Ludwig FE10 User manual

LUDW IG
SCH NEI DER
德国罗德玮格仪表公司
Intelligent Electromagnetic Flowmeter Instruction Manual
智能型电磁流量计使用说明书
EN
CH
Intelligent Electromagnetic Flow Model: FE10

Ludwig China Representative Office
Ludwig Automation Instrumentation
(Guangzhou) Co., Ltd.
Ludwig International Trade (Shanghai) Co., Ltd.
TEL：[phone]
E-mail：[e-mail]
OS：www.Ludwig-Schneider.com.cn
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智能型电磁流量计 型号: FE10 36-70
Ludwig Schneider GmbH & Co. KG
KGAmEichamt 4-6,97877 Wertheim
EN
CH 页
Intelligent Electromagnetic Flow Model: FE10

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Table Of Contents
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7017872.0609/2018 CH/EN
1.1 Main Body Design Function Of LCD Flow Totalizer---------------------01
1.2 Sign Description ---------------------------------------------01
1.Overview----------------------------------------------------02
2.Features ----------------------------------------------------02
3.Measurement principle------------------------------------------02
4.Technical index -----------------------------------------------03
5.Dinebsions of electromagnetic flow sensor ---------------------------03
Appendix1、Selection Of Electrode Material For Electromagnetic Flowmeter----05
Appendix2、Selection of lining material for electromagnetic flowmeter---------06
Appendix3、Flow Chart Of Electromagnetic Flowmeter--------------------07
1.The Sensor Has The Following Characteristics ------------------------08
2.Product Type And Composition------------------------------------08
3.Main Technical Performance -------------------------------------08
4.Working Principle And Structure-----------------------------------09
5.Installation And Use--------------------------------------------11
6.Maintenance, Repair And Common Troubleshooting --------------------13
7.Unpacking And Product Completeness------------------------------14
1.220V / 24V Converter Wiring Diagram -------------------------------15
2. 3.6V Battery-Powered Converter----------------------------------25
3. Instrument Installation------------------------------------------30
4.Troubleshooting ----------------------------------------------34
5. Download Google ---------------------------------------------34
6. Supply And Demand Sides Shall Be Responsible During The Warranty Period--34
一、Product Design Function/Signature Description
二、Intelligent Electromagnetic Flowmeter
三、Intelligent Plug-In Electromagnetic Flowmeter Y
四、Converter Operation

1.Product Design Function/Signature Description
1.1 Flow meter body function
1.2 Sign Description
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②① Intelligent liquid crystal display
② Electrical interface
③ Fluid diameter
④ Process connection
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01
③
④
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
11
12
13
14
15
16
17
①
11
12
13
14
15
16
17
① Model
② Meter factor
③ Lining Material
④ Electrode Material
⑤ Nominal Diameter
⑥ Output
⑦ Accuracy
⑧ Ex No
⑨ Code No
⑩ Temperature
Flow Range
Pressure
Power Supply
Tag Number
Protection
Ex Level
Dat

1.Overview
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Intelligent Electromagnetic Flowmeter
The design and manufacture of electromagnetic flowmeters conform to the standard JB / T9248-1999
"Electromagnetic Flowmeters". It is a speed-type instrument for measuring the volumetric flow of
conductive media. While performing on-site monitoring display, it can input standard current signals
for Record, adjust, control and use, realize automatic control of detection. It can realize long-distance
transmission of signals. It is widely used in environmental protection, steel, petroleum, chemical, coal,
metallurgy, minerals, papermaking, water supply and drainage, food, medicine and other industries
The structure of liquid flow measuring instruments are integrated and separated
2.Features
·The measurement accuracy is not affected by changes in the density, viscosity, temperature,
pressure, and conductivity of the fluid. The sensor voltage signal has a linear relationship with the
average flow rate, and the measurement accuracy is high;
·Can record forward total, reverse total, and difference total;
·Low-frequency rectangular wave excitation, not affected by power frequency and on-site
interference, stable and reliable operation;
·With empty tube measurement and glance function, and can adapt to different fluid media;
·It is not affected by the direction of the fluid and can be accurately measured in both forward and
reverse directions;
·LCD backlit display, parameters can be modified online, simple and convenient operation;
·The minimum electrical conductivity of the measured liquid is N20 uS / cm. With various lining
materials, it can be used to measure the flow of various acids, alkalis, salt solutions and mud, mineral
pulp, pulp and other media;
·Chinese and English display (optional);
·There are no moving parts in the measuring tube, which is convenient for maintenance and
management;
V-Average fluid velocity(m/s)』4/
-Meter factor
Flow Q is：
Where：Q=3600 X V X S
The electromagnetic flowmeter is based on the principle of Faraday's electromagnetic induction law,
that is, when a conductive object moves in the magnetic field to cut the magnetic field lines, an induced
electromotive force is generated in the conductor, and the induced electromotive force E is:
D—Electrode spacing(m) E
E=KBdV
B—Magnetic induction(T) N
S—Cross-sectional area(1") Measurement schematic
3.Measurement principle

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EN
When measuring the flow rate, the conductive liquid flows at a flow rate V through a magnetic field
perpendicular to the flow direction. The flow of the conductive liquid induces a voltage proportional to
the average flow rate. The induced voltage signal is detected by the electrode in direct contact with the
liquid. The flowmeters S, B, and d are constant. Therefore, the flow rate is proportional to the
magnitude of the induced electromotive force E (or the flow velocity V).
