Overview

ABDT-LD series low conductivity electromagnetic flowmeter is a liquid measuring instrument specially used for measuring low conductivity media (conductivity ≥ 4.5μs/cm) , suitable for the flow measurement of various acid and alkali solutions, clear water, sea water and food grade liquid. It is widely used in industrial production process control, energy measurement, environmental protection and sewage treatment. It can output (4~20) mA current signal, pulse signal, etc.. It is coupled with the display, recording instrument, accumulation operator or regulator for flow detection, product calculation, adjustment and control.

Characteristics

ABDT-LD series low conductivity electromagnetic flowmeter has the following characteristics:

● It is not affected by changes in fluid density, viscosity, temperature, pressure and electrical conductivity. The linear measurement principles can achieve high precision measurements;

● No flow parts in measuring pipe, small pressure loss and low straight pipe section requirement;

● The nominal diameter DN15-DN600 covers a wide range,lining and electrodes that meet the requirements of measuring a variety of conductive fluids;

● The converter adopts programmable low frequency rectangular wave excitation, which improves the stability of flow measurement and small power loss;

● The converter adopts a 16-bit embedded microprocessor with full digital processing, fast operation speed, strong interference resistance, reliable measurement, high accuracy and flow measurement range up to 1500:1;

● High definition backlight LCD display, full Chinese character menu operation, easy to use, easy operation, easy to learn and easy to understand;

● RS485 digital communication signal output;

● It has the conductivity measurement function, which can determine whether the pipe of the sensor is fully filled, and has the self-inspection and self-diagnosis function;

● It uses SMD devices and surface mounting (SMT) technology with high circuit reliability;

● It can be used for the corresponding explosion-proof occasions.

Use environmental conditions

Ambient temperature: sensor (-25~+60) ℃; converter (-20~+ 60) ℃

Relative temperature: (5~85)%RH

Working conditions

Maximum fluid temperature: integrated type  ≤ 70℃

Separated type: PTFE lining   ≤ 80℃

Polyneoprene lining   ≤ 65℃   

High temperature rubber   ≤ 120℃

Polyurethane rubber lining   ≤ 60℃

PFA lining   ≤ 150℃

F46 lining   ≤ 110℃

Fluid conductivity   ≥ 5uS/cm

Product composition

The electromagnetic flowmeter consists of two parts: electromagnetic flow converter and electromagnetic flow sensor. 

Product type

When used to measure the low conductivity media, the ABDT-LD series electromagnetic flowmeter is only the integrated type. It can be used in the specified explosion-proof places.

The sensor is available with electrodes of seven different materials and a lining of six different materials.

Technical Performance Indicators of the Product

1. Execution standard: JB/T9248-2015

2. Maximum flow speed: 15m/s

3. Nominal general diameter: DN10,15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600,700,800,1000,1200,1400,1600

4. Precision: 0.5%

5. Nominal pressure: (1.0, 1.6, 2.5, 4.0) MPa, Other specifications and standards may be subject to the user requirements.

6. Materials: electrode form and material

Electrode form can be divided into standard type, scraper type, removable type and the grounding electrode.

The electrode and grounding electrode materials are 7 kinds of 316L stainless steel, harden alloy B, harden alloy C, titanium, tantalum, platinum alloy, stainless steel coated with tungsten carbide.

Flange material: carbon steel, stainless steel (optional)

Grounding ring material: stainless steel

Door protection ring material: stainless steel, carbon steel.

7. Shell protection

IP65

8. Explosion-proof standards:

Explosion-proof grade: ExdmbIIC T6 Gb

9. Converter performance

Power supply: single-phase AC power (85-265) V, (45-63)Hz, power is less than 20W; DC power supply (11-40) VDC.

Converter display and programming operation: 4 film keys can set all parameters and can also program the converter by using foreign receiver or PC machine (RS485, RS232), high definition backlight LCD display, empty pipe detection and self-diagnosis function.

Digital communication: RS485, RS232, MODBUS and REMOTE, with lightning protection.

Output signal

Current output: two-way circuit, full isolation (0-10) mA/(4-20)mA; load resistance: (0-10) mA, (0-1.5) KΩ; (4-20)mA , (0-750) Ω.

Frequency output: forward and reverse flow output, the upper limit of output frequency can be set in the range of (1-5000) HZ. Transistor collector is with photoelectric isolation output in both directions. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on.

Pulse output: forward and reverse flow output, output pulse up to 5000cp/s. Pulse equivalents are 0.001L-1.0m3/cP. Pulse width is automatically set to 20ms or square wave. Open collector output of transistor with photoelectric isolation. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on.

Flow direction indication output: this flowmeter can measure fluid flow in positive and negative direction. The direction of the fluid flow can also be judged.High level of output + 10V for displaying forward flow, and low level of 0V for reverse fluid flow output.

Alarm output: two transistor collector open circuit alarm output with photoelectric isolation. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on. Alarm state: fluid air pipe, excitation line break, flow over limit.

Damping time: 0s-100s, optional

Electrode material selection

Lining material selection

Outline size

Outline and installation size of the electromagnetic flow sensor (in mm)

Installation precautions

Keep a long enough straight pipe section upstream and downstream of the electromagnetic flow sensor (D is the sensor diameter) as required in the figure below.

Product Type Selection

Liquid Flow and Velocity Table