALIOOTSA CYVONVLS HL NII MOTH 0v6 OL HIONTI CXVW Lavi 33MOd AI3N3Z SI LEES N d OQA 5 1 010021 Or OOU NI dosi LAdNI OG HLONG1 XVW AIWOLSNO WS 385g XVW 13 001 13 SC g N d 3O4Z NO I318V1 433
45. AWINIW LINGNOD NI NOILVTIVISNI 304 951 da VSI ISNV ANY 81 NOILO3S Y6 L CO 3009 OI8IO3T3 NVIOVNVO SOY LE A Yd GASIAIY H 31OU3V OL VdJN ISNV 300O 1VOISLO3TH TVNOILVN JHL 32NVQ3O2OY NI 38 ISNW SGOHLAW ONIMIM MAW UN JONVLONGNI YSISW JU 2 32NVIIOVdVO NOISIA38 Q3sf 38 AVW SINIYA NYIA ONIMOTIOS 3HL NMONDIND 3182 FHL 40 SXJLIWYAY d VOI LO3T3 JHL 4 71 T T T T T T T 4 v 5 Figure 4 Control Drawing 940 V1 21 Meter Installation 130 133HS 1 Vos H Aaa CA OV6 1 ON 325 pe SINOSVALIN Or JOALNOD ONIMVAG 62908 OO GNV13A01 0095 ANVdWOD HOVH 6002 S Z a 31ONY JIYOS LON OG 766 ISNY 19483 383NION3 SSONVARTOL S3HONI NI SNOISNIWIG 2091410395 SSIMYSHLO SSIINN ANVdWOD NOISSIW2I3d 199310 LNOHLIM 3NOANY O1 GASOTOSIC YO NO333H NMOHS LON XIH1IHM ONIHLANV AANLOVINVW O1 0350 38 13 XO FIOHM NI LON AVW ANY NOILVW2IOJNI ONISSZSNIONA 20d 3ON3GIINOO NI GANSSI SI Ll ONIMVAG SIHL NO 93501054 NOILVW3IOJNI 1 NI SIHOI3 AYVLAldOdd SWIVID ANVdWOO HOVH 3OILON 0001 VW
46. CI3SIAGI Q3AO3ddv A33 NOISIA33 YOS FIO OZ Vd3N ISNY 1vOl31O313 TVNOILVN 3HL 3ONVQ3OOOV NI 38 LSNW SAOHLIW ONISIM 3313W Un JONVLONANI 3313W IUZ 3ONVIIOVdVO a ASN 38 AVW SANTIVA LINV4AG ONIMOTIOd JHL NMONXNN JAY 318v AHL 40 Selal3Wvaslvd TvOlalLO3T13 1 dl T T Meter Installation L 1 130 1 15365 4HOBM 21 avos TIVOS LON OLA OV6 19 001 52098 001 9088 001 2088 001 9088 WS 0E I4 OOF Aa ON azs 90 91088 910 9088 520 72089 520 79088 wezzri SZ ONONVETOL SIHL 090 82088 0s0 59088 050 2088 090 79088 os DIAWJD Rr orc Or6 NEU 020 52088 00 89088 020 72088 020 79088 wuvL ori 0 JOSINOO STONY E 00 100 10150 96091 608 OD ONV BAO Avans avans avans avans 0095 Tavs SSHON Nav AOL prepuejs pama no ANVdIWNOO HOVH 3 2845 SSIMYSHLO SSTINN
47. 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 warranty 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 Damage caused by misuse neglect accident or improper application or installation e Damage caused by any repair or attempted repair not authorized by Hach Company Any product not used in accordance with the instructions furnished by Hach Company e Freight charges to return merchandise to Hach Company e Freight charges on expedited or express shipment of warranted parts or product e 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
48. Figure 28 e Level the sensor using the built in bubble level e Ensure the isolation gasket is in place and the mounting bracket thumbscrews are finger tight to avoid sensor ringing e Install the sensor within 1 5 5 ft of the lowest expected level the maximum range of the sensor 51 Sensor Installation Figure 29 End View of In Pipe 1 Pipe size may vary 5 Bracket Thumbscrew 3 17 cm 1 25 in long 2 Mounting Clip 6 Bubble Level 3 Vibration Isolation Gasket 7 Sound Waves 4 Sensor 8 Flow 6 2 2 Angling the Beam The narrow beam of sound 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 6 2 3 1 Calibrating the Temperature 52 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 ig
49. ISSIW3Bd 1O38IO 1nOHIIM 3NOANY OL YO NO3N3H NMOHS LON NO YSHISHM ONIHLANV 3e LOVJNVW OL 38 I3 vd NI XO 310HM NI LON AVW AINO NOLVWMOJNI ONISGBNION3 304 3ON3QOHNOO NI GANSSI SI 1I ONIM VIG SIHL NO GaSOTOSIG NOILVW3OJNI JHL NI SIHOIN AalV LildO3id SWIVIO ANVdWOO HOYH 3OILON 0 vEZV 60 2627 20 7627 0 2V UG 0 LJO0L ZO VEZV 90 6 V 20 2627 20 2627 51 1405 AIWOLSND 0 20 2627 10 2627 10 w9 71492 ANO _ 140 0 5 1401 0 Av ans 1301 0 ans G3ONVHN3 QuvaNvis HI9N31 V 48LNI 1 31971 W3QOW g 380W errr N d eur N d JOVANI RENE Wy W9 Z Hr ONYIOSIOI O Regin xvi 0L 1492 M3J1dWVS AII2O HA V3lv wre N d mr C N d X04 Z YO Ol 1 31aV1 433 ATSW3SSV 14 061 1N3A NI HION31XVW TV3lO3INI 3OVJl3lNI Qaiv1OSFOLdO VW 0017928 N d 915 OL A a313W 14969 0027829 N d 076 HdOW Or8y N d RES 40 14 061 Due HIONST XYW 3OVJ HINI 06 ug 4 Sc j8O3d 66053 ALIDOTSA EDS H N d3O4 30 NO E 1 318 V1 433 8847 Mawassv ff wasn oaase gli 01x33 NOIIV2O1 1 AIG L SSv1O aaussvio sn davzvuNoN 2 aaHiSsv12 ShOQN VZvH Ulo 9 NI SI WAWINIW WS L NI C L SI S313WVIC LINGNOOD W
50. LE PROJECTION ANGLES 25 INTERPRET GEOMETRIC TOLERANCING PER ANSI Y14 5 1994 DO NOT SCALE DRAWING Cea HACH COMPANY 5600 LINDBERGH DR LOVELAND CO 80539 TITLE DRAWING CONTROL 911 FLASH CONV SIZE DwG NO 911 V2 REV E SCALE 1 1 __ WEIGHT SHEET 1 OF 1 Figure 2 Control Drawing 911 V2 19 Meter Installation 5 lt t 1 4 i 2 130 Lus 1 1 IWOS 32s ION OG Ad ON OMG 3zis 434 X90014 L 16 133428 NI Wvaoviad STONY Sore ox 10 XX 62908 OD AVANA 0099 4 S3HONINI SNOSNENG ANVdIWOO HOVH ava aww XGSHIOSdS ANVdWOO HOVH WOR NOISSIWYAd 1931A InOHIIM 3NOANY OL YO Q39nQO3d33 NMOHS ION 33HISHM ONIHLANY 38nI2VJNVW OL GSN 38 I3 vd NI XO 31OHM NI ION AVW XINO NOILVW3NOJNI ONISSINIONG 304 NI ANSSI SI Ll ONIM YO SIHL NO 935010510 NOUVIWNOJNI JHL NI SIHOI A3v13ldOd SWIVTO ANVdWOO HOYH 39IION 135 318VONVHO38 vel 82 0817 N d 6915 N d 920 N d ONIMVMNO ip PINO OL a 1938
51. 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 E 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 reference to holding register 40001 is addressed as register 0000 The function code field specifies the type of register accessed therefore the 4XXXxX 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 95 SCADA Modbus System Guidelines Table 14 Channels Read Holding Register Addresses Name Type Size bits of Registers SU AIR DIOE 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 Channel 2 Float 32 2 00 0C 40013 40014 Channel 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 Conductiv
52. OIS OL HION31 318 VNH3O AAWOLSND ONIMVAC SIHL OL Q33lln33 1TvAO3ddv XONIOV 001 S2088 001 s9088 001 088 001 vo0g8 uxs oeri3 001 Z0 S2088 920 99088 920 72088 S20 v9088 wezerii sz 0s0 sz088 090 9088 090 72088 090 79088 Wests 09 00 92088 020 99088 020 72088 0 0 v9088 Wri 6 14 0 33080 3401 0 330 0 3401 0 ujbue1 avans avans avans avans piepuejs pails pamato 3 1 527377 60 262 20 2627 0 9 0 14007 W3GOW Od N d 3O V Jel3lNI W cy 399 N d SJ IdWVS Gauissvio 3 NON JOYJ4XJLNI V4Cy N d X wog 14 999 _ 8 06058 0017526 N d Do OOc SZS N d AA gt GALV10SI O1d0 26058 4807 N d NO 8eZy N d a gt NOIIVOOT1 55710 SYOQNVZVHNON SO SVLE Y 43 AISIAN H A34 NOISIA33 a Qai viOSlFOldO AFIdWYS YOS JO 14061 HION31XVW 714 051 HLONAT S313WMO d Or6 I3HOW Or8y N d 80 2627 20 2617 20 2617 20 617 uc S L3OS 10 2 wg 7 L3Sc KINO _ 130