4.Technical index
·Electrode material: SUS316, Hastelloy B (IIB), Hastelloy C (IIC). Titanium (Ti), coarse (Ta), clamp /
titanium alloy, stainless steel coated carbide
·Flow measurement range：0.5~10 m/s
·Measurement parameters: instantaneous flow, velocity, cumulative total forward and reverse
·Detection alarm parameters: fluid empty pipe detection alarm, excitation current detection alarm,
upper and lower limit alarm, system alarm
·Working temperature：-20℃~70℃
·Dielectric conductivity：20 jAs/cm
·Applicable measuring diameter：D N6mm~ D N3000mm
·Lining material: polychloroprene rubber, polyurethane rubber, polysilicon fluorine rubber,
polytetrafluoroethylene (PTFE). Polyperfluoroethylene propylene F46, PFA
·Converter working environment humidity：W9 5%
·Enclosure rating：I P 6 5、I P 67. I P 6 8
·Matching accuracy level：0.5 level, 0.2 level
·Internet function：HART、MODBUS、GPRS、PRO F I BU S (Optional)
·Power supply
AC power supply, voltage applicable range: 85VAC- 2 5 0VAC DC 2 4 V power supply, voltage
5.Dinebsions of electromagnetic flow sensor
Continued on next page
Nominal
diameter
(mm)
6
10
15
20
25
32
40
50
Nominal
pressure
(Mpa)
Dimensions
4 U
Gauge length
(mm) D II
Reference
weight
(kg)
200
200
200
200
200
200
200
200
90
90
95
105
115
140
150
165
220
220
220
220
223
240
250
263
6
6
8
10
12
13
14
15
Intelligent Electromagnetic Flowmeter

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0.6
1.6
1 n
l.u
1.0
65
80
100
125
150
200
250
300
350
400
450
500
600
700
800
900
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
250
250
250
250
300
350
450
500
550
600
600
600
600
700
800
900
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
185
200
235
270
300
340
405
460
520
580
640
715
840
895
1015
1115
1230
1405
1630
1830
2045
2265
2475
2685
2905
2905
3315
283
290
318
350
380
430
495
547
602
665
720
783
897
982
1092
1192
1299
1488
1700
1924
2134
2344
2549
2754
2964
3169
3369
18
20
25
28
30
50
70
95
120
140
160
200
280
350
400
480
550
660
750
850
980
1200
1600
2000
2400
2700
2900
Note: Our company can customize and process according to user requirements
Outline drawing of electromagnetic flow sensor
Intelligent Electromagnetic Flowmeter

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Appendix1、Selection Of Electrode Material For Electromagnetic Flowmeter
Corrosion resistance of electrode materials (for reference only)
Electrode material
SUS316
Hastelloy B
（HB）
Hastelloy C
（HC）
Titanium(Ti)
Tantalum(Ta)
Pliers / titanium alloy
Stainless steel
coated carbide
Corrosion resistance
Good corrosion resistance to hydrochloric acid at all concentrations below the boiling
point, and also resistant to corrosion by non-oxidizing acids, alkalis, and non-oxidizing
salts such as sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids
Resistant to the corrosion of non-oxidizing acids, such as nitric acid, mixed acids or
mixed media of sulfuric acid and sulfuric acid, as well as corrosion of oxidative salts
such as Fe ..., Cu- or other oxidants. Corrosion of hypochlorite solution above sea
temperature, seawater
Resistant to seawater, various chlorides and hypochlorites, oxidizing acids (including
fuming sulfuric acid), organic acids, alkalis, etc., not resistant to the corrosion of
relatively pure reducing acids (such as sulfuric acid, hydrochloric acid). However, if the
acid contains an oxidant (such as nitric acid, Fe ..., Cu-), the corrosion is greatly
reduced.
