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Tektronix DM 502A 3 1/2 digit DMM. This multimeter measures six functions with push button convenience. Autoranging, in all modes except current, makes it exceptionally easy to use without having to select ranges. The instrument measures dc and ac voltage, dc and ac current, dB, and resistance. It provides true RMS measurements in all AC modes, which provides more accuracy with distorted, noisy or other non-sinusoidal ac waveforms. The resistance mode also offers Hi-Lo voltage (2v to 0.2v) modes. This user-selectable feature allows in-circuit ohms measurements without turning on diode or transistor junctions. The high-voltage mode allows you to test semiconductor junctions for forward and reverse resistances. The unit offers a 0.1% dc accuracy and overall accuracy is better than that on this unit.
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The DMM 502A Digital Multimeter measured dc and ac voltage and current, dBm, dBV, resistance, and temperature. The ac functions are true RMS responding. The ranges for dc voltage, ac voltage, dBm, dBV, and resistance are automatically or manually selected as desired. The current and temperature ranges are manually selected.
The readout is a 3 ˝ digit display using seven segment LED. The decimal point is automatically positioned depending on the operating range of the instrument. Polarity is indication is automatic.
Electrical Characteristics: