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No. EJL-114B
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 4–20mAdc current signal or
communication signal. Thanks to the unique patented
magnetic field distribution technology, the meter is
highly immune for upstream flow disturbances.
Combined with multi-functional converter LF600
(combined type) or LF602 (separate type) equipped
with its original noise-suppression circuit and
arithmetic operation capability, LF410 has high
tolerance to noise, giving 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 128 x 128 dot matrix LCD display allows the LCD
rotated to 90, 180 and 270 degrees with a software.
The AF900 hand-held terminal (HART*
1
communicator) can be used to communicate with the
flowmeter from a remote place. PROFIBUS-PA*
2
interface is available as option.
*1: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF
(HART
Communication Foundation).
*2: PROFIBUS is the communication protocol for the
factory automation and process automation that
PROFIBUS Organization recommends. Instead of
analog control with a conventional analog signal
(4-20mA), it is one kind of the fieldbus which digitized
all signals. Flowmeters support PROFIBUS-PA.
Power
supply
Converter
I/O
Detector
Combined type
LF410/LF600
LF414/LF600
Converter
Power
supply
Signal cable
Detector
Separate type
LF410/LF602
LF414/LF602
Terminal box
I/O
Figure1. Configuration
LF410/LF600 LF410 LF602
LF414/LF600 LF414
Figure2. LF410 series Flowmeters
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 graph.
Pulse output:
Vs > 0.5 m/s (1.64 ft/s): +/
-
0.5 % of rate.
Vs < 0.5 m/s (1.64 ft/s): +/
-
0.3% of rate
+/
-
1 mm/s (0.039 inch/s).
Current output: plus +/
-
8 uA (0.05 % of
span)
Note: Span = Range in the magmeters.
0.0
1.0
2.0
3.0
4.0
5.0
0123
Flow Velosity (m/s)
Error
(% of rate)
Absolute figure
Accuracy
Note: The accuracy above is measured under standard
operating conditions using the weighing method
at Toshiba's flow calibration facility.
*3: CE mark is under application.
Field Intelligent Device Series
Electromagnetic Flowmeter
LF410 /LF600
LF410 /LF602
15 to 200 mm (1/2" to 8")
0
1
2 10
*3
Certification number
Z01207