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PDF LF400 Data sheet ( Hoja de datos )
| Número de pieza | LF400 | |
| Descripción | (LF400 - LF490) Sanitary Electromagnetic Flowmeter | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LF400 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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Field Intelligent Device Series
Sanitary Electromagnetic Flowmeter
LF490 / LF400
LF490 / LF420
25 to 100mm(1S to 4S)
Introduction
Sanitary electromagnetic flowmeter LF490/LF400 or
LF490/LF420 is 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, 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. Thus, 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
4–20 mA dc current signal. The LF490/LF400 is a
detector-converter combined type and the LF490/LF420
is a flowmeter with its detector LF490 and converter
LF420 separately mounted. The LF490 detector can
also be used with a separate type converter Model
LF230, which provides high performance such as
Digital Inputs (two points) along with Digital Outputs
(four points), and multi-functions.
The LF490 is approved for 3A standard and its teflon
PFA lining conforms FDA requirement.
The AF100 hand-held terminal or Model 275 HART
communicator can be used to communicate with the
flowmeter from remote places. See the following page
for the HART protocol specifications.
Figure 2. Separate type LF490 and LF420
Specifications
„ Overall Specifications
Measurement range in terms of flow velocity:
0 – 0.3 m/s to 0 –10 m/s (0 –1.0 ft/s to 0 – 32.8 ft/s).
0 – 0.1 m/s to 0 – 0.3 m/s (0 – 0.3 ft/s to 0 – 1.0 ft/s)
range is available optionally.
Accuracy: See the following table.
Flow rate as a
Accuracy
percent of 0.1– 0.3 m/s 0.3–1.0 m/s 1.0–10 m/s
range
(0.3–1.0 ft/s) (1.0–3.3 ft/s) (3.3–32.8 ft/s)
0 – 20%
— ±0.1% FS
20 – 100%
— ±0.5% of rate
0 – 50%
±0.25% FS
—
50 – 100%
±0.5% of rate
—
Note: The accuracy above is measured under standard
operating conditions at Toshiba's calibration facility.
Power supply
Converter
Converter Fluid conductivity: 5µS/cm minimum
Fluid temperature: –10 to +120 °C (14 to 248 °F)
Ambient temperature: –10 to +60 °C (14 to 140 °F)
Excitation cable
Structure: NEMA 4 (IP 67) Watertight
Power supply Power consumption: approximately 10 W(17VA)
I/O
Signal cable I/O
„ Model LF490 Detector
Detector
Combined type
flowmeter
LF490 / LF400
Detector
Separate type
flowmeter
LF490 / LF420
Figure1. Configuration
Fluid pressure: –0.1 to 2.0 MPa (–15 to 300 psi,
or –1.0 to 20 bar)
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 1.0 MPa (150 psi or 10 bar).
www.DataSheet4U.com
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EJL- 088A
1 page  
8QLW=##PP
150
74
4 -11 DIA.
holes
117
13
LCD
Port for excitation cable PortforI/Ocable
Grounding terminal
Portforpowercable
Portforsignalcable
Weight: approx. 3.5 kg (7.7 lb)
(including a mounting bracket)
Blindscrew
Figure 8. Separate type converter LF420
8QLW=##PP
150 4 -11 DIA. holes 117
74 13
LF490/LF400, LF490/LF420
Terminal box
Portforpowercable PortforI/Ocable
Grounding terminal
Portforexcitationcable
Reserved port
Port for signal cable
Weight: approx. 5 kg (11 lb)
(including a mounting bracket)
Figure 9. Separate type converter LF420
Note: 1 inch = 25.4 mm
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LF400.PDF ] | |
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