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Polar Instruments TONEOHM 950 User Manual

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Polar Instruments Ltd.
Garenne Park
Rue de la Cache
St. Sampson
Guernsey
Channel Islands
GY2 4AF
England
http://www.polarinstruments.com
Fax: +44 (0)1481 252476
Email: mail@polarinstruments.com
MAN 129–9803
TONEOHM 950
OPERATOR
MANUAL
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Table of Contents

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Polar Instruments TONEOHM 950 Specifications

General IconGeneral
Test Frequency1 kHz
Accuracy0.1% basic accuracy
Display4.3 inch TFT LCD with backlight
Power100 V to 240 V AC, 50 Hz to 60 Hz
Power Supply100 V to 240 V AC, 50 Hz to 60 Hz

Summary

Polar Instruments Ltd. Hardware Warranty

Product Warranty

Specifies warranty coverage for product hardware against defects in material and workmanship.

Warranty Claims

Outlines the procedure and requirements for submitting a warranty claim for defects.

Damage in Transit

Details the notification process for claims regarding merchandise damaged during transit.

Polar's Liability

Defines the extent of Polar's liability and the exclusive remedies available to the end user.

Disclaimer of Warranties

States that Polar makes no other warranties, express, implied, or statutory, regarding products.

Limitation of Liability

Limits Polar's responsibility for damages, excluding special, consequential, or incidental damages.

Declarations

European Community Directive Conformance Statement

Statement of conformity with applicable EC Council Directives, including EMC and low voltage directives.

Safety

Warning

Alerts users to the presence of fused live and neutral lines and dangerous voltages when covers are removed.

Grounding

Emphasizes the necessity of earthing the instrument for operator safety and proper function.

Power Supply

Toneohm 950 Operation

Electrical Isolation

Caution regarding electrical isolation, advising disconnection from mains supply when using specific ranges.

Specifications

Track Resistance

Details the ranges, accuracy, and probe characteristics for resistance measurements.

Track Current

Specifies ranges, accuracy, and probe requirements for measuring current in tracks.

Track Voltage

Defines ranges, accuracy, and input resistance for voltage measurements.

Plane Shorts

Describes indication methods and sensitivity for locating shorts between tracks and planes.

Plane Stimulus

Lists output voltage, output current, and protection details for plane stimulus.

Drive Source

Details output characteristics and protection for the drive source.

Environmental Operating Conditions

Power Requirements

Specifies the voltage and frequency requirements for the instrument's power supply.

Physical Characteristics

Provides dimensions, weight, and flammability rating of the instrument.

Symbols

Accessories

Standard Accessories

Lists standard accessories included with the TONEOHM 950, such as probes and headphones.

Optional Accessories

Lists optional accessories available for purchase, including various stimulus lead sets.

Section 1 Introduction

Introduction

Provides an overview of short circuits and loading problems in electronics manufacturing and service.

TONEOHM 950 Operating Modes

Introduces the five operating modes of the TONEOHM 950 for locating short circuits.

Section 4 Operation

Locating Faults with the TONEOHM 950

Explains different techniques and approaches for locating faults using the instrument.

Range Selection

Guides the user on selecting the appropriate range based on the type of fault being diagnosed.

Low Resistance Shorts

Details the method for locating shorts with resistance under 200 mΩ using resistance measurements.

Plane Shorts

Describes how to locate shorts between tracks and planes on multi-layer boards.

Track Current Measurement

Explains how to measure current in a track without breaking the circuit for fault diagnosis.

Current Tracing (Non-Contact)

Covers non-contact current tracing for detecting current flow in difficult-to-access tracks.

Track Voltage Measurement

Details using voltage drop measurements to trace DC current flow in PCB tracks.

Section 2 Installation and Set Up

Preparation for Use

Covers initial steps before operating the instrument, including unpacking and connecting.

Unpacking

Instructions for carefully opening the transit pack and removing the instrument and accessories.

Connecting the TONEOHM 950 to a Power Supply

Guides on connecting the instrument to the mains power supply, checking voltage ratings.

Self Test

Describes the automatic self-test sequence performed when the instrument is switched on.

Section 3 Description

Connectors and Probes

Details the various connectors on the front panel and the different sets of probes provided.

Indicators

Explains the function of the LCD display, direction arrows, and various status LEDs.

Controls

Describes the operation of the Volume and Drive Source controls for adjusting output and sensitivity.

Ranges

Details the available measurement ranges for Track Resistance and Track Current measurements.

Section 5 Maintenance and Cleaning

Calibration Requirements

Recommends performing the calibration/adjustment procedure at least every 12 months.

Plane Stimulus Protection Fuses

Informs about internal fuses protecting the Plane Stimulus outputs from damage.

Cleaning

Provides instructions on how to clean the instrument using a damp cloth and mild detergent or alcohol.

Technical Support

Advises contacting local distributors or Polar Instruments for technical support.

Section 6 Application Note

Question About Plane Shorts

Addresses common questions regarding locating and repairing shorts using the Plane Shorts range.

Hard Short Definition

Defines a 'hard short' as a resistance under 200mΩ, typically caused by bridges or bent leads.

High Resistance Shorts

Discusses locating shorts with high resistance (>30Ω) and improving resolution by adjusting stimulus leads.

Multiple Shorts Troubleshooting

Explains how to identify and locate multiple shorts when direction arrows are inconclusive.