Radio Shack 24 Range Digital Multimeter 22-805 Manual ((link)) -

To use the 22-805, follow these standard procedures for digital multimeters: Preparation Insert the black probe (common) jack. Insert the jack for voltage and resistance, or the jack for current. Voltage Measurement Rotate the dial to the setting (solid/dashed line for DC, wavy line for AC). If the meter is not auto-ranging, start with the highest range and dial down for better precision. Resistance and Continuity Set the dial to the (ohm) symbol. Ensure the circuit is and capacitors are discharged before testing.

: Includes RS-232 connectivity for logging and graphing data on a computer (originally designed for Windows 95/98). radio shack 24 range digital multimeter 22-805 manual

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