Toshiba LF150 User manual

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NOTES
Before using the equipment, please read this manual carefully and understand the
contents, and then use the equipment correctly.
•NEVER attempt to operate the equipment in any ways that are not described in this
instruction manual.
•After reading this manual, store it with care in a place where it can be referred to
whenever needed.
•Please be sure that this manual is delivered to the personnel who will use this product.
ELECTROMAGNETIC FLOWMETER DETECTOR
MODEL LF150
INSTRUCTION MANUAL

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NOTICE
This manual is designed to assist in installing, operating, and maintaining the LF150
flange-type electromagnetic flowmeter detector. For safety reasons, and to obtain the
optimum performance of the flowmeter detector, read this manual thoroughly before
working with
the product. For a converter to be used with this detector, read the instruction manual
prepared for each converter.
NOTES
1. No part of this manual may be reproduced in any form without permission.
2. The contents of this manual may be revised without prior notice.
Observe the safety and handling precautions described in this manual and regulations
stipulated in the country where this product is intended to be installed.
2
nd Edition August, 2008
First Edition June, 2008

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SAFETY PRECAUTIONS
Safety signs and labels affixed to the product and/or described in this manual give important
information for using the product safely. They help prevent damage to property and obviate
hazards for persons using the product.
Make yourself familiar with signal words and symbols used for safety signs and labels. Then read
the safety precautions that follow to prevent an accident involving personal injury, death or
damage to property.
Explanation of signal words
The signal word or words are used to designate a degree or level of hazard seriousness.
The signal words used for the product described in this manual are WARNING and CAUTION.
WARNING
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, may result in minor to moderate
injuries or in property damage.
Safety symbols
The following symbols are used in safety signs and labels affixed to a product and/or in the
manual for giving safety instructions.
Indicates an action that is prohibited. Simply DON’T do this action.
Theprohibitedaction is indicated by apicture or text inside or next to the
circle
Indicates an action that is mandatory. DO this action.
Themandatory action isindicated by apictureortextinside or next to the
circle.
Indicates a potential hazard. The potentially hazardous situation is
indicated by a picture or text inside or next to the triangle.

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SAFETY PRECAUTIONS (continued)
Safety Precautions for Installation and Wiring
WARNING
Do not use the LF150 in an explosive atmosphere.
DON’T
Using this product in an explosive atmosphere can
cause explosion.
CAUTION
Turn off mains power before
working on pipes.
Use an appropriate device to carry
and install the LF150.
DO
Working on pipes while
power is applied can cause
electric shock.
DO
If this product falls to
the ground, injury, or
malfunction of or
damage to the product,
can be caused.
Install a switch and fuse to isolate
the LF150 from mains power.
Do not modify or disassemble the
LF150 unnecessarily.
DO
Power supply from mains
power can cause electric
shock or circuit
break-down.
DON’T
Modifying or
disassem-bling this
product can cause
electric shock,
malfunction of or
damage to this product.
Turn off mains power before
conducting wiring work.
Ground the LF150 independently
from power equipment.
DO
Wiring while power is
applied can cause electric
shock.
DO
Operating this product
without grounding can
cause electric shock or
malfunction.
Do not conduct wiring work with bare
hands.
Use crimped terminal lugs for the
terminal board and GND terminal.
DON’T
Remaining electric
charge even if power is
turned off can still cause
electric shock.
DO
Loose connections can
cause electric shock,
fire from excessive
current or system
malfunction.
Do not work on piping and wiring
with wet hands.
DON’T
Wet hands may result in
electric shock.
The label shown left is
placed near the terminal
board for power input.
Be alert to electric
shock.

