Toshiba LF494 - Manual (Page 11)

TOSHIBA
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2, Overview
The LP494/LF404 ciectromagiiclic flowmeter can be use in the following hai;ardous (clas­
sified) locations,
( 1 ) FM Approval
Class I , Division 2» Groups B, C and D,
Class n , Division
2 ,
Groups K and G
Class IIE
(2) CSA Certification
Gass I , Division
2 ,
Groups B, C and D,
Class U, Division 2, Groups E, F and G
Class in
The device measures the volumetric flow rates of electrically conductive materiaU on
the basis of Faraday's J.aw of electromagnetic induction.
The device consists of two unit.s; the detector» through which the fluid to be measured
flows, and the converter, which receives the electromorive force signals from the
delector, then converts the signals into the 4—20 mA dc signal.
Model LF494/LF404 is a sanitary elcctromagneiic flowmeter designed for applications
handling food and beverages. Sani'.ary flowmeters must be sinictured in such a way dial
operation and handling is simple, easy and thorough for the purpose of sanitary control
such as cleaning, sterilizing and drying, llic flow-meter has no obstacles in the flow
stream and it is designed to provide indispensable conditions for sanitary control and is
fit for flowrate measurcjncnt for food and beverages.
Features
Model LF494/LF404 sanitary flowmeter has Ihe following features:
(J) Fluid flow is not obstructed and pressure loss is negligible.
Toshiba's original noisc-suppression circuit with signal processing capabilities ensures ( 2 )
(3)
(4)
(5)
(fi)
(7)
(S)
(У)
a stable oulpul.
Has no moving parts and flow indication is quick with high accuracy even under low'
flowrate measurement conditions.
Equipped with a ferrule, compatible with ISO clamp connection, at both ends of the
detector. They can be mounted or dismounted easily and securely.
No obstacles in the flow stream and nowhere remains the fluid along the detector pipe.
Thus deterioration or corrosion of fluid does not <xxmr.
High accuracy, ±0,5% of rale is possible for 0.3-10 m's velocity range.
0
, 1
lo 0.3 m^s range is available oplionaljy.
The flowmeter has various flow measurement output and control functions as standard
specifications and the optional LCD display for convenient parameter settings.
• 'I’hcse functions can be selected with control keys on the panel.
Intelligent functions
* The widely used HART protocol comm uri real ions system is used as a standard
feature, HART (Highw'ay Addressable Remote Transducer) is a communications
protocol for industrial sensors recommended by HCF (HART Communication
Foundaiion).
.An easy-io-rcad LCD display (2-line x 16-character display) (optional)
• The backlit LCD display can be read even under poor lighting conditions.
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