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Polar Instruments TONEOHM 850A - User Manual

Polar Instruments TONEOHM 850A
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Question and Answer IconNeed help?

Do you have a question about the Polar Instruments TONEOHM 850A and is the answer not in the manual?

Summary

POLAR INSTRUMENTS LTD. HARDWARE WARRANTY

Product Warranty

Product hardware warranted free from defects in material & workmanship during the Warranty Period.

Warranty Claims

Polar not liable if end user fails to provide timely notice of alleged defects.

Damage in Transit

End user must notify Polar & carrier of transit damage within 2 days of receipt.

Polars Liability

Polar's liability & end user's remedy limited to express remedies in this warranty.

Disclaimer of Warranties

POLAR MAKES NO OTHER WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, REGARDING PRODUCTS.

Limitation of Liability

POLAR NOT RESPONSIBLE FOR DIRECT DAMAGES EXCEEDING PURCHASE PRICE PAID BY END USER.

DECLARATIONS

European Community Directive Conformance Statement

Product conforms to applicable EC Council Directives on electromagnetic compatibility and voltage limits.

SAFETY

General Warning

Unit contains no user-serviceable parts. Opening covers may expose dangerous voltages.

Grounding Requirements

Instrument must be earthed and connected to an outlet with an effective protective conductor terminal.

Power Cord Color Codes

Details standard color coding for power cords in Europe and the United States.

INTRODUCTION

Introduction to the TONEOHM 850 A

An overview of the Polar TONEOHM 850A shorts locator and its applications.

Using the TONEOHM 850 A to Locate Short Circuits

Explains three operating modes: Milliohmmeter, Track Voltage, and Current Trace for fault finding.

TONEOHM 850 A Applications

Details various applications requiring low resistance measurements.

TONEOHM 850 A Display Mechanisms

Describes the digital display and audio tone output features.

DESCRIPTION

TONEOHM 850 A Shorts Locating Modes

Details three modes: Milliohmmeter, Track Voltage, and Current Tracer for fault finding.

Controls, Connectors, and Probes

Describes the front panel controls, connectors, and probes for operation.

Rear Panel Controls and Connectors

Details the ON/OFF switch and IEC mains inlet connector on the rear panel.

Mode and Range Selection

Provides guidelines for selecting appropriate modes and ranges based on fault type.

INSTALLATION AND SET-UP

Preparation for Use

Covers unpacking the instrument and its accessories.

Connecting the TONEOHM 850 A to a Power Supply

Instructions for connecting the instrument to a suitable mains power supply.

MILLIOHMMETER

Locating Solder and Land Bridges

Techniques for identifying low resistance shorts using the milliohmmeter range.

Tracing Faults on Double Sided Boards

Applies milliohmmeter techniques to double-sided boards, noting challenges on dense boards.

Example: Low Resistance Short

Illustrates finding a short circuit using the milliohmmeter by tracking readings and tone.

TRACK VOLTAGE

Using Track Voltage to Locate Loading Faults

Explains tracing current via voltage drops for loading faults and high resistance shorts.

Static Faults

Describes using the Drive Source for static faults and specific ranges for PCB tracks.

Excessive Vcc Loads

Details identifying faults where a Vcc rail is held low by excessive current draw.

Dynamic Faults

Covers testing powered-up boards to trace current flow and identify faults causing excess current.

CURRENT TRACING

Non-Contact Current Tracing

Useful for tracks/components difficult to access, like dense PCBs, cable looms, or inner layers.

Using the 850 A Drive Source

Explains using the Drive Source to inject current & probe to detect magnetic field.

Connection and Sensitivity Adjustment

Guides on connecting leads, adjusting Drive Source control, and optimizing probe sensitivity.

Operation

Describes tracing current paths, board sectoring, and finding faults within a small area.

Bus Faults (Stuck Nodes)

Locating faults on bus lines where parallel capacitors are absent.

Edge Connectors

Detecting shorts between pins of edge connectors using Drive Source and probe.

Faulty Decoupling Capacitors

Using TRACE to identify open circuit decoupling capacitors by sensing current flow.

SIMPLE MAINTENANCE AND CLEANING

Cleaning

Instructions for cleaning the instrument using water, mild detergent, or alcohol.

Technical Support

Information on contacting Polar Instruments or distributors for technical assistance.

