Greyline AVFM 6.1 User Manual Download Page 3

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AVFM 6.1 Area-Velocity Flow Meter

INDEX

CONNECTIONS ................................................................................................ 4

FUNCTION

TEST .............................................................................................. 4

KEYPAD

SYSTEM ............................................................................................ 6

CALIBRATION

MENU ..................................................................................... 7

ICONS ................................................................................................................. 8

MESSAGE

ICON ............................................................................................... 9

STATUS.............................................................................................................. 9

PASSWORD ..................................................................................................... 10

SELECTIONS ...................................................................................... 11

UNITS/MODE .................................................................................................. 11

CALIBRATION................................................................................................ 13

RELAY

PARAMETERS .................................................................................. 18

DATA

LOGGING............................................................................................. 19

COMMUNICATION

PTIONAL

) .................................................................... 21

SPECIAL

FUNCTIONS ................................................................................... 22

INSTALLATION

–

SENSOR

LOCATION ..................................................... 24

ENCLOSURE

INSTALLATION ..................................................................... 31

FIELD

TROUBLESHOOTING ........................................................................ 32

APPLICATIONS

HOTLINE ............................................................................ 35

PRODUCT

RETURN

PROCEDURE ............................................................... 35

APPENDIX

–

OPTIONS ............................................................................... 37

MODBUS®

COMMUNICATION ................................................................... 43

SPECIFICATIONS ........................................................................................... 58

IMPORTANT NOTE: This instrument is manufactured and calibrated to meet product specifications.
Please read this manual carefully before installation and operation. Any unauthorized repairs or
modifications may result in a suspension of the warranty.

Available in Adobe Acrobat pdf format

Summary of Contents for AVFM 6.1

Page 1: ...www greyline com USER S GUIDE Installation Operation Instructions Area Velocity Flow Meter Model AVFM 6 1 Manual Series A 1 ...

Page 2: ...Note This page has been left blank intentionally ...

Page 3: ...22 INSTALLATION SENSOR LOCATION 24 ENCLOSURE INSTALLATION 31 FIELD TROUBLESHOOTING 32 APPLICATIONS HOTLINE 35 PRODUCT RETURN PROCEDURE 35 APPENDIX A OPTIONS 37 MODBUS COMMUNICATION 43 SPECIFICATIONS 58 IMPORTANT NOTE This instrument is manufactured and calibrated to meet product specifications Please read this manual carefully before installation and operation Any unauthorized repairs or modificat...

Page 4: ...current fuse or circuit breaker in the building in close proximity to the equipment that is marked as the disconnect switch Risk of electric shock Loosen cover screw to access connections Only qualified personnel should access connections Note Use of instrumentation over 40 C ambient requires special field wiring Note User replaceable fuse is 2 Amp 250V T2AL250V FUNCTION TEST Connect the sensor to...

Page 5: ...C NO C NC 4 20mA FLOW RLY2 RLY1 NC C NO NC C NO NC C NO NC C NO RLY3 RLY4 RLY5 RLY6 EXTRA RELAYS OPTION POWER INPUT HEATER OPTION SENSOR GND AC GND SERIAL COMMUNICATION OPTION RS 485 Output G 4 20mA VELOCITY 4 20mA LEVEL BLK SENSOR R CVR GND GND TMTR GR N WHT CORE GND ...

Page 6: ... show the four directions to leave a menu box Pressing a corresponding keypad arrow will move to the next item in the direction shown Move the cursor underline under numerals and increase or decrease numerals with the and keys To store settings permanently even through power interruptions press ...

Page 7: ...9 15 00 Min Time Relay Parameters Relay 1 Function Flow min On 1000 USG min Off 0 000 USG Special Functions Language English Analog Out 4 20mA Backlight High Reset Totalizer NO Neg Totals NO Rev Flow Off Capture Par No Capture WF No Restore Defaults NO New Password 0000 Data Logging Log Site ID 0 Mode Flow File Format LG2 Date Feb 9 27 201 Time 11 27 40 Interval 10sec Data Log Logging Configuratio...

Page 8: ... series level sensor option Echo loss 3 2 1 No Echo PZxx series level sensor option 1 2 Message waiting Press Data logging off 1 2 Data logging on 1 2 3 4 USB file download File download completed Download Error Echo OK Dry sensor No water in pipe channel 3 2 1 ...

