multimeter vom

First, the multimeter to the test diode end, with the multimeter of the Red pen to one of the transistor's pin, and the other side of the multimeter to test the remaining pins, until the following results are tested: 1, if the transistor's black form pen to connect one of the pins, and the Red Watch pen to test the other two pins are on the voltage display, then

When you solve a user's PC fault, do not forget to use a multimeter to test the power supply. Learn some simple and easy-to-use skills to help you eliminate the possibility of power failure. It may not seem obvious, but more than 1/4 of PC problems are related to power problems to some extent. You may think that if there is a problem with the power supply, the PC will not start up at all, and the culprit will be easily identified. But the problem is

How to use the digital Universal meter to measure the polarity of transistors and the method of NPN, PNP . First of all, say the pointer of the multimeter and the digital multimeter of the red-black pen and the internal battery connection difference;So there are some differences between the two types of tables. Next, just talk about how to use the digital measurements. Use a digital

Digital multimeter test and the pointer multimeter is different, then how to test the polarity of the transistor with a digital multimeter. First, the multimeter to the test diode end, with the multimeter of the Red pen to one of the transistor's pin, and the other side of

Currently, almost all digital multimeter use dedicated integrated circuits for A/D conversion. Table 1 lists some common number table A/D chip configurations. I. Replacement of the mode/number Converter Currently, almost all digital multimeter use dedicated integrated circuits for A/D conversion. Table 1 lists some common number table A/D chip configurations. Icl7106, icl7126, and icl7136 belong to th

Summary 2--- multimeter measures the voltage of square wave and sine waveThe voltage of the square wave measured by the multimeter is the average and the sine wave is a valid value.The reason is: the multimeter uses the integral ADC, the results are averaged. ... Why is this, check the time, then continue!!---------------------------------------------------------

Method one dials the pointer multimeter to the "rx1k" file, and the ESC is zeroed. The field effect is the same side of the word, from left to right: G (Gate), D (drain), S (source). The Black Watch pen is connected to the D-Pole, the red pen is connected to the S-pole, at this time, the multimeter hands should not move, and then swap the pen, then test, at this time, the

can determine the type of conduction of the tube according to the direction of the PN junction between the base electrode and the other two electrodes. The multimeter of the black pen contact the base, the Red pen contact with the other two electrodes in any of the electrodes, if the table head pointer deflection angle is very large, then the test transistor is an NPN type tube; If the head pointer deflection angle is very small, then the tube is the

Reprinted from: http://wenku.baidu.com/view/899ae713a2161479171128a3.html Note: This document uses the ut60e digital multimeter as an example. 1. When a digital multimeter is used to measure the diode, the positive voltage value of the diode is measured, and the positive and reverse resistance value of the diode is measured. That is, the digital multimeter,

Fluke Networks Fluke Network) recently released a new NetTool II series online network multimeter with the NetProve diagnostic function. It diagnoses Enterprise Network and application connectivity faults four times faster than traditional methods.The newly released NetTool II series has a simple one-step NetProve test function, allowing technicians to quickly and conveniently identify the root cause of the problem regardless of their expertise. The N

Digital Multimeter is now a very popular electronic measurement tools, because of its ease of use and accuracy by the electronic technology staff's favorite. However, it is often said that when measuring certain components, it is not as convenient as a pointer multimeter, especially when measuring transistors. In fact, I feel a digital multimeter to measure the t

The following is the structure of the transistor and the various identification methods in the circuit diagram When the multimeter is measured against the transistor (buzzer), we first determine which foot is the B-pole. With a red pen touch any one of the feet, the black pen to contact the other two feet, if you can measure the two groups of similar and less than 1 of the number, indicating that the Red pen contact is the B pole. If the two sets o

Observe in the same lighting environment and record the following three points:1. the infrared emission diode is visible in the right side of the lens. It has a shape similar to a small cross, and the photosensitive diode is a single point and there

of electronic components are caused by failure or damage. Therefore, how to correctly detect electronic components is particularly important. This is also a skill that must be mastered by electronic maintenance personnel. I have accumulated some common electronic component testing experience and skills in electrical appliance repair for your reference. 1. Test the polarity of each foot of the rectification Bridge The multimeter sets the R × 1k bloc

need to explicitly write the decimal point: Nest. SetStatus (Neuron, {"I_e": 376}) Will cause an error. This is handy to protect us from integer division errors, which are difficult to find.Next we create a multimeter, which is a device that we can use to record the neuron's membrane voltage changes over time. We set the time of its properties so that it will also record the time point at which the membrane voltage is sampled. The Recor

common interface in a router device. Although RS-232 and UART are compatible in terms of protocol, they are not compatible in terms of voltage. UART is usually operated at 3.3 volts, but it can also run at other standard voltages (such as 5 volts and 1.8 volts. In the subsequent sections, the descriptions of the router serial port refer to UART without special instructions. Shows the serial interface on the Linksys WRT54G v2.2 vro motherboard.16.2.1 serial port Probe Next we use the basic obser

1 fixed capacitor DetectionA is a small capacitor below 10 PF. Because the capacity of the fixed capacitor below 10 PF is too small, the multimeter can only be used for measurement to check whether there is leakage, internal short circuit or breakdown. During measurement, you can use a multimeter r×10k block, and use two pen to connect two pins of the capacitor separately. The resistance value should be inf

Before the method of judging the transistor is used by the memory method, that is, as long as the three-level tube series Let it have a face of their own words, from left to right in turn is E-Class B class C. Until one time in the process of using the transistor circuit in a mistake, found that the pipe is always inexplicable conduction, find a good reason for a long time, finally found that the NPN tube has a sequence of e-Class C-Class B. In order to prevent further errors, and then found a v

Protection Board circuit principle and working process1. Schematic diagramSame as the single power-saving core, in the multi-energy-saving core protection circuit, the protection board must also be able to provide overcharge, over-discharge, over-current, short-circuit protection.Dual power-saving core protection board schematic diagramSix, general Protection Board Bad Reason analysis method1, no display (no voltage, charging, no load voltage low): When the battery is found no display, you can

1 People for Wake Power detection In short, it is to connect the computer motherboard 20 pin plug, with a wire (such as a thin wire, the specific people to play the imagination) a green line, a black line (there are 8), if the power supply fan turned on the power is good. With a thin wire to the ATX plug 14 feet ps-on and the other end of the 3rd, 5, 7, 13, 15, 16, 17 feet of any short foot connection, this is the ATX power supply in standby state of artificial wake-up start, when the ps-on si