Wavetek 1281 in Cary, NC, USA

8.5 Digit Laboratory Multimeter The 1281 is an 8.5 digit Digital Multimeter designed for the most demanding of stand alone and system applications. The 1281 features internal self calibration and external auto calibration. Basic instrument accuracy is +/- 5 ppm per year. True rms AC voltage, 2/4-wire resistance, and ac/dc current are optional.