Flowmeter LDG Owner's Manual
Electromagnetic Flow Meter
Owner’s Manual
http://flowmeternara.com/
Address: #910, KolonScienceValley2nd,
#811,Guro-dong,Guro-gu,Seoul,
Korea…………….
TEL: +82-2-2025-0562
FAX: +82-2-2025-0565
Manual No. 090820-4 Rev.A
Content
1.0 GENERAL INFORMATION ...............................................................................................2
2.0 SPECIFICATIONS................................................................................................................4
3.0 MODEL AND SELECTION.................................................................................................5
4.0 CAUTIONS FOR INSTALLATION....................................................................................6
5.0 ELECTRICAL WIRING ......................................................................................................9
6.0 PROGRAMMING AND SETUP.......................................................................................... 9
7.0 TROUBLESHOOTING.......................................................................................................13
Copyright Reserved, DONGYANG Corporation 1
1.0 GENERAL INFORMATION
This manual will assist you in installing, using and maintaining your DONGYANG flow meter.
It is your responsibility to make sure that all operators have access to adequate instructions
about safe operating and maintenance procedure.………………………………………………
Warning
For your safety, review the major warnings and cautions below before operating your
equipment.……………………………………………………………………………..
1. Use only fluids that are compatible with
the housing material and wetted components
of your meter.
2. When measuring flammable liquids,
observe precautions against fire or explosion.
3. When handling hazardous liquids, always
follow the fluids manufacturer’s safety
precautions.
4. When working in hazardous environments,
always exercise appropriate safety
precautions.
…………………………..
5. During meter removal, fluids may spill.
Follow the fluids manufacturer’s safety
precautions for clean up of minor spills.
…………………………..
6. When tightening the meter, use a
wrench only on the wrench flats. …………...
7. For best results, calibrate the meter at
least 1 time per year.……………………
Product Description
DONGYANG LDG electromagnetic flow meters are intended for fluid measurement in most
industries including water, wastewater, food and beverage, pharmaceutical and chemical.
……….
There are two basic components of DONGYANG electromagnetic flow meter: 1)The Detector,
which includes the flow tube, isolating liner and measuring electrodes, and 2) The Converter,
which is the electronic device responsible for signal processing, flow calculation, display and
output signals.
The materials of construction of the wetted parts (liner and electrodes) should be appropriate for
the specifications on the intended type of service. Review of the compatibilities consistent with
the specifications is recommended.
All DONGYANG’s electromagnetic flow meters are factory tested and calibrated. A calibration
certificate is included in the shipment of each meter.
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Unpacking and Inspection
Upon receipt, examine your meter for visible damage. The meter is a precision measuring
instrument and should be handled carefully. Remove the protective plugs and caps for a
thorough inspection. If any items are damaged or missing, contact DONGYANG.
Make sure the flow meter model meets your specific needs. For your future reference, it might
be useful to record this information on nameplate in the manual in case it becomes unreadable
on the meter.
Transportation and Handling
Do not lift the detector from the Converter
housing, the junction box or the connecting
cable. Use lifting lugs for larger sizes is
recommended. Very large meter sizes are
packed and crated with the meter laying on
its side for shipping safety and stability
reasons. In order to lift the meter in vertical
position, it's recommended to use a sling
rigged method as shown below.
If using a forklift, do not lift the detector
from its body between the flanges. The
housing could be accidentally dented and
permanent damage could be caused to the
internal coil assemblies.
Warning: NEVER introduce the
forklift, chains, wire slings or any other
sharp object inside the flow tube for lifting
or handling purpose. This could permanently
damage the isolating liner and could render
the meter inoperable.
Copyright Reserved, DONGYANG Corporation 3
2.0 SPECIFICATIONS
Converter:
Power Supply: 85-265Vac (Optional: 18-36
Vdc)
Power Consumption: 10W
Accuracy:
± 0.5% accuracy of rate from 0.5-10 m/s
± 1.0% accuracy of rate from 0.1-0.5 m/s
Repeatability: 0.2%
Minimum Fluid Conductivity:
5.0 micromhos/cm
Flow Direction: Unidirectional or
bidirectional, 2 separate totalizers
(programmable)
Analog Outputs: 4-20mA, 500ohms Max
Load
Output Frequency: Scaled Pulse output,
(open collector) Max 5Khz
Noise Damping: Programmable
Pulse Width: Programmable up to 500ms
Zero-point Stability: Automatic correction
Housing: Cast aluminum, powder coated
paint
Mounting: Integral mount or remote mount
Ambient Temperature: -4 to 140° F (-20 to
60° C)
Detector:
Flow Range: 0.03-10 m/s
Sizes: 10 to 2200 mm
Min. Conductivity: 5 micromhos/cm
Accuracy:
± 0.5% accuracy of rate from 0.5-10 m/s
± 1.0% accuracy of rate from 0.1-0.5 m/s
Electrode Materials:
Standard: 316 Stainless Steel
Optional: Tantalum
Liner Material: PTFE, FEP (Rubber)
Fluid Temperature:
PTFE: 100°C Standard (Customized: 180°C)
FEP: 60°C
Pressure Limits:
1.0 Mpa; Optional 1.6; 2.5; 4.0 Mpa
Coil Power: Pulsed DC
Ambient Temperature: -20°C to 60°C
Pipe Spool Material: 316 Stainless Steel
Meter Housing Material:
Carbon Steel welded
Flanges:
Carbon Steel - Standard (ISO 7005-1)
316 Stainless Steel - Optional
Optional Stainless Steel Grounding Rings
Measurable Flow Rate Range:
Note: The flow range as blow is for recommended use. Consult the factory if you have special
requirement.
Diameter (mm) 10 15 20 25 32 40 50 65
Qmin (m3/h) 0.08 0.34 0.34 0.53 0.87 1.35 2.1 3.5
Qmax (m3/h) 2 8 8 12 20 32 49 84
Diameter (mm) 80 100 125 150 200 250 300 350
Qmin (m3/h) 5.4 8.5 13 19 34 53 76 104
Qmax (m3/h) 127 197 310 445 791 1236 1780 2423
Diameter (mm) 400 450 500 550 600 700 800 900
Qmin (m3/h) 136 191 212 263 305 415 543 760
Qmax (m3/h) 3165 4294 4945 6322 7122 9693 12660 17634
Copyright Reserved, DONGYANG Corporation 4
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