Summary

POLAR INSTRUMENTS LTD. HARDWARE WARRANTY

Product Warranty

Product hardware warranted free from defects in material & workmanship during the Warranty Period.

Warranty Claims

Polar not liable if end user fails to provide timely notice of alleged defects.

Damage in Transit

End user must notify Polar & carrier of transit damage within 2 days of receipt.

Polars Liability

Polar's liability & end user's remedy limited to express remedies in this warranty.

Disclaimer of Warranties

POLAR MAKES NO OTHER WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, REGARDING PRODUCTS.

Limitation of Liability

POLAR NOT RESPONSIBLE FOR DIRECT DAMAGES EXCEEDING PURCHASE PRICE PAID BY END USER.

DECLARATIONS

European Community Directive Conformance Statement

Product conforms to applicable EC Council Directives on electromagnetic compatibility and voltage limits.

SAFETY

General Warning

Unit contains no user-serviceable parts. Opening covers may expose dangerous voltages.

Grounding Requirements

Instrument must be earthed and connected to an outlet with an effective protective conductor terminal.

Power Cord Color Codes

Details standard color coding for power cords in Europe and the United States.

INTRODUCTION

Introduction to the TONEOHM 850 A

An overview of the Polar TONEOHM 850A shorts locator and its applications.

Using the TONEOHM 850 A to Locate Short Circuits

Explains three operating modes: Milliohmmeter, Track Voltage, and Current Trace for fault finding.

TONEOHM 850 A Applications

Details various applications requiring low resistance measurements.

TONEOHM 850 A Display Mechanisms

Describes the digital display and audio tone output features.

DESCRIPTION

TONEOHM 850 A Shorts Locating Modes

Details three modes: Milliohmmeter, Track Voltage, and Current Tracer for fault finding.

Controls, Connectors, and Probes

Describes the front panel controls, connectors, and probes for operation.

Rear Panel Controls and Connectors

Details the ON/OFF switch and IEC mains inlet connector on the rear panel.

Mode and Range Selection

Provides guidelines for selecting appropriate modes and ranges based on fault type.

INSTALLATION AND SET-UP

Preparation for Use

Covers unpacking the instrument and its accessories.

Connecting the TONEOHM 850 A to a Power Supply

Instructions for connecting the instrument to a suitable mains power supply.

MILLIOHMMETER

Locating Solder and Land Bridges

Techniques for identifying low resistance shorts using the milliohmmeter range.

Tracing Faults on Double Sided Boards

Applies milliohmmeter techniques to double-sided boards, noting challenges on dense boards.

Example: Low Resistance Short

Illustrates finding a short circuit using the milliohmmeter by tracking readings and tone.

TRACK VOLTAGE

Using Track Voltage to Locate Loading Faults

Explains tracing current via voltage drops for loading faults and high resistance shorts.

Static Faults

Describes using the Drive Source for static faults and specific ranges for PCB tracks.

Excessive Vcc Loads

Details identifying faults where a Vcc rail is held low by excessive current draw.

Dynamic Faults

Covers testing powered-up boards to trace current flow and identify faults causing excess current.

CURRENT TRACING

Non-Contact Current Tracing

Useful for tracks/components difficult to access, like dense PCBs, cable looms, or inner layers.

Using the 850 A Drive Source

Explains using the Drive Source to inject current & probe to detect magnetic field.

Connection and Sensitivity Adjustment

Guides on connecting leads, adjusting Drive Source control, and optimizing probe sensitivity.

Operation

Describes tracing current paths, board sectoring, and finding faults within a small area.

Bus Faults (Stuck Nodes)

Locating faults on bus lines where parallel capacitors are absent.

Edge Connectors

Detecting shorts between pins of edge connectors using Drive Source and probe.

Faulty Decoupling Capacitors

Using TRACE to identify open circuit decoupling capacitors by sensing current flow.

SIMPLE MAINTENANCE AND CLEANING

Cleaning

Instructions for cleaning the instrument using water, mild detergent, or alcohol.

Technical Support

Information on contacting Polar Instruments or distributors for technical assistance.

Polar Instruments TONEOHM 850A Specifications

General IconGeneral
Power Supply100-240 VAC, 50/60 Hz
Accuracy0.02%
InterfacesRS-232, USB
Test CurrentUp to 1A
DisplayLCD