Page 9: ...in the Units Mode menu The flow is calculated based on the individual level and velocity data and the channel shape and size programmed in the Channel Setup menu Min Flow Displays a read only value of the minimum flow cutoff Any flow rate measured below this Min Flow will be displayed as 0 on the LCD display Signal Strength Displays the strength of the received Doppler velocity signal on a 0 100 s...

Page 10: ...ay to view a formatted flow report from instruments with a built in data logger Press to pan through Flow Velocity and Level summaries Press to scroll down one day or repeatedly to scroll to a specific date Up to 365 days can be stored for Flow Level and Velocity Newest date will overwrite the oldest Press to return to the main display Inserting a USB drive into the meter while on this screen will...

Page 11: ... then the to the next menu item At Volume press the and then the or to select units for volume Note bbl denotes US oil barrels Press the to store your selection then the to the next menu item At Multiplier press the and then the or to select the totalizer multiplier Multipliers are used when resolution down to single digit is not required or when you don t want to convert from gallons to thousands...

Page 12: ...ubic meters per minute ft3 s cubic feet per second m3 s cubic meters per second bbl d barrels per day 1 bbl 42 USG IG d Imperial gallons per day bbl h barrels per hour 1 bbl 42 USG IG d Imperial gallons per day bbl m barrels per minute 1 bbl 42 USG gal IG d Imperial gallons per day bbl d barrels per second 1 bbl 42 USG gal IG d Imperial gallons per day USMG d US million gallons per day IMG d Imper...

Page 13: ...t the maximum height the level should reach in the system in units configured in the Units Mode menu If a Round pipe is selected in the Channel Setup menu then this value should be set to the same value as the inside diameter Min For QZ02L submersible default level sensor set the minimum height the level should reach in the system in units configured in the Units Mode menu Minimum level for the QZ...

Page 14: ...n Flow the reading on the LCD display and output signals will report 0 20mA Set the 20mA value for the flow analog output in units configured in the Units Mode menu 4mA Set the 4mA value for the flow analog output in units configured in the Units Mode menu Lvl Offset For the QZ02L sensor only Set to 0 00 when sensor is mounted at the bottom of a channel pipe When the sensor is mounted above the fl...

Page 15: ...ening Factory default value is 10 LOE Time Should the level reading be lost because of air or debris in the system the LOE Time will cause the meter to hold the last valid level reading until the LOE Time is expired at which point the meter will produce a Loss of Echo alarm message Having a LOE Time in the meter means that intermittent air or debris issues in the system will not cause the meter to...

Page 16: ...pipe Rectangle Select Rectangle for rectangular channels Enter the channel width Trapezoid Select Trapezoid for trapezoidal shaped channels Specify the Width and Slope of the channel as shown in the following illustration Egg Select Egg for Egg shaped channels Enter the Height of the channel Channel Setup Type Round 0 75ft Pipe ID ...

Page 17: ... Enter the increment number if you want to edit a previous entry or to skip entering widths for some levels Note The custom channel will interpolate widths between entry points Width Enter the measured width of the channel at the level shown Note To enter 0 width you must press and then to store a 0 width data point Level Displays the level of the channel for each increment and width entry Note Cu...

Page 18: ...nd pulse duration is 350 milliseconds Flow On Position the cursor under the numerals and press or to set digits to the relay On set point Off Set digits to the Off set point Velocity On Position the cursor under the numerals and press or to set digits to the relay On set point Off Set digits to the Off set point Level On Position the cursor under the numerals and press or to set digits to the rela...

Page 19: ... of an interval for what is required will result in larger data files which may take a long time to download to USB Reference page 15 for specific download times In critical installations data should be downloaded often Data Log Stop Start or Delete the log file Press or to select Delete and to delete the log file Press or to select Start and to start the logger Important Note You MUST Delete an o...

Page 20: ...t the maximum number of downloads for that instrument are on the USB flash drive Older files can be erased or moved from the flash memory drive or a new memory drive can be used Note Downloading files in lg2 format will take approximately 35 seconds per 1 of internal log memory used Downloading files in csv format will take approximately 8 minutes per 1 of internal log memory used OPENING LG2 FILE...

Page 21: ...esistor TB1 TB2 OFF TB2 TB3 ON Biasing None Protocol Choose MODBUS Address Device address for the AVFM Valid range 001 247 Default 001 This number should be unique across the bus Press or to scroll to select digits and press to store the setting BPS Baud rate for the MODBUS communications Press or to select and to store the setting Options 4800 9600 19200 38400 57600 76800 and 115200 Default 9600 ...

