Toshiba LF470, LF612 User Manual

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Field Intelligent Device Series

Introduction

The electromagnetic flowmeter uses Faraday’s Law of
electromagnetic induction to measure the process flow.
The device consists of two units: a detector, through

the fluid to be measured flows and in which

which
low-level signals proportional to flow rates are obtained;
and a converter, which supplies excitation current to the
detector, and amplifies the signals from the detector and
then processes and converts the signals into the 4–20
mA dc current signal. The LF470 is a small meter size
detector designed to measure a small amount of fluids

Electromagnetic Flowmeter

containing substances such as chemicals.
The wetted materials for the LF470 are corrosion
resistant ceramic and platinum electrods and are
applicable to almost any kind of fluids. The LF470 is a
lightweight palm-sized detector.Combined with
multi-functional converter LF612 (separate type) and
LF232*

1

(separate type) equipped with its patented
Noise-Sentry original noise-suppression circuit and
advanced algorithms. The LF470 is highly resistant to
noise and provides a stable output even for fluids
containing slurries. IR (Infrared) switches enable

Specifications

 Overall Specifications

parameter setting of the converter without removing the
cover. Flow direction can be set in either way, and its
unique 128 x 128 dot matrix LCD display allows the
LCD to be rotated electronically to be rotated to 90, 180
and 270 degrees without opening the cover
The AF900 hand-held terminal (HART*
can be used to communicate with the flowmeter from a
remote place. PROFIBUS-PA*

3

interface is available

2

communicator)

as an option.

*1: Please refer to the document ”TIC-LF232”.
*2: HART protocol (Highway Addressable Remote

Transducer) is a communication protocol for industrial
sensors recommended by the HCF
Foundation).

*3: PROFIBUS is the communication protocol for factory

and process automation that the PROFIBUS Organization
recommends. Instead of analog control with a
conventional analog signal (4-20mA), it is the fieldbus
which digitizes all signals. Flowmeters support
PROFIBUS-PA.

Fluid to b
measured

Signal cable

Excitation cable

LF470
Detector

(HART Communication

Power supply

4-20mA dc outpu
and pulse output

LF612 or LF232
Converte

Figure 1. Configuration Diagram

LF470/LF612

1/10",1/6”,1/4" (2.5,4,6mm )

LF470

Figure 2. Electromagnetic Flowmeter

LF470/LF612

Certification number

Z01207

Measurement range in terms of flow velocity:

0–1.0ft/s to 0–32.8ft/s (0–0.3 m/s to 0–10 m/s )

Accuracy: The overall accuracy combined with the

LF612 or LF232 converter is shown in the
following table.

percent of range

50〜100％

0〜50％

Note: The accuracy is measured under standard
operating conditions at Toshiba's calibration facility.

1.0-3.3ft/s

(0.3-1.0m/s )

0.8% of FS

±

0.8% of FS

±

Fluid conductivity: 50µS/cm minimum

Fluid temperature:

Pipe connection material Fluid temperature

Stainless steel and other metals 14 to 248 °F

Polyvinyl chloride
(shock-resistant)

Ambient temperature: 14 to 140 °F (–10 to +60 °C )

Structure: IP67

Power consumption:

・When combined with the LF612 converter:
approximately 12W (20VA)

・When combined with the LF232 converter:
approximately 14W (25VA)

LF612

Accuracy Flow rate as a

(−10

(−10

3.3-32.8ft/s

(1.0-10m/s )

0.8% of rate

±

0.4% of FS

±

120℃)

℃〜＋

14 to 140 °F

℃〜＋60℃

)

TIC-LF470B

TIC-LF470B

2

 Model LF470 Detectors

Fluid pressure:

-

15 to 150 psi, or -1.0 to 10 bar

(-0.1 to 1 MPa)

Principal materials:

Measurement tube – Alumina ceramics
Electrodes – Platinum
Pipe connection port:

Standard – 316 stainless steel

Option – Ti (titanium),

Polyvinyl chloride (shock-resistant)+
Ta (Tantalum) for grounding plate,
Polyvinyl chloride (shock-resistant)+
Pt-Ir grounding plate,
Hastelloy C (Equivalent)

Dedicated preformed cables:

･Signal cable

– 2-wire shielded chloroprene

sheathed cable
Overall length: 0.28 inch (7mm)
Length: 0.20 inch (5m)

･Excitation cable – 3-wiren chloroprene sheathed

cable

Overall length: 0.28 inch (7mm)

Length:

0.20 inch (5m)

Coating: phthalic acid resin coating pearl-gray

colored

Weight: approximately 2.2 lb (1.0 kg)

(for each size excluding cables)

 Model LF612 converters

Input signals

Analog signal — the voltage signal from detector,

proportional to process flow rate (for LF612
separate type converter).

Digital input DI (opt.)

