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is a portable, compact tool designed for home, lab, and field applications. Key features include a
Insert the transistor (NPN or PNP) into the correct E-B-C holes on the socket. The display shows the approximate hFE (gain). 4. Maintenance and Troubleshooting Battery Replacement radio shack 24 range digital multimeter 22-805 manual
If you are unsure of the voltage level, always start at the highest range (500V) and dial down for accuracy. is a portable, compact tool designed for home,
| 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. | Check battery snap connection
RS-232 serial connectivity allows users to log and graph measurements on a PC using original MS-DOS or early Windows software.
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