Has excellent corrosion resistance, very similar to glass, except hydrofluoric acid,
oleum, alkali, and can withstand almost all chemical media (including boiling point
hydrochloric acid, nitric acid and sulfuric acid and aqua regia below 150P) Note: in Not
resistant to alkali.
For non-corrosive and highly abrasive media.
Used in industrial water, domestic water, sewage, weakly corrosive media, widely used
in petroleum, chemical, steel and other industrial sectors and municipal, environmental
protection and other fields
Applicable to almost all chemicals, but not to aqua regia and osmium salt.
For reference users should be based onMake your own choices based on the actual situation, and if
necessary, perform the corrosion resistance test of the materials to be selected, such as the hanging
Note: Due to the variety of media, its corrosivity is affected by complex factors such as temperature,
concentration, and flow rate, so this table is only
Intelligent Electromagnetic Flowmeter

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Appendix2、Selection of lining material for electromagnetic flowmeter
The lining material should be selected according to the corrosion, abrasion and temperature of the
tested medium
Lining material
Polychloroprene
rubber
Polyurethane
rubber
Polysilicone
rubber
Teflon
（PTFE）
Perfluoro Ethylene
propylene F46
PFA
Main performance Scope of application
1.Excellent elasticity, high breaking force and good
abrasion resistance
2. Resistant to general low-concentration acid, alkali
and salt media, not resistant to oxidative media
1. Excellent abrasion resistance (equivalent to 1 times
of natural rubber)
2. Poor acid and alkali resistance
3.Cannot be used in water mixed with organic solvents
2, not resistant to the corrosion of any concentration of
acid, alkali, salt medium
1.Excellent elasticity, high breaking force, high
temperature resistance
2. Poor wear resistance
1. The material with the most stable chemical properties
in plastics. It is resistant to boiling hydrochloric acid,
sulfuric acid and aqua regia. It is also resistant to
concentrated alkali and various organic solvents.
corrosion.
1.Corrosion resistance is the same as PTFE
2, can withstand low wear
3.Strong resistance to negative pressure
Food grade, same corrosion resistance as PTFE,
strong anti-negative pressure ability
Water, sewage,
weak wear
Sexual mud, ore slurry
Neutral strong abrasion
pulp,Coal slurry, mud, etc.
W160P water
Strong acid and alkali
Corrosive medium
1. Same as PTFE
2.can be used for
low-wear media
3.Can be used in negative
pressure state
Can be used in a negative
pressure state
Intelligent Electromagnetic Flowmeter

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Appendix3、Flow Chart Of Electromagnetic Flowmeter
Flow rate
10
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
700
800
900
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
0.5
0.1414
0.3181
0.5655
0.8836
1.4476
2.2619
3.5343
S.9730
9.0478
14.1372
22.0893
31.8086
56.5487
88.3573
127.2345
173.1803
226.1947
286.2776
353.4292
508.9380
692.7212
904.7787
1145.1105
1413.7167
2035.7520
2770.8847
3619.1147
4580.4420
5654.8667
6842.3887
8143.0080
9556.7247
11083.5387
12723.4500
1
0.2827
0.6362
1.1310
1.7671
2.8953
4.5238
7.0686
11.9459
18.0956
28.2743
44.1786
63.6173
113.0973
176.7146
264.4690
346.3606
452.3893
572.5553
706.8583
1017.8760
1386.4424
1809.5574
2290.2210
2827.4334
4071.5041
5541.7694
7238.2295
9160.8842
11309.7336
13684.7776
16286.0163
19113.4268
22167.0774
25446.9001
2
0.5654
1.2723
2.2619
3.5343
5.7906
9.0478
14.1372
23.8918
36.1911
56.5487
88.3573
127.2345
226.1947
353.4292
508.9380
692.7212
904.7787
1145.1105
1413.7167
2035.7520
2770.8847
3619.1147
4580.4421
5654.8668
8143.0082
11083.5389
