Products > Test Equipment
Shannon ST42 LCR Tweezer Test and Comparison Thread
Martin72:
So, tested today.
I can't show the circuit board for obvious reasons, but you can trust me.
I chose an area where a lot of SMD components are "gathered", resistors and capacitors, including a large tantalum with 33µF.
Resistors were tested in RDC mode, which does not allow voltage reduction, neither on the Mastech nor on the Shannon.
Capacitors were tested at 0.5V and 1kHz.
Of 10 resistors tested, the ST42 was able to measure 9 correctly, as was the Mastech.
Of 10 capacitors tested, the ST42 could only measure 2 correctly, the Mastech only one.
This is rather sobering when you consider that the measurement in circuits was emphasized as a point.
However, I personally did not expect anything else.
I will draw my conclusions next weekend.
KungFuJosh:
2:1 is still a win. 😉
Which mode did you test the capacitors in?
Martin72:
Cs, 1kHz, 0.5V .
KungFuJosh:
Was there any indication that trying Cp would help at all?
Martin72:
I can repeat this with Cp, the problem of measuring in circuits remains the same.
For example, you have a filter capacitor at the supply voltage of the circuit and a support capacitor with a smaller value directly at a component supplied with it.
And you now want to measure this capacitor, but it is in parallel with the large filter capacitor.
What do you measure then, right, both.
That's why I wrote that I wasn't surprised by the result.
I would have been surprised if the ST42 had been able to measure a 100nF capacitor that was in parallel with a 10µF capacitor via a detour.
This simply does not work in principle and is not a technical fault.
However, you should then rethink your application for the device according to the realities and possibly leave it alone.
That's why my overall conclusion about the ST42 will be positive.
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