F-IN-D Series
LF502
150 to 600 mm
( 6” to 24”)
Electromagnetic Flowmeter for
Partially-filled Pipes
Introduction
The LF502 electromagnetic flowmeter uses Faraday’s
Law of electromagnetic induction in the same way as
conventional electromagnetic flowmeters to measure
the flow rate. Position of electrodes in the LF502 is so
designed that it can be used even in a partially-filled
pipe to measure the flow rate.
Improved functional magnetic field distribution tech-
nique enables a high-precision flow measurement con-
tinually from low-level to fully-filled flow conditions.
This eliminates unnecessary piping work such as lifting
the downstream pipe section to fill the detector pipe.
Compared with flowmeters measuring the flow rate by
means of flow level, the obstructionless LF502 flow-
meter does not usually allow mud, sands and other
solid sediment stay at the bottom of the detector pipe
and is unaffected by wave or floating solids on the fluid
surface.
Figure 2. LF502 Electromagnetic Flowmeter
for Partially-filled Pipes
Fluid-level range:
x 30 mm (1 1/4”) to fully-filled condition for Meter
sizes 150 mm (6”) to 300 mm (12”)
The AF100 hand-held terminal or the Model 275 HART
communicator can be used to communicate with the
flowmeter from remote places using the HART com-
munications protocol. See the communications output
specifications for details about the HART protocol.
x 10% of inside tube diameter to fully-filled condition
for Meter sizes 350 mm (14”) to 600 mm(24”)
Accuracy: ±2 % FS (when measurement range is
standard)
Note: The accuracy is measured under standard
operating conditions at Toshiba's calibration facility.
Converter
Required straight pipe length:
Detector
10D minimum on upstream side and
5D minimum on downstream side
Signal cable
Power supply
Note: D is a nominal meter size.
Fluid conductivity:
Fluid temperature:
100µS/cm minimum
0 to 55 °C (32 to 131 °F)
Ambient temperature: –10 to 50 °C (14 to 122 °F)
4-20 mA dc
Excitation
cable
Digital I/O
„ Detector Specifications
Figure 1. LF502 Configuration
Meter sizes: 150 mm (6”), 200 mm (8”), 250 mm
(10”), 300 mm (12”), 350 mm (14”), 400 mm
(16”), 500 mm (20”), and 600 mm (24”)
Fluid pressure: 0 to 2.0 MPa under fully-filled fluid
condition for flange-connected flowmeters
Specifications
„ Overall Specifications
Measurement range:
Connection flange standards: ANSI 150, BS 16,
DIN PN16 and others.
Meter size
Measurement range
in mm (inch)
Structure: NEMA 4 (IP 67) Watertight (standard),
NEMA 6 (IP 68) Submersible (option)
Coating:
150 mm (6”)
200 mm (8”)
250 mm (10”)
300 mm (12”)
350 mm (14”)
400 mm (16”)
500 mm (20”)
600 mm (24”)
0 – 60 m3/h (std) to 0 – 300m3/h
0 – 110 m3/h (std) to 0 – 550m3/h
0 – 175 m3/h (std) to 0 – 875m3/h
0 – 250 m3/h (std) to 0 –1250m3/h
0 – 350 m3/h (std) to 0 –1750m3/h
0 – 450 m3/h (std) to 0 –2250m3/h
0 – 710 m3/h (std) to 0 –3550m3/h
0 –1000 m3/h (std) to 0 –5000m3/h
Phthalic acid resin coating, pearl-gray colored
(standard for watertight type) or black tar epoxy
(option for watertight type and specified
exclusively for submersible type)
EJL- 064A
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LF502
Power supply: One of the following power supply
JIS 10K flange dimensions:
specifications can be selected:
Mass
Meter
L1
L2
L3
No. of
bolts
(kg)
size (mm) (mm) (mm) (mm)
• 100 to 120 V ac (90 to 132 V ac), 50/60 Hz
• 200 to 240 V ac (180 to 264 V ac), 50/60 Hz
(option)
150
200
266
300
245
271
385
436
8
8
approx. 35
approx. 80
• 24 V dc (22 to 27 V dc) (option)
„ Dimensions
Power consumption: approximately 24 VA
Surge protection: Surge protectors are installed in
the power supply and current signal output circuit.