Page 22: ...able flow direction measurement Select Off to disable flow direction measurement so that flow in either direction is displayed and output as positive values Select Invert to invert the sense of the flow measurement Capture WF This function should only be used when instructed by a Greyline representative to do so The function captures the ultrasonic signal so that it can be evaluated by Greyline Ca...

Page 23: ...s Test Select Maximum and press to simulate maximum Flow Level and Velocity and to output 20mA 5V to the analog channels Select Minimum and press to simulate minimum Flow Level and Velocity and to output 4mA 0V to the analog channels To simulate an intermediate Flow Level and Velocity set Test to Actual and then enter a value for the Level and Velocity The Flow calculation analog outputs and contr...

Page 24: ...al the best accuracy will occur where flow is evenly distributed across the channel pipe and free of turbulence Specific installation considerations are listed and discussed in more detail below 1 Open Discharges or Pipe Channel Outfalls When the QZ02 sensor is to be mounted in front upstream of an open discharge or pipe channel outfall the sensor should be placed at least 5 times the maximum head...

Page 25: ... be mounted in front upstream of a hydraulic dam or a Greyline VD pipe dam the sensor should be placed at least 20 inches in front of the dam 3 Pipe Grade The pipe channel in which the QZ02 sensor is mounted should not have a grade exceeding 3 Pipe Channel Side View Grade 3 QZ02 Sensor ...

Page 26: ...uld be free of bends tees sudden changes in slope and there should not be objects in the pipe channel which disturb the flow profile in front of the sensor In general the QZ02 sensor should be mounted with at least 10 pipe diameters or channel widths of straight run upstream and 5 pipe diameters or channel widths downstream ...

Page 27: ...plied Ensure that the sensor is parallel to the water surface check with a level Mount with the tapered end of the sensor pointing upstream and the sensor cable pointing downstream Clip or tie wrap the sensor cable securely to the pipe or channel wall Note The mounting bracket is designed to release the sensor if weeds or rags are caught by the sensor ...

Page 28: ...Page 28 AVFM 6 1 Area Velocity Flow Meter ...

Page 29: ...e will point downstream Turn the adjustment nut clockwise to expand the bracket and secure to the pipe wall by friction fit Insert the sensor into the mounting bracket and tie wrap the sensor cable securely to the pipe band using the holes provided OPTIONAL QZ02L B VELOCITY SENSOR MOUNTING Mount the velocity sensor at or near the bottom of the channel or pipe in a position where it will be continu...

Page 30: ...l sensor in an unobstructed position at least 8 203 2 mm above the high water level Install the stainless steel mounting bracket in a horizontal position check with a level and then insert the PZ15 LP sensor WATER PZ1 LP 5 PZ1 LP MANHOLE MOUNTING 5 PZ1 LP 5 WATER PZ1 LP PIPE MOUNTING 5 QZ02L VELOCITY SENSOR B 8 203 2mm 8 203 2mm ...

Page 31: ...2 Insert 12 screws supplied through the four enclosure mounting holes to secure the enclosure to the wall or mounting stand Additional conduit holes can be cut in the bottom of the enclosure with a hole saw or Greenlee type hole cutter DO NOT make conduit wiring entries into the top of the enclosure Note This non metallic enclosure does not automatically provide grounding between conduit connectio...

Page 32: ...ulent flow very aerated flow relocate sensor or use PZ15 LP sensor not level level sensor with Bullseye level sediment dirt grease build up on sensor clean sensor with liquid soap Level Inaccurate sensor not mounted at bottom of pipe channel set a Lvl Offset in Calibration menu VELOCITY QZ02L SENSOR SYMPTOMS FAULTS SOLUTIONS No velocity reading grease sediment on sensor improper hook up not enough...

Page 33: ...Resistance should be approximately 82 5K ohms for any cable length High readings indicate an open circuit and low readings indicate a short or partial short in the sensor cable Unplug the 2 pin green sensor terminal from the level board and connect the multimeter to the pins Resistance should be approximately 10K Ohms for any cable length High readings indicate an open circuit and low readings ind...

Page 34: ...Page 34 AVFM 6 1 Area Velocity Flow Meter Resistance vs Temperature ...

