M2000 – Electromagnetic Flow Meter

The Badger Meter M-Series® M2000 is the result of years of research and field use of electromagnetic flow meter technology. Based on Faraday’s law of induction, these meters can measure almost any liquid, slurry or paste that has minimum electrical conductivity. Designed, developed and manufactured under strict quality standards, the M-Series meter features sophisticated,  processor-based signal conversion with accuracies of ±0.25 percent. The wide selection of liner and electrode materials helps ensure maximum compatibility and minimum maintenance over a long operating period.

Description

Operation: The flow meter is a stainless steel tube lined with a non-conductive material. Outside the tube, two DC powered electromagnetic coils are positioned opposing each other. Perpendicular to these coils, two electrodes are inserted into the flow tube. Energized coils create a magnetic field across the whole 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. The M2000 amplifier receives the detector’s analog signal, amplifies that signal and converts it into digital information. At the processor level, the signal is analyzed through a series of sophisticated software algorithms. After separating the signal from electrical noise, it is converted into both analog and digital signals that are used to display rate of flow and totalization. With no moving parts in the flow stream, there is no pressure lost. Also, accuracy is not affected by temperature, pressure,  viscosity or density and there is practically no  maintenance required.

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. M2000 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. As an option 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 M2000 amplifier can be integrally mounted to the detector or can be remote-mounted, if necessary and has many advantages over other conventional technologies. The meter targets a variety of applications and is well suited for the diverse water and wastewater treatment industry. The M2000 meter 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, magnetic meters are successfully used in industries including food and beverage, pharmaceutical, water and wastewater, and chemical

Features:

  • Available in sizes 0.25…54″ (6…1350 mm)
  • Pulsed DC magnetic field for zero point stability
  • Integral and remote signal converter availability
  • Corrosion resistant liners for long life
  • Measurement largely independent of flow profile
  • User friendly programming procedure
  • Empty pipe detection
  • Power loss totalization
  • Digital signal processor (32-bit)
  • Non-volatile programming memory
  • Rotating cover
  • Calibrated in state-of-the-art facilities
  • NSF listed
  • CSA certified

Additional information

Flow Range

0.10…39.4 ft/s (0.03…12 m/s)

Accuracy

± 0.25 percent of rate for velocities greater than 1.64 ft/s (0.50 m/s) ± 0.004 ft/s (± 1 mm/s) for velocities less than 1.64 ft/s (0.50 m/s)

Repeatability

± 0.1%

Power Supply

AC Power Supply: 85…265V AC; Typical Power: 20V A or 15W; Maximum Power: 26V A or 20W Optional DC Power Supply: 10…36V DC; Typical Power: 10W; Maximum Power: 14W

Analog Output

4…20 mA, 0…20 mA, 0…10 mA, 2…10 mA (programmable and scalable)
Voltage sourced 24V DC isolated. Maximum loop resistance < 800 ohms

Digital Output

Four total, configurable 24V DC sourcing active output (up to 2),100 mA total, 50 mA each; sinking open collector output (up to four), 30V DC max, 100 mA each; AC solid-state relay (up to 2), 48V AC, 500 mA max

Digital Input

Max 30V DC (programmable – positive zero return, external totalizer reset or preset batch start)

Frequency Output

Scalable up to 10 kHz, open collector up to 1 kHz, solid-state relay

Misc Output

High/low flow alarm (0…100% of flow), error alarm, empty pipe alarm, flow direction, preset batch alarm, 24V DC supply, ADE

Communication

RS232 Modbus RTU; RS485 Modbus RTU, HART, Profibus DP require separate daughterboards

Pulse Width

Scalable up to 10 kHz, passive open collector up to 10 kHz, active switched 24V DC. Up to two outputs (forward and reverse). Pulse width programmable from 1…1000 ms or 50% duty cycle.

Processing

32-bit DSP

Empty Pipe Detection

Field tunable for optimum performance based on specific application

Excitation Frequency

1 Hz, 3.75 Hz, 7.5 Hz or 15 Hz (factory optimized to pipe diameter)

Noise Dampening

Programmable 0…30 seconds

Low Flow Cut-Off

Programmable 0…10% of maximum flow

Galvanic Separation

250V

Fluid Conductivity

Minimum 5.0 micromhos/cm

Fluid Temperature

With Remote Amplifier: PFA, PTFE & Halar 302° F (150° C) With Meter-Mounted Amplifier: Rubber 178° F, (80° C), PFA, PTFE & Halar 212° F (100° C)

Ambient Temperature

– 4…140° F (–20…60° C)

Relative Humidity

Up to 90 percent non-condensing

Flow Direction

Unidirectional or bidirectional two separate totalizers (programmable)

Totalization

Programmable/resettable

Units of Measure

Ounce, pound, liter, US gallon, imperial gallon, barrel, hectoliter, mega gallon, cubic meter, cubic feet, acre feet

Display

4 x 20 character display with backlight

Programming

Three-button, external manual or remote

Amplifier Housing

Cast aluminum, powder-coated paint

Detector Housing

Carbon steel welded

Pipe Spool Material

316 stainless steel

Flanges

Standard: ANSI B16.5 Class 150 RF cast steel; Optional: 300 lb cast steel, 316 stainless steel

Liner Material

PFA up to 3/8", PTFE 1/2…24", soft and hard rubber from 1…54", Halar® from 14…40"

Electrode Materials

Standard: Alloy C; Optional: 316 stainless steel, gold/platinum plated, tantalum, platinum/rhodium

Mounting

Meter mount or remote wall mount (bracket supplied)

Locations

Indoor and outdoor

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)

Cable Entries

1/2" NPT cord grip (3)

Optional Stainless Steel Grounding Rings

Meter Size Thickness (of one ring)
Up through 10" 0.135"
12…54" 0.187"

NSF Listed

Models with hard rubber liner, 4"size and up; PTFE liner, all sizes

Token Features

Data Logging (Blue token); Store/Restore (Red token); Firmware Upgrade (Black token)

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