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SAFETY PRECAUTIONS (continued)
Safety Precautions for Maintenance and Inspection
CAUTION
Do not touch the LF150 main body
when high temperature fluid is being
measured.
Do not conduct wiring work when
power is applied.
DON’T
The fluid raises the main
body temperature and can
cause burns when touched.
DON’T
Wiring while power is
applied can cause
electric shock.
Do not conduct wiring work with wet
hands.
DON’T
Wet hands may result in
electric shock.
The label shown left is
placed near the terminal
board for power input.
Be alert to electric
shock.
Do not use a fuse other than the one
specified.
DON’T
Using a fuse other than the
one specified can cause
system failure, damage or
malfunction.
Disclaimer
Toshiba does not accept liability for any damage or loss, material or personal, caused as a
direct or indirect result of the operation of this product in connection with, or due to, the
occurrence of any event of force majeure (including fire or earthquake) or the misuse of this
product, whether intentional or accidental.

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Safety and Handling Precautions
For safety reasons, observe the following precautions.
(1) Do no work on piping or wiring while power is applied. Otherwise, it may result in
electric shock. Even if the power is turned off, remaining electric charge may still
cause electric shock. Therefore, wear nonconductive gloves whenever you work on
piping or wiring.
(2) Do not use the LF150 detector in a way other than those specified in this manual. It
may cause malfunction or damage to this product.
(3) When high temperature fluid is being measured, the fluid raises the detector pipe
temperature. Do not touch the elevated temperature detector pipe. It may cause
injury to personnel when touched.
(4) As this detector is heavy, observe the following precautions:
Wear protective gloves.
Do not work on piping or wiring when the detector is wet and slippery.
A crane is needed to carry and install the detector.
To put the detector temporarily on the floor, place it with an appropriate support
to prevent it from falling down.
To obtain the optimum performance of the LF150 detector for years of continuous operation,
observe the following precautions.
(1) Do not store or install the detector in a place such as:
• where there is direct sunlight. If this is unavoidable, use an appropriate sunshade.
• where excessive vibration or mechanical shock occurs.
• under high temperature or high humidity condition.
• under corrosive atmospheres.
(2) Ground the detector and converter with less than 100 ohm ground resistance. Avoid
a common ground used with other equipment where earth current may flow. An
independent ground is preferable.
(3) The retaining screws for the terminal housing cover and the cable connections are
tightened securely at the time of shipment to keep the terminal housing airtight. Do
not remove these screws or connections unless it is necessary to wire new cables or
replace old ones. Otherwise, it may cause gradual deterioration of circuit isolation
or cause damage to this product.
(4) Make sure the fluid to be measured will not freeze in the detector pipe. It may
cause damage to the detector pipe.

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Table of Contents
SAFETY PRECAUTIONS ····················································································· 2
Safety and Handling Precautions ··········································································· 5
1. Product Inspection and Storage ······································································ 7
1.1 Product Inspection ······················································································ 7
1.2 Storage ········································································································ 7
2. Overview ··········································································································· 8
3. Names of Parts ································································································· 9
4. Installation ······································································································ 10
4.1 Piping Connections ··················································································· 12
4.2 Wiring········································································································· 16
5. Operation ········································································································ 20
6. Maintenance and Troubleshooting ······························································· 21
7. Principle of Operation ··················································································· 24
8. Specifications ·································································································· 25
8.1 Specifications ···························································································· 25
8.2 Type Specification Code ··········································································· 27
9. Outline Dimensions ···························································································· 30

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1. Product Inspection and Storage
Upon arrival of the product package, open the package and check the items contained inside. If
you do not install the product shortly afterward, store the product and other related items in a
place as described in 1.2 below.
1.1 Product Inspection
The LF150 electromagnetic flowmeter detector is shipped in a container filled with
shock-absorbing materials. Open the package carefully and check as follows:
Make sure the following items are included in the package.
For the separate type (when a converter and detector are separated)
Electromagnetic flowmeter converter---------------------------------- 1 unit
Electromagnetic flowmeter detector ----------------------------------- 1 unit
Instruction manual-------------- Once each for the converter and detector
Inspect the detector for indications of damage that may have occurred during shipment.
Make sure the type and specifications of the detector (meter size, wetted materials,
protective coating, etc.) are in accordance with the ordered specifications.
If you can not find the items listed above or any problem exists, contact your nearest Toshiba
representative.
1.2 Storage
To store the LF150 detector after opening the package but you will install it at a later date,
select a storing place as follows and keep it under the conditions as described:
(1) Avoid the place where there is direct sunlight, rain or wind.
(2) Store the product in a well-ventilated place. Avoid the place where it is extremely high
in humidity, extremely high or low in temperature. The following environment is
recommended.
• Humidity range: 10 to 90% RH (no condensation)
• Storage temperature range: –15 to +65 °C
(3) Avoid the place where vibrations or mechanical shock occurs.
(4) Do not open the terminal housing cover of the detector. Open it only when you actually
wire cables. Leaving the cover open may cause gradual deterioration of circuit isolation.
Note that the detector whose cables are wired already at the time of shipment is not
needed to open the detector housing cover.

