Dual Diplay Digital Process Calibrator. Digital Process Tester. Measuring and Output Source. High-Accuracy Dual Display Digital Process Calibrator :• measure and output signal simultaneously.• 3,3/4 dual display• Precision 1000V, 400 mA digital multimeter • Measure AC and DC volts, AC and DC current, resistance, continuity, frequency and temperature and break-and-make, diode and triode test.• 0.1 ...