Draper 300 Series User Manual

IMPORTANT: Please read these instructions carefully to ensure the safe and effective use of this product and save
these instructions for future reference. This manual has been compiled by Draper Tools and is an integrated part of the
product with which it is enclosed and should be kept with it for future references.
This manual describes the purpose for which the product has been designed and contains all the necessary information
to ensure its correct and safe use. We recommend that this manual is read before any operation or, before performing
any kind of adjustment to the product and prior to any maintenance tasks. By following all the general safety
instructions contained in this manual, it will ensure both product and operator safety, together with longer life of the
product itself.
AlI photographs and drawings in this manual are supplied by Draper Tools to help illustrate the operation of the product.
Whilst every effort has been made to ensure accuracy of information contained in this manual, the Draper Tools policy
of continuous improvement determines the right to make modifications without prior warning.
300 SERIES
MULTIMETER
41822

Draper 300 Series Specifications

General

Diode Test	Yes
Continuity Test	Yes
Power Supply	9V Battery
DC Current	10A
Display	3.5 digit LCD

Summary

DRAPER 300 SERIES MULTIMETER

Important Safety and Usage Information

Key safety advice for initial use and manual reference.

Product Guarantee and Warranty

Draper Tools Limited Guarantee

Terms, conditions, and process for warranty claims and repairs.

General Product Specifications

AC/DC Electrical Specifications

Measurement Function Specifications

Advanced Measurement Functions

Automotive Measurement Functions

Engine Dwell and Tachometer

Specifications for measuring engine dwell angle and rotation speed (RPM).

Health and Safety Precautions

General Safety Guidelines

Essential safety instructions to avoid electrical shock and personal injury during use.

Specific Operational Safety

Safety rules regarding voltage limits, test leads, fuses, batteries, and measurement procedures.

LCD Display Symbols and Indicators

Interpreting Display Icons

Operating Instructions: Basic Modes

Relative Mode Operation

How to use the Relative mode for comparative measurements.

Manual and Auto Ranging

Data Hold and Trigger Selection

Operating Instructions: Voltage and Current

Measuring DC or AC Voltage

Step-by-step guide for measuring voltage, including terminal setup.

Measuring DC or AC Current

Procedure for measuring current, including fuse selection and circuit connection.

Operating Instructions: Resistance, Continuity, Frequency

Measuring Resistance

How to measure resistance, noting stabilization and open circuit indication.

Continuity Test Procedure

Measuring Frequency

Operating Instructions: Capacitance, Diode, Duty Cycle

Measuring Capacitance

Procedure for measuring capacitance using an adapter and relative mode.

Diode Test Function

How to perform a diode test and interpret results.

Measuring Duty Cycle

Operating Instructions: Temperature and RPM

Measuring Temperature

How to measure temperature using a K-type thermocouple, noting limitations.

Measuring RPM

Procedure for measuring engine RPM with an inductive pick-up.

Operating Instructions: Dwell Angle, Pulse Width, Power

Measuring Dwell Angle

Measuring Pulse Width

Explanation of Controls and Symbols

Symbol Reference Guide

Safety and Measurement Symbols