Products > Test Equipment
Siglent SDM3065X
tautech:
--- Quote from: skander36 on December 06, 2018, 01:15:42 am ---Hi,
Thank you , but how can I use values from Define ?
Everything I choose don't change anything .
Thank you !
--- End quote ---
Not sure.....having trouble to do that too. :-[
From what you say you need ~+5*C correction, that fits well with a #40 or 41 adjustment but it does not seem to be saved. :-//
I'll ask tech support.
eplpwr:
--- Quote from: Kleinstein on May 26, 2018, 08:47:28 pm ---For the accuracy and longer time stability it is very difficult to tell how good the new meters are actually. There is a little more trust in the way Keysight or Keithley calculate the specs, but time will tell. Just measuring a few new meters against a more or less accurate source does not give much information. The old established companies have there experience with older models. At least the LM399 is about the same for all.
--- End quote ---
Yes and no. LM399 is the same for sure. What you get from the big names are burned-in and binned '399s. Also note that many brands have 10V range as opposed to Siglents 20V. This is great except that part of the accuracy spec is % of range.
My SDM3065 was spot on day 1, then drifted exactly as LM399 datasheet predicts. Buy the meter, you do the burn-in.
DaJMasta:
I've gotta say, while the Siglent offers very good price/performance.... I've got a 34461A and I really like the meter. The two are very similar in look and form factor, and the specifications are around about the same, but the price premium for the Keysight is not so crazy either, and they can be found (at least in the US) for only $100 more or so used in good condition. It may be worth seeing some videos of each in action to verify UI responsiveness and such to get a feel for the differences between them. The minor advantage of the Keysight is that the lowest range has half the scale (100mV DC vs. 200mV DC and comparable across the ranges), whereas the Siglent has a faster rated frequency measurement, though I just clocked my 34461A reading a 820kHz 1Vpp sine wave, so maybe not by as much as it appears.
Either meter is probably a good choice, but see if you can see the Siglent in action or use it yourself, could help make your choice or differentiate otherwise similarly specified instruments.
Performa01:
--- Quote from: DaJMasta on December 06, 2018, 09:27:19 pm ---The minor advantage of the Keysight is that the lowest range has half the scale (100mV DC vs. 200mV DC and comparable across the ranges)
--- End quote ---
How could this be an advantage?
What counts is resolution and dynamic range.
The resolution is the same 100nV per count on both meters. But the Siglent can provide this resolution up to 219.9999mV because it has nearly twice the dynamic range, whereas the Keysight falls back to 1µV above 119.9999mV.
I own neither of them, but prefer my Fluke 8842As (5-1/2 digits) and Keithly 2001s (7-1/2 digits) over my other DMMs for this exact reason. The higher dynamic range also means high impedance up to at least 20V, whereas the 6-1/2 digit DMMs with only 1.2 million counts (like the Keithley 2015THD) tend to already show a noticable non-linear increase in input current once entering their overrange, i.e. above 10V.
For old style analog precision work in +/-15 to +/-18V systems, found in many calibrators, the high impedance 20V range with good resolution (1µV in case of the Keithley 2001) is just indispensable.
skander36:
--- Quote from: DaJMasta on December 06, 2018, 09:27:19 pm ---I've gotta say, while the Siglent offers very good price/performance.... I've got a 34461A and I really like the meter. The two are very similar in look and form factor, and the specifications are around about the same, but the price premium for the Keysight is not so crazy either, and they can be found (at least in the US) for only $100 more or so used in good condition.
--- End quote ---
Used Keysight , Fluke , or Keysight may be a good choice in US , but in Europe they are very rare and at a high price . Import from USA is not an option and you must add 100-200E for calibration , because there is no means to use this precision device without being calibrated. So for me a good source for meters and scopes are clearance from Rigol or Siglent .
(I've got the SDM3065X from a Batterfly promotion at 585 E -no VAT ).
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