★ Equipped with a 32-bit MCU processor and a temperature control meter series universal chip, it can run over 500000 units stably; ★ Sampling speed of 200mS per channel, display update speed of 1 second per channel; ★ Using internal AD of the chip for optimization calculation to ensure 0.5% F.S measurement accuracy, using low-temperature drift components, and achieving design requirements for temperature drift within the range of 0-50 degrees to ensure accuracy range; The power supply adopts reinforced design, imported chips, and universal platform standard components. More than 500000 instruments have been powered on and operated stably; ★ Lightning surge meets the IEC61000-4-5 standard; Pulse group anti-interference meets the IEC61000-4-4 standard; ★ The anti-static ability meets the IEC61000-4-2 standard; The safety level meets the IEC61010-1 standard.