Specifications_for_MagFlux.pdf

SECTION

ELECTROMAGNETIC FLOW MEASURING SYSTEM

Electromagnetic Flow Meter

A. Manufacturers

1. The electromagnetic flow meter shall be an MJK MagFlux system with MJK Magflux Flow Sensor, MJK MagFlux Flow Converter and MJK MagFlux Display Unit with manufacturer recommended accessories.

System Description

1. The electromagnetic flow measurement system shall consist of a Flow Sensor which uses Faradays law of electromagnetic induction along with a microprocessor based Flow Converter and Display.

2. The flow meter shall have built in self-diagnostics, technician service functions and be suitable for use with the manufacturer’s system certifying kit to confirm meter’s sensor functions, accuracy of electronics including a calibration check of electronics at a zero flow and a mid-range flow rates, and for confirming all components meet factory specifications for accuracy and feature operation.

Flow Sensor

1. Operating Principle: Utilizing Faraday’s Law the sensor converts the liquid flow through the sensor into electrical voltage proportional to the velocity of the flow.

2. Construction: The senor shall be produced from 304 stainless steel pipe, coils, 316L stainless steel electrodes and a hard rubber liner, soft rubber liner, or PTFE liner as required for compatibility with the media. The sensor shall have a stainless steel outer jacket or carbon steel outer jacket, carbon steel or stainless steel ANSI 150 psi or optionally ANSI 300 psi, ANSI Class D or ANSI Class E flanges. Carbon steel exterior components as well as the exterior of the flow tube shall be protected with two part epoxy coating for corrosion resistance.

3. Installation: A minimum of 3 pipe diameters up stream and 2 pipe diameters down stream of straight smooth pipe are recommended. (Consult Factory for any variations.)

4. Flow Sensor Operating Temperature shall be: Media Temperature -10ºC to 80ºC (15ºF to 175ºF), Ambient Temperature 10ºC to 60ºC (15ºF to 140ºF).

5. Flow Sensor Sizing shall conform to the manufacturer’s sizing recommendations for the expected flow rates per the table below:

6. Flow Sensor shall be capable of being installed for permanent burial or submergence up to 30 ft. (IP 68/NEMA 6P) using manufacturer’s submergence and waterproofing kits. Flow sensor shall be capable of temporary (30 minutes) submergence up to 3 ft. (IP 67/NEMA

4) without a submergence kit.

7. Flow Sensor shall be full bore internal diameter throughout to reduce liner erosion and reduce turbulence at high flow ranges.

8. Flow Sensor shall be factory calibrated and wet tested to deliver ±0.25% reading accuracy when the flow sensor is sized so that velocity through the sensor is 0.2-10m/s. Accuracies will be NIST Traceable.

9. Flow Sensor shall be delivered with a calibration certificate for verification of performance.

10. The Flow Sensor shall have calibration and flow set up data marked on the sensor.

11. No tools or instruments shall be required to enter or confirm calibration data during set-up.

12. The Flow Sensor shall have no electronic components except the electrodes and coils.

13. Flow Sensor shall be capable of operating in 100% humidity on a permanent basis with manufacturer’s recommended gel potting.

14. Flow sensor shall be capable of being mounted at angles up to 45º from vertical around the center axis of a horizontal pipe.

15. Flow Sensor shall be capable of being installed in any direction without regard to flow direction.

16. The Flow Sensors 316L electrodes shall be lobed so as to create a scouring effect with flow through the tube.

17. The Flow Sensor shall also include a grounding electrode to eliminate the need for grounding rings in wastewater applications (except when using non-conducting pipe).

Flow Converter

1. Flow Converter shall be have an enclosure rating of IP 67 (NEMA 6)

2. Flow Converter shall have a measurement accuracy of ±0.1%

3. Flow Converter shall energize and detect signals generated at the Flow Sensor electrodes and self-adjust frequency and amplitude to maximize accuracy across a wide range of flow velocities.

4. Flow Converter shall include program for periodic self-cleaning of Flow Sensor electrodes using cyclic reverse polarization systems to prevent material attachment and to detach plated materials.

5. Flow Converter shall be capable of measuring fluid velocities in low ranges from 0 to 0.2m/S (0.6ft/sec.) and up to a maximum velocity up to 10m/s (30ft/sec).

6. Maximum accuracies shall be achieved from 2% of the flow sensors maximum flow rate up through the sensors maximum flow rate

7. Flow Converter shall be a flow rate transmitter with a fully scaleable 4-20mA output proportional to all or part of the full-scale flow rate and capable of transmitting with a maximum line load of 800 Ω.

8. The Flow Converter shall be capable of transmitting a 4-20mA output proportional to the flow in either direction, or 4-20 mA proportional to flow in both directions, selectable after installation.

9. Flow Converter shall have one voltage free electromechanical relay rated for a maximum of 50VDC at 1 Amp and one optically isolated relay rated for 50VAC/VDC 120mA max. Both relays are programmable for totalizer counter output, batch counters, high/low flow alarm, system error, empty pipe alarm, and flow direction indication.