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2. Overview
The electromagnetic flowmeter measures the volumetric flow rates of electrically conductive
materials based on Faraday's Law of electromagnetic induction.
The device consists of two units: detector, through which the fluid to be measured flows, and
converter, which receives the electromotive force signals from the detector, then converts and
outputs the signals as the industry-standard output signals.
The detector and converter can be mounted separately as independent units.
Features
The LF150 flange-type electromagnetic flowmeter has the following features:
There is no pressure loss even if a flowmeter detector is installed in the pipeline.
It is possible to measure the flow of the fluid containing solid materials such as
sludge or slurries.
Even fluids containing solid abrasives or process slurry noise can be measured
with excellent performance.
No moving parts means a quick indication of flow and even a small amount of
flow can be measured with high accuracy.
Its size and weight was reduced further compared to the conventional type.
A submersible type is available as optional specification.

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3. Names of Parts
The outline drawing of the LF150 detector is shown in Figures 3.1.
Figure 3.1 Outline drawing of the LF150 detector
Terminal housing
Flow direction arrow
Terminal housing cover
Detector main body
Grounding Ring Safety against overturning
Detector nameplate Hanging hook
Cable connecting R(PT)1/2
For signal cable
For exciting cable

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4. Installation
Piping connections and cable wiring for the LF150 detector are described in the following
sections.
4.1 Piping Connections
The LF150 detector has flanges on both ends of detector main body. To mount the LF150,
refer to Figure 4.1 and follow the procedure below:
1. Place one of the flange packing next to the upstream(or downstream) pipe flange.
Align the holes of the packing with those of the flange so that the holes are not
obstructed.
2. Insert the LF150 detector in pipeline in accordance with the flow direction arrow
on the detector.
IMPORTANT
A crane is needed to carry and install the detector.
3. Insert the bolts, one at a time, through the hole in the upstream pipe flange and
packing, and then through the hole of the detector flange. Then thread nuts, one at a
time, on each end of the bolts, finger-tighten. This will help support the detector on one
side.
4. Insert the downstream (or upstream) packing between the detector flange and the
downstream pipe flange. Align the holes of the packing with those of the flanges so that
the holes are not obstructed.
5. Inert the bolts, one at a time, through the hole in the downstream pipe flange and
packing, and then through the hole of the detector flange. Then thread nuts, one at a
time, on each end of the bolts, finger-tighten. This will help support the detector.
6. While centering the detector with the longitudinal axis of the pipeline, tighten the
bolts with a wrench diagonally across in even increments. Bolt torque should be limited
to that shown in Table 4.1

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Table 4.1 Number of bolts, size and recommended bolt torque
JIS 10K
Meter size
[mm] No. of bolts
× Size × Length
[mm]
Bolt torque
[N· m]
(Note)
500 mm 20 ×M24 ×120 150～190
600 mm 24 ×M30 ×130 220～260
700 mm 24 ×M30 ×140 280～320
800 mm 28 ×M30 ×140 310～350
900 mm 28 ×M30 ×150 400～440
1000 mm 28 ×M36 ×160 600～640
Figure 4.1 The LF150 detector piping connections
Connection bolt
Downstream flange
Flow direction
Hanging hookUpstream flange
Packing
Safety against overturning
Detector

