M5000 – Electromagnetic Flow Meter

Designed, developed and manufactured under strict quality standards, the M-Series M5000  electromagnetic meter features sophisticated, processor-based signal conversion with accuracies of ± 0.50%. Based on Faraday’s Law of Induction, these meters can measure potable water, reclaimed water, ground water and clear, water-based applications that have minimal electrical conductivity. The flow meter is a stainless steel tube lined with a non-conductive material. Outside the tube are two DC powered electromagnetic coils positioned opposite each other. Perpendicular to the coils are two electrodes inserted into the flow tube. The energized coils create a magnetic field across the diameter of the pipe. As a conductive fluid flows through the magnetic field, a voltage is induced across the electrodes. This voltage is proportional to the average flow velocity of the fluid and is measured by the two electrodes. This induced voltage is then amplified and digitally processed by the converter to produce an accurate analog or digital signal. The signal can then be used to indicate flow rate and totalization, or to communicate to remote sensors and controllers. In addition, the processor controls zero-flow stability, frequency outputs, serial communications, and other parameters. With no moving parts in the flow stream, there is no pressure loss. Also, accuracy is not affected by temperature, pressure, viscosity or density and there is practically no  maintenance required.

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Description

Electrodes: When looking from the end of the meter into the inside bore,  the two measuring electrodes are positioned at three o’clock and nine o’clock. M5000 mag meters have an “empty pipe detection” feature. This is accomplished with a third electrode positioned in the meter between twelve o’clock and one o’clock. If this electrode is not covered by fluid for a minimum  five-second duration, the meter will display an “empty pipe detection” condition, send out an error message, if desired, and stop measuring to maintain accuracy. When the electrode again becomes covered with fluid, the error message will disappear and the meter will continue measuring. The wide selection of liner and electrode materials helps ensure maximum compatibility and minimum maintenance over a long operating period. The M5000 amplifier can be integrally mounted to the detector, or if necessary, mounted remotely. The amplifier is housed in a NEMA 4X (IP66) enclosure. OPERATION In addition to using grounding rings, a grounding electrode  (fourth electrode) can be built into the meter during manufacturing to assure proper grounding. The position of this electrode is at five o’clock.

Application: The M5000 mag meter is designed for applications without power line access, where flow is continuous, and when indication of rate and totalization are required. The M5000 can accurately measure fluid flow—whether the fluid is water or a highly corrosive liquid, very viscous, contains a moderate amount of solids, or requires special handling. Today, electronic meters are successfully used in industries including potable water, reclaimed water, food and beverage, pharmaceutical and chemical.

Features:

  • Available in sizes 0.50…24 in. (15…600 mm)
  • Battery powered
  • ± 0.50% accuracy independent of fluid viscosity, density and temperature
  • Unaffected by most solids contained in fluids
  • Pulsed DC magnetic field for zero point stability
  • No pressure loss for low operational costs
  • Corrosion resistant liners for long life
  • Calibrated in state-of-the art facilities
  • Integral and remote signal converter availability
  • Optional grounding rings or grounding electrode
  • Measurement largely independent of flow profile
  • Low-power digital microcontroller (16 bit)
  • Simple programming procedure
  • Digital and infrared outputs
  • Automatic zero-point stability
  • Non-volatile programming
  • NSF listed
  • Data logging

Additional information

Flow Range

0.1…32.8 ft/s (0.03…10 m/s)
Accuracy

± 0.50 % rate for velocities greater than 1.64 ft/s (0.50 m/s),
± 0.008 ft/s (± 0.0025 m/s) for velocities less than 1.64 ft/s (0.50 m/s)
Minimum Fluid Conductivity

≥ 20 micro siemens/cm
Pressure Limits

Maximum allowable non-shock pressure and temperature ratings for steel pipe flanges, according to American
National Standard ANSI B16.5.
Examples: 150-lb flange, rated 285 psi at ambient temperature; 300-lb flange rated 740 psi at ambient temperature
Fluid Temperature

With Remote Amplifier:
PTFE 302° F (150° C),
Hard rubber 178° F (80° C)

With Meter-Mounted Amplifier:
PTFE 212° F (100° C),
Hard rubber 178° F (80° C)
Ambient Temperature

– 4…140° F (–20…60° C)
Flow Direction

Uni-directional or bi-directional. Two separate programmable totalizers for uni-directional measurement
Outputs (4 digital)

Galvanically isolated open collector, 30V DC maximum, 20 mA each, maximum output frequency at 100 Hz
Outputs

ADE, High/low flow alarm (0…100% of flow), error alarm, empty pipe alarm, flow direction
Communication

RS232 Modbus RTU, IrDA
Empty Pipe Detection

Field-tunable for optimum performance based on specific application
Min-Max Flow Alarm

Programmable outputs 0…100% of flow
Low Flow Cut-Off

Programmable 0…10% of maximum flow
Galvanic Separation

Functional 50 volts
Pulse Width

Programmable 5…500 ms
Coil Power

Pulsed DC
Repeatability

± 0.1%
Sampling Rate

Programmable from 1 to 63 seconds. Standard sampling period is 15 seconds
Display

Two lines x 15 characters (7 on top + 8 on bottom), LCD display
Programming

Three external buttons
Units of Measure

Gallons, ounces, MGD, liters, cubic meters, cubic feet, imperial gallon, barrel, hectoliter and acre feet
Battery Life

10 years
Power Supply

Internal lithium batteries 3.6 volt
Processing

Low power microcontroller (16 bit)
Amplifier Housing

NEMA 4X (IP66), cast aluminum, powder-coated paint
Meter Housing Material

Standard: Carbon steel welded
Pipe Spool Material

316 stainless steel
Flanges

Standard: ANSI B16.5 Class 150 RF Cast steel; Optional: 316 stainless steel & 300 lb cast steel
Liner Material

PTFE 0.5…24 in. , Hard rubber 1…24 in
Electrode Materials

Standard: Alloy C; Optional: 316 stainless steel
Mounting

Detector-mount or remote wall mount (bracket supplied)
Meter Enclosure Classification

NEMA 4X (IP66); Optional: Submersible NEMA 6P (IP67)-remote amplifier required
Junction Box Enclosure Protection

For remote amplifier option: Powder coated die-cast aluminum, NEMA 4 (IP66)
NSF Listed

Models with hard rubber liner 4 in. size and up; PTFE liner, all sizes.
Cable Entries

1/2 in. NPT Cord Grip
Optional Stainless Steel Grounding Rings

Meter Size
Up through 1 in. 0.135 in.

Thickness (of 1 ring)
12…24 in. 0.187 in.

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