HHDR electromagnetic heat meter-Fornitore globale

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299 Huahai Road, Jinhu County Industrial Park, Jiangsu Province

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HHDR electromagnetic heat meter

The HHDR electromagnetic heat meter is mainly used for real-time measurement of the supply temperature, return temperature, and instantaneous flow rat

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Product details

Working principle/working principle-----------------------------------------------------------◆◆

The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a non-magnetic alloy short tube lined with insulating material. Two electric tube poles are fixed on the measuring tube through the tube wall in the radial direction. The electrode tip is basically flush with the inner surface of the lining. When the excitation coil is excited by bidirectional square wave pulses, a working magnetic field with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube. At this point, if a fluid with a certain conductivity flows through the measuring tube, an electromotive force E will be induced by cutting the magnetic field lines. The electromotive force E is proportional to the product of the magnetic flux density B, the inner diameter d of the measuring tube, and the average flow velocity V. The electromotive force E (flow signal) is detected by the electrode and sent to the converter through a cable. After amplifying and processing the flow signal, the converter can display the fluid flow rate and output signals such as pulses and simulated currents for flow control and regulation.

Product Features/Product features-----------------------------------------------------------◆◆


1. The instrument structure is simple and reliable, with no movable parts and a long working life
2. There are no flow blocking components, and there is no pressure loss or fluid blockage.
3. The measuring tube has no resistance components, no pressure loss, and is not affected by poor water quality
4. The measurement accuracy is not affected by the type of measured medium and its physical parameters such as temperature, viscosity, pressure, etc.
5. A separately designed sealing component at the connection between the sensor and the meter head can prevent external moisture from entering the meter head and sensor through the connection
6. The excitation and electrode wires are both made of high-quality single core shielded wires, which can reduce interference, improve signal cleanliness, and thus enhance measurement accuracy.
7. The surface paint of the sensor is made of metal fluorocarbon paint. The fluorocarbon bonds attached to the fluorocarbon resin molecules in the metal fluorocarbon paint can resist the degradation effect of ultraviolet light, exhibiting extremely excellent durability, UV resistance, and weather resistance, making the metal fluorocarbon paint coating long-lasting and perfect, reducing maintenance requirements
8. Large screen LCD backlit display, with clear readings in both strong and low light conditions
9. The language can display both Chinese and English
10. The LCD screen displays instantaneous flow rate, instantaneous heat, cumulative flow rate, cumulative heat, inlet temperature, outlet temperature, temperature difference, and flow rate
11. Adopting the enthalpy correction method with temperature changes to ensure accurate measurement at different water temperatures
12. Equipped with RS485, Modbus, and HART communication
13. Automatic data storage
14.220V AC, 24V DC power supply

Product parameters/Product parameters--------------------------------------------------------◆◆

name	HHDR Intelligent Electromagnetic Heat Meter
Nominal Diameter	DN10-DN400
structural style	One body type, split body type
Maximum flow velocity	15m／s
Fluid conductivity	≥5uS／cm
accuracy class	Level 0.5, Level 1.0 (differentiated by caliber)
Lining material	Polytetrafluoroethylene, chloroprene rubber, polyvinyl chloride, perfluoroalkoxy (F46)
Rated pressure	4.0Mpa, 1.6Mpa, 1.0Mpa
Maximum fluid temperature	All-In-One	70℃
	separated	PTFE lining	100℃； 150 ℃ (special order required)
		neoprene	65℃
		polyurethane	40℃
		Perfluoroethylene propylene (F46)	100℃； 150 ℃ (special order required)
		PFA	100℃； 150 ℃ (special order required)
Signal electrode and ground electrode materials	316L, Hastelloy B, Hastelloy C
Sensor material	Carbon steel, 304 stainless steel
Shell protection	IP65, IP68 (special customization required)
output signal	Pulse, frequency
cable interface	G1/2 internal thread
communication	RS485 communication (Modbus protocol) HART
Display on monitor	Instantaneous flow rate, instantaneous heat, cumulative flow rate, cumulative heat, flow rate, inlet temperature, outlet temperature, temperature difference
power supply	220V AC 50HZ, 24V DC
Excitation method	Bidirectional constant current square wave excitation

measuring range	Caliber (mm)	Measurement range (m 3/h)	Caliber (mm)	Measurement range (m 3/h)
	DN10	0.14 ～ 1.40	DN125	22.08～ 441.56
	DN15	0.32 ～ 6.36	DN150	31.79～ 635.85
	DN20	0.57～ 11.30	DN200	56.52 ～ 1130.4
	DN25	0.88～ 17.66	DN250	88.31 ～ 1766.25
	DN32	1.45～ 28.94	DN300	127.17～ 2543.40
	DN40	2.26～ 45.22	DN350	173.09～ 3461.85
	DN50	3.35～ 70.65	DN400	226.08～ 4521.60
	DN65	5.97～ 119.40
	DN80	9.04～ 180.86
	DN100	14.13 ～ 282.60

Product dimensions/Product dimensions-----------------------------------------------------◆◆

