LF502/LF232*F
6” to 24”
Electromagnetic Flowmeter for
Partially-filled Pipes
(150 to 600 mm )
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
technique enables a high-precision flow measurement
continually 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.
LF502
LF232*F
Compared with flowmeters measuring the flow rate by
means of flow level, the obstruction less LF502
flowmeter 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
Specifications
■
Overall Specifications
The AF900 hand-held terminal (HART*1
Measurement range:
communicator) can be used to communicate with the
flowmeter from a remote place.
*1: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF (HART
Communication Foundation).
Meter size
Measurement range
0 – 264 GPM(std) to 0 – 1320 GPM
6” (150mm)
(0 – 60 m3/h to 0 – 300 m3/h )
0 – 484 GPM(std) to 0 – 2420 GPM
(0 – 110 m3/h to 0 – 550 m3/h )
0 – 770 GPM(std) to 0 – 3850 GPM
(0 – 175 m3/h to 0 – 875 m3/h )
0 – 1100 GPM(std) to 0 – 5500 GPM
(0 – 250 m3/h to 0 – 1250 m3/h )
0 – 1540 GPM(std) to 0 – 7700 GPM
(0 – 350 m3/h to 0 – 1750 m3/h )
0 – 1980 GPM(std) to 0 – 9900 GPM
(0 – 450 m3/h to 0 – 2250 m3/h )
0 – 3124 GPM(std) to 0 – 15620 GPM
(0 – 710 m3/h to 0 – 3550 m3/h )
0 – 4400 GPM(std) to 0 – 22000 GPM
(0 – 1000 m3/h to 0 – 5000 m3/h )
8” (200mm )
10” (250mm )
12” (300mm )
14” (350mm )
16” (400mm )
20” (500mm )
24” (600mm )
Converter
Power supply
Signal cable
Detector
Note: Above flow rate is almost 0 – 3.28 ft/s (std) to 0 –
Excitation cable
4-20 mAdc
16.4 ft/s (0 – 1 m/s to 0 – 5 m/s ) flow velocity.
Fluid-level range:
Digital I/O
Meter size
Specification
6” to 12” m
(150 to 300m )
14” to 24”
1-1/4”(30mm ) to fully-filled condition.
10% of inside tube diameter to
Figure 1. LF502/LF232*F Configuration
(350 to 600mm ) fully-filled condition.
Note: The fully-filled condition means a 100% of inside
tube diameter.
Accuracy: ±2% FS (when measurement range is
standard)
Note: The accuracy is measured under standard
operating conditions at Toshiba's calibration
facility.
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independently)
In the case of DO1
Parameter settings—Parameters can be set as follows
•IR Switches: Various parameters can be set without
opening the converter housing using 4 infrared
switches (password can be set)
Pulse rate: 3.6 to 3,600,000 pulses/h
Pulse width:Settable within the range of 0.3 to
500ms
•Zero adjustment: Zero point adjustment can be
In the case of DO2
started by pressing the switch in the converter.
Pulse rate: 3.6 to 360,000 pulses/h
Pulse width: Settable within the range of 4 to
500ms
•Digital communication: The AF 900 hand-held
terminal is needed to set parameters.
•Damping: 0.5 to 60 s
• Rage switching output
(Selectable in one second increments)
“Field re-verification” Mag-Prover – Toshiba’s
Zero span calibration tool allows unit to be
re-calibrated and verified using an internal
software program. (For more information contact
Toshiba International Corp.)
One Digital Output (DO) is used
･Single direction, 2-range switching signal
･Forward/reverse direction switching signal
Two Digital Outputs (DO) are used
･Single direction, 4-range switching signals
･Forward/reverse 2-range switching signals
Conditions when power fails:
• High/low limit alarm output
Parameter setting values are stored in non-volatile
memory and the values will be restored when the
power returns to normal condition The output and
display will stay as follows when power fails..
Current output: 0 mA
An alarm is output when flow rate goes above or
below the set-point value
Setting range : -10 to 110% of the settable
maximum range
High limit 2 points, low limit 2 points can be set
At the time of alarm output, Normally Open or
Normally Closed contact can be selected
Digital output : OFF (contact open)
LCD display : No display
• Preset point output
Contact ON when totalizer count exceeds the set
value
Surge protection: Surge protectors are installed in the
power supply, excitation circuit, current signal
output and digital I/O circuit.
Setting range: 1 to 99999999 count
Terminal block structure:21-pole, screw connection
• Converter error alarm
An alarm is output when an operation error is
detected by self-diagnosis.
At the time of alarm output, Normally Open or
Normally Closed contact can be selected
type (M4 screw)
Housing: Aluminum alloy
Coating: Acrylic resin-baked coating, pearl-gray
colored
Cable connection ports :
A cable gland is provided for each port.
OD of cable φ11 to 13 mm
Material Nylon 66
Communications signal:
A digital communications (HART protocol) signal is
superimposed on 4 to 20 mA dc analog output signal.
