Toshiba LF470 User manual

TIC-LF470H
Field Intelligent Device Series
Electromagnetic Flowmeter LF470/LF622
1/10",1/6”,1/4" (2.5,4,6mm )
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
which the fluid to be measured flows and in 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
containing substances such as chemicals.
The wetted materials for the LF470 are corrosion
resistant ceramic and platinum electrodes and are
applicable to almost any kind of fluids. The LF470 is a
lightweight palm-sized detector. Combined with
multi-functional converter LF622 (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
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
*1: Please refer to the document ”TIC-LF232”.
*2: HARTprotocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF(HART Communication
Foundation).
** DevComm2000 Smart Device Communicator available
through TIC for performing HART device configurations on PC
or laptop.
*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.
*4: Modbus is the communication protocol that Modicon Inc.
developed. Physical layer is RS485.
* Modbus is the communication protocol that Modicon Inc.
developed. Physical layer is RS485.
Figure 2. Electromagnetic Flowmeter
LF470/LF622
Specifications
Overall Specifications
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
LF622 or LF232 converter is shown in the
following table.
Flow rate as a
percent of range Accurac
y
1.0-3.3ft/s
(
0.3-1.0m/s
)
3.3-32.8ft/s
(
1.0-10m/s
)
50～100％ ±0.8% of FS ±0.8% of rate
0～50％ ±0.8% of FS ±0.4% of FS
Note: The accuracy is measured under standard
operating conditions at Toshiba's calibration facility.
Fluid conductivity: 50µS/cm minimum
Fluid temperature:
Pi
p
e connection material Fluid tem
p
erature
Stainless steel and other metals 14 to 248 °F
(－10℃～＋120℃)
Polyvinyl chloride
(shock-resistant) 14 to 140 °F (－10℃～＋60℃)
Ambient temperature: 14 to 140 °F (–10 to +60 °C )
Structure: IP67
Power consumption:
・When combined with the LF622 converter:
Standard:10W(14VA)
at AC100V and Excitation current:0.2A
MAX:15W (22VA)
MAX:17W(24VA) with PROFIBUS
Fluid to b
e
measure
d
Signal cable
Excitation cable
Power supply
4-20mA dc outpu
t
and pulse output
Figure 1. Configuration Diagram
LF470 LF622
Certification number
Z01207
LF622 or LF232
Converter
LF470
Detector

TIC-LF470H
2
・When combined with the LF232 converter:
Approximately 14W (25VA)
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
Overalllength:0.28inch(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 LF622 converters
Input signals
Analog signal —the voltage signal from detector,
proportional to process flow rate (for LF622
separate type converter).
Digital input DI
Signal type: 20 to 30Vdc voltage signal
Input resistance: 2.7k
Number of inputs: one point
Note: DI cannot be used with the Modbus
communication.
DI function — One of the following functions can be
assigned to the DI signal.
Range switching — Selects either the higher or lower
range in the unidirectional or bidirectional 2-range
setting.
Totalizer control — ‘Starts and stops’ or ‘Rest and
start’ the built-in totalizer.
Fixed-value outputs —Outputs fixed-values for
current and pulse outputs for loop check.
Zero adjustment — Executes zero adjustment
(on-stream at zero flow rate).
Output signals
Current output:
4–20mAdc (load resistance 0 to 750)
Note: The current output cannot be used with the
PROFIBUS-PAcommunication.
(Refer table 6 for details)
Digital outputs — Two points are available as
follows.
Digital output DO1 :
Output type: Transistor open collector
Number of outputs: One point
Output capacity: 30Vdc, 200mA maximum
Note: DO1 cannot be used if Modbus communication
connection is 3 lines.(Refer table 6 for details)
Digital output DO2 :
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
Note: DO2 cannot be used with the Modbus
communication.(Refer table 6 for details)
DO1 and DO2 functions — One of the following
functions can be assigned to DO1 and/or DO2.
• Pulse output (available only for DO1, DO2)
Pulse rate: Max 10kHz (10,000pps) (DO1)
Max 100Hz ( 100pps) (DO2)
(Over 1kpps, auto-setting)
Pulse width: 0.3 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-LF470H
3
Communications output ：
• HART (std.) — Digital signal is superimposed on
4–20mAdc current signal as follows:
Conforms to HART protocol
Load resistance: 240 to 750
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.: 093BHEX
Standard Ident-No.: 9740HEX
Slave address: 0-126 (Default address is 126)
Profile: Profile Ver.3.01 for Process Control
Devices
Function blocks: AI(Flow)×1 , Totalizer×1
•Modbus (opt.)
Physical layer : RS485
Protocol : Modbus
Mode : RTU
Baudrate : 4800, 9600, 19200bps
Data length : 8bit
Parity bit : None, Odd, Even
Stop bit : 1bit, 2bit
Error check : CRC-16
Max. station number : 32(with Master device)
Max. cable length : 1.2km (Note)
Note: This length is specification of 3 line
connection.
LCD display:
Full dot-matrix 128×128 dot LCD display
(back–light provided)
Parameter settings — Parameters can be set as
follows:
• IR Switches: Three key switches are provided to
set configuration parameters.
• Digital communication: HART or PROFIBUS or
Modbus is needed to set parameters.
• Zero adjustment: Zero point adjustment can be
started by pressing the switch in the converter.
• Damping: 0.1 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
• HART: No communication
• PROFIBUS: No communication
• Modbus:: No communication
Power supply:
One of the following can be selected:
• 100 to 240Vac, 50/60Hz
(allowable voltage 80 to 264Vac)
110Vdc
(allowable voltage 90 to 130Vdc)
• 24Vdc (allowable voltage 18 to 36Vdc)
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, Outer Diameter of cableφ11
to 13mm
Material Nylon 66
G (PF) 1/2 male threads.
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/s2
• 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

