The electromagnetic Flow meter is composed of a sensor and converter, works on Faraday”s electromagnetic indication principle, it has a dual cavity housing providing ease of wiring while isolating the electronics from the environment. LDG series continues the use of low-frequency excitation method and multiform lining allowing this magnetic flow meter to be applied to an even greater range of applications.
- Fast response and high stability.
- High Accuracy, 0.5%, 0.2% for flowrate
- Dual cavity housing to separate electronics part from wiring part.
- AC power supply common use (85~265vac).
- High visible backlit LCD for easy operation.
- Communication: E. G. RS485, RS232C, HART, Profibus, MODBUS etc.
- BI-direction measuring and totalizing
|Model||Q min(m3/h)||Q min(m3/h)||Dn (mm)|
The velocity range is 0.3m/s to 15m/s. The minimum measurable speed can be one percent(1%) of the full range.
Current output: Fully-isolated 0~10mA/4~20mA
Load resistance: O to 1.5k; 4~20mA, 0~750 at 4~20mA
Base error: Add minus 10uA on top of the measurement error
Frequency output is proportional to the flow percentage of the full range. It Provides fully isolated transistor open collector frequency output ranged from 1 to 5000Hz, the external DC power supply should not exceed 35V and maximum collector current is 250mA.
The converter can output up to 5000cp/s pulse series, which is dedicated to external totalization. Pulse factor is defined as pulse width is selectable from 16ms, 33ms, 66mm, and so on. Photo-coupler isolated transistor open collector circuit is used for pulse output. The external DC power supply should not exceed 35V and maximum collector current is 250mA
Showing Flow Direction & Range
The converter is capable of measuring both forward and reverse flow and recognizing its direction. The converter output 0Vlow level for forward flow, while 12V high level for reverse flow. Alarm Output
Two channel of photo-coupler isolated open collector circuit are used for alarm signal output. There are two alarm outputs: High limit alarm and low limit alarm. The external DC power supply should not exceed 35V and maximum collector current is 25OmA
RS232C, RS485, HART, PROFIBUS, MODBUS
The RS232C, RS485, HART, PROFIBUS, MODBUS Communication interface are embedded in the converter. Surge absorber is optional to protect the interface and converter.
Flow rate can be displayed either in engineering units or in percent of span. Totalized volum in any engineering unit can be displayed by setting a totalizing factor.
External contact ON or OFF signal can be used to remotely control the start/stop or reset of internal counter.
Damping time optional from 0.2 to 100s.
Self Diagnostics Function
Converter failure, flow tube failure, erroneous setting, etc. Can be diagnosed and displayed.
Data Security During power Failure:
Data storage by EEPROM-no back-up battery required.
Housing: Stainless steel(SUS304), Carbon steel(SPCC)
Flange: Stainless steel(SUS304) Carbon steel(SS304)
Pipe: Stainless steel(SUS304)
Wetted Part Material
Lining: Rubber, PTFE, PFA
Electrode: Stainless steel(SUS316), Hastelloy B,HastelloyC, Titanium, Tantalum, Platinum
Normal Operating Conditions:
Ambient temperature: -20 to 60
Ambient Humidity: 5 to 95%RH
Power Supply Voltage: 85 to 265VAC
Power Supply Frequency: 47 to 63Hz
Fluid Conductivity: 20Us/cm at least