53. 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 Routes 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 wiring 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 in 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 11 General Information 2 1 5 Confined Space Entry 12 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
54. S 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 ANGLES 25 INTERPRET GEOMETRIC TOLERANCING PER ANSI Y14 5 1994 DO NOT SCALE DRAWING UNLESS OTHERWISE SPECIFIED NAME DATE DIMENSIONS ARE IN INCHES DRAWN TOLERANCES S DUKART 12 9 2005 Xx 08 ENGINEER S DUKART XX 01 XXX 005 THIRD ANGLE PROJECTION eu HACH COMPANY 5600 LINDBERGH DR LOVELAND CO 80539 TITLE DRAWING CONTROL 940 FLASH CONV SIZE DwG NO 940 V3 REV E SCALE 1 1 __ WEIGHT SHEET 1 OF 1 Figure 6 Control Drawing 940 V3 23 Meter Installation l i z i 5 i 9 i 1 130 1 13365 IHOBM 11 31725 HIVOS ION Ada ON OMG 325 766 X90014 OV6 1 I33dM3INI wvaovid 3nii Nouo3rosa STONY 10 66908 OD ONY BAOT RR ANS 0095 TET SHON M SW ANVdIWOO HOVH 3iva 4 SSIMSBHIO SSTNR ANVdWOO WO NOISSIWai3d 123 LNOHIIM SNOANV O1 GISO
55. Software 43 Site Selection 15 Software and Communications 43 Special Output Sample Output 41 Specifications e Rede e ce cba 5 iE 5 eee Een Pa 6 Storing the Flow Meters 60 T Tamper Indication Seal 60 V Velocity Only Sensor 57 Vertical Drops 15 105 Visit us at www hach com
56. TOSIC NO GIONTONAIA NO33H NMOHS LON NO HHIBHM ONIHLANY ANLOVANVW OL 351 38 Ii Vd NI SIOHM NI AWW AINO NOILVW3OJNI ONISI3NIONG 304 3ONJOHNOO NI SI LI ONIM YO SIHL NO 035010510 NOLWWAOSNI NI SIHOIN ANV1SIdONd SWIYTO ANVdWOO HOVH 3OILON 3100OW Alva AZL waqdow 90 0817 N d 15 N d S3 1dWVS YZZY N d 619 D NOILdO ZA V SDINOSVaLIn BAJI omosyann LEES N d ZO LZZY N d ONIMWAA SIHL gy Poo NOIIdO LA 1938 1VAOSddv _ AONSOV ANOLVINDY 100 N d 6 S N d 7 WIZEN 3100OW SEES N d m F VALIDOTAA 7777 177 AIIDOTSA 1007 SEES N d 01227 N d 06054 N d S0 Zv 18 4 G3AO3ddv NOISIA33 XILIW MOT Or6 Or8y N d Figure 7 Control Drawing 940 V4 24 Meter Installation L 130 1 33s 1 HOM 21 31v2 LON OQ H G A OF6 g 001 S2088 001 99088 001 72088 001 79088 WSO 001 A38 ON 375 4 920 82088 970 99088 920 72088
57. 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 37 on page 63 Tighten the screws until the gasket starts to compress 7 If using an oil filled sensor continue to follow the procedure mentioned in Replenishing the Oil on page 64 Table 11 Cleaning Solutions Acceptable Unacceptable Dish Detergent and Water Concentrated Bleach Window Cleaner Kerosene Isopropyl Alcohol Gasoline Dilute Acids Aromatic Hydrocarbons 62 Cock Maintenance Figure 36 Removing the Protective Cover Non Oil Sensor Screws 6 32 x 5 16 Protective Cover 4 5 Pressure Transducer Sensor Gasket A Figure 37 Removing the Protective Cover Oil filled Sensor Screws 6 32 x 5 16 4 Gasket Protective Cover 5 Pressure Transducer Screw set 422 56 6 Sensor 63 Maintenance 7 8 3 Replenishing the Oil The manufacturer recommends inspecting the oil in the sensor for large air bubbles during the customer scheduled service duty cycle and prior to every installation Small bubbles less than 74 in diameter of air within the oil do not affect performance Larger bubbles may minimize the anti fouling benefit of
58. 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 the rechargable battery Attach the battery connector to the center mounted connector at the bottom of the 911 case Figure 15 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 1 911 Flow Meter Case 2 3 2Amp hour rechargeable gell cell battery pack
59. YH 3OILON 0 60 2627 20 2627 0 0 1400 0 90 2627 20 2627 Z0 4 2v uz 6 1908 YSIS MOTH 0v6 OL LOVELY 20 1627 10 2627 10 L v 9 27139 w cy EP awnoso 114061 ANo L40 0 Av ans 1301 0 Av ans 1301 0 AnS 7 es MN 1 HION31 7 Gc av Y Y M Hs gus zou 7 oe 318VNIH3Q ij Mod a3WOISn 1 1665 N d SO Z N d nm AlddNS bg A N d pe I3O VJaldINI YIMOdDd wo LOPOOL N 890 MES Nid A elr N a 091 N d ai3lial v8 ATddNS 3HMOd JOVAYALNI dalv1OSsl OldO 0001 m 26058 VWOIS OL 0017925 N d ea woz 14969 oozrszs w a Or HAON ECS 7405 14 081 SOVISGINI HION31 XVW G3lV1OSl OldO 0 38084 22 SNL OO 86 2807 N d V ij H TIER C N d X047 YO urs AO SS 1 318V1 338 gt 1401 8 N d AT8W3SSV 1N3A NI TV3IO3INI 1 911 Q 2 I AIG L 512 NOILV2O1 99185710 SYhOQNVZVH WD 9 NI SI SRDIQ V3 QIN38 WAWINIW WO L NI C L SI SI3I3WVIO LINGNOS WAWINIW NI NOLLVTIVISNI WAGOW Tf NOILYOO1 41 12 SNOGSVZVWHNON FTL dd YSI ISNY ANY 81 NOILO3S Y6 L C2O 300O 22478 NVIAYNYO 27 Figure 10 Control Drawing 940 V9 90 06 18 4
60. alers and distributors To locate the representative nearest you send E mail to intl hach com or visit www hach com Technical Support Repair Service 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 intltech 9 hach com Authorization must be obtained from Hach before sending any items for repair Please contact the Hach Service Center serving your location Hach Company P O Box 389 Loveland Colorado 80539 0389 U S A Telephone 1 800 635 1230 or 970 669 3050 Fax 970 669 2932 73 Section 10 74 Contact Information for Europe For technical support repair service and ordering information please refer to the contact information below for your specific country For additional information visit www hach lange com Austria Dr Bruno Lange Ges MBH IndustriestraBe 12 A 3200 Obergrafendorf Tel 43 0 27 47 74 12 Fax 43 0 27 47 42 18 info hach lange at Belgium Dr Lange Motstraat 54 B 2800 Mechelen Tel 32 0 15 42 35 00 Fax 32 0 15 41 61 20 info hach lange be Denmark Dr Lange Danmark A S Jernhoolmen 34 40 DK 2650 Hvidovre Tel 45 0 36 77 29 11 Fax 45 0 36 77 49 11 info hach lange dk France Hach Lange Hach SAS 33 Rue du Ballon F 93165 Noisy Le Grand Tel 33 0 1 48 15 80 80 Fax 33 0 1 48 15 80 00 info hach lange f