TIC-LF470H
4
Installation
Dimensions
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 anglechanges by 90°.
2. 20( 56)
1. 46( 37)
2
. 76( 7 0 )
This length becomes 78mm if the pipe
connection port thread is Rc( PT) 1/ 2
and Rc( PT) 3/ 4.
Sign al c able
φ0. 2 8 ( φ7 )
Ex c ita tion c a ble
φ0 . 2 8 ( φ7)
2-M4
( M o u nt in g s c r e w h o le s )
4 . 02 ( 102 )
1. 18 ( 3 0 )
φ1. 93 ( φ4 9)
*
*
Figure3. LF470 Dimensions
1. 18 ( 30 )
2. 95( 75)
3
.39(86)
**
**
**
2- φ0. 24( φ6) hole
4 - φ0. 2 0 ( φ5) h o le
Detector mounting plate
( 4 mm t hic k)
Mounting screw s
1. 18 ( 3 0 ) 1. 57
(
40
)
Figure4. LF470 Mounting Board
Figure 5. Separate type converter LF622
Unit : inch (mm)
Note: 1 inch = 25.4mm
Note: 1 inch = 25.4mm
Unit: inch (mm)
Weight: 7 lb (3.5 kg)
N
ote: 1 inch = 25.
4
m
m
Unit : mm (inch)
N
ote: Cable glands are not provided for LF622F cFMus approved type.
Refer to the part Cable connection port at detector.
LCD display
Attachment
I/O cable ground
Excitationcable ground
Power supply
cable ground
Optioncableground
Signalcableground
IR Switch
Figure3. LF470 Dimensions

TIC-LF470H
5
Figure 6. Separate type LF470/LF622 flowmeters wiring Diagram
Table 1. LF622 Converters Signal Table
Symbol Description Cable
L1 (＋) Power supply Power cable
L2 (－)
GND Ground (for arrester)
FG Frame ground
DI Digital Input (20～30Vdc)
I/O cable
DO1 Digital Output 1
DO2 Digital Output 2
COM Signal Common for DI, DO1, DO2
＋Current Output (4～20mAdc)
or PROFIBUS
－Shielded cable for
PROFIBUS-PA
X Excitation cable
(for LF622, LF622F only)
Y Excitation Outpu
t
E
A Signal cable
(for LF622, LF622F only)
B Signal Input
G
Note: Symbol of the terminal is changed as follows for Modbus.
DO2 →T+, DI →T-, COM →TG
Symbol Description Cable
T+ Modbus(+) Twist-pair polyethylene
insulated vinyl sheath cable
(JKEV,AWG24(0.2mm2))
T- Modbus(-)
TG Modbus(GND)
Separate type LF470/LF622 flowmeter
G
roun
di
ng w
i
t
h
100
Ω
or
l
ess
g
round resistance
I
nstrument pane
l
:
O
r
d
ere
d
separate
ly
I/O cable
Grounding with 100Ωor less
ground resistance
Ⅳwire 5.5mm
2
or more
C
urrent output
(4
～
20
m
Ad
c
)
or PROFIBUS
P
ower supp
l
y
Power cable
Di
g
i
ta
l
i
nput
(
20～30Vdc
)
Si
gna
l
common
f
or
DI
an
d
DO
Digital output 1
Di
g
i
ta
l
output
2
G
roun
di
ng w
i
t
h
100
Ω
or
l
ess
ground resistance
or Modbus
Signal cable
(2-wire shielded hard-rubber sheathed cable)
Connected detector
Excitation cable
(3-wire shielded hard-rubber cable)
Thick walled steel conduit
Power switch
(External double-pole power switch)