14476.4589
18321.7684
22619.4671
27369.5552
32572.0326
38226.8536
44334.1648
50893.8001
3
0.S482
1.9085
3.3929
5.3014
8.6859
13.5717
21.2058
35.8377
54.2867
84.8230
132.5359
190.851S
339.2920
530.1438
763.4070
1039.0818
1357.1680
1717.6658
2120.5750
3053.6281
4156.3271
5428.6721
6870.6631
8482.3002
12214.5122
16625.3083
21714.6884
27482.6526
33929.2007
41054.3328
48858.0490
57340.2804
66501.2322
76340.7002
4
1.1309
2.5447
4.5239
7.0686
11.5812
18.0956
28.2743
47.7836
72.3823
113.0973
176.7146
254.4690
452.3893
706.8583
1017.8760
1385.4424
1809.5574
2290.2210
2827.4334
4071.5041
5541.7694
7238.2295
9047.7868
11309.7336
16286.0163
22167.0778
28952.9179
36643.5367
45238.9342
54739.1104
65144.0653
76453.7072
88668.3095
101787.6002
5
1.4137
3.1809
5.6549
8.8357
14.4765
22.6195
35.3429
59.729S
92.4779
141.3717
220.8932
318.0863
565.4867
833.5729
1272.3450
1731.8030
2261.9467
2862.7763
3534.2917
5089.3801
6927.2118
9047.7868
11451.1052
14137.1669
20357.5204
27708.8472
36191.1474
45804.4209
56548.6678
68423.8880
81430.0816
95567.1340
110835.3869
127234.5003
10
2.8271
6.3625
11.3103
17.6714
28.9533
45.2384
70.6862
119.4591
180.9563
282.7432
441.7861
636.1733
1130.9735
1767.1464
2544.6901
3463.6063
4523.8932
5725.5533
7068.5835
10178.7601
13854.4242
18095.5741
22902.2102
28274.3344
40715.0412
55417.6941
72382.2951
91608.8423
113097.3363
136847.7763
162860.1631
191134.2683
221670.7741
254469.0011
Intelligent Electromagnetic Flowmeter

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Intelligent Plug-In Electromagnetic Flowmeter Y
The functional purpose and scope of application of L products
Plug-in electromagnetic flow sensor (referred to as sensor) and plug-in electromagnetic flow
converter (referred to as converter) form a plug-in electromagnetic flowmeter (referred to as
flowmeter), used to measure the volumetric flow of various conductive liquids in the pipeline
1.The Sensor Has The Following Characteristics：
Lower manufacturing cost and installation cost than general flowmeters, especially suitable for large
and medium diameter pipeline flow measurement.
The flowmeter has not only () ~ l () mA  DC or 4 ~ 20mA  DC standard current output, but also l ~
5kHz frequency output.
Adopt advanced low frequency square wave excitation. Zero point stability, strong anti-interference
ability, reliable work.
 The plug-in electromagnetic structure can be conveniently installed and disassembled without
stopping the water under low pressure or pressure. Therefore, it is very suitable for fluid measurement
of existing pipelines and easy maintenance and repair of instruments.
The sensor has almost no pressure loss and extremely low energy loss.
The sensor has no moving parts, simple structure and reliable operation.
The measurement accuracy is not affected by changes in physical parameters such as temperature,
pressure, density, viscosity, and electrical conductivity of the measured medium (as long as the
electrical conductivity is greater than 20 "S / cm).
Large flow measurement range. The full-scale flow velocity in the measured pipe can be arbitrarily set
from lm / s to 10m / s, and the output signal has a linear relationship with the flow rate.
2.Product Type And Composition
The type of the product is a plug-in type, which is connected to the pipeline through a mounting base.
The measuring tube type sensor is suitable for measuring clean media; the flat electrode type is
suitable for measuring liquid flow rate containing other impurities in the medium.
3.Main Technical Performance
3.1 Suitable for measuring pipe diameter：
DN6mm~DN3000mm；
3.2 Flow measurement range：
0.5~10m/s,Full range continuously adjustable from l ~ 10m / s
Key stainless steel, Hastelloy B, Hastelloy C, titanium Ti, Ta.
