working principle:
The measuring principle of LDG series electromagnetic flowmeter is Faraday's law of electromagnetic induction. The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell.
It is mainly used to measure the volume flow in conductive liquids and slurries in closed pipes. It includes highly corrosive liquids such as acids, bases, and salts. Electromagnetic flowmeter is widely used in petrochemical, steel metallurgy, water supply and drainage, water conservancy irrigation, water treatment, environmental pollution control, papermaking, medicine, food and other industrial and agricultural sectors of the production process flow measurement and control; suitable for conductive liquids Total amount measurement.
Features:
1. Programmable frequency low frequency rectangular wave excitation improves the stability of flow measurement and low power loss;
2, using 16-bit embedded microprocessor, fast computing speed, high precision;
3, full digital processing, strong anti-interference ability, reliable measurement, high precision, measuring range up to 150:1;
4, ultra-low EMI switching power supply, suitable for a wide range of power supply voltage, good anti-EMC performance
5, full Chinese character menu operation, easy to use, easy to operate, easy to learn and understand;
6, high definition backlight LCD display;
7. It has two-way flow measurement and two-way total accumulation function, and the current and frequency have bidirectional output function;
8. There are three totalizers in the interior to display the forward cumulative amount, the reverse cumulative amount and the difference integrated amount respectively;
9, with RS485 or RS232 digital communication signal output
10, with conductivity measurement function, can determine whether the sensor is empty;
11, the constant current excitation current range is large, and can be used with different types of electromagnetic flow sensors;
12, with self-test and self-diagnosis function;
13, using SMD devices and surface mount (SMT) technology, circuit reliability;
14. The internal design of the instrument has a power-down clock, which can record 16 power-down times.
Technical Parameters:
1. Execution standard: electromagnetic flowmeter (JJG1033-2007)
2. Nominal pass (mm): (special specifications can be customized)
2.1. Pipeline PTFE lining: DN10-DN600 2.2. Pipeline rubber lining: DN40-DN2000
3. Flow direction: positive, negative, net flow range ratio: 150:1
4. Repeatability error: ±0.1% of measured value Accuracy level: 0.5, 1.0
5. Temperature of the measured medium
5.1. Conventional rubber lining: -20～+60°C 5.2. High temperature rubber lining: -20～+90°C
5.3. Polytetrafluoroethylene lining: -30 ~ +120 ° C 5.4. High temperature type PTFE lining: -20 ~ +160 ° C
6. Rated working pressure (high pressure can be customized)
6.1.DN10～DN25≤4.0MPa 6.2.DN32～DN150≤1.6MPa
6.3.DN200～DN600≤1.0MPa 6.4.DN700～DN2000≤0.6MPa
7. Flow rate range: 0.1-15m/s
8. Conductivity range: conductivity of the measured fluid ≥ 5μs / cm
9. Signal output:
9.1.4~20mA (load resistance 0~750Ω), pulse/frequency, control level Communication output
9.2. RS485, 9.3. MODBUS protocol, 9.4. HART protocol
10. Power supply: 220VAC, tolerance 15% or 24VDC, ripple ≤ 5%
11. Requirements for straight pipe length: upstream ≥ 5DN, downstream ≥ 2DN
12. Connection method: flange connection between flowmeter and piping, flange conforms to international: GB/T9113.1-2000
13. Explosion-proof grade: ExdIICT6
14. Protection level: IP65, special order up to IP68
15. Ambient temperature: -25 ~ +60 ° C
16. Relative humidity: 5% to 95%
17. Power consumption: less than 20W