As a result of feature-rich and easy to carry, high precision measurements, easy to read directly and other advantages, so we electrician practitioners in the hands of the multimeter is mostly digital, and in recent years, with the automatic conversion of the range of digital multimeter prices jumped significantly, this kind of multimeter has also become the industry counterparts of the standard equipment. But we spend money to buy a multimeter, do you really understand all its functions, and is not able to fully understand its function keys corresponding to the role of which? Today, we will start from most of the digital multimeter, some common English annotated function keys to talk about, so that we can thoroughly play out the function of the hand tool, do a little knowledge popularisation.

ON/OFF: The meaning of this English note button is almost known to everyone - on/off. However, if you are in the hands of the multimeter switching button for the point of self-locking button, you need to pay attention to do not operate frequently, otherwise the service life of this button will be greatly reduced. Realistically speaking, some of the peers to replace the button is not in the line ah!

REL: The English comment key is the zero/zero function key. This function is mostly used in the precise measurement of resistance value, capacitance value and other environments - it is well known that due to the existence of the multimeter pen, it will make the measurement of small resistance value resistance, small capacity capacitance in the process of error! If the function key is pressed before measurement, so that the multimeter indicator value to zero (or maximum tend to zero), and then carry out the measurement operation, it will greatly reduce the measurement error. In addition, this function can also be used to functionally self-test the multimeter.

MAX/MIN: This English annotation key is the maximum/minimum value reading function key. This function is mostly used to monitor the electrical parameter values of some process variables, such as the electric potential generated in the process of testing thermocouples; correction of Hall-type current transformer process. In short, this function is very helpful for debugging electrical equipment.