Signal type: 20 to 30Vdc voltage signal
Input resistance: 2.7kΩ
Number of inputs: one point

DI function — One of the following functions can be

assigned to the optional DI signal.

Range switching — Selects either the higher or lower

range in the unidirectional or bidirectional 2-range
setting.

Totalizer control — Starts and stops the built-in

totalizer.

Fixed-value outputs —Outputs fixed-values for

current and pulse outputs.

Zero adjustment — Executes zero adjustment

(on-stream at zero flow rate).

Output signals

Current output:

4–20mAdc (load resistance 0 to 750Ω)

Note: The current output cannot be used with the

PROFIBUS-PA communication.

Digital outputs — One point (std.) and one more

point is optionally available as follows.

Digital output DO1 (std.):

Output type: Transistor open collector
Number of outputs: One point
Output capacity: 30Vdc, 200mA maximum

Digital output DO2 (opt.):

Output type:

Solid-state relay output (non polarity)
Number of outputs: One point
Output capacity: 150Vdc, 150mA maximum

or 150Vac (peak to peak), 100mA maximum

DO1 and DO2 functions — One of the following

functions can be assigned to DO1 (std.) and/or
DO2 (opt.)

• Pulse output (available only for DO1, DO2)
Pulse rate: 3.6 to 36,000,000 pulses/hr (DO1)

3.6 to 360,000 pulses/hr (DO2)

(Over 3,600,000 pulses/hr, auto-setting)
Pulse width: 0.5 to 500ms (but less than half of
the period for 100% flow rate)

Note: The same and simultaneous pulse is not

available between DO1 and DO2.)

• Multi-range selection outputs (Note 1)

• High, High high, Low, and/or Low low alarm

outputs (Note 2)

• Empty pipe alarm output

• Digital Output Active Status (DO1 and DO2)
(Note 2)

• Preset count output

• Converter failure alarm output

Note 1: Two outputs (DO1 and DO2) are needed for

4-range switching and forward/reverse 2-range
switching.

Note 2:Normal Open (default set) or Normal Close is

selected for alarm outputs when programming.

When power failure occurs, unit will be fault to
Normal Open.

TIC-LF470B

Communications output ：

• HART (std.) — Digital signal is superimposed on

4–20mAdc current signal as follows:
Conforms to HART protocol
Load resistance: 240 to 750Ω
Load capacitance: 0.25µF maximum
Load inductance: 4mH maximum

• PROFIBUS(opt.)

Protocol: PROFIBUS-PA
Baud rate: 31.25kbps
Bus voltage: 9-30VDC

Consumption electric current of bus: less than 16mA

Manufacture Ident-No.: 093B
Standard Ident-No.: 9740

HEX

HEX

Slave address: 0-126 (Default address is 126)
Profile: Profile Ver.3.01 for Process Control

Devices

Function blocks: AI(Flow)×1 , Totalizer×1

LCD display:

Full dot-matrix 128×128 dot LCD display
(back–light provided)
The data on the LCD inside the converter can rotate
to 90, 180, and 270 degrees by a software, without
rotating the indicator itself. (Combined type only)

Parameter settings — Parameters can be set as

follows:

• IR Switches: Three key switches are provided to
set configuration parameters.

• Digital communication: The AF900 hand-held
terminal or PROFIBUS is needed to set
parameters.

• Zero adjustment: Zero point adjustment can be
started by pressing the switch in the converter.

• Damping: 0.5 to 60 seconds (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.)

Conditions when power fails:

Parameter setting values are stored in non–volatile
memory and the values will be restored when the
power returns to normal condition. The outputs and
display will remain as follows when power fails.

• Current output: 0mAdc

• Digital output: OFF

• LCD display: No display

• PROFIBUS: No communication

Power supply:

One of the following can be selected:

• 100 to 240Vac, 50/60Hz (std.)
(allowable voltage 80 to 264Vac)

• 24Vdc (allowable voltage 18 to 36Vdc)

• 110Vdc (allowable voltage 90 to 130Vdc)

Surge protection:

Arresters are installed in the power supply and a
current signal output circuit to help protect the meter
from lightning and improve personnel safety.

Case: Aluminum alloy (equal to IP 67)

Coating: Acrylic resin-baked coating, pearl–gray

colored

Cable connection port:

Cable glands —

Provided as standard, OD of 11 to 13mm
Material Nylon 66
G (PF) 1/2 male screws

Applicable diameter —

0.433 to 0.512 inch (11 to 13mm)

Note: When PROFIBUS option is specified, cable gland size is φ

6～8mm for signal cable, φ11～13mm for power cable

Vibration resistance:

No resonance to the following levels of vibration:

• 10 to 150Hz with acceleration of 9.8m/s

2

• Vibration of 30Hz with 29.4 m/s2 in 4h in each
direction will not cause any defect to unit.

