Right now I'm on the
hunt for a bench multimeter, and it's a grave understatement to say there are options abound! Enter into the handheld space, and there are literal excel spreadsheets with hundreds of options. Pick whatever color you want!
Another piece of test equipment that would be very useful for what I do is a good LCR meter. Mostly what I deal with is replacing capacitors on amplifier or power boards that have become wonky/annoying. It's helpful to know if the capacitor I've removed is, in fact, the source of whatever problem I might have, and testing an old vs new capacitor is a good way to do so...
But so far as I can tell, there aren't many good options out there. New, used, vintage, chinese, American, you name it. I appreciate capacitance measurement is less straightforward than resistance, current, or voltage measurement, but they're just about the second most ubiquitous thing in electronics after resistors!
Right now I have three ways of measuring capacitance, all of them not-ideal. I have a Hioki handheld multimeter that does a pretty damn good job but doesn't give any information beyond capacitance. I have a cheap-o chinese handheld thing that I don't trust at all, and then I have the $20 mTester guy that shoots way above its weight.... and gives an ESR! but its weight class is measured in grams so not a high bar there.
Now I'm looking for a bench capacitance tester, and I'm quickly seeing prices for massively complex equipment shoot into $1k range for dubious used options.
Whenever I go into deep rabbit holes researching equipment, I make notes to myself so that when I again enter the rabbit hole I have a good starting point. Here's what I have written:
Best LCR Meter:
Notes:
- Capacitors offer different response at different frequencies
- an ideal capacitor has an ESR of 0Ω for an AC signal
- LCR meters require competence and experience for the user
- Hioki has terrible support for old devices, avoid
BK Precision 879b
- 880 has DCR and is 100khz vs 10khz for 879b
- has ESR
- poor build quality/reliability
Keysight U1731C
- U1732C has 10khZ vs 1kHZ for U1731C
- [url]https://www.keysight.com/us/en/catalog/key-34689/u1700-series-handheld-capacitance-lcr-meters.html[/url]
- U1733C sold on eBay for $250, others <$200
Cheap Option:
- DE-5000
Even Cheaper Option:
- Amazon kit meter (Purchased)
None of these are bench meters, the best option seems to be the Keysight!
Those who have gone down this rabbit hole, what conclusions have you reached? Are there good vintage units available? Key things to look for? Maybe you just do the work yourself with a function generator and an ammeter to test capacitors? Surely this isn't a fast/elegant solution.
Capacitors.... so underappreciated