EMF coal water slurry flowmeter

Overview

EMFThe liquid slurry electromagnetic flowmeter is a specialized electromagnetic flowmeter for measuring slurry media such as coal water slurry, pulp, mud, and slurry. The product adopts high-frequency or dual frequency excitation method, which effectively improves the ability to resist slurry noise signals, has good stability, is easy to operate, and can measure concentrations up to5%~40%.

Product Features

◆ High concentration of measuring medium: High frequency or dual frequency excitation method ensures measurement accuracy and sensitivity; Eliminating the sharp wave noise interference generated by the slurry medium passing through the electrode surface is more suitable for measuring the slurry. It can be calibrated with multiple frequency combinations to adapt to different media environments.

◆ Measuring unobstructed flow and moving parts inside the measuring tube, especially suitable for liquid-solid two-phase flow, such as coal water slurry, pulp, slurry, and slurry measurement, with a slurry concentration to mass ratio of up to40%The usual change amplitude is less than5%.

◆ High measurement accuracy: The measurement accuracy can reach ± of the indicated value0.5%

◆ Fast response speed: Response speed ≥0.8S,Capable of adaptive damping coefficient

◆ Low conductivity requirement: The measurement accuracy is not affected by physical changes such as medium viscosity, temperature, pressure, density, etc., and the conductivity is ≥20MS/cm

◆ Strong anti-interference ability: Unique noise processing technology, digital filtering, can filter out interference caused by dirt attached to pipelines and electrodes

◆ Rich display content: can display total amount, instantaneous flow rate, flow rate, percentage flow rate and other content

Product performance

◆ Display (optional content)

◆ Display: Adopting a large screen backlight LCD display, it can display numbers or characters such as flow rate, total amount, percentage, alarm information, etc., and use infrared buttons to display optional display content.

◆ Internal accumulation calculator: For total forward flow, total reverse flow, and net flow, it can be implemented10Accumulated Calculation

◆ Power supply: There are two models to choose from

◆ communicationAC（100~230）±15%V,47~440Hz,The maximum power consumption is80W

◆ direct currentDC11~40VThe maximum power consumption is80W.

output

1.analog quantity 4~20Ma /Load resistance ≤650Ω The two analog outputs are divided into forward flow and reverse flow analog outputs.

2.double pulse

Can reflect both forward and reverse flow, for0~2000HzSquare wave or fixed pulse signal. The parameters such as pulse repetition frequency, cutoff frequency, and pulse width can be programmed and set. The frequency can be set to1~2000HzAny integer value within the range. When the isolated output crystal is conducting, the current is ≤150mA, open circuit voltage<35V

3.Double alarm

The following parameters can be programmed: upper and lower limit flow rate, air traffic control detection; Error conditions; positive/Reverse flow; Polarity (normally open)/Constant off analog quantity within the specified range, pulse (frequency) within the specified range; Pulse cut-off frequency, etc. When the output transistor protected by isolated output is turned on, the current is ≤150mASo that it can be generated at this time0VVoltage. open-circuit voltage< 35 V(Note: Not isolated from frequency output)

◆ Input: The cumulative calculator for closed contacts isolated from the outside is reset to zero. (Note: Not isolated from pulses and alarms) Isolated in analog quantities, pulse quantities/The isolation voltage between the alarm signal and ground is DC500V.

◆ Temperature: Operating temperature:-25oC ~+60oC

◆ Protection of the external environment: Protection standards:IP65

◆ Configuration: The configuration is stored in a non-volatile memory (usually storable)10Year)

The value pre-set by the user can be changed

◆ Self diagnosis: The converter can confirm whether the hardware is normal and perform fault diagnosis. For example, coil drive failure, etc

◆ Flow rate setting: equivalent to maximum flow rate ≤（12m/s）The flow measurement range of percentages can be changed.

◆ Interchangeability: The converter is fully compatible with various calibersMFDSensors are interchangeable for use.

◆ The converter can be configured on site. Replacing the converter will not affect the system's characteristics

◆ Sealing of outlet box:M20*1.5Sealing sleeve. When the user has special requirements, they can be explained.

◆ Time constant: from1Seconds to120All programmable in seconds

◆ display direction:Integrated display direction: In the case of using an integrated electromagnetic flowmeter, the direction displayed by the converter may be difficult to observe due to the pipeline direction. In this case, the display direction can be selected to meet the requirements (i.e. horizontal or vertical)

◆ Explosion proof performance (please refer to detailed explosion-proof parameters)GB3836.1）

◆ Electrical equipment for explosive gas environments other than coal mines

Product features

◆ Full configuration: Engineering units can be selected, such as flow ratio, flow unit, all outputs, etc

◆ Air traffic control detection: Ensure display during air traffic control“0”

◆ Interchangeability: Converter/Sensors are interchangeable and do not affect performance

◆ Self diagnosis: Ensure that the converter and sensor are working properly

◆ Test mode: It can test various output and display functions even without connecting sensors

◆ There are three display options: no display, two line display, and three line display.