Load resistance: 240 Ω to 1 kΩ
Load capacitance: 0.25 µF or less
Load inductance: 4mH or less
(For maximum cable length, about 2km is a
guideline length when CVV-S 1.25mm2 is used
under standard installation condition.)
G(PF) 1/2 male screws.
Structure: IP67 and NEMA 4X Watertight
Vibration resistance:
No resonance to the following levels of vibration:
• 10 to 55Hz with amplitude of 0.07mm,
• Vibration of 30Hz with 29.4 m/s2 in 4h in each
Note: HART(Highway Addressable Remote
Trans-ducer) is a communications protocol for
industrial sensors recommended by the HCF
(HARTCommu-nication Foundation).
direction will not cause any defect to unit.
Note: Avoid using the flowmeter in an environment
with constant vibration.
Dimension and Weights:
See Figure 5
Output display:
16-character×2-line dot-matrix LCD
(With back light).
2 units can be selected from the flowing units: flow
velocity, instantaneous flow rate, total flow
(forward/reverse/difference flow), total count, %,
custom unit.
3
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Installation
■
■
Dimensions
Separate type LF502 (Meter size 10” to 24”)
Dimensions
Separate type LF502 (Meter size 6” and 8”)
Unit: inch (mm)
Unit: inch (mm)
3.46 (88)
1.57 (40)
4.96 (126)
5.63 (143)
4.96 (126)
5.63 (143)
3.46 (88)
1.57 (40)
1.42 (36)
1.42 (36)
11.81(300)
Roll-prevention base
Figure 4. Detector Dimensions for Meter Sizes
10” (250 mm) to 24” (600 mm)
Figure 3. Detector Dimensions for Meter Sizes
6” (150 mm) and 8” (200 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.
See the following tables for dimensions of L1, L2
and L3 in Figure 3 above, and the number of bolts
required for each flange.
ANSI 150 flange dimensions:
ANSI 150 flange dimensions:
Meter
L1
L2
L3
No. of
Weight
(lb)
Meter
L1
L2
L3
No. of
Weight
(lb)
Size (inch) (inch) (inch) (inch) bolts
Size (inch) (inch) (inch) (inch) bolts
6
8
10.47
9.67
15.14
8
8
Approx.84
Approx. 194
10
12
14
16
20
24
13.78 12.05 20.05
15.75 12.95 22.45
17.72 13.74 24.24
19.69 15.12 26.87
23.62 16.42 30.17
23.62 18.46 34.46
12
12
12
16
20
20
263
318
359
476
527
701
11.81 10.69 17.42
JIS 10K flange dimensions:
Meter
L1
L2
L3
No. of
Weight
(kg)
Size (mm) (mm) (mm) (mm) bolts
150
200
266
300
246
271
386
436
8
12
Approx. 35
Approx. 80
JIS 10K flange dimensions:
Meter
L1
L2
L3
No. of
Weight
(kg)
Size (mm) (mm) (mm) (mm) Bolts
250
300
350
400
500
600
350
400
450
500
600
600
306
329
351
386
403
455
506
551
596
666
740
852
12
16
16
16
20
24
Approx. 110
Approx. 120
Approx. 130
Approx. 180
Approx. 190
Approx. 250
4
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■
Dimensions
9.33 (237)
Installation method
4-φ12 hole
8.74 (222)
2.91 (74)
6.10 (155)
In the case of 2B pipe installation
ト
M10 U bolts
Signal cable ground
Output cable ground
Power supply cable ground
11 to 12 φhole
2.91 (74)
4 places
Grounding terminal
2.99 (76)
I/O cable ground
2.99 (76)
2.99 (76)
Weight : Approximately18 lb (8 kg)
(including a mounting bracket)
Excitation cable ground
Figure 5. Separate type converter LF232＊F
5
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■
External Connections
Terminal box
Power supply
(CVV)
Ⅳ wire
5.5mm2 or more
Power supply
Grounded with 100Ω or
less ground resistance
Current output (4 to 20mA)
Digital input 2 (opt.)
Thick walled steel conduit
Digital input 1 (opt.)
(20 to 30 Vdc)
Digital output 4 (opt.)
Digital output 3 (opt.)
Digital output 2 (opt.)
Digital output
Detector
Signal cable
(2-wire shielded hard-rubber sheathed cable)
Excitation cable
(3-wire hard-rubber sheathed cable)
Output cable
(CVV-S)
Digital I/O cable
(CVV-S)
Figure 6. LF502/LF232*F flowmeter Wiring Diagram
non-conductive like plastic, use a 5.5mm2 or
■
Wiring Precautions
larger core cable for grounding of detector and
wire 1 place as follows.
(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.
• Between Grounding terminal at detector
body and Grounding (100 ohm or less).
(4) DO1 to DO4 and DI1 to DI2 use the same
common terminal (COM). This COM can not
connect to other instruments that have their
own ground terminal (Power supply for
connecting to DI or DO, etc...). Need to wire
separately.
(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.
(3) The meter may affect its accuracy when the
electric potential of measurement fluid is
unstable condition.
• Make the piping of the upstream side and
downstream side the same material.