Page 35: ...phone or email to obtain an RMA number Returned Merchandise Authorization This ensures fast service and correct billing or credit When you contact Greyline please have the following information available 1 Model number 2 Serial number 3 Date of Purchase 4 Reason for return description of fault or modification required 5 Your name company name address and phone number 2 Clean the Sensor Product Imp...

Page 36: ...ong with a copy of your invoice This warranty does not cover damages due to improper installation or handling acts of nature or unauthorized service Modifications to or tampering with any part shall void this warranty This warranty does not cover any equipment used in connection with the product or consequential damages due to a defect in the product All implied warranties are limited to the durat...

Page 37: ... rigid metal conduit for mechanical and electrical noise protection Recommended installation with a junction box is illustrated below 62 RG AU COAXIAL MAX TOTAL CABLE LENGTH 500 ft 152m 62 coaxial RG AU CONDUIT RECOMMENDED FOR MECHANICAL PROTECTION EXTENDED SENSOR CABLE TO ELECTRONICS ENCLOSURE TO ULTRASONIC LEVEL SENSOR TO VELOCITY SENSOR SHIELDED COAXIAL PAIR MAX TOTALCABLE LENGTH 500 ft 152m SH...

Page 38: ...Page 38 AVFM 6 1 Area Velocity Flow Meter COAXIAL CABLE PREPARATION VXC AVFM sensor cable can be cut and spliced up to a maximum length of 500 ft 152 m Cable ends must be prepared as illustrated below ...

Page 39: ...rea Velocity Flow Meter JUNCTION BOX OPTION JB2X JB4X NEMA4X IP66 polycarbonate Junction Box with terminal strips is available from Greyline Instruments Includes compression fittings for watertight coaxial cable entries ...

Page 40: ...Page 40 AVFM 6 1 Area Velocity Flow Meter SS PIPE MOUNTING BAND OPTION VSJ ...

Page 41: ...ous location rated Class I Division 1 Groups C D Class II Division 1 Groups E F G Class III Intrinsic Safety Barriers may be ordered with the Greyline instrument and are supplied mounted in the Greyline instrument enclosure Replacement barrier fuses Part No ISB 011239 may be purchased separately The instrument enclosure containing the Intrinsic Safety Barriers must be installed in a non hazardous ...

Page 42: ...er Barrier Specifications To safely install Greyline transducer s certified for use in hazardous locations you must refer to the installation drawings specifications of the certified transducer s TRANSDUCER CONNECTIONS STAHL 9001 02 093 390 101 1 2 3 4 BARRIER SPECIFICATIONS 9001 02 093 390 101 STAHL BARRIER 9 6V 27 ohms Um 250V V0C 9 3V ISC 390mA P0 906 8mW Ca 4 1µF La 0 16mH System Parameters En...

Page 43: ...terminal block if your AVFM 6 1 was ordered with this card or if one was added after installation Card location SERIAL COMMUNICATION AC L N NO C NC NO C NC 4 20mA RLY2 RLY1 AC GND NC C NO NC C NO NC C NO NC C NO RLY3 RLY4 RLY5 RLY6 EXTRA RELAYS OPTION POWER INPUT HEATER OPTION RS 485 Output G SENSOR GND SENSOR RCVR GND GND TMTR ...

Page 44: ...en Odd Default Even Stop Bits 1 2 Default 1 Termination 120 Ohms or none Default None Jumper JP1 position 1 2 OFF No term Jumper JP1 position 2 3 ON Term Biasing None Flow Control None Termination Jumper Position Function Codes Supported 01 Read Coil s 02 Read Discreet Input s 04 Read Input Register s 05 Write Single Coil 06 Write Single Register 15 Write Multiple Coils 16 Write Multiple Registers...

Page 45: ... Floating Point Register 2 of 2 30003 Flow Velocity m s Input Register Floating Point Register 1 of 2 30004 Flow Velocity m s Input Register Floating Point Register 2 of 2 30101 Flow Rate GPM USG min Input Register Floating Point Register 1 of 2 30102 Flow Rate GPM USG min Input Register Floating Point Register 2 of 2 30103 Flow Rate L sec Input Register Floating Point Register 1 of 2 30104 Flow R...

