Toshiba LF410 Manual

Field Intelligent Device – Mount-Anywhere Series - Wafer
Electromagnetic Flowmeter
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. The meter features a Mount- Anywhere
magnetic field distribution technology, the meter is
highly immune to upstream flow disturbances.
Combined with a multi-functional converter LF620
(combined type) or LF622 (separate type) equipped
with its patented Noise-Sentry original noise-
suppression circuit and advanced algorithms. The
LF410 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.
*1: HART protocol (Highway Addressable Remote
Transducer) is a communication protocol for industrial
sensors recommended by the HCF (HART
Communication Foundation).
** DevComm2000 Smart Device Communicator available for
performing HART device configurations on PC or laptop is
available through the supplier .
*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
fieldbus which digitizes all signals. Flowmeters support
PROFIBUS-PA.
* Modbus is the communication protocol that Modicon Inc.
developed. Physical layer is RS485.
Converter
I/O
Terminal box
Power
Detector
supply
Combined type
LF410/LF620
LF414/LF620F
Figure1. Configuration
Converter
Signal cable
Power
supply
I/O
Detector
Separate type
LF410/LF622
LF414/LF622F
1/2" to 4" (15 to 100 mm)
LF410/LF620
LF414/LF620F
Figure2. LF410 Mount-Anywhere series
Flowmeters
Specifications
Overall Specifications
Measurement range in terms of flow velocity:
1.0 ft/s to 32.8 ft/s (0.3 m/s to 10 m/s).
0.3 ft/s to 1.0 ft/s (0.1 m/s to 0.3 m/s)
range is available optionally.
± ± ± ± 0.2 % of Rate
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 1.64ft/s (0.5m/s) or more and ±0.3% of rate ±0.039
inch/s (1mm/s) at 1.64 ft/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 356 °F (–10 to +180°C):Separate type for
ceramic tube.
14 to 248°F (–10 to +120°C): Combine type for
ceramic tube
Ambient temperature: - 4 to 140 °F ( - 20 to + 60 °C)
LF410 /LF620
LF410 /LF622
LF410 LF622
LF414 LF622F
Certification number
Z01207
*
EJL-136F