Case: Cast aluminum
Coating: Melamine resin
Painting color: Light gray (munsell N7)
Structure: NEMA 4 (IP 67) Watertight
Cable connection port: Rc(PT) 3/4 male screw
Vibration resistance:
No resonance to the following levels of vibration:
• 5 to 33 Hz with acceleration of 9.8 m/s2
Note: Avoid using the flowmeter in an environment
with constant vibration.
Roll-prevention base
Unit: mm
Installation
„ Dimensions
Figure 4. Detector Dimensions for Meter Sizes
250 mm (10”) to 600 mm (24”)
Unit: mm
See the following tables for dimensions of L1, L2 and
L3 in Figure 4 above, and the number of bolts required
for each flange.
BS16 and DIN PN16 flange dimensions:
Mass
(kg)
L2
(mm)
L3
No. of
Meter
L1
(mm) bolts
size (mm) (mm)
250
300
350
400
500
600
350
400
450
500
600
600
306
329
351
386
401
452
509
559
611
676
758
872
12 approx. 110
12 approx. 120
16 approx. 130
16 approx. 180
20 approx. 190
20 approx. 250
ANSI class 150 flange dimensions:
Mass
(lb)
Figure 3. Detector Dimensions for Meter Sizes
150 mm (6”) and 200 mm (8”)
Meter
L1
L2
L3
No. of
size (inch) (inch) (inch) (inch) bolts
10
12
14
16
20
24
13 3/4 12
15 3/4 13
17 3/4 13 7/8 24 7/8
19 5/8 15 1/4 27 3/8
23 5/8 15 3/4 30 3/8
23 5/8 17 3/4 34 5/8
20 1/8
22 3/4
12 approx. 244
12 approx. 267
12 approx. 289
16 approx. 400
20 approx. 422
20 approx. 556
See the following tables for dimensions of L1, L2 and
L3 in Figure 3 above, and the number of bolts required
for each flange.
BS16 and DIN PN16 flange dimensions:
Mass
(kg)
Meter
L1
L2
L3
No. of
JIS 10K flange dimensions:
size (mm) (mm) (mm) (mm) bolts
Mass
(kg)
L2
L3
No. of
Meter
L1
150
200
266
300
245
271
388
441
8
12
approx. 35
approx. 80
(mm)
(mm) bolts
size (mm) (mm)
250
300
350
400
500
600
350
400
450
500
600
600
306
329
351
386
401
452
506
551
596
666
738
849
12 approx. 110
12 approx. 120
16 approx. 130
16 approx. 180
16 approx. 190
24 approx. 250
ANSI class 150 flange dimensions:
Meter
L1
L2
L3
No. of
Mass
(lb)
size (inch) (inch) (inch) (inch bolts
6
8
10 1/2 9 5/8 15 1/8
11 3/4 10 5/8 17 1/2
8
8
approx. 78
approx. 178
3
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LF502
„ Dimensions (Converter)
Flow regulation
valve etc1
Observation window
Detector
10D minimum
5D minimum
Note: The length of reducers, if used, can be
counted as a part of straight pipe length.
Figure 7. Required Straight Pipe Length on
Upstream and Downstream Sides
Unit: mm
Mass: approx. 18 kg
(including mounting bracket)
„ External Connections
Four-Dia. 12 holes
Grounding
terminal
Figure 5. Converter Dimensions
„ Piping Precautions
(M6 screw)
Intermediate
(1) Flange connection
voltage (IV)
wire, 5.5 mm2
minimum
Power cable
Signal cable
Digital I/O cable
(multi-wire
(2-wire cable)
(2-wire shielded
sheathed cable)
The flowmeter has upstream and downstream
flanges on the ends of detector pipe. Connect
these flanges with the flanges on both sides of
pipeline bore using connection bolts after
inserting a packing between them. See Figure 6.