1.6MPa
3.4 Conductivity of measured medium：
When the full-scale flow rate is> lm / s,±1.5%。
3.5 Working pressure：
3.6Electrode material：
^20pts/cm,
3.3 Measurement accuracy：

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electrode Excitation coil
3.10 Maximum signal transmission distance between sensor and converter：
3.11 Flowmeter output signal：
E = K  B  L  V （tt） In the formula: E——induction electromotive force, volt;
ABS、PTFE
60℃
3.7 Measuring tube (measuring head) material：
3.8 Maximum temperature of measured medium：
3.9 Enclosure rating：
Meet the relevant regulations of GB4208-2008 standard IP6S.
50m （Contact factory for special requirements）
DC current: 0 ~ 10mA load resistance is O ~ lkQ; 4 ~ 20mA load resistance is 0-5000;
Frequency: l ~ 5kllz.
4.Working Principle And Structure
4.1 working principle
The sensor is actually a liquid flow rate measuring instrument, which is a flow rate measuring
instrument made by applying the principle of Faraday's law of induction. Figure 1 is a schematic
diagram of the basic working principle of a plug-in flow meter.
Use a long rod to insert a small electromagnetic flow sensor into a specified position in the pipe being
measured. When a conductive fluid flows vertically through the working magnetic field of the sensor
(when the converter provides the excitation current to the sensor, it will Generate working magnetic
field), which is equivalent to the conductor cutting magnetic field lines in the magnetic field. According
to Faraday's law of induction, it is known that an induced electromotive force is generated at both ends
of the conductor. The induced electromotive force is detected by a pair of electrodes in contact with
the fluid, and the magnitude of the electromotive force is proportional to the magnetic induction
strength B, the distance L between the poles, and the average flow velocity of the fluid. which is
B——magnetic field strength, Tesla;
L——distance between two electrodes, meter;
V——the flow rate through the flow rate sensor
central axis of the pipe under test. At this time, the flow velocity
be multiplied by a factor K.
(that is, the particle flow rate representing the specified
insertion point of the electromagnetic flow sensor. One is to
There are two methods for the company to insert the specified
sensor measures the flow velocity as the maximum flow velocity
insertion point of the pipe under test), m / s K-factor
insert it on the central axis of the pipe under test; Insert it on the
of the pipeline. The average flow velocity of the pipeline should
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2 n
(N + l)(2n+l)
(For smooth pipes)
In the formula: n is the Reynolds number exponent, which can be obtained by formula ③,
N = 1.661gReD
Where: Rrl> —— Reynolds number of pipeline fluid,
]
072
1 Lg(0.2703)
(For rough pipes)
2
Excitation system: The function of the excitation system is to generate a working magnetic field. It
consists of an excitation coil and an iron core. It is insulated and sealed in the measuring head.
Where .K-equivalent absolute roughness, the average height of the protrusions on the inner wall of
the pipeline. Pipes larger than DN400 can be inserted about 0.25D from the inner
Insertion rod: made of stainless steel. The measuring head and measuring tube are fixed in the
insertion tube. The excitation lead and the electrode lead are sealed with the measured medium
through the insertion rod and connected to the junction box. The direction indicator is welded on the
insertion rod to ensure that the working magnetic field, the flow rate and the electrode connection are
perpendicular to each other during installation. The requirements of induction law.
In the formula, A——the cross-sectional area of a circular pipe, m2. Substituting ①, formula into ④,
formula, thenSince the magnetic field strength of the plug-in electromagnetic flow sensor and the
distance between the two electrodes have been determined at the time of manufacture, and the
cross-sectional area of the pipe under test is also obtained, the output electromotive force of the plug-
in electromagnetic flow sensor can represent the flow.
Measuring head (or measuring tube): The measuring head (measuring tube) is located at the flow
velocity mass point of the pipeline to be measured. The flow measuring head (or measuring tube) is an
end or a pipe made of insulating material. A pair of electrodes are mounted on it, except for the
electrode tip or the inner wall of the measuring tube, the other parts are insulated from the measured
fluid.
3
Q=V - A （m/h ） ④
The sensor is shown in Figure 2. It is mainly composed of a measuring head (or measuring tube), an
excitation system, an insertion rod, a junction box, a mounting base (divided into flange connection
and screw connection), and a seal positioning mechanism.
Junction box: The junction box is located on the upper part of the sensor. The terminals in the junction
box are used to connect the sensor and the converter.
4.2 Structure
wall of the pipe. At this time, the flow velocity measured by the flow velocity sensor is the average flow
velocity, and the coefficient K = L. The flow rate of the measured pipeline can be expressed by the
following formula.
