What are the functions of these function keys on the multimeter?
Due to its various advantages such as rich functionality, easy portability, high measurement accuracy, and ease of direct reading, most of the multimeters in the hands of electricians are digital. In recent years, with the significant price drop of automatic range conversion digital multimeters, such multimeters have become a standard tool for peers in the industry. But do you really understand all the functions of the multimeter that everyone spends money on, and can you fully understand the corresponding functions of its function keys? Today we will talk about most digital multimeters and common English annotation function buttons, in order to fully utilize the functions of our tools and promote knowledge.
ON/OFF: Almost everyone knows the meaning of this English annotation button - on/off. However, if the power button on/off of your multimeter is a touch lock button, be careful not to operate it frequently, otherwise the service life of this button will be greatly reduced. To be honest, some peers are not good at replacing this button!
HOLD: This English annotation button is a numerical hold function key. This function retains the required data to be displayed on the screen for recording or comparison purposes. In addition, the existence of this function is also very meaningful when it is inconvenient to read during the measurement process.
REL: This English annotation button is a reset/calibration function key. This function is often used for precise measurement of resistance values, capacitance values, and other environments - as is well known, the presence of multimeter probes can cause errors in measuring small resistance values and small capacitance values! If the function key is pressed before measurement to reset the reading of the multimeter to zero (or approach zero to the maximum extent), and then the measurement operation is carried out, it will greatly reduce the measurement error. In addition, this function can also be used to perform a functional self-test on the multimeter.
SELECT: This English annotation button is a function key for switching measurement types. Some multimeter manufacturers, in order to overcome the inherent mechanical wear characteristics of the traditional measurement function conversion dial selection switch of multimeters, have greatly reduced the number of measurement selection gears while assigning multiple functions to individual measurement gears, such as voltage V gear, which will have both AC and DC measurement functions; The resistance Ω range often has three measurement functions: resistance, diode bias voltage, and on/off, and the selection switch is completed by this function key. Of course, this form of multimeter is like a catalyst for "burning the meter" for colleagues who are not careful enough in their work!