Tighten the bolts in even increments diagonally
across.
shielded cable)
100 • or less
ground resistance
Excitation cable
Current output cable
(3-wire sheathed cable) (2-wire shielded cable)
Figure 8. Converter Terminal Connections
Signal cable (2-wire shielded sheathed cable)
Upstream
flange
Observation
window
Downstream flange
Observation window
Thick walled steel conduits
Excitation cable (3-wire sheathed cable)
Flow direction
Detector
Packing
Figure 9. Detector Terminal Connections
„ Wiring Precautions
Figure 6. Flange Connection
(2) Required straight pipe length
(1) Be sure to use thick walled steel conduit (22
mm) for signal and excitation cable wiring
between the detector and converter. The
conduit screw is R(PT)1/2. Use flexible
conduits at the cable outlets of the detector as
needed.
The straight pipe length is required to prevent
uneven flow velocity and a disturbance on the
fluid surface in the detector pipe. The required
straight pipe length should be as follows:
• Downstream side: L = 5D minimum
• Upstream side:
where,
L = straight pipe length (straight pipeline length
+ half length of detector pipe length)
L = 10D minimum
(2) Make the grounding wire as short as possible.
Do not use a common ground shared with other
equipment where earth current may flow. An
independent earth ground is recommended.
4
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LF502
Table 1. Type Specification Code
( Model LF502 Flowmeter)
Ordering Information
1. When ordering the LF502 flowmeter, refer to
Table 1 and 2 (Type Specification Codes). An
entry must be made for each of the columns in
each of these tables.
Size
Model
Specification Code
Description
A
B
LF502 Electromagnetic Flowmeter
Meter size
150 mm (6")
K
L
200 mm (8")
M
N
P
Q
R
S
250 mm (10")
300 mm (12")
350 mm (14")
400 mm (16")
500 mm (20")
600 mm (24")
Connection flange standard
ANSI 150
BS16
DIN PN16
JIS 10K
other
2. Fluid characteristics:
(1) Type of fluid to be measured and its
characteristics
(2) Fluid temperature
(3) Fluid pressure
(4) Electrical conductivity of the fluid
C
F
H
J
3. Measuring range
Z
Electrode and Grounding Ring Material
SUS316L+SUS316 (standard.)
SUS316L+SUS316L
Ti (titanium)+Ti (titanium)
Hastelloy C+Hastelloy C
SUS316L+SUS304
other
Lining Material
Teflon PFA
Chloroprene rubber
other
4. Digital I/O specifications
B
C
D
E
F
5. Ordering scope:
(1) Actual flow calibration data:
(required or not)
6. Other items
Z
T
C
Z
Specifications other than standard items
Power Supply
A
B
C
Z
100 to 120 V ac, 50/60 Hz (standard)
24 V dc
200 to 240 V ac, 50/60 Hz
other
Converter Mounting Bolts and Nuts
Panel, wall mount (carbon steel SS400)
Panel, wall mount (304 stainless steel)
Pipe mount (carbon steel SS400)
Pipe mount (304 stainless steel)
other
A
B
C
D
Z
Detector Connection Bolts, Nuts and
Packings
A
Z
not provided
other
Dedicated Preformed Cable
30 m provided
B
C
other lengths, provided
Coating of detector
Phthalic acid resin
Black tar epoxy resin 0.3 mm
Black tar epoxy resin 0.5 mm
Black tar epoxy resin 0.5 mm
(for submersible type)
other
B
C
D
E
Z
Size groups.
A: 150 mm (6”) to 400 mm (16”)
B: 500 mm (20”) and 600 mm (24”)
Size code explanation:
Standard
Option – Not available
5
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„ Year 2000 Compliance:
This equipment does not have any clock in itself. Thus, there is no problem in the
year 2000 compliance.
Specifications are subject to change without notice
Printed in Japan 11/98 (TDOC)
© TOSHIBA Corporation 1998
All Rights Reserved.
Misuse of this product can result in damage to property or human injury.
Read related manuals carefully before using this product.
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