61. ard Submerged AV Sensor 0 30 ft range 50 ft cable with connector I S Standard Submerged AV Sensor 0 30 ft range 75 ft cable with connector I S Standard Submerged AV Sensor 0 30 ft range 100 ft cable with connector I S Standard Submerged AV Sensor 0 10 ft range 30 ft cable with bare leads for barrier box I S Standard Submerged AV Sensor 0 10 ft range custom cable with bare leads for barrier box maximum combined cable length cannot exceed 100 ft I S Standard Submerged AV Sensor 0 30 ft range 30 ft cable with bare leads for barrier box I S Standard Submerged AV Sensor 0 30 ft range custom cable with bare leads for barrier box maximum combined cable length cannot exceed 100 ft 88075 030 88075 050 88075 075 88075 100 88265 030 88265 XXX 88275 030 88275 XXX 8 3 Sensor Mounting Rings and Bands Description Part Number 70 Submerged Pressure Velocity Mounting Rings for 6 24 in Pipes 6 inches 8 inches 10 inches 12 inches 15 inches 18 inches 20 21 inches 24 inches Submerged Pressure Velocity Mounting Bands for 15 42 in Pipes 15 inches 18 inches 21 inches 24 inches 27 inches 30 inches 33 inches 36 inches 42 inches 15 42 inches In Pipe Mounting Rings for 6 12 in Pipes 6 inches 8 inches 10 inches 12 inches In Pipe Sensor Mounting Bands for 15 42 in Pipes 15 inches 18 inches 21 inches 24 inches 1361 1362 1363 1364 1365 1366
62. c 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 24 on page 46 A gap of at least 5 cm 45 Sensor Installation 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 sensor is blind to anything closer than the deadband and stops reading level when the distance is shorter than that Figure 24 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 2 Figure 25 Beam Width as Distance from Transducer Increases 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
63. cally 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 cable from the sampler interface and use the other manufacturer s sampler cable Note It is the installers responsibility to ensure compatibility and proper connection of a non Sigma sampler to the Optically Isolated Sampler Interface 1 Remove the cover from the Optically Isolated Sampler Interface 2 Disconnect all the wires from the terminals labeled J4 through J6 Do not remove the wires from terminals labeled J1 through J3 3 Loosen the compression nut on the sampler cable connector and remove the cable from the interface 4 Insert the other manufacturer s sampler cable end into the cable connector of the Optically Isolated Sampler Interface 41 Visit us at www hach com Section 5 Software and Communications 51 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 Microsoft Windows program for small to medium sized flo
64. ces should any attempt be made to ground or bond the 911 or 940 Flow Meters or Opto Isolated Interfaces 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 mentaires 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 2 1 5 1 Definition of Confined Space 2 1 6 FCC Requirements General Information 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 Confined Space is any location or enclosure that presents or has the immediate potential to present one or more of the following conditions e Anatmosphere with less than 19 5 or greater than 23 5 oxygen and or more than 10 ppm Hydrogen Sulfide H2S e Anatmosphere that may be flammable or explosive due to gases vapors mist dust or fib
65. d 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 asserted 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 101 SCADA Modbus System Guidelines 102 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 e 7 Data Bits e 1 Stop bit e 1 Start bit e 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 address 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 addre
66. de a strain relief for the sensor cable and connector Figure 30 Figure 30 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 64 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 31 on page 56 to reduce 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 32 on page 56 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 55 Sensor Installation Figure 31 Attaching the Sensor to the Mounting Band 1 Nylon Wire Ties 3 Sensor 2 Screws 2 4 Mounting band Figure 32 Avoiding Silt when Mounting the Sensor 1 Pipe 2 Sensor 3 Silt 4 Water
67. 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 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 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 10 e tis 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 Approved 911 a
68. 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 transducer 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 Mounting the Ultrasonic Sensor on page 47 RS485 Time Out Flow meter did not receive data within the specified time If the 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 captu
69. details concerning the proper location of the sensor A 2 Setting an Offset For Use in a Weir A 3 Types of Primary Devices When installing a submerged sensor behind a weir the user may need to offset the actual reading from the submerged sensor to compensate 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 43 on page 78 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 and the submerged sensor is 4 in 10 cm e The 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 dista
70. ead Acid Battery Storage Recommendations Storage Temperature Maximum Recommended Storage Time 0 to 20 12 months 21 to 30 C 9 months 31 to 40 C 5 months 41 to 50 C 2 5 months 92 Appendix E SCADA Modbus System Guidelines E 1 Introduction to SCADA Modbus Communications E 2 ASCII Transmission Mode 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 purposes 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
71. eering Drawings Appendix B Eng AERA 3i Ji 120049 6 nri v WACHS 10M i NISSY SIHL HLIA 0317805 901900 339HYKD 098r N Figure 49 911 Flow Meter 83 Visit us at www hach com Appendix C Channel Installation Options Figures 50 through 54 show how to install the 911 and 940 Flow Meters in various applications Figure 50 shows Model 911 installed in a manhole with a single level velocity sensor stored in the small diameter pipe Figure 50 Small Diameter Pipes Down to Street or Building Collectors 85 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 51 Rapid signal processing and temperature compensation accurately record the change from dry to wet conditions Figure 51 Installation Setup in a Dry Channel 86 Channel Installation Options Figure 52 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 52 Installation for Multiple Source Monitoring at a Single Site 87 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 53 In some in
