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

Exercise extreme caution when working with voltages above 60V DC or 30V AC RMS.

The high-current input terminal used strictly for measuring large currents up to 10 Amperes. ⚡ Step-by-Step Operating Instructions 1. Measuring AC or DC Voltage

measure voltage higher than 500V DC/AC on the 200mV or 2V ranges.

-digit display (up to 3,999 units) and unique PC connectivity via an RS-232 interface.

: Features auto-polarity operation and is protected by double insulation to reduce electric shock risks. radio shack 24 range digital multimeter 22-805 manual

: A visual representation of measurements relative to the full-scale range.

: Use the RS-232 Connectivity documentation from sigrok to interface with modern software. Safety Warnings

Insert the black lead into and the red lead into V/Ω/mA . Turn the rotary switch to the desired DCV or ACV range.

Whether you are looking to service consumer electronics, debug home appliances, or archive measurement data onto a legacy computer system, keeping this technical manual handy is vital. This comprehensive guide synthesizes the critical operational parameters, circuit-testing steps, and safety constraints specified in the official owner's manual. Core Specifications & Limits RadioShack 22-805 Go to product viewer dialog for this item. Exercise extreme caution when working with voltages above

stands out due to its comprehensive measurement range and superior display configuration. Below are the fundamental core features embedded within the unit: : Equipped with a

The Radio Shack 22-805 uses a Metex 14 protocol , a common command interface that modern software supports. It communicates at a very slow 600 baud with a data format of 7 data bits, no parity, and 2 stop bits (7N2). To connect the meter’s DB-9 serial port to your modern PC, you will need a USB-to-Serial (RS-232) adapter.

RadioShack supplied two programs to log and display data:

The original cable was a standard DB‑9 (male‑to‑female) serial cable. You can find replacements at electronics recyclers or online marketplaces. A will also be necessary to connect to a modern computer. Measuring AC or DC Voltage measure voltage higher

The RadioShack 22-805 is an advanced tool for its time. Its core specifications provide a clear understanding of its capabilities:

Disclaimer: This guide is a summary of typical Radio Shack 22-805 operating procedures. Always refer to the physical manual that came with your specific unit for the most accurate safety information and specifications.

To operate the multimeter safely, you must understand its interface layout. Input Jacks

Radio Shack 24-Range Digital Multimeter (Catalog Number 22-805) Go to product viewer dialog for this item.

If you connect the test leads backward, the meter will automatically display a negative sign, protecting the meter from damage.