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Introduction

Principle & Structure

The measurement principle of the FE30H electromagnetic calorimeter is based on Faraday's law of electromagnetic induction: when the conductive liquid cuts the magnetic field line in the magnetic field, an induced potential is generated in the conductor, and the induced potential is E:

E=KBVD

In the formula: K——–instrument constant

In the formula: B————magnetic induction intensity

In the formula: V————the average flow velocity in the section of the measuring tube

In the formula: D——– measure the inner diameter of the pipe section

When measuring the flow rate, the conductive liquid flows through the magnetic field perpendicular to the flow direction at a speed V, the flow of the conductive liquid induces a voltage proportional to the average flow rate, and the induced voltage signal directly contacts the liquid through two or more The sensor electrode is detected, and sent to the converter through the cable for intelligent processing to realize the display of the instantaneous flow of the fluid, the display of the accumulated flow, and the communication between the flow data and the control system. There are no moving and blocking parts in the measuring tube, so there is almost no pressure loss and high reliability. The electromagnetic heat meter organically combines the electromagnetic flowmeter and the paired temperature sensor. Using the electromagnetic flowmeter to measure the flow, combined with the paired temperature sensor (PT1000), it can calculate, accumulate, store and display the heat absorbed or released in the heat exchange circuit. The flow and energy calculation unit CPU and sampling module of FE30H electromagnetic heat meter all use ARM single-chip microcomputer, which has large memory capacity and high reliability. The heat calculation can truly realize enthalpy calculation and achieve high accuracy.

Principle of energy metering

The FE30H electromagnetic heat meter calculates and displays the heat released or absorbed by the system according to the flow signal of the flow sensor and the temperature signal of the supply and return water detected by the paired temperature sensor, as well as the time when the water flows. The heat is displayed in the form of a meter, the unit is KWh, the resolution is 1KWh, and the maximum display is 9 digits. The mathematical calculation model is as follows:

In the formula: Q-the heat released or absorbed by the system, the unit is KWh; qm-the mass flow rate of the water flowing through the heat meter, the unit is kg/h; qv-the volume flow rate of the water flowing through the heat meter, the unit is m3/ h; ρ - the density of the water flowing through the heat meter, in kg/m3; Δh - the difference in the enthalpy of the water at the inlet and outlet temperatures of the heat exchange system. The unit is kJ/kg; τ-time, the unit is h.

Features & Benefits

● Electromagnetic calorimeter is an instrument for measuring volume flow, and the measurement results have nothing to do with physical parameters such as flow velocity distribution, flow pressure, temperature, density, viscosity, etc.;

● There are no moving parts in the measuring tube, which is convenient for maintenance and management, so the service life of the sensor is long; no blocking parts, no pressure loss;

● The conductivity of the liquid to be measured can be as low as 5μS/cm, and with various lining materials, it can be used to measure the flow of various acid and alkali media with high accuracy, usually ±0.5% of the flow accuracy;

● High-definition backlight LCD display, Chinese and English menu operation, easy to use, simple to operate, easy to learn and understand;

● The converter has reliable performance, high precision, low power consumption, stable zero point, convenient parameter setting, LCD display, which can display parameters such as cumulative flow, flow rate, and flow percentage;

● The water inlet direction can be bidirectional, and the installation is not restricted. Bidirectional measurement system, which can measure forward flow and reverse flow;

● Full digital processing, strong anti-interference ability, reliable measurement, high precision, flow measurement range up to 150:1;

● Ultra-low EMI switching power supply, using a wide range of power supply voltage changes, good EMC resistance;

● With RS485 digital communication signal output;

● It can be used to match the generally poor water quality of the air conditioning and heating circulation system;

● It can display parameters such as cumulative heat, cumulative flow, instantaneous flow, flow rate, water supply temperature, return water temperature, etc.;

● Correction with the change of water temperature to ensure accurate measurement under different water temperatures;

● Multi-level password setting function to prevent data from being maliciously modified.

technical parameter

Nominal diameter (mm):Pipeline PTFE lining: DN15~DN800
Pipe type rubber lining: DN40~DN1200 (special specifications can be customized)
Temperature difference range:      2~75°C
Temperature measurement range:       4~95°C
Temperature Resolution:0.01°C
Accuracy:0.1°C
Accuracy class:Level 1, Level 2
Measured medium temperature:High temperature rubber lining: -20~+90℃
PTFE lining: -30~+100℃
High temperature PTFE lining: -20~+180℃
Rated working pressure:
(high pressure can be customized)
DN15 - DN80 : ≤2.5MPa
DN80 - DN150 : ≤1.6MPa
DN200-DN800:≤1.0MPa
Display unit:m3/H、m3/M、m3/S、L/H、L/M、L/S、G/H、G/M、G/S(H=Hour M=Minute S=Second) 
Velocity range:0.3-12m/s
Conductivity range:The conductivity of the measured fluid is greater than or equal to 5μs/cm
Current output:Load resistance: 4~20mA; 0~750KΩ
Power supply:AC 220V&DC 24V
Total power consumption:less than 20W
Connection method:Flange and threaded connections can be used between the flowmeter and the piping
environment humidity:<90%rh (non-condensing)
Protection class:IP65 (special order IP68)
Ambient temperature: -25~+60℃ (please consult an engineer under special conditions)
Required straight pipe length:Upstream≥5DN, downstream≥3DN
Flow direction:      Positive, negative, net flow
Implementation standard:DIN EN 1092-1-2002
Standard of the place of use for sales (Order remarks)
LVD 2006/95/EC&EMC 2004/108/EC
EN 61326-1::2006 Emission Standard (BS EN50081-1)
EN 61326-1::2006 Immunity Standard (BS EN50082-1)
EN 61010-1:2001 Equipment Safety Requirements: General Requirements

Selection table

FE30H-Electromagnetic heat meter (cold energy meter)

Transmitter Mounting Type

All-in-one local display and setting type

Split remote display setting type (square)

The way to

15 to 800mm (such as pipe diameter DN15 and expressed as 15)

Installation method

Threaded type (DN15 to DN50)

Flange type (DN15 to DN800)

Electrode material

Electrode material stainless steel 1.4435 (316L)

Electrode material Hastelloy HC

Electrode material Hastelloy HB

Housing and flange material

Main body material: carbon steel

Main body material: stainless steel 1.4301 (304)

Main body material: stainless steel 1.4435 (316L)

output method

no output

4 to 20mA+pulse

Lining material

Lining material PTFE (polytetrafluoroethylene)

Lining material PUR (polychloroprene rubber)

Power supply

AC 85V to 265V

DC 24V

Accuracy class

1%

2%

(Optional accessory) Grounding method

no ground ring

Stainless steel 1.4435 (316L) grounding ring

Titanium alloy grounding ring
This PDF does not contain the complete data of the selection table. For selection, please contact the sales staff or email to sales@kewill-auto.cn to obtain the complete sample.


Process connection withstand voltage class/ D6EN 1092-1 (DIN) PN6
/ D10EN 1092-1 (DIN) PN10
/ D16EN 1092-1 (DIN) PN16
/D25EN 1092-1 (DIN) PN25
/D40EN 1092-1 (DIN) PN40
/D63EN 1092-1 (DIN) PN63
/D100EN 1092-1 (DIN) PN100
/D250EN 1092-1 (DIN) PN250
/PProduct application specific standards

Alternatives: Interface Standard & Communication Method/2Communication: RS485
Prev :FE20 Series Electromagnetic Flowmeter
Next:FE20-I Series Insertion Electromagnetic Flowmeter
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