22-805 Manual — Radio Shack 24 Range Digital Multimeter
The meter includes an RS-232 serial port for connecting to a PC, allowing users to log and graph measurements live. Analog Bargraph:
RadioShack 22-805 is a 24-range handheld digital multimeter (DMM) known for its -digit display (4,000 counts) and vintage RS-232 serial connectivity , which allows for data logging to a PC. Internet Archive Key Specifications Voltage Ranges : Measures up to Current Measurement : Capable of measuring AC/DC current up to Resistance : Measures up to Display Features : Includes an analog bargraph to show signal magnitude and a function to freeze readings. Safety Rating : Rated for CAT II (600V) applications. Internet Archive Operating Instructions
He sat on an overturned bucket and studied the faceplate. The legends were worn. He needed the .
Do not change the rotary switch settings while probes are connected to a live circuit. radio shack 24 range digital multimeter 22-805 manual
Set the rotary selector switch to the appropriate range.
When working with electrical systems, always follow these safety precautions:
Note: This post is for informational purposes. RadioShack is a registered trademark of its current owners, who are not affiliated with this content. The meter includes an RS-232 serial port for
RadioShack 24-Range LCD Digital Multimeter (Cat. No. 22-805)
Plug the black test lead into the (Common) jack and the red lead into the V/Ω/mA jack.
-digit LCD display and a unique computer interface for advanced data logging. This manual-ranging meter is designed for field, lab, and home applications, offering a high count of 4,000 for precision. The supports the following standard electrical measurements: Voltage : Measures up to 1000V DC and 750V AC . Safety Rating : Rated for CAT II (600V) applications
This model was designed as a "pro" level tool for hobbyists and technicians. : Voltage : Up to Current : Up to for both DC and AC. Resistance : Up to
: A formatted online version covering key features.
: Measures both AC and DC current up to 20 Amperes (high-current path).
Let’s decode the name. "24 Range" doesn't mean it measures 24 different things. It means that via the giant, satisfyingly chunky rotary dial, you have 24 distinct positions. You get the usual suspects: DCV (from 200mV to 1000V), ACV (200V to 750V), Resistance (200Ω to 2000kΩ), and DC Current (200µA to 10A). But here’s where the 22-805 gets quirky: It includes a dedicated and Transistor hFE Test (via a weird little six-socket port on the front).
The basement of the old industrial complex was a graveyard of forgotten technology. Elias, a contractor who specialized in restoring pre-war electronics, moved a heavy wooden crate aside, coughing in the dust. He wasn't supposed to be here, but the client had been desperate to find the control module for a defunct heating system, and the blueprints said it was buried here somewhere.