주제를 살펴보자 “fluke 8808a – Fluke 8808A 벤치 형 멀티 미터, 1 부” 카테고리에서: Blog MMO 에 의해 컴파일 Ko.nataviguides.com 다양한 소스에서. 저자별 기사 EE World Online 가지고 조회수 8,405회 그리고 의지 좋아요 58개 높은 평가.
이에 대한 추가 정보 fluke 8808a 주제에 대해서는 다음 문서를 참조하십시오. 아이디어가 있으면 기사 아래에 댓글을 달거나 주제에 대한 다른 관련 기사를 참조하십시오.fluke 8808a 관련 기사 섹션에서.
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아래는 주제에 대한 자세한 비디오입니다 fluke 8808a – Fluke 8808A 벤치 형 멀티 미터, 1 부. 계속 주시하고 읽고 있는 내용에 대한 피드백을 보내주세요!
Fluke 8808A 벤치 형 멀티 미터, 1 부 – fluke 8808a 및 이 주제에 대한 세부정보
주제에 대한 설명 fluke 8808a:
Part One of a demonstration of principle functions and features of the Fluke 8808 bench-type multimeter.
TRANSCRIPT:
Hi and welcome to our 57th Test and Measurement Video. Right now we’ll look at the amazing Fluke 8808A bench-type multimeter. For perspective, here are some far less sophisticated but sometimes useful tools that will measure electrical energy.
This plug-in socket equipped with a durable and rugged appliance bulb is a quick and easy receptacle tester that electricians like for working on branch circuits. To find a defective termination, you can put one of these in each wall receptacle and from the other side of the room they can be monitored, which is helpful in working on intermittents.
The neon test light is great for checking out presence or absence of voltage in entrance panels and motor controllers, just to get a preliminary idea of what is going on. Variations in brightness permit the user to differentiate between 120 and 240 volts.
The solenoid voltage tester, so-called Wiggie, is convenient for quick presence or absence of voltage tests. It makes a visual and audible report, and when you touch the probes to live terminals, it vibrates, so it is great for noisy environments and also when it is not convenient to keep your eyes on the meter. The solenoid voltage tester is a low-impedance instrument, so it is not suitable for sensitive electronic measurements, because it loads the circuit and draws a significant amount of current. It is used for house current and general-purpose electrical work. It should not remain connected for any length of time or it will overheat.
Low-end digital multimeters can be bought in big box stores for as little as $10, but they are neither accurate nor durable, and the continuity beeper quits working after a few uses. A higher-priced hand-held multimeter is useful in many applications. Quality and durability vary widely, but it is actually the workhorse of the industry. For under $500, a superb hand-held multimeter can be purchased and there is no reason that, except for the battery, it should not last a lifetime, maintaining a very reasonable level of accuracy.
Today we’re looking at a far more precise and extraordinarily well-designed instrument. This 8808A bench-type multimeter has the superb built-in features and over-all quality that we are accustomed to seeing in Fluke products. The meter is rugged and over-all a very smart machine.
The dark-colored buttons in the middle row below the display are function keys, similar to just about all multimeters. Here’s a rundown:
Just after the manual range control is DC Volts. Notice that when the probes are not connected to an energy source, there is a fairly low reading that seems to fluctuate. This is called phantom or ghost voltage and it is a consequence of the fact that we are using a very high-impedance meter, meaning that it places a negligible load on the circuit being tested. It constitutes a voltage divider with such high impedance that a minute amount of current that comes from capacitive coupling or a probe acting as an antenna can cause a significant voltage drop. If we shunt this 3000-ohm resistor across the probes, most of the phantom voltage is suppressed. Watch as it drops down to a tenth of a millivolt.
You don’t have to be too concerned over phantom voltage, because as soon as you hook onto a real quantity, the meter’s autorange kicks in and the reading stabilizes. Here’s a 1.5 volt AA cell, which reads 1.6 volts since it is brand new. Notice the very small noise floor that shows up at the fifth decimal place.
Next on the agenda is AC volts, and one good thing about these probes is that unlike many they fit easily into a receptacle or cord connector to give a good reading. The utility voltage is shown at 122 with a little decimal point activity, probably due to loading fluctuations in the neighborhood.
While we are connected to the powerline, we’ll demonstrate two other features of this amazing instrument. The update rate can easily be changed by the user. Pressing the Rate button, the fifth from the left in the row of white buttons at the bottom, the update rate, which corresponds to how frequently new measurements are displayed, can be made slow, medium or fast. Right now it is fast, and the fluctuations are very rapid. And this is what slow looks like.
With the Fluke 8808A multimeter still plugged into the grid that includes all major power plants in Canada and the USA connected in parallel, we’ll move to the right and press Frequency. A very stable 60 Hz is displayed, because frequency does not change except for a maximum phase shift of 90 degrees with a hypothetical purely reactive load.
자세한 내용은 Fluke 8808A 벤치 형 멀티 미터, 1 부 의견 섹션에서 또는 주제에 대한 다른 기사를 확인하십시오 fluke 8808a.
키워드 정보 fluke 8808a
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기사 fluke 8808a – Fluke 8808A 벤치 형 멀티 미터, 1 부 우리는 인터넷의 다양한 소스에서 편집합니다. 이 기사가 유용하다고 생각했다면. 더 많은 사람들이 볼 수 있도록 공유로 응원해주세요! 감사해요!
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주제에 대한 사진 Fluke 8808A 벤치 형 멀티 미터, 1 부 항목의 내용을 더 잘 이해할 수 있도록 항목을 설명하는 데 사용됩니다. 필요한 경우 댓글 섹션이나 관련 기사에서 더 많은 관련 사진을 찾을 수 있습니다.
주제에 대한 기사 평가 fluke 8808a
- 작가: EE World Online
- 보다: 조회수 8,405회
- 좋아요 수: 좋아요 58개
- 동영상 업로드 날짜: 2016. 12. 28.
- URL 비디오: https://www.youtube.com/watch?v=1mchNO9rd-o
기사의 키워드 Fluke 8808A 벤치 형 멀티 미터, 1 부
- EE World
- EE
- electronic engineering
- design world
- Fluke
- oscilloscope
- oscilloscopes
Fluke #8808A #벤치 #형 #멀티 #미터, #1 #부
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