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Field Intelligent Device Series
Sanitary Electromagnetic Flowmeter
LF494/LF610
LF494/LF612
1S to 4S (25 to 100 mm)
Introduction
Sanitary electromagnetic flowmeters LF490 series are
designed for applications handling food and beverages.
Sanitary flowmeters must be structured in such a way
that operation and handling is simple, easy and
thorough for the purpose of sanitary control such as
cleaning (CIP/SIP), sterilization and drying. The
sanitary flowmeter has features provided with normal
electromagnetic flowmeters and by using sanitary
fittings for pipeline connections fluid does not remain
in any place along the detector pipeline. Therefore, it is
fit for flowrate measurement for food and beverages.
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 4–20mAdc current signal or
communication signal. With the unique patented
Mount-Anywhere magnetic field distribution
technology, the meter is highly immune to upstream
flow disturbances. Combined with a multi-functional
converter LF610 (combined type) or LF612 (separate
type) equipped with its patented Noise-Sentry original
noise-suppression circuit and advanced algorithms.
The LF490 has a very high tolerance to noise, giving
the unit a very stable output even for slurry fluid
measurement. 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 90, 180 and 270 degrees
without opening the cover.
Power suppl
Detector
I/O
Combined type
LF490/LF610
LF494/LF610F
Converter
Figure1. Configuration
Converter
Signal cable
Terminal box
Separate type
LF490/LF612
LF494/LF612F
Power
supply
I/O
Excitation cable
Detector
LF490/LF610
LF494/LF610F
LF490
LF494
LF612
LF612F
Figure2. LF490 series flowmeters
The AF900 hand-held terminal (HART*
Certification
number
Z01207
1
communicator) can be used to communicate with the
flowmeter from a remote place. PROFIBUS-PA*2
interface is available as an option.
*1: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF
Communication Foundation).
*2: 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.
(HART
TIC-LF494B
TIC-LF494B
Specifications
Overall Specifications
Measurement range in terms of flow velocity:
–1.0 ft/s to 0 – 32.8 ft/s (0 – 0.3 m/s to 0 –10 m/s)
0
– 0.3 ft/s to 0 – 1.0 ft/s (0 – 0.1 m/s to 0 – 0.3 m/s)
0
range is available optionally.
Accuracy:
* This pulse output error result is established under standard
operating conditions at Toshiba's flow calibration facility,
Fuchu Japan. (NIST Traceable).
* Individual meter measurement error may vary up to ±0.5% of
Rate at 1.64 ft/s (0.5m/s) or more and ±0.3% of rate ±0.039
inch/s (1mm/s) at 1.64ft/s (0.5 m/s) or less.
* Current output: plus ± 8µA (0.05% of span.)
*Refer to individual calibration data for each individual meter's
measurement error.
Fluid conductivity: 5µS/cm minimum
Fluid temperature:
14 to 248 °F (–10 to +120 °C)
Ambient temperature: – 4 to 140 °F (–20 to +60 °C)
Structure: IP 67 and NEMA 4X Watertight
Power consumption:
17 W(27VA) or less
19 W(29VA) or less (with PROFIBUS)
Conformance to European Community Directives:
EMC directive 89/336/EEC
The low voltage 93/68/EEC
3A standard (LF490 and LF494 detectors):
Approved for 3A standard with FDA approved
Teflon PFA lining.
Approved hazardous location certifications:
Model: LF494/LF610F and LF494/LF612F
cFMus explosion proof:
FM Class I, Division 2, Groups A,B,C, and D.
FM Class II, Division 2, Groups E, F and G.
FM Class III.
Detector and converter combination:
LF490/LF610 : Combined type for standard
LF490/LF612 : Separate type for standard
LF494/LF610F: Combined type with Ex approval
LF494/LF612F: Separate type with Ex approval
±0.2 % of Rate*
specification.
specification.
of Class I, Division 2 (cFMus).
of Class I, Division 2 (cFMus).
Note : The test results were obtained and demonstrated at
TOSHIBA's flow calibration facility, Fuchu Japan.
Model LF490 and LF494 Detectors
Fluid pressure:
–15 to 300 psi, or –1.0 to 20 bar (–0.1 to 2.0 MPa)
Note: This pressure is the allowable pressure for the
detector. The actual pressure will be restricted by
the type of connection method. For example, in
the case of sanitary clamp type, the maximum
pressure is 150 psi or 10 bar(1.0 MPa).
Note: The test pressure before shipping from the
factory is equal to twice the nominal pressure
rating of the customer specified flange
connection during 15 minutes.
Connection method:
Sanitary clamp type (ISO 2852)
Note:
Tri-clamp® can connect except meter size 4" (100 mm).
Tri-clamp® is a registered trademark for Tri-Clover Inc.
Principal materials:
Case — stainless steel
Linings — Teflon PFA (FDA approved)
Note: Teflon liners are mechanically retained for
full vacuum service.
Electrodes — 316L stainless steel (std.)
Note: Electrodes are electro-chemically polished
after mechanically buffed.