Page 46: ... Register Floating Point Register 1 of 2 USMG US Million Gallons 30124 Flow Rate USMG min Input Register Floating Point Register 2 of 2 USMG US Million Gallons 30125 Flow Rate USMG hr Input Register Floating Point Register 1 of 2 USMG US Million Gallons 30126 Flow Rate USMG hr Input Register Floating Point Register 2 of 2 USMG US Million Gallons 30127 Flow Rate USMG day Input Register Floating Poi...

Page 47: ...er Floating Point Register 2 of 2 IG Imperial Gallons 30149 Flow Rate IMG sec Input Register Floating Point Register 1 of 2 IMG Imperial Million Gallons 30150 Flow Rate IMG sec Input Register Floating Point Register 2 of 2 IMG Imperial Million Gallons 30151 Flow Rate IMG min Input Register Floating Point Register 1 of 2 IMG Imperial Million Gallons 30152 Flow Rate IMG min Input Register Floating P...

Page 48: ...0 Previous day Average Flow Rate ft3 min Input Register Floating Point Register 2 of 2 30171 Previous day Average Flow Rate m3 hr Input Register Floating Point Register 1 of 2 30172 Previous day Average Flow Rate m3 hr Input Register Floating Point Register 2 of 2 30173 Previous day Average Flow Rate USG sec Input Register Floating Point Register 1 of 2 30174 Previous day Average Flow Rate USG sec...

Page 49: ...gister Floating Point Register 2 of 2 USMG US Million Gallons 30193 Previous day Average Flow Rate L min Input Register Floating Point Register 1 of 2 30194 Previous day Average Flow Rate L min Input Register Floating Point Register 2 of 2 30195 Previous day Average Flow Rate L hr Input Register Floating Point Register 1 of 2 30196 Previous day Average Flow Rate L hr Input Register Floating Point ...

Page 50: ...Point Register 1 of 2 IMG Imperial Million Gallons 30218 Previous day Average Flow Rate IMG hr Input Register Floating Point Register 2 of 2 IMG Imperial Million Gallons 30219 Previous day Average Flow Rate IMG day Input Register Floating Point Register 1 of 2 IMG Imperial Million Gallons 30220 Previous day Average Flow Rate IMG day Input Register Floating Point Register 2 of 2 IMG Imperial Millio...

Page 51: ...llons 30314 Volume Total IMG Input Register Floating Point Register 2 of 2 IMG Imperial Million Gallons 30315 Volume Total bbl Input Register Floating Point Register 1 of 2 bbl US Oil Barrel 42 Gallons 30316 Volume Total bbl Input Register Floating Point Register 2 of 2 bbl US Oil Barrel 42 Gallons 30317 Previous day Volume Total Gallons Input Register Floating Point Register 1 of 2 30318 Previous...

Page 52: ...nstalled 30504 Sensor Range feet Input Register Floating Point Register 2 of 2 Only used when through air sensor is installed 30505 Sensor Range mm Input Register Floating Point Register 1 of 2 Only used when through air sensor is installed 30506 Sensor Range mm Input Register Floating Point Register 2 of 2 Only used when through air sensor is installed 30507 Sensor Range meters Input Register Flo...

Page 53: ...t Register 2 of 2 30928 mA Output 1 4mA Value Input Register Floating Point Register 1 of 2 30929 mA Output 1 4mA Value Input Register Floating Point Register 2 of 2 30930 mA Output 1 20mA Value Input Register Floating Point Register 1 of 2 30931 mA Output 1 20mA Value Input Register Floating Point Register 2 of 2 30932 mA Output 2 4mA Value Input Register Floating Point Register 1 of 2 30933 mA O...

Page 54: ...0 Feet per Second 1 Meter per Second 30948 Flow Units Input Register Index 0 to 31 0 US Gallons per Minute 1 Litres per Second 2 Cubic Feet per Minute 3 Cubic Meters per Hour 4 US Gallons per Second 5 US Gallons per Hour 6 US Gallons per Day 7 Cubic Feet per Second 8 Cubic Feet per Hour 9 Cubic Feet per Day 10 US Million Gallons per Second 11 US Million Gallons per Minute 12 US Million Gallons per...

Page 55: ...5 Cubic Meters 6 Litre 7 Barrel 30951 Time Units Input Register Index 0 to 3 0 Second 1 Minute 2 Hour 3 Day 30961 Echo Confidence Input Register Integer 30963 Confidence Input Register Integer Tech s Menu Value 30964 Direction Input Register Integer Tech s Menu Value 30965 Pot 1 Input Register Integer Tech s Menu Value 30966 Peak to Peak Input Register Integer Tech s Menu Value 30967 Correlation S...

