Field Intelligent Device Series
Field Intelligent Device Series
Electromagnetic Flowmeter Converter
Sanitary Electromagnetic Flowmeter
LF232
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
the detector and then processes and converts the
signals into the 4–20 mA dc current signal.
The LF232 offers various outputs such as totalization
output and multi-range selection outputs. With it
patented Noise-Sentry original noise-suppression
circuit and advanced algorithms. The LF232 is highly
resistant to noise and provides a stable output even
when measuring fluids contain slurries. The
be used with a separately mounted detector such as the
LF150 or LF470. The LF232 can also be used with
conventional models of detectors.
The AF900 hand-held terminal (HART*
communicator) can be used to communicate with the
flowmeter from a remote place. See the
Communications signal specification for details about
HART protocol.
*1: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF
Communication Foundation).
detector, and amplifies the signals from
LF232 can
1
(HART
Specifications
Overall Specifications
Measurement range in terms of flow velocity:
Conbination LF150, LF470
0 –1.0 ft/s to 0 – 32.8 ft/s (0 – 0.3 m/s to 0 –10 m/s)
Fluid conductivity: 5µS/cm or more
Ambient temperature: -4 to 140 °F (-20 to 60 °C)
(Storage temperature: -13 to 149 °F (-25 to 65 °C))
Structure: IP67 and NEMA 4X Watertight
Figure 1. LF232 Converter
Accuracy: the accuracy is dependent on the type of
detector combined with the LF232. See the following
tables for accuracy when combined with specified
detectors.
・Detector combined
LF470 (Meter size 1/10", 1/6”, 1/4"
percent of range
0～50％ ±0.8％FS
50～100％ ±0.8％FS ±0.8％ of rate
・Detector combined
LF150 (Meter size 28” to 120” (700 to 3000 mm))
0.3–1.0m/s 1.0–10m/s
(2.5 to 6 mm))
Accuracy Flow rate as a
±0.4％FS
Accuracy: ±0.5 % of Rate*
* This pulse output error result is established under
standard operating conditions at Toshiba’s flow
calibration facility, Fuchu Japan.
* Individual meter’s measurement error may vary up
to ± 0.8 % of Rate at 3.28 ft/s (1.0 m/s) or more and
± 0.4% of Rate ±0.157 inch/s (4mm/s) at 3.28 ft/s
(1.0 m/s) or less.
* Current output: plus ± 8µA (0.05% of span).
* Refer to individual calibration data for each
individual meter’s measurement error.
TIC-LF232A
TIC-LF232A
Power supply:
One of the following can be selected
・100 to 240 Vac
(Allowable voltage 80 to 264 Vac, 50/60Hz)*
・24 Vdc
(Allowable voltage 21 to 27 Vdc)*
*1 When the 7
th
digit of specification code is “B”,
2
1
power supply is 100 to 120Vac
(Allowable voltage range is 80 to 132VAC, 50/60Hz)
*2 When the 7
th
digit of specification code is “B”,
24Vdc cannot be selected.
Power consumption:
17W (27VA) or less
When 7th digit of specification code is “A”)
(
35W (120VA) or less
(When 7th digit of specification code is “B”)
Converter Specifications
Input signals
Analog signal — the voltage signal from detector,
proportional to process flow rate.
Digital input DI (opt.)
(added when 9
th
digit of specification code is ”3”)
Voltage level: High level 20 to 30 V dc
Low level 2 V dc or less
Input resistance: 2.7 kΩ
Number of inputs: 2 points (DI1 and DI2)
DI functions:
For digital input function, either of the following
functions can be selected.
• Range switching
One Digital Input is used: switching between large
and small ranges of forward/reverse, 2-range
measurement.
Two Digital Inputs are used: switching between
ranges of single direction, 4-range measurement.
• Totalizer control input
Totalizer Start/Stop control or Reset/Start
•Output hold input
Fixed with set value for current output and pulse
output (loop check)
• Zero adjustment
Starts zero adjustment (on-stream at zero flow rate)
when DI voltage level goes low after remaining
high for 10 to 20 seconds.
