Radio Shack 24 Range Digital Multimeter 22-805 Manual ((top)) ★ Certified & Validated
The RadioShack 24 Range Digital Multimeter 22-805 is a versatile and reliable tool for anyone working with electronics. By understanding its features, specifications, and operating procedures, you can unlock its full potential and take accurate measurements with confidence. Remember to follow safety precautions and perform regular calibration and maintenance to ensure optimal performance.
Simply put:
: Includes an RS-232 serial port for connecting to a PC, allowing users to log and graph measurements using supplied software. Safety Rating : Rated as CAT II ( ) with double insulation protection.
He checked the pouch on the lid. Empty.
"Fuse," Elias said, clicking his tongue.
: Includes an analog bargraph display alongside the digital readout to show the magnitude of input relative to the full-scale range.
Touch the probes to the component. If the component is part of a circuit, it should be isolated for an accurate reading. radio shack 24 range digital multimeter 22-805 manual
You might wonder: is it worth hunting for the 22-805 manual when you can buy a $20 digital multimeter on Amazon?
Always try to select the appropriate range for your measurements. Starting with a higher range and then adjusting downwards can help prevent damage to the multimeter.
| Problem | Probable Cause | Solution (from manual) | | :--- | :--- | :--- | | No display, no segments | Dead 9V battery | Replace battery. Check battery snap connection. | | Flashing "BAT" symbol | Low internal battery | Replace battery (9V). Reading may be 10-20% off. | | Reads "1" on all ranges | Overload condition, or test lead not fully seated | Check V/Ω and COM jacks. Turn dial to OFF then on. | | No continuity beep | Beep disabled, or leads damaged | Check dial is on buzzer symbol. Short leads – if no beep, replace leads. | | Blows fuse on 200mA range | Measured >200mA | Replace with 200mA/250V fast-blow. Do not use slow-blow. | | AC voltage reading unstable | Dirty dial contacts | Rotate dial back and forth 10-15 times. Clean with DeoxIT. | The RadioShack 24 Range Digital Multimeter 22-805 is
If you connect the test leads backward, the meter will automatically display a negative sign, protecting the meter from damage.
Features a serial RS-232 port for real-time data logging and readings on a computer. Safety Rating: CAT II (600V). Core Button Functions
First and foremost, the manual served a critical safety function. Unlike modern auto-ranging meters that hide complexity from the user, the 22-805 was a manual-range multimeter. Selecting the wrong setting—for instance, measuring 120V AC on the 200V DC range—could damage the unit or cause injury. Consequently, the manual’s first sections were devoted to explicit warnings and procedural checklists. It taught a generation of hobbyists the cardinal rule of diagnostics: always start with the highest range and work down. This document transformed a potentially dangerous piece of equipment into a safe learning tool for teenagers and garage tinkerers. Simply put: : Includes an RS-232 serial port
The "24 range" refers to the combination of positions on the rotary dial—voltages (AC/DC), currents (AC/DC), resistances, and special functions like continuity and battery testing.