What these multimeter function keys do
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!
HOLD: The English note button for the numerical value to keep the function of the key. This function will be required to retain the data retained in the screen display, for recording or comparison purposes. In addition, in the measurement process is not easy to read, the existence of this function is also extremely meaningful.
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.
SELECT: This English annotation key is the measurement type switching function key. Some multimeter manufacturers, in order to overcome the inherent mechanical wear and tear of the multimeter's traditional measurement function conversion toggle selector switch, greatly reduce the number of measurement selector gears and at the same time give multiple functions to individual measurement gears, e.g.: Voltage V gears, with both AC and DC measurement functions; resistance Ω gears, often with resistance, diode bias voltage, on/off three measurement functions, and the selector switch is completed by this function key. Switching is done by this function key. Of course, this form of multimeter, for those who are not careful enough in the work of the counterparts is simply "burn table" catalyst!
RANGE: The English key is the function key for selecting the auto/manual measurement mode of the multimeter (auto range switching multimeter). The multimeter automatic conversion range mode switch to manual shift mode, you can improve the measurement accuracy to a certain extent.
HZ/DUTY: This English note key is the switching function key of frequency and duty cycle measurement for multimeter frequency measurement. This function key is mostly applied in the multimeter containing frequency test function so that everyone can intuitively understand the general situation of the measured signal. This function is very practical for the maintenance of switching power supply, inverter, soft starter, servo controller, medium/high frequency furnace and other electrical equipment.
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.
LIGHT: This English annotated key is the backlight on key. There is no need to say more about this function, but after turning on the function, it will accelerate the consumption of the battery in the multimeter, so it is best to do this function: turn it off as you use it.
