DWYER INSTRUMENTS, INC.
Contents
1. BFM BFS Series BFM Bulk Flow Monitor provides effective monitoring for most flow no flow conditions in pipes and chutes It s sensing techniques which use a Piezo element makes the BFM versatile for most flow no flow applications The BFM Control offers many unique advance features that exceed the industry standards The BFM Central Processing Unit monitors movement of almost anything through a pipe or chute system The BFM is ideal for sensing the presence or absence of materials in Pneumatic Conveying Systems The BFM offers adjustable sensitivity depending on the application demand Also it provides easy installation and requires no maintenance The unit has L E D indicators flow green no flow red The BFS 1 Sensor yields many advance features It externally mounts to the outside of the pipe or chute It provides mounting tabs for easy installation The Sensor Is prewired with 3 wire Series BFM has many practical applications You can use it to monitor Oil Spray Systems Discharge Chutes Distributors Screw Conveyors Drag Conveyors Water Systems Air Systems Pneumatic Systems Gravity Feed Systems Slurry Systems Chemical Processing Food Processing and Rotary Drums Bulletin FL 1 BFM Series BFM Bulk Flow Monitor Specifications Installation and Operating Instructions 4x 3 4 CONDUIT KNOCKOUTS PRODUCT LABEL FOR MAIN CONTROLLER UNIT 2 3o 2 29 WIRE FLOW SENSOR SENSITIVITY ADJUSTMEN2. Fig 9 TTL logic output e RS232 logic output TTL LOGIC OUTPUT The TTL Logic output is a 5VDC output To obtain a TTL Logic Output install jumper J 3 as indicated on the BFM PCB Connect logic level output wiring to the Out 5V terminal and the Sensor OV terminals on TB1 NO FLOW Red LED lights and OVDC will be present at the OUT terminal e FLOW Green LED will light and 5VDC will be present at the OUT terminal RS232 LOGIC OUTPUT The RS232 output is an industry standard 5VDC minimum into 3K load To obtain an RS 232 logical output do not install jumper J 3 as indicated on BFM PCB NO FLOW Red LED lights and 0 VDC will be present at the OUT terminal FLOW Green LED will light and 5VDC min will be present at the OUT terminal NOTE For proper logic input to your computer consult your computer manual for the correct pin configuration for RS232 or TTL RELAY OUTPUT WIRING Relay CTR1 Contact Specifications 4 amp at 125 or 250 VAC 1 10 HP at 125 or 250 VAC 3amp at 30 VDC Relay Output Wiring on TB2 Fig 10 COM Common contact e N C Normally closed e N O Normally open Figure 10 SOUNDING AN ALARM TO INDICATE DECREASED FLOW An alarm will sound when flow drops below the preset amount Fig 11 When flow drops the relay contacts close to energize the alarm The power to the alarm connected to the COM terminal is from the motor sta
3. T POTENTIOMETER BFM FLOW MONITOR SPECIFICATIONS BFM Specifications Service Solids and liquids Power Requirement 120VAC 220VAC or 12VDC Power Consumption 1A Temperature Limits 120 F 48 9 C Output Relay SPDT rated 4A 125 250VAC 1 10 HP 125 250VAC 3A 30VDC TTL 0 5 V Serial Communications RS 232 Electrical Connection Screw Terminal Conduit Connection Knockouts two 3 4 for power three 1 2 for sensor and outputs Enclosure Rating NEMA 4 Material Polycarbonate Weight 3 Ibs 1 36 kg BFS Specifications Pipe Size 1 2 to 60 1 27 to 152 4 cm Enclosure Rating NEMA 4 Electrical Connection 3 0 9 m of 18 gauge wire Temperature Limits 155 F 68 3 C Materials PVC Type 1 Grade 1 Grey Weight 5 oz 141 8 g Part Number Descriptions Control Unit NEMA 4X Polycarbonate Housing Weatherproof 120VAC Control Unit NEMA 4X Polycarbonate Housing Weatherproof 220VAC Control Unit NEMA 4X Polycarbonate Housing Weatherproof 12VDC Sensor DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Phone 219 879 8000 Fax 219 872 9057 www dwyer inst com e mail info dwyer inst com BFM WIRING The BFM polycarbonate housing comes with 10 PG conduit knockouts in the housing e High voltage inputs above 24 volt AC should be routed into the housing through the 3 4 20mm conduit hole All Low voltage wiring TTL RS232 and sensor should be rout
4. d sensitivity for the application WARNING TO AVOID ELECTRICAL SHOCK DISCONNECT AC SUPPLY VOLTAGE BEFORE ADDING OR REMOVING J UMPERS ON TB1 Minimum low range Install jumper J 2 only Medium range No jumpers installed as shipped from factory e Maximum high range Install jumper J 1 only ADJ USTING THE SENSITIVITY RANGE NOTE The sensitivity range is factory preset to the Medium range no jumpers installed Verify that the supply voltage and the flow sensor are wired and installed correctly prior to test ing Fig 14 After selecting proper sensitivity range proceed to the next calibration section 1 With no material flowing turn the Sensitivity adjustment to full clockwise position e RED LED will turn on 2 Start the material flowing at the full rate you wish to moni tor e lf the GREEN LED turns on then turn the Sensitivity adjust ment fully counterclockwise If that causes the RED LED to turn on then the correct sensitivity range is selected If that does not cause the RED LED to turn on Green stays lit then install jumper J 2 Minimum range and repeat the test begin ning with step 1 If the GREEN LED does not turn on when material is flow ing then install jumper J 2 Maximum range and repeat the test beginning with step 1 Figure 14 BFM CALIBRATION Perform sensitivity range jumper selection before performing calibration 1 Stop all material from flowing 2 Turn th
5. e Sensitivity adjustment fully clockwise 3 Start material flowing at the minimum full flow rate desired GREEN L E D will light to indicate FLOW 4 Turn the Sensitivity adjustment counter clockwise until the RED LED lights to indicate NO FLOW 5 Turn the Sensitivity adjustment clockwise very slowly until GREEN LED lights to indicate FLOW 6 Calibration is now complete FINAL SYSTEM CHECK Stop or reduce flow of material and the GREEN LED FLOW will go out and the RED LED NO FLOW will light MAINTENANCE Upon final installation of the Series BFM Bulk Flow Monitor no routine maintenance is required A periodic check of system calibration is recommended The Series BFM is not field serviceable and should be returned if repair is needed field repair should not be attempted and may void warranty Be sure to include a brief description of the problem plus any relevant application notes Contact customer service to receive a return goods authorization number before shipping Copyright 2008 Dwyer Instruments Inc Printed in U S A 12 08 FR R2 443673 00 DWYER INSTRUME NTS INC Phone 219 879 8000 www dwyer inst com P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Fax 219 872 9057 e mail info dwyer inst com
6. ed through the 1 2 14mm conduit hole 3 4 HIGH VOLTAGE INPUT 1 2 LOW VOLTAGE INPUT Figure 1 HIGH VOLTAGE INPUTS Connect the 120VAC 50 60 HZ 1 Amp supply on TB2 terminals Fig 2 e 120VAC Hot supply to 117VAC terminal or 12VDC 240VAC per the model AC Common to AC COM terminal Earth Ground to E GND terminal Must connect to prevent accidental electrical shock A 1 Amp fuse is located next to the transformer Figure 3 SENSOR INPUTS Connect the low voltage Flow Sensor to the Sensor terminals TB1 Fig 4 Positive RED or White sensor lead to the Sensor terminal on TB1 e Negative BLACK sensor lead to the Sensor terminal on TB1 The sensor wiring should be a minimum of 18 AWG strand ed 2 conductor cable Use 18 AWG for up to 500 155m and 16 GA up to 2000 620m All Sensor wire splices must be SOLID and WATER TIGHT RELAY AND LOW LEVEL LOGIC WIRING S ee those sections later in this manual SENSOR INSTALLATION The BFS 1 sensor is in very a rugged polymer housing with a sealed 6 cable pigtail Fig 5 e Red Black Positive White Black Negative this is electrically connected to the metal sensor stud BFM SENSOR BLACK LEAD RED WHITE LEAD Figure 5 MOUNTING PROCEDURES FOR SENSOR The BFS 1 Sensor can be screwed clamped or strapped in place and is able to detect flow through most sheet metal Clean the surface area where the senso
7. r Is to be installed The surface should not have any buildup or scale but does be perfectly clean The sensor stud located at the bottom of the sensor housing must make solid contact with the surface of the pipe to be monitored MOUNTING TO A FLAT SURFACE Refer to the mounting holes located at each end of sensor housing Fig 6 Mark mounting holes Drill pilot holes for mounting screws e Screw sensor housing to flat surface SIDE VIEW FRONT VIEW O NOTE PILOT HOLES BFM ARE DRILLED INTO BFM SENSOR FLAT SURFACE AND SENSOR MOUNTED WITH PORPER HARDWARE ol Figure 6 MOUNTING TO A ROUND OR NON FLAT SURFACE FIG 7 Using strapping such as heavy duty wire ties or clamps to secure the sensor housing to the pipe so the metal sensing stud makes firm contact with the surface SIDE VIEW FRONT VIEW a F BFM NOTE STRAPS BFM SENSOR OR CLAMPS SENSOR ARE USED FOR MOUNTING TO NON FLAT mm Figure 7 SENSOR LOCATION TO ENHANCE SENSITIVY INSTALL THE SENSOR WHERE THE FLOW IS MOST TURBULENT OR WHERE MATERIAL IMPACTS THE PIPE WALL THE FOLLOWING POINTS ARE IDEAL FIG 8 Pipe elbow Point where material drops into spouting or chutes Point where material drops from conveyor onto the chute BE SURE SENSOR STUD IS MAKING A GOOD TIGHT CONTACT WITH r MOUNTING SURFACE STUD SENSOR gt INPUT Figure 8 LOW LEVEL LOGIC OUTPUT WIRING Low level outputs available
8. rter circuit so the alarm can only sound when the motor is running When the motor Stop button is pressed the alarm will silence START MACHING oe SUPPLYING MOTOR MATERIAL STARTER a COM N O NOTE AUXILLARY SET OF 117VAC N C NORMALLY CLUSED ALARM CONCACTS CLOSED WHEN AC COM STARTER IS ENERGIZED Figure 11 SHUTTING DOWN EQUIPMENT WHEN FLOW DECREASES Equipment shut down mode is required if the flow rate drops below the preset level The relay is often wired to stop the equipment that is supplying the material Fig 12 and 13 START STOP STARTER ails COIL NORMAL STARTER CIRCUIT Figure 12 Before the controlled equipment can be started again the following must occur Material is flowing pastthe BFS 1 sensor The Green L E D FLOW indicator light is lit indicating material flow You may have to hold down the Start button until flow reaches the preset rate As long as material continues to flow pastthe BFS 1 sensor above the preset rate the machine eguipment supplying mate rial will continue to run If the rate of material flow falls below the preset level the relay will open and the machine eguip ment supplying the material will stop TART STOP 3 es STARTER COIL TB2 COM N 0 M C 9TARTER CIRCUIT WITH BFM SHUTDOWN Figure 13 SENSITIVITY RANGE ADJ USTMENT AND CALIBRA TION The BFM has 3 three sensitivity range inputs Select the range to get the desire
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