72. ers 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 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 employer for procedures related to confined space entry 1 The Federal Communications Commission FCC has established rules which permit this device to be directly connected to the telephone network Standardized jacks are used for these connections This equipment should not be used on party lines or coin lines 2 If this device is malfunctioning it may also be causing harm to the telephone network the device should be disconnected until the source of the problem can be determined and until repair has been made If this is not done the telephone company may temporarily disconnect service 3 The telephone company may make changes in its technical operations and procedures if such changes affect the compatibility or use of this device the telephone company is required to give adequate notice of the changes 4 If the telephone company requests in
73. eys pails io pena ro HOVH ava 3WVN 10312345 ISIMYSHLO SSIINN VII W ANVdWOO HOVH WOR 6 NOISSIW2I3d 199410 LNOHLIM ANOANV OL 5 YO NO33I3H NMOHS LON JO 2IB3HI3HM ONIHIANV AJANLOVANVW OL GASN 38 I3 Vd NI YO 31OHM NI LON AVW AINO NOILVW3IOJNI 30 OJ NI 43759 SI Ll ONIMVAC SIHL NO 93501054 NOILVW3IOJNI NI SIHOIa Aalv I3ldOald SWIVID ANVdWOO HOVH 3OILON 60 2627 0 Z6LV 0 2V 02 1400 30 2627 20 2627 20 2627 2 91 1408 10 2627 10 2627 10 2V wg 71492 1406 0 v ans 1301 0 v ans 1301 0 Av ans 15 HISN31 31971 dalvios oido 3 NSIQWVS P ure v4Zy N d 14051 XVW 3OVJeHINI GALV1OSI O1ldO 0001 ASTA YWOIS OL ea 0017529 N d ea woz 40 gt 14 999 0027629 N d 116 0915 N d za JO 091 14 XVW Meter Installation 3OV3331NI G3lv1OSl OldO Us Og W94 38034 ATI XINI ALIDOTSA OL Ue Se Nid 304 2 40 ure 1401 j N d TV3O3INI 1 gil x39 1 1 SSYTO 1 esie ROGAN NOILV2O1 laatd
74. 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 4 Replacing the Battery Compartment Desiccant A small desiccant cartridge in the battery compartment Figure 16 on page 33 and Figure 17 on page 33 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 replace 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 60 lists replacement O ring gaskets
75. formation on what equipment is connected to their lines inform them of a The telephone number that this unit is connected to b The ringer equivalence number 1 4B c The USOC jack required RJ11C and d The FCC Registration Number 13 General Information Items b and d are indicated on the label The Ringer Equivalence Number REN is used to determine how many devices can be connected to the telephone line In most areas the sum of the RENs of all devices on any one line should not exceed five If too many devices are attached they may not ring properly 2 1 7 Equipment Attachment Limitations 14 Notice The Canadian Industry Canada label identifies certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Department does not guarantee that the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situat
76. 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 4 conductor Cable Length 7 62 to 30 48 m 25 to 100 ft Dimensions 15 24 cm x 5 7 cm 6 in x 2 25 in 1 For temperatures above 40 C 104 F add 0 3 cm C 0 03 in F Section 2 General Information 2 1 Safety Information Read the entire manual before unpacking setting up 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 or 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
77. g the Appropriate Meter and Sensor Combination Use Table 4 to determine which sensor to use See Section 6 on page 45 for sensor installation instructions Table 4 Flow Meter and Sensor Configurations Flow Meter Model Level and Velocity Sensor Configurations 911 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 or Meter plus one Velocity Only Sensor and one In Pipe Downlook Ultrasonic Sensor 15 Visit us at www hach com 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 authority having jurisdiction shall have a final say DANGER Il est interdit de proc der toute installation ou configuration d un d bitm tre qui n
78. har 2 Chars 2 Chars n Chars 2 Chars 2 Chars CRLF 93 SCADA Modbus System Guidelines E 3 Address Field E 4 Function Field E 5 Data Field E 6 LRC Field 94 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 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 When 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 con
79. ibrate 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 24 on page 46 Check the sensor cable for cuts or nicks 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
80. ions Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas DANGER Users should not attempt to make such connections themselves but should contact the appropriate electric inspection authority or electrician as appropriate DANGER Les utilisateurs ne doivent pas essayer d tablir eux m mes de telles connexions mais doivent contacter l lectricien ou l organisme de v rification lectrique appropri e selon le cas The Load Number LN assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent overloading The termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all the devices does not exceed 100 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 s
81. ironnement dangereux The steps mentioned below give the installation procedure of the battery pack in the 940 1 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 4150 26 inside the battery compartment Figure 14 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 Note 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 battery retaining plate and install the two thumbscrews Replace the flow meter end cap and retighten the 5 16 socket head cap screw Figure 14 940 Flow Meter Battery Pack 1 Battery Pack 31 Meter Installation 4 2 2 Installing the Battery Pack in the 911 NO Figure 15 911 Flow Meter Case and Battery Packs 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
