THE METER OF CHOICE
The Cadillac® EMAG Magnetic Flow Meter has been acknowledged as the industry standard for accuracy and electronics innovation.
THE LIQUID METER OF CHOICE
The Cadillac® EMAG magnetic flow meter is a rate and totalizing device, which is capable of measuring liquids of all types and consistency while providing an obstruction free flow path. With a traditional flow tube/coil design the EMAG an economical alternative for those applications where piping straight run or flow profiling is available. With a common electronics platform shared with the CMAG, the EMAG has all the electronics features and options available as standard and an industry standard accuracy of +/- 0.50% of rate or reading. In any conductive liquid application the Cadillac® magnetic flow meter is the number one technology choice due to Cadillac®’s accuracy, linearity, reliability and rangeability
Like many other flow meters, the Cadillac® magnetic flow meter is a velocity measuring device which computes flow by multiplying the effective cross sectional area of the flow meter with the detected fluid velocity. The meter has no moving parts and consists of a meter body with encapsulated coils, electrodes and an amplifier assembly. It detects velocity by measuring an induced voltage that is developed by moving the conductive fluid through a magnetic field.
APPLICATIONS:
- Data Source for energy management system, DCS, district-wide systems.
- Cooling tower Water flow.
- Potable Water flow.
- General industrial and domestic Water flow.
- Industrial and domestic Wastewater flow.
- Aquifer injection Water flow.
- Process Water flow.
- Water based Coolant flow.
- Water based Slurry flow.
- Reclamation Water flow.
- Clarifier Water flow.
FEATURES:
Accuracy
+/-0.5% of the reading for liquids.
High accuracy allows significant improvement in both measurement and customer billing.
Rangeability
Typically 100 to 1 turndown or better.
With seasonal heating/cooling load variation, the need for a large turndown is essential. Cadillac® magnetic flow meters
will accurately measure all load requirements with proper sizing.
Longevity
Mean time between failure (MTBF) of 75 years.
With no moving parts and through simple robust design the meter has unmeasured life expectancy.
Modern Electronics
Meeting the challenges of the next millennium. Meters are equipped with
electronics capable of registering locally, remotely or interfacing with
an energy management system. Built to withstand the toughest conditions.
PRINCIPLE OF OPERATION
Faraday's law states that, when you move a conductor perpendicular through a magnetic field, a voltage will be induced proportional to the velocity of the conductor. A magnetic field is created by a set of coils which are encapsulated and rigidly retained in the meter flow tube and, when a conductive liquid moves through that magnetic field, a pair of electrodes measures the voltage induced by the movement of the liquid. The measurement is independent of conductivity changes in the liquid as long as it remains above the minimum threshold of 5 uS/cm2.
The relationship between the liquid velocity and the induced voltage is expressed in a meter K-factor. The meter K-factor is unique to each and every meter and is documented during a NIST traceable flow test completed prior to shipment. With the K-factor established a highly accurate volumetric flow is calculated by multiplying the cross sectional area of the flow tube by the measured liquid velocity. This volumetric relationship can then be converted to various engineering units and the flow meter converter can then retransmit this information with a 4-20 mA current signal and / or conditioned pulse. An optional integral LCD Indicator/Totalizer is available to locally display and totalize in whatever engineering units prefered.
INSTALLATION
Installation requirements for the Cadillac EMAG are along the line of conventional magnetic flow metes with industry standard for flow profiling or piping straight run.
Employing an industry standard coil design within the flow tube the Cadillac® meter provides an economical alternative for those applications where the CMAG and its unique coil design and focusing plates are not required or necessary for the application.
The electronics for both the CMAG and EMAG are identical and provide high frequency DC square wave signal generation and flow signal sampling. Providing the high reliability and functionality available for a variety of flow applications.
In practice, installation requirements for the EMAG magnetic flow meter follow standard piping straight run requirements, which are listed as follows:
Downstream of the meter:Expander (2-5) diametersTee - (2-5) diameters Elbow - (2-5) diameters Valves - (2-10) diameters |
Upstream of the meter:Expander - (10) diametersTee - (5) diameters Elbow - (5) diameters Valves - (10) diameters |
Unlike other technologies such as the Cadillac® Vortex flow meter, magnetic flow meters do not have a low flow cutoff, essentially allowing the meter to read to zero. With such a wide flow range capability for the technology, most applications can be addressed with meters at full line size.
GENERAL SPECIFICATIONS
- Meter will consist of a full-bore body with encapsulated and rigidly retained set of coils.
- Meter available with remote or integral electronics with indication and totalization.
- Meter operates at + 0.5% accuracy with proper flow profiling or piping straight run.
- Meter available with pulse and analog (4-20 mA) outputs.
- Meter will provide instantaneous and totalized flow available at local indicator or remotely through outputs.
- Meter measures flow using Faraday’s law (Induce voltage is directly proportional to the velocity of the conductive liquid)
- Meter K-factor is stable and not influenced by external piping or mounting orientation.
- Meter will measure fluids with conductivity greater than or equal to 5.0 uS/cm2.
- Meter will have empty pipe detection and contact (DO) available for alarming.
- Meter power supply: 100-240 VAC, 50/60 Hz (Optional 24Vdc). Power consumption approximately 17 Watts.
- Meter will be calibrated to/and be provided with NIST calibration certificate.
FLOW METER SIZING
The Cadillac® EMAG magnetic flow meter has a carbon steel body and is sold with grounding rings as an option. Grounding rings are optional since most heating/cooling water piping systems have relatively high conductivity and consist of metallic piping, which provides adequate grounding for stray currents traveling through the process water. As a consequence, the induced voltage is remarkably free of noise allowing the meter to reliably measure extremely low fluid velocities. The table below lists minimum as well as maximum flow ranges for each meter size in GPM for liquids.
