Questions tagged [test-equipment]

Anything related to test equipments such as multimeter and so on...

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74 views

20VDC LED Illumination

I'm looking to build a simple test circuit, where I can get an LED to illuminate when it senses 20VDC or above, and to remain off if it is sensing any less.
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4answers
2k views

Gold coated multimeter test probes

I found around a couple of damaged "gold coated" probes, after checking the inner wire it happens to be made of cooper, my questions here are simple 1) Why coat the tips if the rest of the probe is ...
5
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1answer
185 views

Measurement and characterization of a non-linear capacitance

Background I am studying a device that is a non-linear capacitance. In fact, structurally it is two parallel plates with a charged fluid in between the plates. The charged species of the fluid can ...
7
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1answer
629 views

What does sequences like 1-3, 1-10, 1-3-10 etc in a spectrum analyzer mean?

I have read in a paper explaining spectrum analyzer basic 'When selecting the RBW(resolution BW), there is usually a 1-10 or a 1-3-10 sequence of RBWs available. More RBWs are better because this ...
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3answers
1k views

Designing a test instrument to be connected to an oscilloscope

I'm working on a piece of test equipment that is intended to be hooked up to an oscilloscope to measure the waveforms it produces. Since that's its reason for being, I figured it made sense to provide ...
4
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4answers
8k views

ESR meter: Are in-circuit readings accurate?

I recently bought one of these ESR meters, a 'MESR-100': http://www.amazon.com/MESR100-AutoRanging-Circuit-Capacitor-Tester/dp/B00G7OPBP2 It claims to be able to test capacitor ESR with the caps ...
7
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4answers
4k views

What is a good way to test maximum current?

I am building a device that can power other devices (it has a voltage regulator, battery controller, etc...). What is a good way to measure how much current it will provide, and/or test if it will ...
0
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3answers
468 views

Looking for test leads for individual PCB header pins or socket pins

While recently debugging a device that had a 7-pin male XLR plug, I was trying to connect to two of the pins in the plug, without touching any of the others, and I wondered if there are test leads ...
10
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5answers
6k views

What parts would one typically use for automated PCB testing?

I have a circuit board in production, primarily through-hole, to the tune of ~400 units per year. Each one is manually inspected and tested. The board has ten distinct voltage rails, four voltage ...
6
votes
1answer
178 views

Scopes and probes

I have a descent set of probes that are rated at 100MHz, overkill for my current scope, only rated at 15MHz, but I am looking at a couple of different options for used scopes right now, some rated as ...
7
votes
3answers
5k views

Why are non-contact voltage detectors sensitive to vibration?

I have noticed that if I slap a non-contact voltage detector against my palm, the LED blinks. I have tried this with four six different detectors, each a different brand, and each clearly a different ...
2
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1answer
145 views

Embedded board level functional test at factory

My embedded project has a GSM and a GPS module. What is the best way to test the radios of these modules after the production of CCA like in a factory conditions.I was thinking of signal generators ...
10
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1answer
4k views

What is “tracking” on a bench power supply?

I'm looking at buying a bench power supply. Some of them have Constant Voltage / Constant Current (CV/CC) listed as a feature, and that I understand. But some also list tracking as a feature. What ...
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2answers
2k views

Simple Faraday cage?

The question Noisy data line clears up on wiring up multiple output pins of uC to Logic Analyzer got me to thinking that the best way to see if outside interference is causing problems for a circuit ...