Toshiba LF494 User Manual
Specifications and Main Features
- Model: LF494 / LF404
- Kind: Electromagnetic Flowmeter
- Method of Measurement: It determined volumetric flow rates of electrically conductive materials on the basis of the Farady's principle of electromagnetic induction.
- Usage: Intended for sanitary service in food and beverage industry.
- Flow Measurement Output: 4-20 mA DC output signal.
- Accuracy: ±0.5% of rate of 0.3-10 m/s of velocity range.
- Supporting accuracy range: from 0.1 m/s to 0.3 m/s depending on the condition.
- Weight: 2-line x 16 characters LCD (optional).
- Communication Protocol: HART communications system integrated as standard.
- Pressure Loss: None hence no moving parts are employed.
- Installation: Each end of the detector has an ISO clamp connection to facilitate easy installation and disassembly.
- Environmental Ratings:
- FM Approval Classes: Class I Division 2 Groups A B C and D; Class I Division 2 Group F and G.
- CSA Certification: Class I Division 2 Groups A B C and D; Class I Division 2 Groups E F and G.
- Material Compatibility: Wetting materials should be chosen according to work fluid.
- Maintenance Features: Intelligent functions, such as self-diagnostics and alarms.
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Frequently Asked Questions
Q1: What is the LF494/LF404 flow mtaer intended for?
A1: The LF494/LF404 flowmeter senses the volume flow rates of liquid materials in motion such as metals, by means of electrical induction principle.
Q2: Can this flowmeter be used in hazardous locations?
A2: Yes, the flowmeter can be used in Class I, Division 2 areas as approved by FM and CSA.
Q3: What type of connections does the LF494/LF404 support?
A3: There are ISO clamp connections on both sides of the detector.
Q4: What is the range of accuracy LF494/LF404 flowmeter?
A4: The equipment is guaranteed to be accurate to within ±0.5% of the rate in the velocity range of between 0.3 m/s to 10m/s.
Q5: What about LCD display for LF494/LF404?
A5: There is an optional backlit LCD display which is fitted with these instruments for those people working in poorly lit conditions.
Q6: What kind of communication does the flow meter use?
A6: The LF494/LF404 flowmeter necessitates the use of HART communication by default.
Q7: What is required to be done to make sure the flow meter works correctly?
A7: Follow guidelines on how to install, wire and the working environment as specified in the user manual. Periodic maintenance check-ups are also important.
Q8: Are there any specific precautions for installation?
A8: Yes, avoid locations with explosive atmospheres, direct sunlight, and excessive vibrations. Follow all safety precautions during installation and wiring.
User Manual
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