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Manuals
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Toshiba Manuals
Plumbing Product
LF494
Instruction manual
Toshiba LF494 Instruction Manual
Electromagnetic flowmeter
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Also See for LF494
:
User manual
(17 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Safety Precautions
Safety Precautions for Installation and Wiring
Safety Precautions for Maintenance and Inspection
Handling Precautions
Contents
Product Inspection and Storage
Product Features
Names of Parts
Outline Drawing
Terminal Board of LF404 Converter
Control Switch or Keys of LF404 Converter
Safety Precautions for Installation
Location
Mounting Procedure
Pipe Checks
Pipe Leaning
Installation Procedure
LF494/LF404 Flowmeter Piping Connections
Piping Connections
Required Straight Pipe Length on the Upstream Side
Pipe Orientation
Detector Piping Orientation
Installation Position of the Detector
Flow Direction
Preventing an Empty Arrow on the Detector
Detector with an Upright Pipe Run at Downstream Outlet
Detector with Sufficient Head Pressure at Downstream Outlet
Supporting Pipe
Example of Pipe Fixing Procedure
Model Diagram of Unsupported Pipes
Grounding
Wiring
Cables
External Device Connections and Grounding
Terminal Block Connections
Digital I/O Connections
Electromagnetic Counter Connection Example
Wiring Procedure
Cable Termination
Cable Connections
Terminal Board Connections
Operation
Preparatory Check
Zero Adjustment
LCD Display and Controls
LF404 Converter with LCD Display
Control Keys
Display Format
Basic Operations
Mode Change
Change Mode Flow
Configuration Parameter Selection in Setting and Calibration Modes
To Select the Desired Item
To Change the Setting Value
To Return the Measurement Value
Converter for Special Specifications
Configuration Items Selection Table
Password Input
Configuration Parameter Setting
Configuration Items
Checking or Changing Parameters
Excitation Current
To Change the Excitation Current Setting Value
Meter Size
To Change the Meter Size
Excitation Frequency
To Change the Excitation Frequency
Indicating Unit
To Check the Indicating Units
To Change the Indicating Units
Span
Range Type
Unit of Span
Hysteresis
To Check each Constant
To Change the Range Type
To Change the Span (Range)
To Change the Hysteresis
Damping Constant
To Change the Damping Constant
Low Cutoff
To Change the Low Cutoff Value
Digital I/O
Digital Output Functions
Digital Input Function
Digital Output Active Status
Digital Input Detective Level
To Check the Digital I/O Functions
To Change the Digital I/O Functions
Counting Rate (Pulse Rate)
To Check the Counting Rate and Pulse Width
To Change the Counting Rate
Preset Count Value
To Change Preset Count Value
High and Low Limit Alarms
To Check the High and Low Limit Values
To Change the High/Low Limit Alarm Status and Its Alarm Limit Value
To Change the High/Low Limit Value
Empty Pipe Alarm
To Check the Empty Pipe Alarm Enable/Disable Status
To Change the Empty Pipe Alarm Enable/Disable Status
Rate-Of-Change Limit
To Check the Rate-Of-Change Limit Value and the Control Limit Time
To Change the Rate-Of-Change Limit Value
Fixed-Value Output
To Check the Enable/Disable Status of the Fixed-Valve Output and Its Output Values
To Change the Enable/Disable Status of the Fixed-Valve Output and Its Output Values
To Change the Fixed Pulse Output Value
Zero Offset Adjustment
To Check/Change the Zero Offset Value
Password
In Case of Forgetting Password
4-20Ma Alarm Output
To Change the 4-20Ma Alarm Output Functions
DI Detective Level
To Check the DI Detective Level
To Change the DI Detective Level
Preset Function
Preset Point Output Functions
To Check the Preset Functions
To Change the Preset Functions
Calibration Items
Calibration Using Converter Signal Source
0% Flow Rate Calibration
To Check/Change the Zero Point of Flow Measurement
50% Flow Rate Calibration
100% Flow Rate (Span) Calibration
Checking the Excitation Current Valve
Digital I/O Functions
Digital I/O Specifications
Totalizer and Pulse Output
Totalizer Operation
Using Control Keys on the Panel
Using the Optional DI Signal
Multi-Range Functions
Output Performance of Multi-Range Functions
Automatic Selection of Unidirectional Flow Multi-Range
Automatic Selection of Bidirectional Flow Multi-Range
Remote Selection of Unidirectional Flow with an External Signal
Remote Selection of Bidirectional Flows Multi-Range with an External Signal
High and Low Limit Alarm Output Performance
Signal Range Performance, Multi Range Performance
Output Conditions When an Empty Pipe Alarm Occurs
Preset Point Output
Preset Point Output Performance
Start Signal Requirements
Remote Selection of Fixed Value Output
Converter Failure Alarm
Communications Function
Connections with the AF100 Terminal
Connections to the Current Output Line
Communications Procedure
Cautionary Notes on Communications
Filter Connection Example
Self-Diagnostics and Alarms
Converter Hardware Failure
Output Status for Errors and Alarms
Maintenance and Troubleshooting
Safety Precaution for Maintenance and Troubleshooting
Maintenance: Calibration
Maintenance: Fuse
Maintenance: LCD Display
Maintenance: Power Supply Unit
Cleaning the Pipe Wall Inside of Detector
Maintenance Parts
Operative Life
Flow Rate Is Not Indicated
Flow Rate Is Not Correct
Flow Rate Indication Is Not Stable
Principle of Operation
Specifications
Type Specification Code
Type Specification Code Maintenance Parts
Outline Dimensions
Electromagnetic Compatibility and Low Voltage Safety
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