82. issv19 summum mn IZL dd VSI ISNY 81 6 1 ZZD IGOD OIIO3T8 NVIGVNWO YOS 31OUIV OL 3009 1vOIHLO3T3 TVNOILVN JHL HLM JONVOXODOV NI 38 ISNW SGOHIEW NIAIM Z QdAO3ddV Aaa YSIAW UNL JONWLONGNI 3313W Juz JONWLIOWdVO 38 AVW SINIYA LINV4IG ONIMOTIOS JHL NMONDIND JAY 318V2 JHL JO SXILIWYAYd TVOlMIO3TH3HLdE 1 1 T 4 Sg j 9 4 T 8 Figure 1 Control Drawing 911 V1 18 Meter Installation MUST BE MADE IN A NON HAZARDOUS LOCATION P N 5150 911 REVISION REV DESCRIPTION APPROVED E REVISED PER R 3142 05 l CONNECTION OF P N 4080 FLASH CONVERTER TO 911 FLOW METER NON HAZARDOUS CLASSIFIED LOCATION 10 FT 4 3 1m 4080 Sr FLASH CONVERTER 3 dU FLOW METER P lt lt 3 1m 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 DIMENSIONS ARE IN INCHES DRAWN TOLERANCES S DUKART 12 9 2005 x 08 ENGINEER 5 DUKART XX 01 XXX 005 THIRD ANG
83. its life DANGER Il 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 battery 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 At lower 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 911 Flow 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 off Do not attempt to open the case to gain access to the batteries there are no user serviceable parts inside 91 Batterie
84. ity 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 Table 15 Channels Units of Measure Read Holding Register Addresses Name Type Size bits of Registers Start UE 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 40063 Flow 1 Integer 16 1 00 41 40066 1 The addresses shown above return a code that represents the appropriate unit of measure 96 SCADA Modbus System Guidelines Table 16 Flow Totalizer Read Holding Register Addresses Name Type Size bits of Registers Start Start oe Registers Total Flow 1 Float 32 2 00 4A 40075 40076 Total Flow Units Integer 16 1 00 50 40081 Total Flow Multiplier Float 32 2 00 51 40083 40084 Table 17 SCADA Modbus Units of Measure Codes
85. k 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 the 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 respon
86. le acerca 60 7 6 Maintaining the Electronics Compartment sssssssssseeenene mme eene nnns 60 pe XE c 60 76 2 Memory Batteries x5 o eot pet inu Moe ELS ac a stele mathe tea e 60 7 7 Replacing the Batteries in the RS232 Interface 61 7 8 Maintaining the Submerged Area Velocity Sensor 61 7 8 1 Cleaning the Transducer Port rere 61 7 8 2 Cleaning the Submerged Area Velocity Sensor Oil filled and Non oil 62 SSV REPENSI mr PEE 64 7 8 4 Changing the Submerged Area Velocity Sensor Desiccant 65 7 8 5 Replacing the Desiccant steh tane S LEER 66 Section 8 Replacement Parts and Accessories 69 8 1 Flow Meter Replacement Parts cccsccesccceeceeecaeeeaeecaeeaeecaeccaeceeeceeeceeceeeecceceeeeeeeseeeeeeeeeeeeas 69 MEI tel Re RN DK 69 8 3 Sensor Mounting Rings and Band ettet teen teet pese 70 8 4 Ultrasonic Sensor Mounting Hardware eene enne 71 8 5 Mounting Plate Hardware for Directly Mounting to Pipe Wall 71 Section 9 Contact Information for U S A
87. level information which requires two registers to store the floating point value Note that registers are referenced from zero in the data field 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 n 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 98 The flow meter response echoes the address and function code which indicates that no problems exist in 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 SCADA Modbus System Guidelines E 12 940 Flow Meter Response Time As a result of time lags associated 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
88. lithium battery Desiccant Cartridge for battery Desiccant Cartridge for electronics Ladder Mount Ladder Hung requires P N 4839 Ladder Mount Mounting Bracket requires P N 4874 Manhole Spanner Bars 18 27 in used with suspension cable Manhole Spanner Bars 28 48 in used with suspension cable Modem 14 400 baud internal modem cellular compatible DOMESTIC SALES ONLY Requires fiber optic cable P N 4351 Modem fiber optic cable Sampler Output with cable 10 ft each side and safety barrier Suspension cable for hanging flow meter User Manual 4087 1004 4150 26 4967 4936 4874 4839 9542 9557 4872 4351 4998 4920 4979 8 2 Sensors Description Part Number In Pipe Ultrasonic Level Sensor Range 0 2 in 5 ft 25 ft cable 75 kHz Ultrasonic Sensor with horn 75 kHz Ultrasonic Sensor sensor cable 50 ft max Velocity Only Sensor with 25 ft cable Velocity Only Sensor with 50 ft cable Velocity Only with 100 ft cable Submerged Area Velocity Sensors I S Oil Filled Submerged AV Sensor 0 10 ft range 30 ft cable with connector I S Oil Filled Submerged AV Sensor 0 10 ft range 50 ft cable with connector I S Oil Filled Submerged AV Sensor 0 10 ft range 75 ft cable with connector I S Oil Filled Submerged AV Sensor 0 10 ft range 100 ft cable with connector I S Oil Filled Submerged AV Sensor 0 30 ft range 30 ft cable with connector I S Oil Filled Submerged AV Sensor 0
89. nce 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 Use the primary device illustrations that follow as general guides for proper head measurement location in commonly used primary devices Refer to Figure 44 on page 79 for Parshall Flume Figure 45 on page 80 for Palmer Bowlus Flume with Integral Approach Figure 46 on page 81 for Leopold Lagco Flume Figure 47 on page 82 for H Flume and Figure 48 on page 82 for Round Pipes Contact the primary device manufacturer for more details 77 Working with Primary Devices Submerged H Head Draw down Probe Maximum Measurement Head Height Point FLOW in Crest 5 2H Minimum Crest Height 4H Weir Plate Submerged Minimum Distance from Probe Weir Plate Figure 43 Weir 78 Working with Primary Devices Stilling Well Optional A Length of Converging Section 2 3A Length to Stilling Well ug B Head Measurement Point Submerged Probe TOP VIEW Submerged Probe
90. nd 940 Installation Drawings on page 17 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 General Information 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 required 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 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 c blage s curit intrinseque doit tre s par du c blage 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