Output signals
Current output:
4–20mAdc (load resistance 0 to 1KΩ)
Digital output (DO) — One point (std.) and three
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～DO4 (opt.)
(Added when 9
th
digit of specification code is “3”)
Out put type: Solid-state relay output (non polarity)
Number of outputs: 3 points
Output capacity: 150Vdc, 150mA maximum or
150Vac (peak to peak),
100mA maximum
DO functions—Four digital output function, either
of the following functions can be selected.
• Totalizer pulse output
DO1 or DO2 can be selected (Forward direction
pulse and reverse direction pulse can be assigned
independently)
In the case of DO1
Pulse rate: 3.6 to 3,600,000 pulses/h
Pulse width:Settable within the range of 0.3 to
500ms
In the case of DO2
Pulse rate: 3.6 to 360,000 pulses/h
Pulse width: Settable within the range of 4 to
500ms
• Rage switching output
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
• High/low limit alarm output
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
• Preset point output
Contact ON when totalizer count exceeds the set
value
Setting range: 1 to 99999999 count
• 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
2
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 1.25mm
2
is used
under standard installation condition.)
Note: HART (Highway Addressable Remote
Trans-ducer) is a communications protocol for
industrial sensors recommended by the HCF (HART
Commu-nication Foundation).
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.
Parameter settings—Parameters can be set asfollows
•IR Switches: Various parameters can be set without
opening the converter housing using 4 infrared
switches (password can be set)
•Zero adjustment: Zero point adjustment can be
started by pressing the switch in the converter.
•Digital communication: The AF 900 hand-held
terminal is needed to set parameters.
•Damping: 0.5 to 60 s (selectable in 1s increments)
“Field re-verification”
Mag-Prover – Toshiba’s
Zero span calibration tool allows unit to be
re-calibrated and verified using 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 output and
display will stay as follows when power fails.
Current output: 0 mA
Digital output: OFF (contact open)
LCD display : No display
TIC-LF232A
Surge protection: Surge protectors are installed in the
power supply, excitation circuit, current signal
output and digital I/O circuit.
Terminal block structure: 21-pole, screw connection
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
G (PF) 1/2 male screws.
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/s
2
in 4h in each
direction will not cause any defect to unit.
Note: If the flowmeter is intended to be used in a
location where vibration is applied
constantly contact Toshiba.
Dimension and Weights:
See Figure 2
3
TIC-LF232A
r
Installation
Dimensions
9.33 (237)
8.74 (222)
2.91 (74)
4-φ12 hole
6.10 (155)
Installation method
据付方法
･Installed by panel or pipe
据付けは、パネル(壁面)取付けか
･ Appointed bout and nut fo
パイプ取付けで行います。
installation is attached.
指定された取付用ボルト・ナットが付
属します。
In the case of 2B pipe installation
2Bパイプ取付けの場合
M10 U ボルト
M10 U bolts
Signal cable ground
Grounding terminal
Excitation cable ground
2.99 (76)
2.99 (76)
2.99 (76)
Output cable ground
1.57
(40)
2.17(55)
I/O cable ground
Weight : Approximately18 lb (8 kg)
15.75 (400)
Power supply cable ground
(including a mounting bracket)
14.57(370)
2B pipe
2B(50mm)パイプ
In the case of panel installation
パネル取付穴加工寸法
11 to 12 φhole
2.91 (74)
74
11～12φ 穴
(4ヵ所)
4 places
370
14.57 (370)
400
15.75 (400)
Figure 2. Separate type converter LF232
4
(
r
r
External Connections
Terminal box
Ⅳ wire
5.5mm
2
or more
Grounded with 100Ω o
less ground resistance
Thick walled steel conduit
Signal cable
(2-wire shielded hard-rubber sheathed cable)
(3-wire hard-rubber sheathed cable)
Detector
Excitation cable
Output cable
(CVV-S)
Digital I/O cable
(CVV-S)
Figure 3. External Wiring Diagram
TIC-LF232A
Power supply
CVV)
Power supply
Current output (4 to 20mA)
Digital input 2 (opt.)
