What is HFE on a multimeter and how do you use it?
The HFE file on the multimeter is to measure the crystal transistor current amplification, and there are sockets for measuring the crystal transistor on this kind of meter. hFE file is mainly used to measure the amplification of β-value, and before the measurement, it should be determined that the transistor is PNP or NPN type, and at the same time, it should be determined that the polarity of each pin.
Usage: Insert the triode into the corresponding polarity socket when measuring, and you can read the current amplification of the triode.
Other precautions for use
1, in the process of using the multimeter, you can not use your hand to contact the metal part of the pen, so that on the one hand, you can ensure the accuracy of the measurement, on the other hand, you can also ensure personal safety.
2,When measuring a certain amount of electricity, you can't change the gear at the same time of measuring, especially when measuring high voltage or high current. Otherwise, it will destroy the multimeter. If you need to shift, you should first disconnect the meter pen, and then measure after shifting.
Notes on the maintenance of digital multimeter
Digital multimeter is a precision, do not arbitrarily change the line, and pay attention to the following points.
1, do not use over range.
2,Don't use the multimeter when the battery is not installed or the back cover is not tightened.
3,After the multimeter is used, the switch should be placed in the "OFF" block. If the multimeter is not used for a long time, the battery inside the multimeter should be taken out, so as to avoid the battery corrosion of other devices inside the meter.
4, only after the test pen is removed from the multimeter and the power is cut off, the battery and fuse can be replaced. Battery Replacement:Pay attention to the use of 9V battery, if you need to replace the battery, open the screws of the back cover and replace the battery with the same type, when replacing the fuse, please use the same type of fuse.