10. The Flow Converter shall accept one external digital input rated at a maximum of 30VDC with a signal less than 5VDC registered as = 0 and a signal greater than 10 VDC as registered as = 1. Minimum pulse length 100ms. Digital input can be used for reset of batch counters, start and stop batches or alarm acknowledgement.

11. The Flow Converter shall be capable of reading flow in both directions and have three re-settable totalizers and three non-resettable totalizers capable of totalizing the total flow or net flow in both directions.

12. The Flow Converter shall have two batch counters utilizing dynamic adaptive batch counting to minimize under shooting and over shooting of batch volume by self-adjusting the batch cycle based on actual batch size measurement results.

13. Flow Converter shall have a MODBUS RTU-mode for control and communication using either the MJK MagFlux Display unit or for communication with a PLC. The manufacturer shall supply a document with the list of program registers upon request.

14. Flow Converter shall use an RS 485 communication interface capable of transmitting up to 3000 ft. the controls and data in the MODBUS RTU mode to a PLC or MJK Display Unit.

15. Flow Converter shall be capable of operating without a display, with a remote display, with an integral display or as a member of a group of two to four converters working from a single display.

16. Flow converter shall be capable of being operated remote to the Flow Sensor.

17. Converter shall have CE conformance for radio signal input and output immunity.

18. Flow converter shall have user adjustable low flow cut off for automatic zeroing of flow rate, totalizing and mA output. No external switching shall be required to achieve zero flow.

19. Flow Converter dimensions with cover or display unit attached shall not exceed 6.4” W x 5.9”H x 3.5”D

20. Flow Converter and must be capable of interchanging with any other flow sensor from the same manufacturer, without the use of electronic memory media exchange.

21. Flow Converter must be capable of being remote mounted up to 150 ft from the flow sensor and require only one set of communication cabling to the sensor for operation.

Display Unit

1. Display Unit shall be a white dot matrix 64 x128 pixel graphic backlit display.

2. Display Unit shall allow up to four lines of customizable text with automatic font scaling allowing maximum size up to ½ an inch for the primary measurement parameter.

3. Display Unit shall indicate flow, flow direction, volume, totalizers, configuration, and set-up operations in plain English text.

4. The Display Unit shall display a graphical trend line of the flow history which can be expanded to show greater detail down to 5 minutes increments of flow rates.

5. The Display Unit shall collect 160,000 flow data points with date and time at user specified time intervals, and data log daily flow totals.

6. The Display Unit shall communicate with the Flow Converter using a MODBUS RTU mode using RS485 communications on standard twisted wires for distances up to 3000 ft.

7. The Display Unit shall be capable of controlling, configuring, and data logging for up to four Flow Converters and flow sensors at the same time with simultaneous displays of measurements.

8. The Display unit shall also have options for Modbus or Profibus data transmission in addition to the Converter communications modes.

9. The Display Unit shall hold all settings in a flash memory in the event of a power outage.

Battery back-up is not acceptable.

10. The Display Unit shall have a USB port for connection or options for BlueTooth communication to a personal computer for downloading data in CSV file types suitable for use with commonly available spreadsheet and data management software. The USB port shall also be capable of letting the operator store all flow meter settings as a file on a PC, configure the flowmeter converter from a PC, upload software updates, and upload standard configurations.

11. The Display Unit shall be able to be remote mounted up to 3000 feet from Flow Converters.

12. The Display Unit shall have four keypad buttons for configuration and operation by the user and for use as a digital input for control.

13. The Display unit shall be capable of showing ‘pop-up’ alarm messages which shall persist as long as the alarm condition exists and will disappear 5 minutes after.

C. Materials:

1. All instruments and sensors shall be supplied by one manufacturer to ensure consistent fit and system-wide functioning.

2. Provide:

a. Flow Sensor compatible with flow rate and media.

b. Flow Converter capable of converting conductive liquid velocity signal into flow rate and transmitting proportional signal, totalizing signal and relay signals.

c. Display Unit capable of displaying all measurements and set-up functions, and capable of providing data logging functions and program uploads.

d. Provide MJK MagFlux Electromagnetic Flow Meter System and recommended spare parts

3. OPERATOR FUNCTIONS

a. Calibration shall be by registering the Flow Sensor’s serial number to the Flow Converter by keying it into the Display Unit.

b. System shall start-up and accurately measure immediately after Flow Sensor registration.

c. Operator shall use the integral keypad on the Display unit to program relays for error alarms, limit alarms, totalizer output, batch control output, digital inputs and all operating parameters and variables.

d. Operator shall use an alarm re-set to manually cancel alarm messages.

e. The flow meter shall have built in self-diagnostics, technician service functions and be suitable for use with a system certifying kit to confirm meter’s sensor functions and accuracy of electronics including a calibration check of electronics at a zero flow and a mid-range flow rate for confirming all components meet factory specifications for accuracy and feature operation.

4. Warranty

a. The Manufacturer of the Electromagnetic flow meter shall guarantee for one year of operation that the equipment shall be free from defects in design, materials and workmanship.

b. Manufacturer shall, at no cost to the owner, repair or replace any component that is proven to have failed during the warranty period due to a manufacturing defect.

5. Installation

a. The Flow Meter system shall be installed according to the manufacturer’s recommendations and with adherence to all required safety considerations.