Page 56: ...e module can be customer installed The Thermostat is factory set to turn ON at 40 F 4 5 C and OFF at 60 F 15 5 C Power consumption is 15 Watts ENCLOSURE SUNSCREEN Option SCR Do not mount instrument electronics in direct sunlight Overheating will reduce the life of electronic components and condensate may form during the heat cool cycles and cause electrical shorts ...

Page 57: ...32VDC to the and terminals The Power Input GND terminal must be connected to the nearest Ground pole A 1 amp fuse in line is recommended NO C NC NO C NC 4 20mA RLY2 RLY1 NC C NO NC C NO NC C NO NC C NO RLY3 RLY4 RLY5 RLY6 EXTRA RELAYS OPTION SENSOR GND SERIAL COMMUNICATION OPTION DC GND RS 485 Output G 4 20mA VELOCITY 4 20mA LEVEL DC BLK SENSOR RCVR GND GND TMTR GR N WHT C ORE GND ...

Page 58: ...with English French or Spanish language selection Power Input 100 240VAC 50 60Hz 10VA maximum Optional 9 32VDC 10 WATTS maximum Outputs 3 Isolated 4 20mA 1000 ohm Flow Level and Velocity or 0 5VDC by menu selection Control Relays 2 Relays form C dry contacts rated 5 amp SPDT programmable for flow proportional pulse sampler totalizer flow and or level alarm Data Logging Programmable 6 5 million poi...

Page 59: ...ead 1 in 25 4 mm Maximum Head 15 ft 4 57 m Operating Temperature 5 to 175 F 15 to 80 C Exposed Materials 316 stainless steel epoxy resin polyurethane Sensor Cable 25 ft 7 6 m submersible polyurethane jacket shielded 3 coaxial Sensor Mounting includes MB QZ stainless steel mounting bracket Temperature Compensation Automatic continuous 1 62 41 2 mm 0 56 14 2 mm MB QZ MOUNTING BRACKET QZ02L VELOCITY ...

Page 60: ... 4 57 m Minimum Range 8 203 2 mm Beam Angle 8 Operating Temperature 40 to 150 F 40 to 65 C Exposed Materials Sensor PVC Mounting Bracket 316 Stainless Hazardous Rating Standard Certified non incendive for Class 1 Div 2 Groups A B C D hazardous locations Optional CSA rated Intrinsically Safe Class I Div 1 Groups C D Class II Div 1 Groups E F G with optional Intrinsic Safety Barrier 2 500 20 472 mm ...

Page 61: ...Page 61 AVFM 6 1 Area Velocity Flow Meter Dual Non Contacting Sensor Configuration ...

Page 62: ...NC NO C NC 4 20mA RLY2 RLY1 NC C NO NC C NO NC C NO NC C NO RLY3 RLY4 RLY5 RLY6 EXTRA RELAYS OPTION POWER INPUT HEATER OPTION SENSOR GND SERIAL COMMUNICATION OPTION AC GND RS 485 Output G 4 20mA VELOCITY 4 20mA LEVEL SENSOR RCVR GND GND TMTR CORE GND PZxx Level BLK BLK WHT DOPPLER SENSOR SE 4 ...

Page 63: ...n only Do not clamp sensor body or stem 2 Do not mount sensor or cover flange in direct sunlight 3 Extend sensor cable up to 500 ft 150 m with RG62AU coaxial only and junction box 4 Standpipe diameter as large as possible typical standpipe 6 150 mm diameter 12 16 300 500 mm height Use a Sensor Sunscreen option PZS when sensor is installed indirect sunlight ...

Page 64: ... temporary mounting Apply coupling compound to the coloured face of the sensor A bead similar to toothpaste on a toothbrush is ideal Do not overtighten crush the sensor The sensor must be fixed securely to the pipe with coupling material between the sensor face and the pipe Sensor installation with excessive coupling compound can result in gaps or voids in the coupling and cause errors or loss of ...

Page 65: ...se paint scale and rust The objective of site preparation is to eliminate any discontinuity between the sensor and the pipe wall which would prevent acoustical coupling A PC4 Sensor Mounting Kit is supplied with each Greyline SE4 sensor It includes recommended coupling compound in a plastic applicator and a stainless steel mounting bracket with adjustable pipe straps ...

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