Sanitary fittings — 304 stainless steel (std.)
Seal gaskets — Silicon rubber (FDA approved)
Note: See Table 5 for optional materials and other
related information.
Measuring tube material — 304 stainless steel
Coating: no coating (std.)
Dimensions and weights: See Figures 3 to 6.
Cable connection port: for separate type detectors.
Cable glands —
LF490: Provided as standard, R(PT) 1/2
male screws.
LF494: Not provided, 3/4–14NPT male
screws are required.
Applicable diameter —
0.433 to 0.512 inch (11 to 13mm)
Mount-Anywhere Technology:
Thanks to TOSHIBA’s unique patented magnetic
field distribution technology, the meter is highly
immune to upstream flow disturbances.
A minimum of 1D (diameter) length of upstream
straight pipe from the flange is required to
maintain the performance specification.
2
Model LF610 and 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
• 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.
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 ccommunication.
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: Solidstate 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
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
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”
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
TIC-LF494B
HEX
HEX
Mag-Prover – Toshiba’s
3
TIC-LF494B
• 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 ports:
Cable glands —
LF610 and LF612 without cFMus Approval:
Provided as standard, OD of cableφ
11~13mm
Material Nylon 66
G (PF) 1/2 male screws.
LF610F and LF612F with cFMus Approval:
Not provided, 1/2–14NPT male screws are
required.
Applicable diameter —
0.433 to 0.512 inch (11 to 13mm)
Note: When PROFIBUS option is specified, cable gland size
is φ6～8mm 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 and Weights:
See Figure 8 (for Separate type)
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
4
)
)
Installation
Dimensions (Combined type)
Clamp connection Unit : inch(mm)
Note1: Clamp (Joint) size is different from meter size of
Note2: Cable glands are not provided for cFMus
For English unit
Meter size
(inch)
1 (1S) 2 S 4.33 9.17 2.87 Approx. 11
1-1/2 (1-1/2S)
2 (2S) 3 S 5.51 9.64 4.09 Approx. 15.4
3 (3S) 4 S 5.51 10.00 5.12 Approx. 19.8
4 (4S) 5 1/2 S 6.30 10.19 6.38 Approx. 26.5
For SI unit
Meter size
mm (inch)
25 (1S) 2 S 110 233 73 Approx. 5
40 (1 1/2S) 2 1/2 S 125 286 90 Approx. 6
50 (2S) 3 S 140 245 104 Approx. 7
80 (3S) 4 S 140 254 130 Approx. 9
100 (4S) 5 1/2 S 160 259 162 Approx. 12
Note: Tri-clamp® is available to use the same joint size
Note: 1 inch = 25.4 mm
Figure 3. LF490/LF610 and LF494/LF610F
8.86(225)
5.16(131
(L 2)
ØD1
5.63(143)1.42(36
L1
LF490 and LF494. See the following table.
approved type.
Joint size
(ISO2852)
2 1/2 S 4.92 11.25 3.54 Approx. 13.2
Joint size
(ISO2852)
(inch)
L1
L1
(mm)
L2
(inch)
L2
(mm)
D1
(inch)
D1
(mm)
Weight
(lbs)
Weight
(kg)
instead of ISO2852 clamp except meter size 100
mm (4").
Flowmeters
(Ferrules and Clamps not attached)
TIC-LF494B
Welding connection
8.86(225)
1.42(36)
Unit : inch(mm)
5.63(143)
Note1: L1 dimension is for the standard (Normal length)
type ferrule.
Note2: See Figure 7 for Ferrule dimensions.
Note3: Cable glands are not provided for cFMus approved
type.
For English unit
Meter size
(inch)
1 (1S)
1-1/2 (1-1/2S)
2 (2S)
3 (3S)
4 (4S)
Joint size
(ISO2852)
2 S
2 1/2 S
3 S
4 S
5 1/2 S
L1
(inch)
6.16 1.00 3.11
6.75 1.50 3.66
7.34 2.00 4.17
7.85 3.00 5.28
8.64 4.00 6.81
D1
(inch)
(inch)
D2
Weight
(lbs)
Approx. 13.2
Approx. 17.6
Approx. 19.8
Approx. 26.5
Approx. 35.3
For SI unit
Meter size
mm (inch)
25 (1S) 2 S 156.4 25.4 79 Approx. 6
40(1 1/2S) 2 1/2 S 171.4 38.1 93 Approx. 8
50 (2S) 3 S 186.4 50.8 106 Approx. 9
80 (3S) 4 S 199.4 76.3 134 Approx. 12
100 (4S) 5 1/2 S 219.4 101.6 173 Approx. 16
Note: Tri-clamp® is available to use the same joint size
Note: 1 inch = 25.4 mm
Joint size
(ISO2852)
instead of ISO2852 clamp except meter size 100
mm (4").
L1
(mm)
D1
(mm)
D2
(mm)
Weight
(kg)
Figure 4. LF490/LF610 and LF494/LF610F
Flowmeters
(Ferrules and Clamps attached)
5
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