91. nd of the returning echo a heavily coated sensor will not be able to detect the echo well and may not provide accurate level measurement 53 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 frequently 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 For specific zeroing instructions refer to the appropriate flow meter or sampler manual 6 3 2 Important Installation Guidelines for Submerged Area Velocity Sensor 54 e Do not install more than one sensor at a time in pipes less than 6
92. ne Oil Cartridge 64 Maintenance Figure 39 Attaching the Feed Tube and Syringe Qe VoU gt oje i Figure 40 Oil Replenishment 1 Sensor 3 Side port 2 Set screw 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 65 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 the bottom end cap using a slight twisting motion until its slots align with the retaining clips Figure 41 2 Remove the end cap gently by grasping it and pulling it straight out 3 Pour the desiccant beads out of the canister 4 H
93. ner tente Etude recie ede eene aee tis 15 3 1 3 Choosing the Appropriate Meter and Sensor Combination 15 Section 4 Meter Installation 2 rti eed p idu te md qe near mt 17 4 1 Approved 911 and 940 Installation Drawings 17 4 2 Installing the Batteries ossi ot Ee e eto pietati e tps obere re Quad tbe arene 31 4 2 1 Installing the Battery Pack in the 940 31 4 2 2 Installing the Battery Pack in the 911 32 4 2 3 Battery Compartment Desiccant esent 33 4 2 4 Estimating the Battery Annee dtc iade x te ed 33 4 3 Wiring the RS232 Interface uoi besten rael ad elut Re RR arbi 34 4 91 5232 uud on dept tis tod taies Dolto Marte hts c odit audes 34 4 4 Installing the Modem e ettet I Up E 35 444 Routing Fiber Optic edocet ure bas cag e 36 4 4 2 Modem Communications 940 only sssssseeeeeemme enn 37 4 4 3 egerit coe ages steady livin du e eed t et aunts 38 4 5 Wiring the Sampler Interface 39 4 6 Sampler Receptacle 940
94. nnel and 1 velocity channel logged e Data downloaded once per week e 10 C 50 F ambient temperature e Also affected by site conditions 4 3 Wiring the RS232 Interface 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 RS232 interface wiring must follow the installation drawings in section 4 1 on page 17 4 3 1 RS232 Serial Port DANGER The RS232 Opto Isolated Interface must be located in a non hazardous location DANGER L interface 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 18 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 34 Meter Installation Figure 18 RS232 Communications Setup non hazardous location 1 Use appropriate approved seal to minimize passage of 3 compatible laptop or desktop located in a gases or vapors from a hazardous location to a non hazardous location for downloading data
95. nore reflections from obstructions between the sensor and the water surface such as ladder rungs channel side walls etc 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 the 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 6 2 3 2 Calibrating the Liquid Depth 6 2 3 3 Calibrating the Sensor Height 6 2 3 4 Invisible Range Deadband Sensor Installation Liquid depth calibration 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 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
96. nt 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 E 14 Port Expanders and Protocol Converters 100 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 c
97. ogram Complete Output Pin F of the auxiliary connector is disabled on Number Green the sampler then it is used to transmit the bottle number to the connected L Input device 900 MAX Time A 200 ms Only 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 via Pin F C BLUE 4 ORANGE WHITE A YELLOW BLACK gt GREEN YELLOW O BLACK GREEN 5 BROWN RED 2 DO NOT TIN WIRES PRIOR TO TERMINATION Figure 22 Sampler Interface Wiring 39 Meter Installation 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 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 bitmetre 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 23 The option provides several features e Flow proportional sampling
98. old the canister up to the light and inspect the hydrophobic filter e 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 on page 67 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 41 Removing the Bottom End Cap 1 End Cap 2 Desiccant Container 66 Maintenance 7 8 5 1 Replacing the Hydrophobic Filter A single Teflon9 hydrophobic filter Cat No 3390 is installed in the top of the canister to prevent liquid from entering the vent tube For best performance and to avoid grease buildup on the filter during submergence or surcharge conditions hang the canister vertically so that the end facing the sensor points downward 1 Disconnect the
99. ombined Sewer Overflow CSO Application 88 Continuity Channel 89 D Data Retrieval 43 Desiccant Maintenance 59 Difficult Sites cesse 15 Downlook Ultrasonic Sensor 45 Dry Channel tee nete 86 E Elbows Sharp turns and Y connections 15 Engineering Drawings 83 Event e hte et tea 39 F FCC Requirements 13 Flow Equations eeeeerenn 43 Flow proportional sampling 40 Flow Pulse Output 39 FUSES cien nct t n 60 In Pipe Ultrasonic Sensor 51 InSight amp Data Analysis Software 43 Installation Considerations 15 Installing the Battery 31 Intrinsically Safe Equipment 10 Intrinsically Safe Installation Requirements 10 Intrinsically Safe Wiring Practices 11 Invisible Range EARE 45 L Ladder RUNGE i ete tette tte ete ds 45 Lead Acid 91 Maintenance 59 Memory Batteries
100. ompression MNP10EC Cellular Protocol RS232 at 19 2 k baud Submerged Area Velocity Accuracy 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 Level 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 Level Range Standard 0 3 m 0 10 ft Extended 0 9 m 0 30 ft Allowable Level Standard 10 5 m 34 5 ft Extended 31 5 m 103 5 ft Air Intake Atmospheric pressure reference is desiccant protected Operating Temperature Range 0 to 70 C 32 to 158 F Level Compensated Temperature Range Material 0 to 70 C 32 to 158 F Noryl outer shell with epoxy potting within Power Consumption 1 2 W 12 VDC Cable Urethane sensor cable with air vent Connector Hard anodized satisfies Military Spec 5015 Cable Lengths Available Standard 9 15 23 and 30 5 m 30 50 75 and 100 ft Cable Diameter 0 91 cm 0