TIC-LF470H
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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 2 to 4 and find meter sizes within the
velocity of 0.3 to 32.8 ft/s (0.1to10m/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) 0.98 ft/s 3.0 ft/s 10 ft/s 32.8 ft/s
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
Table 3. Meter size and Flow Velocity
(English unit) Unit:L/min
Meter size
(mm) 0.3 m/s 1.0 m/s 3.0 m/s 10 m/s
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
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-LF470H
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Model Specification Code Description
1 2 3 4 5 6 7 8 9 10 11 12 13 14
L F 4 7 0 LF470 Flowmeter
Metersize
2 1/10" (2.5 mm )
4 1/6" (4 mm )
6 1/4" (6 mm )
MountingStyle
D Detector / Converter separate type(LF470/LF622)
Pipe connection port (adapter)
A Rc (PT) 1/4 female screw (standard)
B Rc (PT) 1/8 female screw
C Rc(PT)3/8femalescrew
D
E
F
G
Rc (PT) 1/2 female screw
NPT1/4 female screw
NPT3/8 female screw
NPT1/8 female screw
Pipeconnectionmaterial
A 316 stainless steel (standard)
D Ti(titanium)
E Polyvinyl chloride (shock-resistance)+
Ta (Tantalum) for grounding plate
F Polyvinyl chloride (shock-resistance)+
Pt-Ir for grounding plate
H Hastelloy C (Equivalent)
Packing used between main body and pipe
connection adapter
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)
Cablelength
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 5mormore
(extension dia. 12mm+Scotch cast connection)
Coating
A Phthalic acid resin coating pearl-gray colored (standard)
ZOther
Table 4. Specification Code ( LF470 Detector )

TIC-LF470H
TIC-LF470H
Note 1: When PROFIBUS communication is provided, current output(4-20mA) and HART communication cannot be used.
When Modbus communication is provided, digital output points 1(DO1) and digital output points(DO2),
digital input point 1(DI), HART communication cannot be used.
Refer Table 6 for more details.
Note2: Select 110Vdc for test report inspected under the condition of 110Vdc.
Table6. Communication functions and output selection table
Selection of Function Availability of outputs
Code
(10th digit)
Selected
Communication 4-20mAdc DO1 DO2 DI
1 HART    
2 PROFIBUS Ｘ 
3 Modbus 
(Note) ＸＸ
Code explanation: :Available Ｘ:Not Available
Note: When digital output 1 function and Modbus communication function are used at one time, TG (signal ground) of the
Modbus communication function cannot be connected (2 line connection).
Table 5. Specification Code for converters
Code explanation: :Standard : Option
Model Specification Code Contents LF622 type
1 2 3 4 5 6 7 8 9 1011121314
L F 6 2 Electromagnetic flowmeter converter
2 Separate (Remote) type 
A Purpose Standard

A Shape Separate type with case

A
C
E
Converter mounting fitting
None
Panel, Accessory for wall mounting (BNP material: SUS304)
Accessory for pipe installation (BNP material: SUS304)



2 Digital input/output Digital output points 2 (DO1+DO2) +Digital input point 1 (DI)

1
2
3
Current output and Communication function(Note1)
Current output + HART communication
PROFIBUS communication
Modbus (RS485) communication



1
2
3
Power supply(Note2)
100Vac-240Vac 50/60Hz, 110Vdc
24Vdc
110Vdc



E Instruction manual English

Code explanation: : Standard : Option – : Not available
Misuseof thisproduct canresultindamageto property or human injury.
Read related manuals carefully beforeusingthis product.
ISO9001 and ISO14001 are certified. Specifications are subject to change without notice.
Printed in Japan 2011-6 (TDOC)
© TOSHIBA Corporation 2011
All Rights Reserved.
http://www.toshiba.com/ind/