Questions tagged [test-equipment]

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

Filter by
Sorted by
Tagged with
2
votes
1answer
250 views

RF generator TX antenna with low impedance can damage generator?

I got an RF generator R&S HAMEG HM8135 that I use in a testsystem to generate FM and AM stimuli in order to check if FM antenna and AM antenna is correctly mounted on the testobject in a ...
0
votes
1answer
128 views

What is “mains outlet tester” (for proper wiring) in the context of US power connector standard?

I'm curious about this comment. It says what ... in the US or UK you should be able to go to a hardware store and buy an outlet tester for very little money. This is a little plastic housing ...
3
votes
4answers
5k views

Is there such a thing as a pin (or pogo pin) clamp for testing?

I'm an amateur tinkerer of electronic components, and was wondering if a product like I'm about to describe exists for testing components. Say you have an arduino pro mini board. You want to access ...
0
votes
2answers
736 views

What is the general operating principle of an AC Electronic Load?

I'm working my way through electromagnetics and in particular power (line) transformers at the moment. I'd like to be able to run tests of various kinds at different AC loads and possibly at different ...
1
vote
1answer
40 views

Which instrument for arbitrary signal commutation (matrix)

I would like to test a bunch of sensors. Each sensor has a DB15 connector with mixed digital and analog signals (bw ~5MHz, Z ~120R). I am looking for an instrument where I can control which couple ...
3
votes
1answer
787 views

Why does inserting a resistance in the common of my scope probe cause it to pick up AC noise so much worse?

I'm poking at the inside of a USB oscilloscope, with the hope of modifying it so that the scope probe commons can be referenced to different voltages. When I use my USB oscilloscope to measure a 24V ...
3
votes
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 ...
3
votes
1answer
94 views

How to test/flash many modules?

Suppose I have several hundred pieces of the same module to test and flash, and the connectors themselves have wire holes in them like below. What's a good way to make the connection without soldering?...
0
votes
2answers
2k views

Finding out the length of a cat6 cable

I noticed this tester had precise length readings of short cables. I decided to plug a very long cable (almost a full pack) and was surprised to see it still gives a reading. 232 meters: Adding the ...
1
vote
2answers
1k views

nichrome alternatives

I am repairing an AVO multiminor Mk 4 which was in a sort circuit across a car battery while in the 1 amp measuring position. circuit diagram here an obvious casualty was the 0.25 ohm resistance R1 ...
-1
votes
1answer
4k views

What resistance/ load do battery testers (AA or AAA) use in Ohms please

Trying to find out what size resistors (Ohms) a AA or AAA battery tester would use? Have tried searching but unable to find an answer I meant testing alkaline and ni-mh 1.5volt and 1.2 volt batteries ...
1
vote
1answer
552 views

Are old frequency counters good deals or a waste of money?

Other than knowing that you get the best results from a frequency counter by using a high quality crystal, like an oven crystal, I don't know too much about a frequency counters. I notice that you ...
0
votes
1answer
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.
11
votes
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 ...
11
votes
5answers
7k 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 ...
5
votes
1answer
189 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
votes
1answer
655 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 ...
1
vote
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 ...
0
votes
3answers
488 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
votes
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 ...
7
votes
3answers
6k 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 ...
6
votes
1answer
180 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 ...
2
votes
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 ...