Kyoritsu KEW1021R Digital Multimeter

Introduction and Safety

This document serves as the instruction manual for the Kyoritsu KEW1021R Digital Multimeter. It provides essential information for safe and effective operation, including critical safety warnings, detailed specifications, and guidance on various measurement functions. Users are strongly advised to read and understand all instructions before operating the instrument to prevent injury or damage.

Key safety considerations include adhering to measurement categories (CAT II, CAT III, CAT IV), avoiding hazardous environments, and using appropriate protective gear. The manual outlines DANGER, WARNING, and CAUTION levels to highlight potential risks.

Specifications Overview

The KEW1021R offers a wide range of measurement capabilities, including AC/DC Voltage (ACV/DCV), AC/DC Current (ACA/DCA) via direct input or clamp sensors, Resistance, Continuity, Diode testing, and Capacitance. Detailed specifications for accuracy, input impedance, frequency response, and measurement ranges are provided for each function. The instrument complies with international standards such as IEC 61010 and IEC 61326 (EMC).

Operational Functions

The multimeter features several useful functions to enhance measurement efficiency:

• REL (Relative Value): Stores a reference value to display differences from subsequent measurements.
• MAX/MIN: Records and displays the maximum and minimum measured values during a session.
• Data Hold: Freezes the current reading on the LCD display.
• Backlight: Illuminates the LCD for better visibility in low-light conditions.
• Sleep Function: Automatically powers off the device after a period of inactivity to conserve battery life.

Measurement Procedures

The manual details the steps for performing various measurements:

• ACV/DCV/ACmV/DCmV: Instructions for voltage and millivoltage measurements, including frequency and duty cycle readings.
• Clamp Sensor Measurements: Guidance on using optional AC/DC clamp sensors for current measurements.
• Resistance, Continuity, Diode, Capacitance: Procedures for measuring resistance, checking continuity, testing diodes, and measuring capacitance.
• ACA/DCA: Instructions for measuring AC and DC current, including safety precautions for high currents and fuse protection.

Maintenance and Battery/Fuse Replacement

Proper maintenance ensures the longevity and accuracy of the KEW1021R. The manual provides clear instructions on how to replace the batteries (R03/AAA x 2) and the internal fuse (10A/600V). It emphasizes safety precautions, such as powering off the device and disconnecting test leads before replacement, and using only designated replacement parts.