Products > Test Equipment
Why some brands don't do LCR meters?
TimFox:
Yes, there are limits to specified accuracy, just like any other measurement device.
Note that the DE-5000 costs roughly $140 US.
You can obviously obtain higher accuracy for more money.
I tried to link to the Specifications tab, but the result linked to the overall page with access to the Specifications tab, from which I excerpted some values and suggested that the interested reader look at the full specifications.
Before I retired, I used a QuadTech (now IET) 1920 LCR meter at work, which has better specifications and higher test frequencies (0.1% accuracy at sweet-spot settings, 1 MHz max frequency).
The current price is roughly $5500 (depending on options) https://www.ietlabs.com/1900-lcr-meter.html
KungFuJosh:
--- Quote from: TimFox on December 05, 2023, 06:22:53 pm ---Yes, there are limits to specified accuracy, just like any other measurement device.
--- End quote ---
Right. That was my point; better accuracy and general usefulness requires a broader frequency range, and costs more. The DE-5000 is very limited, but also very good for its price.
alm:
--- Quote from: KungFuJosh on December 05, 2023, 06:36:11 pm ---better accuracy and general usefulness requires a broader frequency range, and costs more
--- End quote ---
Why do you think accuracy and frequency range are linked? Counter point: the GR 1620 bridge with extremely high accuracy but a very limited frequency range. Best accuracy is achieved at 1 kHz.
I won't argue that a wider frequency range is more versatile, but for ultimate accuracy a 1 kHz-only bridge might be better.
Kosmic:
--- Quote from: KungFuJosh on December 05, 2023, 06:36:11 pm ---
--- Quote from: TimFox on December 05, 2023, 06:22:53 pm ---Yes, there are limits to specified accuracy, just like any other measurement device.
--- End quote ---
Right. That was my point; better accuracy and general usefulness requires a broader frequency range, and costs more. The DE-5000 is very limited, but also very good for its price.
--- End quote ---
Is there really a link between frequency range and accuracy ?
This is the accuracy of the R&S LCX pdenisowski linked just above:
at 10KHz you are already at 0.1% and 10MHz you are at 1%.
I think they are just better instruments thus more expensive. And more expensive instrument have more features like extended frequency range.
KungFuJosh:
--- Quote from: alm on December 05, 2023, 07:21:41 pm ---
--- Quote from: KungFuJosh on December 05, 2023, 06:36:11 pm ---better accuracy and general usefulness requires a broader frequency range, and costs more
--- End quote ---
Why do you think accuracy and frequency range are linked? Counter point: the GR 1620 bridge with extremely high accuracy but a very limited frequency range. Best accuracy is achieved at 1 kHz.
--- End quote ---
Your counterpoint isn't a counterpoint, it is my point. I'm talking about accuracy across a broader range of component values, not specifically high accuracy within a limited range of values. All meters have a higher accuracy in a specific frequency range.
--- Quote from: Kosmic on December 05, 2023, 07:25:31 pm ---
--- Quote from: KungFuJosh on December 05, 2023, 06:36:11 pm ---
--- Quote from: TimFox on December 05, 2023, 06:22:53 pm ---Yes, there are limits to specified accuracy, just like any other measurement device.
--- End quote ---
Right. That was my point; better accuracy and general usefulness requires a broader frequency range, and costs more. The DE-5000 is very limited, but also very good for its price.
--- End quote ---
Is there really a link between frequency range and accuracy ?
This is the accuracy of the R&S LCX pdenisowski linked just above:
at 10KHz you are already at 0.1% and 10MHz you are at 1%.
I think they are just better instruments thus more expensive. And more expensive instrument have more features like extended frequency range.
--- End quote ---
You're ignoring component value, and focusing only on the frequency. Any component value that falls outside of those ideal boxed ranges is questionable at best. By that chart, even the 10MHz upgrade ($20k), is mediocre accuracy to measure 100pH. I'm not aware of there being a 20MHz upgrade for that range, but that would be required to measure that.
Compare it with Instek's 8200 series accuracy chart:
Accuracy still drops off, but the ability to test AT ALL is better than nothing.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version