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Actron 612 User Manual

Actron 612
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Actron 612 Specifications

General IconGeneral
BrandActron
Model612
CategoryMeasuring Instruments
LanguageEnglish

Summary

Dwell-Tachometer Model 612 Operation and Safety

Safe Operation Guidelines

Adhere to safety measures, avoiding moving parts, hot surfaces, and ensuring proper ventilation.

Important Usage Notes

Refer to vehicle manuals for specific tune-up procedures and manufacturer specifications.

Tachometer Connections for RPM and Dwell Tests

General Connection Procedure

Connect BLACK clip to battery negative/ground, GREEN clip to distributor/TACH terminal.

GM Cars with Diagnostic Connector

Use adapter in socket No.6, connect GREEN clip to spade terminal, BLACK to battery NEG.

Delco High Energy Ignition (HEI)

Connect GREEN clip to TACH terminal or adapter for HEI systems; BLACK to battery NEG.

Connections for Ford & Chrysler Ignition Systems

Ford Transistor Ignition

Connect GREEN clip to 'DEC'/'TACH' wire or use Ford adapter; BLACK clip to battery NEG.

Chrysler & American Motors Ignition

Connect GREEN lead to ignition coil negative terminal; BLACK clip to battery NEG.

Ford Conventional Ignition

Lift distributor terminal, slide Ford adapter, connect GREEN clip; BLACK clip to battery NEG.

Idling Speed, RPM, and Carburetor Adjustment

General Adjustment Notes

Adjust carburetor per manufacturer's manual; warm engine before adjustments.

RPM Measurement and Adjustment

Slide selector to RPM; double 8-cyl scale reading for 4-cyl engines.

Idle Speed & Mixture Adjustment

Consult manual for idle speed/mixture screw locations and procedures; refer to engine decal.

Dwell Test and Adjustment Procedures

Dwell Measurement Procedure

Slide selector to DWELL; observe readings; compare to manufacturer's specifications.

Conventional Breaker Point Systems

Adjust dwell using Allen wrench on GM distributors or follow steps for other systems.

Electronic and Transistor Ignitions

Dwell is not adjustable; check reading against manufacturer limits for diagnostic purposes.

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