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

The unit contains internal trim pots (like VR1) used for DC voltage calibration if the meter drifts over time.

Plug the red test lead here for all other measurements (voltage, resistance, low current). COM Jack (Black): Plug the black test lead here. Powering On The 22-805 uses a 9V battery. To install or replace: Remove the test leads from the inputs.

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Follow this quick-start guide to ensure safe and accurate measurements:

RadioShack has ceased operations. However, the 22‑805 and its equivalents (like the Metex ME‑11) can still be found on the used market through auction sites and electronics forums.

Before diving in, it's helpful to note that the RadioShack 22-805 is functionally identical to meters like the Metex ME-11 and Voltcraft ME-11 —an OEM (Original Equipment Manufacturer) product. This means manuals, software, and technical tips for those models are often directly applicable. The unit contains internal trim pots (like VR1)

The 22-805 is functionally identical to the M-1000 and the Micronta 22-805 . If you lost your paper manual, search for those models. And for the love of solder, replace that 9V battery before storing the meter. It leaks, the manual warned you, and you didn't listen.

The RadioShack 22-805 is a . Do not use it on high-energy circuits (main breaker panels, industrial equipment, 480V systems). It’s excellent for:

Read the resistance value. Note: If "1" appears, the resistance exceeds the selected range; turn the dial to a higher range. 4. Continuity and Diode Testing Powering On The 22-805 uses a 9V battery

The true feature of the 22-805 wasn't its LCD screen; it was its tactile interface. Unlike modern auto-ranging meters that do the math for you, the 22-805 required the user to think. You had to know the order of magnitude you were dealing with.

Touch the red probe to the anode (positive end) and the black probe to the cathode (striped/negative end). A healthy silicon diode displays a forward voltage drop between 0.5V and 0.7V. Reverse the probes; the meter should read "1" (infinite resistance). 🧼 Maintenance, Battery, and Fuse Replacement

If you are measuring high current (over 400mA), move the red lead to the 20A jack.

If you're new to using multimeters, practice taking measurements on known sources. This will help you get comfortable with the device and understand its responses.