Nominal diameter DN	pressure rating	Outer diameter of flange D	Bolt hole center circle diameter K	Bolt hole n-L	Total length L	Height H	Reference weight kg
10	PN40	90	60	4-φ14	200	190	10
15	PN40	95	65	4-φ14	200	190	10
20	PN40	105	75	4-φ14	200	190	10
25	PN40	110	85	4-φ14	200	200	10
32	PN40	140	100	4-φ18	200	205	11
40	PN40	150	110	4-φ18	200	215	12
50	PN40	165	125	4-φ18	200	220	15
65	PN16	185	145	4-φ18	200	240	16
80	PN16	200	160	8-φ18	200	255	18
100	PN16	220	180	8-φ18	250	270	20
125	PN16	250	210	8-φ18	250	300	25
150	PN16	285	240	8-φ22	300	330	30
200	PN16	340	295	12-φ24	350	390	45
250	PN16	405	355	12-φ26	450	450	65
300	PN16	460	410	12-φ28	500	500	79
350	PN16	520	470	16-φ30	550	520	95
400	PN16	580	525	16-φ32	600	635	140

Product selection/Product selection-----------------------------------------------------------◆◆

Installation method/Installation method---------------------------------------------------------◆◆

1. Installation requirements
General requirements
a. For the convenience of installation, maintenance, and upkeep, sufficient space should be reserved around the flowmeter
b. Avoid installing flow meters in places with large temperature changes or high temperature radiation from equipment
c. Flow meters should be installed indoors. If installed outdoors, direct sunlight should be avoided and sun protection devices should be installed if necessary
d. Avoid installing flow meters in environments containing corrosive gases
e. Avoid installing flow meters in places with strong vibration sources and magnetic fields
Process management requirements
a. The inner diameter of the upstream and downstream process pipes and the inner diameter of the flow meter should meet the following requirements: 0.98DN ≤ D ≤ 1.05DN (DN: flow meter inner diameter; D: Inner diameter of process pipe
b. The process pipe and flow meter should be concentric, with a coaxial deviation of no more than 0.05DN

Wiring Guide/Wiring guide-----------------------------------------------------------------◆◆

Common faults and solutions/Common failures and solutions----------------------------------◆◆

Fault name	solution
Converter has no display	1. Check if the power supply is connected. 2. Check if the fuse is intact. 3. Check if the power supply voltage meets the requirements. 4. If all three items are normal, the converter will be returned to the factory for repair
Excitation alarm	1. The insulation degree of the excitation coil decreases
Air traffic control alarm	1. Is the measured fluid filled in the tube? 2. Is the flowmeter installed correctly as required? 3. The conductivity of the measured fluid is too low. 4. The threshold value of the empty tube is set too low
Display traffic when there is no traffic	1. The air traffic control threshold is set too high. 2. The air traffic control alarm is not allowed to be turned on. 3. The electrode is contaminated, causing zero point deviation (when the pipeline is full). 4. The insulation degree of the signal line decreases (when the pipeline is full)
Flow measurement is inaccurate or fluctuates greatly	1. Is the fluid filled in the pipe? 2. Is the flowmeter grounded according to regulations? 3. Has the insulation degree of the signal line decreased? 4. Is the flowmeter installed correctly as required
Traffic limit alarm	1. If the on-site traffic exceeds the traffic limit threshold, modify the traffic limit threshold
Flow lower limit alarm	1. If the on-site traffic is below the lower limit threshold, modify the lower limit threshold of the traffic
No traffic display when there is traffic	1. Is the shut-off valve open? 2. Is the signal line grounded? 3. The flow rate is too low, and the small signal cutoff setting is too high. 4. The air pipe threshold is set too low

Attachment/attachment--------------------------------------------------- -----------------◆◆

1. Grounding wire (standard)
2. Grounding ring (optional)
3. Paired flange (flange size table)

The nominal Tongjing	Outer diameter (D)	Inner diameter (B)	Center distance (K)	Bolt hole diameter (L)	Number of bolt holes (n)	Sealing surface (d)	flange thickness
15（4.0）	95	19	65	14	4	46	14
20（4.0）	105	26	75	14	4	56	16
25（4.0）	115	33	85	14	4	65	16
32（4.0)	140	39	100	18	4	76	18
40 (4.0)	150	46	110	18	4	84	18
50 (4.0）	165	59	125	18	4	99	20
65（1.6）	185	78	145	18	4	118	20
80（1.6）	200	91	160	18	8	132	20
100（1.6）	220	110	180	18	8	156	22
125（1.6）	250	135	210	18	8	184	22
150（1.6）	285	161	240	22	8	211	24
200（1.6）	340	222	295	22	12	266	26
250（1.6）	405	276	355	26	12	319	28
300（1.6）	460	328	410	26	12	370	32
350（1.6）	520	381	470	26	16	429	35
400（1.6）	580	430	525	30	16	480	38
450（1.0）	615	485	565	26	20	530	35
500（1.0）	670	535	620	26	20	582	38
600（1.0）	780	636	725	30	20	682	42
700（0.6）	860	724	810	26	24	772	40
800（0.6）	975	824	920	30	24	878	44
900（0.6）	1075	924	1020	30	24	978	48
1000（0.6）	1175	1024	1120	30	28	1078	52
1200（0.6）	1405	1224	1340	33	32	1295	60
1400（0.6）	1630	1424	1560	36	36	1510	68
1600（0.6）	1830	1624	1760	36	40	1710	76
1800（0.6）	2045	1824	1970	39	44	1918	84