HollySys AF-EMF8E Electromagnetic Energy Meter is based on standard requirement for chilled and hot water energy audit design. It includes high accuracy electromagnetic energy meter, temperature sensors and integrated energy calculator to perform the data collection and processing function, making the measured data available for statistical, monitoring or control purposes. The energy meter and integrated energy calculator for measurement of energy & volume, monitor in heating or cooling system.
Product Features
· Permanent EEPROM to keep configured parameters and measured data
· Support Modbus or BACnet communication protocol
· Support Bluetooth communication tools, easy inspection and maintenance
· Combined heating/ cooling system application
· Operable as a flow meter or cold meter or heat/cold meter
· Can measure the forward / reverse flow rate and cold / heat power
Application Scenarios
AF-EMF8E Electromagnetic Energy Meter are used to measure heat consumption in district heating networks and residential development. It can be used for cold water measurement at the same time (solely or together with heat measurement) and for flow measurement in systems using water as medium.
Technical Parameters
Converter
| Accuracy |
Grade 2 |
| Power supply |
220 V AC/24 V DC |
| Output signal |
4 to 20 mA/passive pulse |
| Communication |
MODBUS/HART/BACnet |
| Protection class |
IP65/IP67 |
Sensor
| Diameter |
DN10 to DN2000 |
| Protection class |
IP65/IP67/IP68 |
| Temperature range |
4 to 95ºC |
| Temperature difference range |
3 to 70 K |
| Temperature measuring element |
PT1000 |
| Connection |
Flange/wafer/threaded/clamp |
| Structure |
Integrated type/split type |
| Material (electrode) |
316L |
| Material (flange) |
Carbon Steel (304/316/316L is optional) |
| Material (enclosure) |
Carbon Steel (304/316/316L is optional) |
| Lining material |
PU/PTFE |
| Grounding element |
Grounding electrode/grounding ring |
| Attachment |
Temperature sensor × 2 |
Working Principle
When the conductive liquid is cutting the magnetic lines in the magnetic field, the ends of conductor will induce electromotive force(E), which is vertical to direction of movement and magnetic field. The electromotive force and the velocity of conductive liquid(V) are in a direct ratio, that is E=BLV (B: magnetic induction strength of the magnetic field; L: conductor length; V: velocity of cutting the magnetic lines).
After the converter has the power, the excitation current drive coils to form the magnetic field in the measuring tube, and when the media flows along the measuring tube and cut the magnetic lines, the induced electromotive force is transmitted to the converter through the two electrodes on the pipe wall. After signal is processed and computed by the converter, and the measured flow
value is converted.
The display shows the measured flow data, and output the data by the way of 4 to 20mA, pulse or RS485.
Company Profile
Audited Supplier 
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