Junction box: The junction box is located on the upper part of the sensor, and the terminals in the
junction box connect the sensor and the converter.
Intelligent Plug-In Electromagnetic Flowmeter Y
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Sealing component: Compressed screw seat, compression nut, rubber washer and positioning *
screw made of stainless steel to seal and insert the sensor so that it can withstand a certain working
pressure.
Mounting base: The mounting base is welded to the pipe to be tested, and is used to connect with the
mounting ball valve and insert the flowmeter sensor.
5.Installation And Use
5.1.1 Choice of installation environment
5.1 Preparation before installation
① Keep as far away as possible from equipment with strong magnetic
fields, such as large motors, large transformers, and frequency
conversion equipment.
5.1.2Choice of installation location
② Choose a place with a small fluid flow pulse, that is, away from local
resistance parts such as pumps, valves, and elbows.
⑤ It is easy to measure the diameter or perimeter of the side pipe, and
the ellipse should be small.
③ When measuring two-phase (solid, liquid or gas, liquid) fluids, choose
a place where phase separation is not likely to occur.
② There should be no strong vibration at the installation site, and the
environment of the pipeline should be fixed firmly without changing
much.
① The installation position must ensure that the pipeline is always filled
with the measured fluid.
③ The installation environment should be easy to install and maintain.
④ Avoid negative pressure at the measurement site.
The length of the straight pipe section on the upstream side of the sensor installation pipe should be
greater than or equal to 15D, and the downstream side should be not less than 10D (D is the diameter
of the pipe being tested).
5.1.3 K degree of straight pipe section
The regulating valve should be installed on the downstream side of the
sensor. When measuring, usually the flow control valve should be fully
open.
Before installation, a small hole with a diameter of 60mm should be
opened in the pipe under test, the size is the same as the outer diameter
of the connecting pipe of the mounting base, and the welding between
the mounting base and the pipe under test is shown in Figure 3.
5.1.4 Flow control valve and V. valve
The flow control valve should be installed on the tested pipe on the
upstream side of the sensor.
5.1.5 Welding of mounting base
Figure 3 Mounting the base
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5.2.3 Determine the insertion depth of the plug-in electromagnetic (the position of the two electrodes
on the plug-in electromagnetic flow sensor)
① The axis of the mounting base is at the center of the pipe under test and is perpendicular to the axis
of the pipe under test.
5.2.2 Close the upstream flow control valve or use low-pressure water supply.
② Use stainless steel welding rod for flat welding. After welding, ensure that the flange end face is
parallel to the pipe axis, the weld is firm, and can withstand a pressure of 1.6 MPa without leakage.
③ The distance between the sensor and the converter should generally be less than 15 meters. If
special circumstances need to extend the cable, please contact our company. The type of signal cable
and field cable supplied by our company is RVVP type double-core polyethylene insulation shielded
sheathed cable, specification is 2x 32 / 0.2 outer diameter 4) 8mm, length is 15 meters. For special
requirements, please indicate to us when ordering.
② When laying open, the distance between signal cable and power cable should be more than 1
meter. The signal cable and the excitation cable should also be kept at a certain distance. When laying
the steel pipe, the excitation cable should also be routed separately.
5.2.1 Clean up welding slag and burrs on the test tube mounting base ’
5.2.4 Install the DN50 ball valve on the mounting base as shown in Figure 3. Note that the long cavity
of the ball valve is upward, and check whether the ball valve can be fully opened and closed tightly.
For D> 400mm, the insertion depth is: 1/4 of the pipe diameter '(the meter coefficients at the two
places are different).
There are two types of cable laying: bright and dark.Which kind of laying is used depends on the
specific conditions of the site.
5.2.5 Determination of the insertion depth of the plug-in electromagnetic flow sensor:
5.3 Laying and wiring of cables
5.2 Sensor installation
① The signal cable should not be laid in parallel with the external high-current power cable in a
short distance. Signal cables should generally be electrically shielded from external cables through
threaded steel pipes, and the threaded steel pipes should be connected to the ground wire.
The laying and wiring of cables must pay attention to the following points:
Figure 4 is the electrical wiring diagram between the sensor and the converter. As can be seen from
the figure, there are two cables between the sensor and the converter. One is the excitation line where
the converter supplies the excitation current to the sensor, and the other is the signal line where the
sensor outputs the electromotive force to the converter.