101. on page 48 and Figure 27 on page 49 For mounting options see Replacement Parts and Accessories on page 69 Each bracket utilizes the 1 9 cm 34 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 47 Sensor Installation This surface must be level Figure 26 Permanent Bracket and Isolation Washers 1 Wall Rail Mount Bracket Cat 2974 3 Downlook Ultrasonic Sensor 2 Isolation Washers Cat No 6820 4 1inchx0 25 Hex Nuts Cat 1429 48 Sensor Installation Figure 27 Adjustable Mounting Bracket Cat No 2904 1 14 75 inches Cat No 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 49 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 Recal
102. ontrol 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 E 15 Other Reference Material E 16 Troubleshooting Tips SCADA Modbus System Guidelines SCADA ANSI Specification ANSI IEEE 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 AEG Schneider Automation Modicon ladder logic block library user guide North Andover MA AEG Schneider Automation Inc 1996 Problem 940 Flow Meter responds to some Modbus messages but not all Response Chec
103. or caution statement in the manual This symbol if noted on the instrument references the instruction manual for operation and or safety information 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 charge 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
104. 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 microprocessor 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 Locate the ultrasonic sensor at the proper head measurement point for that primary device e 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 et
105. r Germany Dr Bruno Lange GmbH amp CO KG Willst tterstr 11 D 40549 D sseldorf Tel 49 0 2 11 52 88 0 Fax 49 0 2 11 52 88 143 info hach lange de Great Britain Hach Lange LTD Lennox Road Basingstoke Hampshire RG22 4AP Tel 44 0 12 56 33 34 03 Fax 44 0 12 56 33 07 24 info hach lange co uk Italy Dr Bruno Lange s r l Via Riccione 14 1 20156 Milano Tel 39 02 39 23 14 1 Fax 33 02 39 23 14 39 info 9 hach lange it Poland Hach Lange sp zo o ul Opolska 143 a PL 52 013 Wroclaw Tel 48 71 3 42 10 81 Fax 48 71 3 42 10 79 info hach lange pl The Netherlands Dr Lange Nederland B V Laan an Westroijen 2a NL 4003 AZ Tiel Tel 31 0 3 44 63 11 30 Fax 31 0 3 44 63 11 50 info 9 hach lange nl Spain Portugal Hach Lange S L U c Araba 45 Apdo 220 E 20800 Zarauz Guipuzcoa Tel 34 9 43 89 43 79 Fax 34 9 43 13 02 41 info hach lange es Sweden Hach Lange AB Vinthundsvagen 159A 5 128 62 Sk dal Tel 46 0 8 7 98 05 00 Fax 46 0 8 7 98 05 03 info hach lange se Switzerland Dr Bruno Lange AG Juchstrasse 1 CH 8604 Hegnau Tel 41 0 1 9 45 66 10 Fax 41 0 1 9 45 66 76 info hach lange ch Section 11 Warranty Hach Company warrants this product 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 In the event that a defect is discovered during the warranty period Hach
106. 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 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 between 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 sou
107. re 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 50 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 reaches 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 7 LLLLLLLL 2 2772 SSSSSSSSNN 6 AS MOMMA ON Figure 28 Side View of In Pipe 1 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 e Mount the sensor over the center of the flow stream where the surface turbulence is minimized Figure 29 on page 52 e Mount the sensor 46 cm 18 in away from obstructions located in front of the in pipe sensor to prevent inaccurate liquid level readings
108. ries into the RS232 interface making certain the polarity is correct Figure 35 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 e Level data are missing or incorrect but velocity data are valid e Excessive silt has deposited between the transducer and its protective cover 61 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 Bleach permanently damages the sensor Refer to Table 11 for acceptable cleaning solutions 2 Remove the screws from the protective cover Figure 36 and Figure 37 on page 63 3 Remove the cover and gasket 4 Swirl the sensor carefully in an appropriate cleaning solution to remove soil
109. s System Guidelines E 7 Communication Parameters E 8 User Memory Customizing 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 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 Table 13 Modbus ASCII Memory Input Output Referencing System Reference Indicator Reference Type Meaning Discrete Output or Coil Binary 1xxxx Discrete Input Binary Input Register Real 4XXXX Output Holding Register Real Extended Memory Register Real The memory data is stored in 16 bit words Within the predefined function codes of the
110. s accept submerged area velocity sensors velocity only sensors or a combination of the two 6 4 2 Installing the Velocity Only Sensor Installation instructions for the velocity only sensor are similar to the submerged area velocity sensor Refer to the following sections for more information on velocity only sensor installation e Connecting the Submerged Area Velocity Sensor to the Mounting Bands on page 55 e Placing the Submerged Area Velocity Sensor and the Mounting Band into the Pipe on page 56 6 4 3 Calibrating the Velocity Only Sensor The velocity sensor does not require calibration The transmit frequency is fixed by a highly accurate quartz crystal controlled frequency generator 58 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 taches 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
111. s and Chargers 940 Flow Meter This flow meter uses a 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 incinerate or expose to water If local government does not allow for the disposal of these batteries contact the manufacturer for proper disposal arrangements 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 55 shows the storage self discharge characteristics of lead acid batteries at various ambient temperatures Table 12 shows recommended storage times for lead acid batteries Gel Cell Self Discharge Characteristics 80 60 40 Remaining Capacity 20 100 ha __ t oe 10 C I A Duct 30 4 40 C 5 9 12 15 18 0 0 Storage Time months Figure 55 Battery Discharge Characteristics Table 12 L
