The Ultimate Guide to the RadioShack 24-Range Digital Multimeter (Model 22-805)
Plug the red lead into the V terminal and the black lead into COM . Turn the dial to ACV or DCV before connecting to a live circuit.
3 3/4-digit LCD with a maximum reading of 3,999 units and an analog bar graph. Safety Rating: CAT II (600V). Key Features
Insert the black lead into and the red lead into V/Ω/mA .
: Provides the full text of the 22-805 owner's manual for public viewing. Sigrok Wiki radio shack 24 range digital multimeter 22-805 manual
A dedicated slide or push button to turn the unit ON or OFF. Turn off when not in use to preserve the 9V battery.
: Includes a diode-check function for testing semiconductor junctions and a continuity buzzer for identifying circuit breaks. Key Features & Safety
Break the circuit open and connect the meter in series so current flows through it. Turn the circuit power back on to read the value. Safety Guidelines and Maintenance
He wiped the test leads on his jeans. He plugged the black lead into COM. He paused, looking at the manual again. The schematic in the booklet showed exactly where the fuse was located— a 200mA fast-blow fuse (Type F) . The Ultimate Guide to the RadioShack 24-Range Digital
Turn the dial to the diode symbol. Touch the red probe to the anode and the black probe to the cathode. A functional silicon diode will display a forward voltage drop between 0.5V and 0.8V. Reverse the probes; the display should read " 1 " (open circuit). Maintenance and Battery Replacement
RadioShack 24-Range LCD Digital Multimeter (Cat. No. 22-805)
Note: The 10A current range is generally unfused on this model; use caution. 3. Getting Started: Controls and Inputs Front Panel Anatomy Shows the numerical reading.
Never attempt a current measurement on a circuit with a voltage above 250V. The 20A input is fused—but a blown fuse won't protect you from a serious mistake. Safety Rating: CAT II (600V)
Reduce the meter range step-by-step to get the most precise decimal reading. 2. Measuring Resistance (Ohms) Turn off all power to the circuit you are testing. Insert the black lead into and the red lead into V/Ω . Set the rotary switch to the estimated Ω range. Touch the probes across the resistor or component.
For decades, Radio Shack was the go-to destination for hobbyists, technicians, and DIY enthusiasts. One of their quintessential tools—the —served as an affordable, durable, and reliable entry point into electronics diagnostics.
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