The technical requirements for welding are as follows:
Tighten the nuts and set screws, and pay attention to the direction of the sensor.
For Dw400mm, the insertion depth is: 1/2 of the pipe diameter.
⑤ Connect the converter and sensor terminal indicators one by one as
shown in Figure 4
④The company does not provide converter power supply lines and output
current and frequency cable lines. Because the load current required by these
two types of cables is only tens to hundreds of amps, and the transmission
distance is related to the distance from the field to the control room, so Can
prepare power and output signal cables according to actual needs
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① If the flow rate of the pipe under test is known, you can set the flow range according to the flow
rate in the pipe under test and the setting method of the converter range.
② After the preparatory work is completed, first open the upstream flow control valve of the sensor,
and then slowly open the downstream flow adjustment valve. Observe that the converter shows that
the flow rate should change from small to large. If the display shows a negative value, the power
should be cut off and the signal line "SIG1" and "SIG2" are interchangeable,
5.4 Ground
The flow signal produced by the sensor is very weak, usually on the order of microvolts or table volts.
Therefore, preventing the influence of external electrical interference is an important factor for the
good use of the flowmeter. Grounding is a very effective measure to solve the impact of electrical
interference.
5.5 Adjustment and use
The sensor grounding requirements are mainly the ground of the medium to be measured and the
ground terminal of the converter (terminal "C" is connected to the metal shield of the flow signal cable,
and connected to the medium to be tested through the plug. When the pipe to be tested is a non-
metallic pipe In order to ensure a good ground, you can directly add a ground wire to the ground
terminal of the sensor and install a ground electrode on the pipe under test. The resistance for
grounding should be less than 10Ω.
③ Set the flow range value and sensor coefficient again as needed according to the measured flow
⑤ Open the upstream flow control valve, and then slowly open the downstream flow control valve.
The instrument can be put into operation.
④ Open the upstream flow control valve of the sensor,and then open the downstream flow ad-
justment valve to allow the fluid to be discharged for a few minutes before the gas in the pipeline is
discharged. Close the downstream flow control valve and the upstream flow control valve to make the
pipeline full of fluid, but not flowing, and zero the instrument.
6.Maintenance, Repair And Common Troubleshooting
If the sensor is faulty, you can determine whether the measurement system of the sensor excitation
system is normal according to the inspection method described in Article 7.3 of this note. If there is any
fault, please contact the company, and general users cannot repair it by themselves.
6.1 Maintenance
6.2 Repair
When removing the sensor, pay attention to closing the ball valve
Sensors generally do not require regular maintenance. However, in the case where the measured
medium is prone to fouling on the surface or the inner wall of the electrode and the measuring head
(measuring tube), regular cleaning must be performed. The cleaning cycle depends on the rate of
adhesion fouling. When cleaning the electrode and measuring head (measuring the tube, care must
be taken not to damage the insulation material and the electrode.
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6.3Common troubleshooting
Failure phenomenon
Converter flow is negative
Converter output overrange
The output signal fluctuates
too much
Output signal drifts
to zero gradually
cause
1. Sensor direction indicator plug with
fluidFlow in the opposite direction
2. X and Y in the sensor junction box
orThere is a reverse connection
between A and B
1.The range value of the flow meter
is less than the actual measurement
Magnitude
2.The fluid is not filling the pipeline
excitation coil open circuit
1. There is gas at the sensor electrode,
Causes poor contact between the
electrode and the medium
2. Deposits on the electrode
1.Sensor water
2. The electrode is covered
Method of exclusion
1.Expand the flowmeter range
2.Close the small flow regulating
valve
3. Reconnect
1. Exclude the gas in the pipeline
2.Clean the electrode
1. Replace the sensor
2.Clean the electrode
1. Rotate the sensor direction 180°
2. Reconnect the converter
7.Unpacking And Product Completeness
7.2 electromagnetic flow converter 1
When the user unpacks, please check the model of the sensor according to the packing list, and check
whether the sensor is trapped or damaged. The completeness of the sensor includes:
7.1 plug-in electromagnetic flow sensor 1
7.6 Random files
1 product certificate
7.4 Ball valve DN50, PN1.6MPa 1
7.3 Signal cable RVVP type double core PVC insulation shield 2X10 meters
Installation instruction manual
7.5 Mounting base 1