Note: Avoid using the flowmeter in an environment with

constant vibration.

Dimensions :

See Figure 5

MTBF:

Converter: 220,000 hours (25 years) at 77 °F (25 °C)

based on strict military specification
MIL-HDBK-217F

Detector: 350,000 hours (40 years) at 77 °F (25 °C)

based on strict military specification
MIL-HDBK-217F

3

TIC-LF470B

4

(

)

–

φ

(

)

7.87(

00 )
(

)

)

l

N

N

N

Installation

 Dimensions

2.20( 56)

4 .02 ( 1 02 )

Excitation ca ble

0.28(φ7)

Figure3. LF470 Dimensions

5.94(151)

2. 91(74 )

74 ±0.3

Sign al cabl e
φ0.28 (φ7)

151

Unit : inch (mm)

φ1.93(φ4 9)

1.46 (37)

.76(70)

*

This length becomes 78mm if the pipe

*

co nn ection p ort t hread is Rc(PT)1 /2

an d Rc (PT )3/4.

1.18( 30)

2-M4
(Mo u nt in g sc re w h o les )

4－φ11

4

0. 43(φ11)

Attachment

取付金具

LCD display

LCD 表示器

15 1

151

5.94

IR S wi tc h

赤外線スイッチ

Cable ground

ote: 1 inch = 25.4mm

178

178

7.01

2

200

1.42(36)

156

6.14

(36) 156

Figure 5. Separate type converter LF612

Unit : inch (mm)

.39(86)

2.95(7 5)

1.18(30)

**

1.18( 30 )

1.57(40)

* *

**

Mounting screws

Detector mounting plate
(4mm thick)

2- φ0.24(φ6 ) hole

4-φ0.20(φ5) hole

ote: 1 inch = 25.4mm

If a mounting plate is needed for the LF470, fix the plate (a)
above to the bottom of the LF470. Depending on which pair of
screw holes used, the mounting angle changes by 90°.

Figure4. LF470 Mounting Board

25

0.98(25) 3.23(82)

82

0.5 1(13

13

Excitation cable ground

励磁ケーブルグランド

Signal cable ground

信号ケーブル
グランド

Blind screw

矢視 A

Unit : inch (mm)

I/O cable ground

電流出力ケーブルグランド

Po wer s upp ly cab le g round

電源ケーブルグランド

封止栓

ote: 1 inch = 25.4mm

Gr ound termin a

接地端子

(M4)

(M4)

取付金具

0

Ω

0

Ω

Separate type LF470/LF612 flowmeter

Terminal board

Thick walled steel conduit

IV wire

2

or more

5.5 mm

Grounded with 100Ω or less
ground resistance

Power switch
(External double-pole power switch )

[Instrument panel : ordered separately]

TIC-LF470B

Signal cable
(2-wire shielded hard-rubber

sheathed cable)

(3-wire shielded hard-rubber cable)

Figure 6. Separate type LF470/LF612 flowmeters wiring Diagram

Grounded with 10
ground resistance

Power supply

Current output (4~20mAdc)
or PROFIBUS

Digital output 1

Connected detector

Excitation cable

Power cable

(CVV)

Digital input cable

(CVV-S)

Signal common for DI and DO

Digital output 2

Digital input
(20~30Vdc)

Grounded with 10
ground resistance

Table 1. LF612 Converters Signal Table

Symbol Description Cable

L1 (＋)
L2 (－)

GND Ground (for arrester)

FG Frame ground

DI Digital Input (20～30Vdc)

DO1 Digital Output 1
DO2 Digital Output 2

COM Signal Common for DI, DO1, DO2

＋

－

X
Y Excitation Output

E
A
B Signal Input
G

Power supply Power cable (CVV)

Current Output (4～20mAdc)

or PROFIBUS

I/O cable (CVV-S)

Excitation cable

Signal cable

or less

or less

5

TIC-LF470B

6

 Wiring Precautions

(1) Connect the following two cables correctly:

1) signal cable (on the right facing the LF470)

2) excitation cable (on the left facing the LF470)

(2) Do not bend apply excessive force to these cables.

Piping Precautions



(1) Connect the fluid pipe to the pipe connection port

using a joint that matches the Rc (PT) female screw.
Use seal tapes when connecting the pipe to the port
to prevent a fluid leakage. Do not tighten the
connection screw too much.

(2) Design piping so that the detector’s pipe is always

filled with the fluid to be measured, whether the
fluid is flowing or not.

(3) The fluid to be measured must be held still in the

pipe when the LF470 is being adjusted. If the fluid
can not be stopped after the LF470 installation,
install a bypass pipe in parallel with the LF470
flowmeter.

