Radio Shack 24 Range Digital Multimeter 22-805 Manual May 2026

Here is the practical guide, replicating the most important pages of the original manual.

Summary

Build & Design

Measurement & Performance

Battery & Power

Usability

Pros

Cons

Who it’s for

Quick verdict

Suggested alternatives (if you want better accuracy/safety)

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RadioShack 24-Range LCD Digital Multimeter (Cat. No. 22-805)

is a portable diagnostic tool designed for home, lab, and shop use. Its manual highlights professional-grade features, including a built-in computer interface for data logging and an analog bargraph for quick visual reference. Internet Archive Key Specifications & Features Measurement Ranges

: Capable of measuring 24 distinct ranges, including DC voltage up to , AC voltage up to , and resistance up to Digital Display : Features a -digit LCD that can display up to 3,999 units Computer Interface : One of the meter's standout legacy features is its RS-232 serial connectivity

, which allowed users to log and graph measurements in real-time using MS-DOS or Windows 3.1/95/98 software. Data Functions : Includes a function to freeze readings on the screen and an Analog Bargraph

to show the magnitude of input relative to the full-scale range. Internet Archive Essential Safety & Use Instructions radio shack 24 range digital multimeter 22-805 manual

The owner's manual emphasizes several critical safety protocols to prevent injury or equipment damage: Internet Archive Measurement Limits : Never attempt to measure more than to avoid electric shock and permanent damage to the meter. Circuit Protection

: Always discharge capacitors in a circuit before attaching test leads for resistance or diode testing. Battery Maintenance : The meter typically uses a 9V battery

. If you do not plan to use the device for more than a week, the manual recommends removing the battery to prevent chemical leaks. Internal Access

: To replace a blown fuse or the battery, you must remove the screws on the back cover. The 200mA range is fuse-protected, but note that the high-current 10A/20A terminal is often not fused. Manual Availability

While physical copies are no longer distributed by RadioShack, digital versions are preserved by community archives: Internet Archive

: Provides the full text of the 22-805 owner's manual for public viewing. Sigrok Wiki

: Offers technical details for modern users looking to utilize the RS-232 interface with open-source software. setting up the PC interface for data logging? AI responses may include mistakes. Learn more

Full text of "radio shack meters support 64777" - Internet Archive Here is the practical guide, replicating the most

Feature: Auto-Ranging with True RMS Measurement

Description: The RadioShack 24 Range Digital Multimeter 22-805 is an advanced multimeter that features auto-ranging capabilities and True RMS (Root Mean Square) measurement. This feature allows users to easily measure a wide range of electrical parameters, including AC/DC voltage, current, resistance, and more.

Benefits:

  • Large LCD Display: The multimeter features a large, easy-to-read LCD display that shows measurements in a clear and concise format.

    • Technical Specifications:

  • Accuracy:

    • Potential Applications:

    Overall, the RadioShack 24 Range Digital Multimeter 22-805 is a versatile and accurate tool that can be used in a variety of applications, from basic troubleshooting to advanced electronics work. Its auto-ranging and True RMS measurement features make it an ideal choice for professionals and DIYers alike.

    You might wonder: is it worth hunting for the 22-805 manual when you can buy a $20 digital multimeter on Amazon?

    Reasons to keep the 22-805:

    Reasons to upgrade:

    If you keep the 22-805, download the manual and store it on your phone. If you buy a new meter, keep the Radio Shack unit as a backup.