Toshiba LF470/LF612 specifications Introduction, Specifications, Field Intelligent Device Series

Field Intelligent Device Series	LF470/LF612
Electromagnetic Flowmeter	1/10",1/6”,1/4" (2.5,4,6mm )

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 4–20 mA dc current signal. The LF470 is a small meter size detector designed to measure a small amount of fluids containing substances such as chemicals.

The wetted materials for the LF470 are corrosion resistant ceramic and platinum electrods and are applicable to almost any kind of fluids. The LF470 is a lightweight palm-sized detector.Combined with multi-functional converter LF612 (separate type) and LF232*1 (separate type) equipped with its patented Noise-Sentryoriginal noise-suppression circuit and advanced algorithms. The LF470 is highly resistant to noise and provides a stable output even for fluids containing slurries. 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 be rotated to 90, 180 and 270 degrees without opening the cover

The AF900 hand-held terminal (HART*2 communicator) can be used to communicate with the flowmeter from a remote place. PROFIBUS-PA*3interface is available as an option.

*1: Please refer to the document ”TIC-LF232”.

*2: HART protocol (Highway Addressable Remote Transducer) is a communication protocol for industrial sensors recommended by the HCF (HARTCommunication Foundation).

*3: 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.

Fluid to be measured

Signal cable		Power supply
Excitation cable
	4-20mA dc output
	and pulse output

LF470

DetectorLF612 or LF232

Converter

Figure 1. Configuration Diagram

LF470	LF612
Figure 2.	Electromagnetic Flowmeter
	LF470/LF612

Certification number

Z01207

Specifications

Overall Specifications

Measurement range in terms of flow velocity: 0–1.0ft/s to 0–32.8ft/s(0–0.3 m/s to 0–10 m/s )

Accuracy: The overall accuracy combined with the LF612 or LF232 converter is shown in the following table.

Flow rate as a	Accuracy
percent of range	1.0-3.3ft/s	3.3-32.8ft/s
	(0.3-1.0m/s )	(1.0-10m/s )
50～100％	±0.8% of FS	±0.8% of rate
0～50％	±0.8% of FS	±0.4% of FS

Note: The accuracy is measured under standard operating conditions at Toshiba's calibration facility.

Fluid conductivity: 50µS/cm minimum

Fluid temperature:

Pipe connection material	Fluid temperature
Stainless steel and other metals	14 to 248 °F
	(－10℃～＋120℃)
Polyvinyl chloride	14 to 140 °F
(shock-resistant)	(－10℃～＋60℃)

Ambient temperature: 14 to 140 °F (–10 to +60 °C )

Structure: IP67

Power consumption:

・When combined with the LF612 converter: approximately 12W (20VA)

・When combined with the LF232 converter: approximately 14W (25VA)

TIC-LF470B