Toshiba TIC-LF232A specifications Introduction, Overall Specifications

Field Intelligent Device Series	LF232
Electromagnetic Flowmeter Converter
Sanitary 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 4–20 mA dc current signal.

The LF232 offers various outputs such as totalization output and multi-range selection outputs. With it patented Noise-Sentryoriginal noise-suppression circuit and advanced algorithms. The LF232 is highly resistant to noise and provides a stable output even when measuring fluids contain slurries. The LF232 can be used with a separately mounted detector such as the LF150 or LF470. The LF232 can also be used with conventional models of detectors.

The AF900 hand-held terminal (HART*1 communicator) can be used to communicate with the flowmeter from a remote place. See the Communications signal specification for details about HART protocol.

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

Specifications

Overall Specifications

Measurement range in terms of flow velocity:

Conbination LF150, LF470

0 –1.0 ft/s to 0 – 32.8 ft/s (0 – 0.3 m/s to 0 –10 m/s)

Fluid conductivity: 5µS/cm or more

Ambient temperature: -4 to 140 °F (-20 to 60 °C) (Storage temperature: -13 to 149 °F (-25 to 65 °C)) Structure: IP67 and NEMA 4X Watertight

Figure 1. LF232 Converter

Accuracy: the accuracy is dependent on the type of detector combined with the LF232. See the following tables for accuracy when combined with specified detectors.

・Detector combined

LF470 (Meter size 1/10", 1/6”, 1/4" (2.5 to 6 mm))

Flow rate as a	Accuracy
percent of range	0.3–1.0m/s	1.0–10m/s
0～50％	±0.8％FS	±0.4％FS
50～100％	±0.8％FS	±0.8％ of rate

・Detector combined

LF150 (Meter size 28” to 120” (700 to 3000 mm))

Accuracy: ±0.5 % of Rate*

*This pulse output error result is established under standard operating conditions at Toshiba’s flow calibration facility, Fuchu Japan.

*Individual meter’s measurement error may vary up to ± 0.8 % of Rate at 3.28 ft/s (1.0 m/s) or more and

± 0.4% of Rate ±0.157 inch/s (4mm/s) at 3.28 ft/s (1.0 m/s) or less.

*Current output: plus ± 8µA (0.05% of span).

*Refer to individual calibration data for each individual meter’s measurement error.

TIC-LF232A