TD18 series multi-functional calibrators are high-performance multi-functional calibrator which carefully built by over 20 years of advanced technology accumulation. They are designed by advanced large-scale high-speed integrated circuit, complex programmable logic array, high-power integrated power amplifier and other technologies with the advantages of high integration, stable performance and good reliability. They can output excellent performance of AC/DC voltage, AC/DC current, AC/DC power, phase, frequency and other electrical parameters with analog resistance, capacitance, thermocouple and thermal resistance, pulse output and other functions and being capable of calibrating 6.5 and below digital multi-meters and other precision electrical measuring instruments. Optimum accuracy can reach 10ppm and equipped with 50T/100T current coil can calibrate high-current clamp meter.