Meter size



To select the meter size:

See Table 3 to 4 and find meter sizes within the
velocity of 0.3 to 32.8 ft/s (0.1 to 10m/s) for a
specified full-scale (measuring range high limit)
flow. Select one that has its full-scale velocity
between 3.0 and 10 ft/s (1 and 3m/s).

Note: Make sure the full-scale flow rate used for the final

planning stage stays within 32.8 ft/s (10m/s) in
terms of flow velocity.

Table 2. Meter size and Flow Velocity (SI unit)

Unit:gal/min

Meter size

(inch)

1/10” 0.02334 0.07115 0.2372 0.7781

1/6” 0.05975 0.1821 0.6071 1.992
1/4” 0.1344 0.4098 1.3660 4.482

0.98 ft/s 3 ft/s 10 ft/s 32.8 ft/s

Table 3. Meter size and Flow Velocity(US unit)

Unit:L/min

Meter size

(mm)

2.5 0.08835 0.2945 0.884 2.945
4 0.2262 0.7540 2.262 7.540
6 0.5088 1.6967 5.090 16.967

0.3m/s 1m/s 3m/s 10m/s

 About establishment environment

Do not store or install the flowmeter:

• Where there is direct sunlight.

• 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 a sloped floor. To put the flowmeter
temporarily on the floor, place it carefully with
something, such as a block, 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.

(2) Where smoke and steam may occur.

(3) Where exposed to direct snow, ice or mud.

Ordering Information

1. When ordering the LF470 flowmeters, refer to
Tables 4 to 5 (Specification Code).
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. I/O function setting

5. Ordering scope:
Flow calibration data: (required or not)

6. Other items
Specifications other than standard items

Consult a Toshiba representative before ordering when
choosing materials of the wetted parts such as lining,
electrodes, and grounding rings.

.

TIC-LF470B

Table 4. Specification Code ( LF470 Detector )

Model Specification Code

1 2 3 4 5 6 7 8 9 10 11 12 13 14
L F 4 7 0 LF470 Flowmeter

Meter size
2 1/10" (2.5 mm )
4 1/6" (4 mm )
6 1/4" (6 mm )
Converter ( Separate type ) combined
D LF612
E LF232 (Note 1)
Pipe connection port (adapter)
A Rc (PT) 1/4 female screw (standard)
B Rc (PT) 1/8 female screw
C Rc (PT) 3/4 female screw
D

Pipe connection material

A 316 stainless steel (standard)
D Ti (titanium)
E Polyvinyl chloride (shock-resistance)+

F Polyvinyl chloride (shock-resistance)+

H Hastelloy C (Equivalent)
Packing used between main body and pipe

C Acid-resistant ceramic
D Alkali-resistant ceramic
G Ammonia-resistance
Mounting
A Not provided
B Provided, 304 stainless steel
Flow and calibration velocity range
A 1.0 to 32.8 ft/s (standard range calibration)
B 1.0 to 32.8 ft/s (specified range calibration)
Cable length
A 5m (cable dia.7mm)
1 10m (cable dia.7mm)
2 15m (cable dia.7mm)
3 20m (cable dia.7mm)
4 25m (cable dia.7mm)
5 30m (cable dia.7mm)
B 5m or more

Coating
A Phthalic acid resin coating pearl-gray colored (standard)
Z Other

Rc (PT) 1/2 female screw
E
F

G

NPT1/4 female screw
NPT3/8 female screw
NPT1/8 female screw

Ta (Tantalum) for grounding plate

Pt-Ir for grounding plate

connection adapter

(extension dia. 12mm+Scotch cast connection)

Description

Note 1: Please refer to document number “TIC-LF232” about converter LF232.

7

TIC-LF470B

/

Model Specification Code

1 2 3 4 5 6 7 8 9 10 11 12 13 14

L F 6 1 Electromagnetic flowmeter converter

2 Separate (Remote) type

B Shape

E Instruction manual

Code explanation: : Standard : Option

Table 5. Specification Code for converters

A

Converter mounting fitting

A

C
E

1
2

1
2

1
2
3

Contents

Purpose

Standard

Separate type with case

None
Panel, Accessory for wall mounting (BNP material: SUS304)
Accessory for pipe installation (BNP material: SUS304)

Digital input/output

Digital output points 1 (DO1)
Digital output points 2 (DO1+DO2) +Digital input point 1 (DI)

Current output and Communication function

Current output + HART communication
PROFIBUS communication (Current output is not usable)

Power supply

100Vac-240Vac, 50/60Hz
24Vdc
110Vdc

English

LF612

type























ISO9001 and ISO14001 are certified.

Misuse of this product can result in damage to property or human injury.
Read related manuals carefully before using this product.

TIC-LF470B

Specifications are subject to change without notice.

Printed in Japan 2008-5 (TDOC)

© TOSHIBA Corporation 2008

All Rights Reserved.

http://www.toshiba.com/ind