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| New Siglent SDS1104X calibrated date 17 months old - Is this acceptable? |
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| kaytemp:
Equipment will be out of calibration within 1 month of purchase date. Noobie hobbyist just purchased my first ever test equipment from Amazon, Received today Feb 21, 2023 the following: Siglent SDS1104X-E Oscilloscope, calibrated date Sept 16, 2021 Siglent SDG1032X Waveform Generator, Calibrated Date May 26, 2022 Siglent SPD3303X-E Power Supply, calibrated date May 31, 2022. The Certificate of Calibration states to allow 180 days after the calibrated date + the calibration interval to schedule the next calibration date. So for the Scope, ~March 16 2023 - less than a month from the day I received it. Although I have virtually no experience with any of this, it doesn't feel right for a piece of equipment to be out of calibration so close to when I get it. I would think purchasing from the Siglent Store on Amazon would be fresh stock with a fairly recent calibrated date. Is more than year old calibrated date typical? Would you question this? Noob trying to learn. Thanks. |
| ken830:
That's direct from Siglent? Doesn't seem right. I just received a brand new Rigol MSO5072 and the calibration certificate says it was calibrated in early 2019! Saelig agreed to RMA it, but I have to wait who-knows-how-long for them to get a replacement. Strange. |
| TomKatt:
My unprofessional hobbyist opinion wonders how much that really matters? On the surface it does seem like unusually "stale" inventory for a rather popular product, and Amazon surely sells quite a few of these in the US. But still, would this really affect the accuracy or calibration of the gear? I think not. And as a hobbyist, you have no real need to qualify your measurements against a known standard. Plus, even if it were calibrated last week, not many service companies are going to offer calibration service for such low end consumer models (and even if they did, the cost would likely approach or perhaps even exceed the scope itself). Most test gear in this range is likely to never see a calibration certification outside the one that comes with it. Personally, I think the most important thing is that the warranty is applicable. I suspect you are more likely to request some kind of warranty support over any potential calibration support issue. I agree it seems a little disappointing, but I'm not sure I would go through the hassle of trying to get a replacement. But that's just myself. |
| Fungus:
"Calibration" doesn't mean much on an oscilloscope because you're supposed to constantly recalibrate it yourself, it has a button for it. You're supposed to calibrate it to the temperature of your room before any important reading, or if the temperature changes by more than 3 degrees. In some workshops that could mean calibrating it morning/afternoon every day when the sun comes around. All the certificate shows is that the "self-cal" button worked within spec at the factory. Think of it as a little gold "QC" sticker. |
| bdunham7:
In terms of performance, it almost certainly doesn't matter at all. Warm it up for an hour, run the self-cal and you're good. OTOH, if they are going to ship all of these with calibration certificates for those who need/want them, then it seems to me that they need to make sure that they get delivered before the 180-day grace period. After all, if it is supposed to be included in the price, then you didn't get all of what you paid for regardless of whether you need it or not. This is why some test equipment is sold either with or without a calibration certificate according to the customer's needs and at slightly different prices. I think somebody owes you a fresh calibration certificate if you want one. |
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