Digital input 1 (opt.)
(20 to 30 Vdc)
Digital output 4 (opt.)
Digital output 3 (opt.)
Digital output 2 (opt.)
Digital output
Grounded with 100Ω o
less ground resistance
5
TIC-LF232A
Wiring Precautions
(1)Be sure to use thick walled steel conduit (22mm)
for signal and excitation cable wiring between the
detector and converter. Use flexible conduit at the
cable outlets of the detector and converter.
(2) Connect the grounding wire (IV wire 5.5mm² or
more) to a good earth ground (100Ω or less ground
resistance). Make the 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 allowable cable lengths between the detector
and converter for the separate type flowmeter
depend on the electrical conductivity of the object
fluid. See Figure 4 below.
(4) Digital output 1, digital output 2 to 4 , digital output
1 to 2 are insulated mutually.
300
200
100
ケーブル許容長さ
50
30
20
10
〔m 〕
5
Allowable cable length (m)
3
① LF130形、LF131形、LF150形検出器と接続の場合
(1)When combined with LF150.
② LF470形検出器と接続の場合
(2)When combined with LF470.
Figure 4. Electrical Conductivity and Cable length
53
Conductivity (µS/cm)
導電率〔μS/cm〕
①
20 30 50 100 200
10
②
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.
• Places where corrosive atmospheres exist.
• Places submerged under water.
• Place 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.
(2) Where smoke and steam may occur.
(3) Where exposed to direct snow, ice or mud.
Ordering Information
1. When ordering the LF232 converter, refer to
Tables 1 (Type Specification Code).
An entry must be made for each of the columns in
each of these tables.
2. Measuring range
3. I/O function specifications.
4. Ordering scope:
Actual flow calibration data: (required or not)
5. Specification of combined detector
6. Other scope:
Specification other than standard items.
Consult a Toshiba representative before ordering.
6
Table 1. Specification Code for converters (LF232)
Model Specification Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14
L F 2 3 2
1
A
A
A
B
C
E
1
3
1
2
Separate type converter
Purpose
Standard
Compatible detectors (Note1,2,3)
Medium to small-size detectors:
Meter size 1/10” to 18” (2.5 to 450 mm)
Large-size detectors:
Meter size 28” to 120” (700 to 3000 mm)
Mounting nuts and bolts
Panel, wall mounting (BNP material : SUS304)
Pipe mounting (BNP material : SUS304)
Digital input/output
Current output
+ Digital output points (1 point)
Current output
+ Digital output points (4 points) + Digital input points (2 points)
Communication function
HART communication
Power supply
100Vac-240Vac, 50/60Hz (Note 2)
24Vdc (Note 3)
Standard
Contents
Note 1: For applicable detector code, select one from the following table.
To combine with an existing detector, select one depending on the type of replaceable converters.
For combination with detectors not listed below, contact Toshiba.
Applicable
detector code
Applicable
detector
Applicable detector
(discontinued model)
334,
A
LF470 type
335 type (Converters of
types shown right)
337,
B
LF150 type
335 type (Converters of
types shown right)
Replaceable converters
372, LF200, LF220, LF420,
LF230* A type
373, 378, LF230* B type
TIC-LF232A
Note 2: When the 7th digit is “B” and power supply specification code is “1”, power supply specification is 100 to
120VAC.
Note 3: 24VDC can be specified only when the 7th digit is “A”.
7
TIC-LF232
/
ISO9001 and ISO14001 are certified.
Misuse of this product can result in damages to property or human injury.
Read related manuals carefully before using this product.
TIC-LF232A
Specifications are subject to change without notice.
Printed in Japan 2008-5 (TDOC)
© TOSHIBA Corporation 2008
All Rights Reserved.
http://www.toshiba.com/ind
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