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Converter Operation
1.220V / 24V Converter Wiring Diagram
1.1 Square meter terminal wiring and marking
Figure 5 Square meter wiring
terminal diagram
ACOM Alarm output location
POUT Flow frequency (pulse) output
ALMH Upper limit alarm output
IOUT Analog current output
PCOM Frequency (pulse) output ground
ALML Lower limit alarm output
VDIN Current two-wire system 24V
contact
EXT + Excitation current +
ICOM Analog current output ground
TRX + Communication input
TRX - Communication input
EXT - Excitation current-
The meaning of each terminal sign is as
follows：
SIG 1 signal1
SGND Signal ground
SIG 2 Signal 2
DS 1 Incentive shield 1
DS 2 Incentive Shield 2
With remote sensor
Analog current output
Frequency or pulse output
Two alarm outputs
Communication input
1.2Square meter connected to sensor signal line processing and marking
Figure 6 Signal processing and labeling
Cold-pressed end
Metal mesh shield
Heat shrinkable tube
Red 32-core wire
green 32-core wire
Flow signal cable RVVP2X32/0.2
Heat shrinkable tube
Metal mesh shield
Cold-pressed end
Red 32-core wire
green 32-core wire
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1.3 Round table terminal wiring and marking
I+:
COM：
P+:
COM：
AL：
AH：
COM：
FUSE：
T+ :
T-:
G：
LI：
L2:
Flow current input
Current output ground
Bidirectional flow frequency (pulse) output
Frequency (pulse) output ground
Lower limit alarm output
Upper limit alarm input
Alarm output location
Input power fuse
Communication input
Communication input
RS485 / 232 communication ground
220V (24V) power input
220V (24V) power input
Figure 7 chart wiring terminal diagram
Processing and labeling of round table signal lines
Processing and labeling of signal lines in Figure S
White double strand
Gray double-stranded shielded wire
The round table signal line is marked as follows：
1.5 Marking definition of each terminal in the round table
White double strand: Red 12 core wire
Black 12 core wire ｝Excitation current
1.4 Processing and labeling of round table signal lines
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Gray double-stranded shielded wire: Red 10-core wire is connected to "Signal 1"
White 13 core wire connected to "Signal 2"
After the electromagnetic flowmeter converter and sensor are connected to the fluid pipeline (whether
it is calibrated or used), the following work should be performed first:
·Tightly connect the pipes before and after the sensor with copper wires
·Ground the sensor well,
·Make sure that the sensor electrode oxide film is formed stably (the electrode and the fluid can be in
continuous contact for 48 hours).
When the meter is powered on, it automatically enters the measurement state. Under the automatic
measurement state, the meter automatically completes each measurement function and displays the
corresponding measurement data. In the parameter setting state, the user uses the four panel keys to
complete the instrument parameter setting.
1.6.1.1 Key functions
a) Key function under automatic measurement
Up key: Cycle through the content displayed on the bottom line of the screen;
Compound key + confirm key: enter parameter setting state;
Shielded wire connected to "signal ground”
Confirmation key: return to the automatic measurement state,
In the measurement state, the LCD contrast adjustment method can adjust the appropriate contrast by
"composite key + up key" or "composite key + down tart".
Up key: add 1 to the number at the cursor;
Compound key + down key: move the cursor to the left;
1.6 Instrument parameter setting
·Make sure the fluid in the pipeline is still when adjusting the zero point of the instrument.
1.6.1 Four-button converter parameters and operation
b) Function of each key in parameter setting state
Down key: Decrease the number at the cursor by 1;
Compound key + Up key: Move the cursor to the right; Confirm key: Enter / Exit submenu;
Confirmation key: In any state, press it continuously for two seconds to return to the automatic
measurement state.
Note:
(1) When using the "composite key", first press the compound tart and then press and hold the "up
key" or "down key" at the same time.
To set or modify the parameters of the meter, the meter must be switched from the measurement state
to the parameter setting state: In the measurement state, press the "composite key + confirm key"
once, the meter enters the function selection screen "parameter setting" and then press the confirm
key Enter the state of entering the password, "00000" state, enter the password to enter and press
"Compound key + confirm tart" to enter the parameter setting screen '
(2) In the parameter setting state, if there is no key operation within 3 minutes, the meter will
automatically return to the measurement state ’
(3) For the flow direction selection of flow zero correction, you can move the cursor to the leftmost
or down, and use "up" or "down" to switch it to the opposite of the actual flow direction.
1.6.1.2 Parameter setting functions and function key operations
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Converter Operation