Radio Shack 24 Range Digital Multimeter 22-805 Manual
This comprehensive 36-page document contains all the necessary safety warnings, operating procedures, and technical specifications you need.
If you’re holding a vintage RadioShack 22-805 (catalog number 22-805, often called the "24-Range Digital Multimeter"), you have a piece of classic test equipment on your hands. These meters were workhorses for hobbyists and pros alike from the late 1980s through the 1990s.
: Safely monitors low current via fused paths, and heavy loads up to 20 Amps via a dedicated high-amperage terminal. Resistance : Measures up to 40 Megohms (MΩ) .
It was a relic from a different era of troubleshooting. The LCD screen was protected by a slightly yellowed plastic window, and the rotary dial felt heavy and substantial as he thumbed it. The device was intact, but Elias knew better than to trust old gear blindly. He needed the instructions, the secret code to unlocking the tool's potential without frying the circuit he was trying to save. radio shack 24 range digital multimeter 22-805 manual
He looked back at the 22-805. It was a robust machine—famous for its fused current protection and the ability to measure both capacitance and temperature with the right attachments. But without knowing the specific jack configurations for the 10 Amp versus the 200mA fused inputs, a wrong guess could blow the internal fuse instantly.
Incorrect readings or a fading LCD usually point to a low battery. Replacing the Battery Turn off the multimeter and disconnect both test leads. Remove the screws from the back cover of the housing. Carefully lift off the back cover.
Disconnect all power sources from the component or circuit being tested. : Safely monitors low current via fused paths,
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) .
: If the meter fails to measure current, check the internal fuses. Always disconnect the test leads and turn off power before opening the back cover. Internet Archive Manual Resources
The 22-805 uses two fuses for overcurrent protection: an 800mA/250V 5x20mm fuse for the low-current mA ranges, and a 20A/250V 6x30mm (super fast-blow) fuse for the high-current 20A range. Always replace a blown fuse with one of the exact same type and rating. The LCD screen was protected by a slightly
measure AC voltage exceeding 750V or DC voltage exceeding 1000V.
The RadioShack 24-Range LCD Digital Multimeter (Catalog Number 22-805) Go to product viewer dialog for this item.
For those who like to tinker, the meter’s serial protocol is simple and well-documented. You can communicate directly by sending the command "D" (for "download") or a carriage return over the serial line. The meter will immediately respond with a reading, such as DC 42.034 V <CR> .
-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 .