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4.1.1 Location
To select the installation site, follow the precautions described below:
Avoid the place where fluid runs in pulsating current.
Avoid the place within the immediate proximity of equipment producing electrical
interference (such as motors, transformers, radio transmitters, electrolyte cells, or other
equipment causing electromagnetic or electrostatic interference).
Avoid the place where excessive pipe vibration occurs.
Avoid the place where there is direct sunlight. If this is unavoidable, use an appropriate
shade. For information concerning a shade, contact Toshiba’s Engineering Department.
Avoid the place under corrosive atmospheres or under high humidity condition.
Avoid the place high or a constricted area where clearance for installation or maintenance
work is not provided.
Design piping so that the detector pipe is always filled with fluid, whether the fluid is
flowing or not.
The LF150 detector has no adjustable piping mechanism. Install an adjustable short pipe
where needed.
Chemical injections should be conducted on the downstream side of the detector.

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4.1.2 Precautions on Piping
(1a) Ideal Upstream Straight Pipe Length Installation Requirements
If various joints are used upstream of the detector outlet, the straight pipe
length as shown in Table 4.2 is required.
Table 4.1 Ideal straight pipe length on the upstream side
L: Required straight pipe length—straight pipe length plus half length of the detector.
D: Nominal bore size (diameter)
NOTES
The length of a reducer, if connected, can be counted as a part of the straight
pipe length.
No straight pipe length is needed on the downstream side. If a butterfly valve is installed
downstream of the detector, do not let the valve plate protrude into the pipe of the
detector.
L=5D L=10D
(
1
)
90°
b
ent
(2) Tee
(3) Diffuse
r
(4) Fully opened sluice
(5) Other valves (not fully opened)
L
L
L
L
L

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(1b) Optional “Mount Anywhere” Installation
Mount-Anywhere Technology:
With Toshiba’s unique, patented magnetic field distribution technology, the
meter is highly immune to upstream flow disturbances. A minimum of 3D
(diameter) length of upstream straight pipe from the flange is required to
maintain the performance specification.
NOTE
The test results were obtained and demonstrated at Toshiba’s flow calibration
facility, Fuchu Japan.

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(2) Pipe Orientation
The detector may be installed in horizontal, vertical or sloping pipe runs as shown in
Figure 4.2. However, except for horizontal installation, fluid should flow from lower
to upper directions. If no air bubble, Vertical down flow application are acceptable
under pressured piping conditions. See Figure 4.2.
.
Figure 4.2 Detector Piping Orientation
The electrodes should be positioned horizontally relative to the ground surface in any
piping installation. See Figure 4.3.
Figure 4.3 Installation position of the detector
Flow direction
(a) Horizontal pipe installation
(b) Vertical pipe installation
(c) Sloping pipe installation
Detector
Ground surface
(a)
(
c
)
(b)
A'
A
Electrodes
Detector Cross-section A - A'
Ground surface

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(3) Flow Direction
Install the detector in accordance with the flow direction arrow on the detector.
(4) Full Pipe Condition
Design an upright pipe run (Figure 4.4) or enough water head (Fig. 4.5) at the downstream
detector outlet if there is a possibility of the detector pipe being emptied.
Figure 4.4 Detector with an upright pipe run at the downstream outlet
Figure 4.5 Detector with enough water head at the downstream outlet
Upright pipe run
Detector
Detector