• When the material of next pipes are conductive
like metal, use a 5.5mm2 or larger core cable for
grounding of detector and wire it at 2 places as
follows.
• Between Grounding terminal at detector body
and Grounding ring at upstream side.
• Between Grounding terminal at detector body
and Grounding ring at downstream side.
• When the material of next pipes are
6
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■
About establishment environment
Do not store or install the flowmeter:
• Where there is direct sunlight.
■
Piping Precautions
(1) Flange connection
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 gasket between them. See Figure 7.
Tighten the bolts in even increments diagonally
across.
• Where excessive vibration or mechanical shock
occurs.
• Where high temperature or high humidity
conditions exist.
• Where corrosive atmospheres exist.
• Places that can be submerged under water.
• Where there is sloped floor. To put the flowmeter
temporarily on the floor, place it carefully with
something, such as stopper, to support it so that the
flowmeter will not topple over.
In areas like the following, there may be the case that
infrared switches do not function correctly. (If these
are unavoidable, use an appropriate cover.)
(1) Where unit (operation panel) is exposed to direct
sunlight, reflection of light onto window pane and
diffused light reflection.
Observation Upstream flange
window
Downstream flange
Bolt
Observation
window
Flow
directio
(2) Where smoke and steam may occur.
Gasket
(3) Where exposed to direct snow, ice or mud.
Figure 7. Flange Connection
■
Ordering Information
(2) Required straight pipe length
1. When ordering the LF502 flowmeter, refer to
Table 1 (Type Specification Codes). An entry
must be made for each of the columns in each of
these tables.
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
3. Measuring range
4. Digital I/O specifications
5. Ordering scope:
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:L = 10D minimum
where,
L = straight pipe length (straight pipeline length
+ half length of detector pipe length)
Flow regulation
Observation window
.
valve etc
Detector
Actual flow calibration data:(Required or not)
6. Other items
Specifications other than standard items
10D minimum
5D minimum
Note: The length of reducers, if used, can be counted as
a part of straight pipe length.
Figure 8. Required Straight Pipe Length on
Upstream and Downstream Sides
7
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Table 1. Specification Code for LF502 detector
Specification Code
Model
Size
Description
1
2
3
5
4
0
5
2
6
7
8
9
10 11 12
A
B
L
F
LF502 Electromagnetic flowmeter
Meter size
K
L
M
N
P
Q
R
S
6" (150mm )
8" (200mm )
10" (250mm )
12" (300mm )
14" (350mm )
16" (400mm )
20" (500mm )
24" (600mm )
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
-
-
-
-
-
-
-
ꢀ
ꢀ
-
A
Standard
ꢀ ꢀ
Connection flange standard
ANSI 150
JIS 10K
C
J
ꢀ ꢀ
ꢀ ꢀ
Lining
C
D
T
Chloroprene rubber
EPDM rubber
Teflon PFA
-
ꢀ
ꢁ
ꢀ
ꢁ
-
Electrode and Grounding Ring Material
316L stainless steel + 316 stainless steel
Titanium + Titanium
Hastelloy C + Hastelloy C
316L stainless steel + 304 stainless steel
B
C
F
ꢁ
ꢁ
ꢁ
ꢀ
ꢀ
ꢁ
ꢁ
ꢁ
H
Flow and calibration velocity range
Standard range calibration
A
ꢀ
ꢀ
Coating
B
C
D
Phthalic acid resin
Black tar epoxy resin , thickness 0.3mm
Black tar epoxy resin , thickness 0.5mm
ꢀ ꢀ
ꢁ
ꢁ
ꢁ
ꢁ
E
Black tar epoxy resin , thickness 0.5mm (for submersible type)
ꢁ
ꢁ
Code explanation: ꢀ: Standard ꢁ: Option
–: Not available
Size groups
A : 6” (150mm ) to 16” (400mm )
B : 20” (500mm ) and 24” (600mm )
Table 2. Specification Code for LF232*F converter
Model
Specification Code
LF232
type
Contents
1
L
2
3
2
4
5
2
6
7
8
9 10 11 12
F
3
Separate type converter
Purpose
Standard
A
ꢀ
ꢀ
Compatible detectors
F
For Partially-filled pipes (Meter size : 150mm(6”) to 600mm(24”) )
Mounting nuts and bolts
Panel, wall mounting (material : 304 stainless steel)
C
E
ꢀ
ꢁ
Pipe mounting
Digital input/output
Current output
+ Digital output points (1 point)
Current output
(material : 304 stainless steel)
1
3
ꢀ
ꢁ
+ Digital output points (4 points) + Digital input points (2 points)
Communication function
HART communication
1
ꢀ
Power supply
100Vac-120Vac, 50/60Hz
Standard
1
ꢀ
ꢀ
A
Code explanation: ꢀ: Standard ꢁ: Option
Specifications are subject to change without notice.
Printed in Japan 2008-5 (TDOC)
© TOSHIBA Corporation 2008
All Rights Reserved.
ISO9001 and ISO14001 certified.
Misuse of this product can result in damages to property or human injury.
Read related manuals carefully before using this product.
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