Toshiba LF600F - Manual (Page 13)

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2. Overview
The LF600F and LF602F electromagnetic flowmeter converter can be use in the following
hazardous (classified) locations.
Class I, Division 2, Groups A, B, C and D,
Class n, Division 2, Groups E, F and G
Classin
This product is a converter used for electric flowmeters that measure the volumetric flow rate of
conductive fluid using Faraday's law of electromagnetic induction.
You can bring out the functions of the converter when you place it in the converter housing you
prepare and use it in combination with a fluid rate measurement detector.
The converter sends out a signal to drive the detector exciting coil, which generates a magnetic
field inside the detector. The converter receives the signal electromotive force obtained by the
detector, as signal electromotive force in proportion to the generated flow rate in the fluid using
Faraday's law of electromagnetic induction. After carrying out operation, the converter converts
the signal electromotive force to an analog signal instrumentation unified signal output and
displays the status, as a flow rate value.
Features
With a linear relationship between the flow rate and output signal, the electromagnetic flowmeter
is featured as an easy-to-read indicator. In addition to this feature, it has the following outstanding
features:
(1) Wide flow velocity range setting, such as a flow velocity range of 0-0.1 and 0~10m/s, is
achieved.
(2) The unique noise filter-out circuit and arithmetic operation processor enables you to obtain
stable output.
(3) Full graphic LCD that enables display of a large amount of information
• With a large amount of a maximum of 14 characters x 8 lines, you can easily check various
displays including bar graphs and alarm indications.
• The backlight allows you to read the indicator easily.
(4) Use of infrared switches
• Use of infrared switches allows you to perform various operations, without opening the
converter housing cover.
(5) Intelligent functions
• The widely used HART protocol communications system is used as a standard feature.
• This product supports PROFIBUS*^ communication by option.
* 1 HART protocol: “HART” stands for Highway Addressable Remote Transducer and is a
communication protocol recommended by HCF (HART communication
Foundation) for industrial sensors.
* 2 PROFIBUS: PROFIBUS, which stands for PROCESS FIELDBUS, is a kind of field bus
that is approved by international standard IEC61158. The electromagnetic
flowmeter supports PRFIBUS PA for process automation.
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