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4.2 Wiring
IMPORTANT
The grounding terminal of the LF150 detector must be grounded with less than 100
ohm ground resistance. A grounding wire should be as short as possible. Avoid a
common ground used with other equipment where earth current may flow. An
independent ground is preferable.
The flowmeter accuracy may be affected by the way wiring is conducted. Proceed with
wiring with following precautions:
Select the cable runs away from electrical equipment (motors, transformers, radio
transmitters or electrolyte cells) which causes electromagnetic or electrostatic interference.
Deterioration of the circuit insulation occurs if the converter interior or cable ends get
wet or humidified. It causes malfunction to the flowmeter or a problem of noise occurs.
Avoid a rainy day if the flowmeter is to be installed outdoors. Even if indoors, avoid
water from sprinkling over the device and try to finish the wiring as quickly as possible.
As the signal and exciting cables carry low-level signals, run these cables in thick walled
steel conduit separated from other large current wiring. Also do not run these cables in
parallel with other large current wiring.
For the detector whose cables are already wired at the time of shipment, the terminal
housing is closed securely to keep it airtight. Therefore, do not remove the terminal housing
cover or cables. If it is necessary to replace cables for repair work etc., see Sections 4.2.1
and 4.2.2
IMPORTANT
When you replace cables, use new packings for the housing cover and cable
connection.
Contact your nearest Toshiba representative to purchase these packings.
4.2.1 Cables
Use cables shown in Table 4.3 to wire the detector.
Table 4.3 Cables
Name Cable type Nominal
cross-sectional
area
Overall
diameter
Signal cable 2-wire shielded chloroprene
sheathed cable
( Rubber covered cable )
0.75 mm² 12 mm
Exciting
cable 3-wire chloroprene
sheathed cable
( Rubber covered cable )
1.25 mm² or
2 mm² (Note)
12 mm or
13 mm (Note)
Note: Nominal cross-sectional area and overall diameter for exciting cable are
dependent on the cable length. Refer to the type specification code table 8.4.

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4.2.2 Wiring Procedure
IMPORTANT
For the detector whose cables are already wired at the time of shipment, the following
wiring procedure is not needed. Therefore, do not open the terminal housing cover.
Signal Cable Termination
Use a signal cable specified in Table 4.3 and follow the procedure below referring to
Figure 4.6.
(1) Strip the cable sheath about 40 mm to expose two shielded wires.
(2) Unravel the shield screen at the base of each shielded wire to have an opening large
enough to extract the internal wire. Then extract the black wire and white wire
through its opening at the base of each shielded wire.
(3) Put the two shield screens (internal wires are already extracted) together into one
shield wire and put it through a heat-shrink tube. The heat-shrink tube should be heated later
when instructed to protect the shield screen from touching other wires causing a short
circuit.
(4) Strip each end of wire (except the shield wire) about 5 mm to expose stranded copper
wire and attach an M4-size ring lug terminal on each end of wire. The lug terminal
should have an insulating sleeve and the lug terminal should be pressed firmly onto the end
of each wire with a compression tool.
(5) Put the heat-shrink tube of the shield wire in place as shown in Figure 4.6 and heat it
with radiated heat using a soldering iron etc.
Figure 4.6 Termination of signal cable

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Exciting Cable
Use an exciting cable specified in Table 4.3 and follow the procedure below referring to
Figure 4.7.
(1) Strip the cable sheath about 40 mm to expose black, white and red wires.
(2) Strip each end of wire about 5 mm to expose stranded copper wire and attach an
M4-size ring lug terminal on each end of wire. The lug terminal should have an insulating
sleeve and the lug terminal should be pressed firmly onto the end of each wire with a
compression tool.
Figure 4.7 Termination of exciting cable
Cable Connections
Connect the terminated signal cable and exciting cable to the terminal board in the
terminal housing through the cable connections. There are two cable connections: for signal
cable
and for exciting cable. See Figure 3.1
(1) Remove the four retaining screws of the terminal housing cover shown in Figure
3.1. Then open the cover. The terminal board is located inside the housing.
(2) Remove the cable connection from the terminal housing. Then put the terminated
signal
cable through the cable connection, slip ring and packing.
(3) Put the above signal cable through the hole on the terminal housing and connect
each ring lug of the cable to the terminal board pin A, B and G as shown in Figure 4.6.
Then tighten the screws securely with a phillips screwdriver. Loose connection may
result in unsatisfactory flowmeter performance. Check the wiring by pulling each
wire after the connection to make sure the three wires are securely connected..
(4) After the terminal board connection, pull the cable outward so that the cable is
wired straight from the terminal without unnecessary winding.
IMPORTANT
Do not pull the cable too hard. If the sheath-stripped part goes as far as where the packing is
located, air may leave through there and the airtight structure may not function.