Toshiba TIC-LF494B Manual De Usuario

TIC-LF494B 

Sanitary electromagnetic flowmeters LF490 series are 

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 (CIP/SIP), 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. Therefore, 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 4–20mAdc current signal or 

communication signal. With the unique patented 

Mount-Anywhere magnetic field distribution 

technology, the meter is highly immune to upstream 

flow disturbances. Combined with a multi-functional 

converter LF610 (combined type) or LF612 (separate 

type) equipped with its patented Noise-Sentry original 

noise-suppression circuit and advanced algorithms. 

The LF490 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. 

 
 
 
 
 
 

 
 

  

 

 

 

 

 

 

 

 

 

 

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 an 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 factory 

and process automation that the PROFIBUS 

Organization recommends. Instead of analog control 

with a conventional analog signal (4-20mA), it is the 

fieldbus which digitizes all signals. Flowmeters support 

PROFIBUS-PA. 

 

 

 
 
 
 
 
 

 

 

 

 

 

 

 

 

  

   

Certification 

number

 

Z01207

 

 

   

Power supply 

Converter 

I/O 

Detector 

 

Power  
supply 

I/O

Detector 

Terminal box 

Signal cable 

Excitation cable

Converter 

LF490/LF610 
LF494/LF610F 

LF490/LF612 
LF494/LF612F