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Manuals
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Megger Manuals
Test Equipment
LTW335
User manual
Megger LTW335 User Manual
Ltw300 series, earth loop testers
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Contents
Table of Contents
Bookmarks
Table of Contents
Safety Warnings
Table of Contents
Introduction
General Introduction
Unpacking the Carton
LCD Display
Top Panels
Additional Controls on the LTW335
Keypad Controls
Range Knob Controls
Connection Panel
Lid Open/Closure
Preparations for Use
Preliminary Test Lead
Ingress Moisture
General Operating Instructions
Backlight Operation
Test Leads
Test Lead Connection
Loop Testing
Description of Test Methods
No-Trip Test (All Instruments)
Symbols Used During a Normal Loop Test
High Current Test (All Instruments)
High Resolution Test (LTW425 Only)
Performing a Loop Test
Non-Tripping Loop Test (no TRIP)
No-Trip Testing Using the Mains Socket Test Lead
Phase to Earth Loop Test
Phase to Neutral Loop Test
No-Trip Loop Testing Using the RED/GREEN Test Lead
Phase to Earth Loop Test
Phase to Neutral and Phase to Phase Loop Testing
Earth Bonded Metalwork Testing
High Current Loop Test
High Current Phase to Neutral Loop Test
High Current Phase to Phase Loop Test
High Resolution Loop Test (LTW425 Only)
Prospective Fault Current Display (PFC)
PFC Measurement
Possible Source of Error
Maxz (LTW325, LTW335 and LTW425)
Diriving R1 + R2 (LTW325, LTW335 and LTW425)
Measuring Zref
Voltage and Frequency Measurement
Phase to Earth and Phase to Neutral Voltage and Frequency Measurement
Phase to Phase Voltage and Frequency Measurement
Saving and Downloading Test Results (LTW335 Only)
Storing LOOP Test Results
To Store a Result
To Store Subsequent Result
To Recall Test Result
Downloading Results to a PC
Deleting Test Results
SETUP Menu
Setup Option Selection
Fused or Long Test Lead Length
Backlight Brightness Adjust
Warning and Status Messages
Loop Test Inhibit or Premature Termination of a Loop Test
Replacing Batteries and Fuses
Low Battery Warning Symbol
Procedure to Replace Batteries
Fuse Blown Indicator
Auto Power down
Preventative Maintenance
Technical Specification
Accessories
Repair and Warranty
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Description of Test Methods
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Loop Testing
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LTW300 Series
Earth Loop testers
User Guide
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