The HP-37C meter is a 6000-bit automatic range digital multimeter that is newly developed by our company and has a novel handheld LCD display.Its display number is 25mm high, making it easy for users to read. The instrument used in the design of a wide range of advanced, high-capacity chips, used to measure AC and DC voltages, AC and DC current, resistance, capacitance, frequency, duty cycle, temperature, battery voltage, and the diode forward voltage drop On-off test, as well as non-contact AC voltage measurement (NCV) sound and light indication function, with relative value measurement, data retention, intelligent automatic backlight and automatic shutdown function. The intelligent backlight can automatically sense the brightness of the external environment. When the external light is dark, the backlight can be automatically turned on, which saves the trouble of manual opening and facilitates the measurement of dark places. The instrument compact structure, with a safety shield, easy to operate, easy to carry, the whole power consumption is small, is ideal for electrical measurements.