112. se appropriate approved seal to minimize passage of 4 Fiber Optic Modem Interface Cat No 4413 gases or vapors from a hazardous location to a hazardous location Cat No 4443 2 Optically Isolated Modem Controller Assembly ina 5 940 Flow Meter in a hazardous location 3 Incoming phone line supplied by others 4 4 3 Modem Batteries 6 Integral Fiber Optic Cable 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 Fiber Optic Modem option Cat No 4923 uses four 4 9 volt industrial quality alkaline batteries The modem is shipped with the batteries but are not installed Prior to placing the modem in service it is necessary to remove the front cover and install all four 9 volt alkaline batteries Figure 21 Battery 3 Industrial Industrial Alkaline Alkaline Battery Battery 2 1 Industrial Industrial Alkaline Alkaline Figure 21 Modem Battery Installation 38 Meter Installation 4 5 Wiring the Sampler Interface 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 17 Refer
113. sists 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 are 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 SCADA Modbu
114. ss 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 MMI 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
115. stances the overflow in some CSO applications may be too turbulent for accurate measurement Figure 53 Installation for Combined Sewer Overflow CSO Applications 88 Channel Installation Options Custody transfer or interagency billing demand redundant measurement for chain of custody In Figure 54 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 submerged flow condition Figure 54 Installation for Custody Transfer or a Billing Arrangement 89 Visit us at www hach com Appendix D 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 D 1 Lead Acid Gel Cell Batteries 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
116. ting and require no maintenance There are no other user serviceable components inside the electronics compartment 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 InSight or Vision See the software manual for details 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 cells Under normal circumstances the batteries 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 35 2 Remove the old batteries Install fresh batte
117. tion Note The fiber optic modem contains numerous static sensitive components The installer should ground himself by suitable means prior to opening the modem case to prevent possible static discharge to the modem components Failure to do so could result in permanent damage to the modem 5 Pull up on the red plastic wire harness carefully with a small pair of needle nose pliers to disconnect the wire harness from the external housing 6 Remove the four Phillips head screws that secure the modem assembly to the plastic enclosure 7 Hold the printed circuit board with both hands by the battery connections Note Do not attempt to pull the fiber optic cable through conduit by the individual conductors or permanent damage may occur Pull the cable only by the external sheath 8 Lift up the printed circuit board gently and to the left to remove it from the external housing 9 Pry on the fiber optic cable ends carefully to pop the fiber optic cable out of the printed circuit board connectors using only the thumb nail Do not pull on the individual fiber optic conductors as damage may result to the conductors 10 Pull on the exterior sheath of the fiber optic cable gently and pull the cable out of the modem housing Note The ends of the individual fiber optic cable connectors are polished Use extreme care when handling the cable to prevent damage to the conductor terminations 11 Install the supplied protective caps over
118. to Table 7 and Figure 22 Table 7 Sampler Cable Connector Pin Assignments and Description Wire arr Pin Letter Color Description Rating White 12 V dc input 12 V de P B Provides the ground line that is used in conjunction with the other signals Blue Ground on this connector C 8 V dc Output Used in conjunction with Pin B ground to signal a sampler that a current is 100 mA Flow Pulse 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 D condition is met so that it can begin sampling Used in conjunction with Pin B Sampler Black HARE 24 V dc max 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 F Bottle Number signal description Bottle If the Pr
119. ture 18 to 60 C 0 to 140 F 40 to 60 C 40 to 140 F Power Source One 12 V 25 amp lithium battery pack Battery Life 365 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 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 cfm 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 dc pulse 100 mA max at 500 ms duration with approved interface Specifications Table 2 940 Flow Meter Specifications continued Communications Connection Serial connection via optically isolated interface to IBM compatible computer with analysis software Fiber Optic Modem Local Terminal 14400 V 32 bis V 42 MNP2 4 error correction V 42 bis MNP5 data c
120. uitability 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 sensor 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 Choosin
121. w monitoring jobs Vision Integrated Sewer System Management Software provides high end automated data collection and automated batch report processing using an unlimited number of meters Vision is a Microsoft Windows program Modicon Modbus Protocol 940 Only 5 2 Programming and Analysis Options Built in flow equations Pager activation upon alarm condition with modem option 940 only 2 way Modem 940 only and serial communications Storage of 116 000 data points in battery backed RAM memory 940 only 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 43 Visit us at www hach com 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 taches 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 Working with Primary Devices on page 77 for more information The transducer emits a

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