Products > Test Equipment
Rigol DM3068 Calibration
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J-R:
I'm surprised this question hasn't come up before.  It looks like this DMM has been out for well over a decade: https://www.eevblog.com/forum/testgear/video-review-rigol-dm3068-6-5-digit-digital-multimeter/
coromonadalix:
34401a 34410a 34411a  would have been better ....
Keithley 2xxx series ...

some Keysight to avoid because of the failing spear mcu
slugrustle:
I'm in a bit of a unique situation in that I have a lab setup with my own equipment, but I use it for work as well as hobby stuff.  Work agreed to calibrate the critical pieces of gear that I use for testing.  So the failed cal report is just what came back this calibration cycle from my employer and whoever they used didn't say a thing about adjustment.

I naively assumed that Rigol, who makes 6.5 digit meters and told me they could repair the unit, would at least do a cal on their end and send a certificate equivalent to the one that originally came with the meter (no numbers, just a pass/fail result).

I have two other of these units that have always passed cal at work and that are older.  I got the first one when starting out because of the perceived value for money.  The next two were in order to keep the same SCPI command language across meters for consistency.  In hindsight, this was a mistake.  Live and learn.
bdunham7:

--- Quote from: slugrustle on February 06, 2024, 11:06:23 pm ---I'm in a bit of a unique situation in that I have a lab setup with my own equipment, but I use it for work as well as hobby stuff.  Work agreed to calibrate the critical pieces of gear that I use for testing.  So the failed cal report is just what came back this calibration cycle from my employer and whoever they used didn't say a thing about adjustment.

I naively assumed that Rigol, who makes 6.5 digit meters and told me they could repair the unit, would at least do a cal on their end and send a certificate equivalent to the one that originally came with the meter (no numbers, just a pass/fail result).

--- End quote ---

OK, now I understand your predicament.  The first time I sent something to Fluke for repair (under the lifetime warranty) I was surprised that they offered not only a free calibration certificate, but your choice of standard, Z540 w/data or ISO17025--at no cost.  That seemed generous for a 10+ year old meter that didn't come with a cal certficate in the first place.  Then I realized--as you have here--that issuing whatever cal cert that the customer needs or requests is just a necessary part of the warranty service in order to avoid disrupting the customer's business.  They just assume that the majority of their customers have their instruments on a calibration program and any repair or failure interrupts that.  I'd have to guess that the majority of Rigol's customers are NOT on a calibration program. 
slugrustle:
The story gets better.

The after-sale technical support engineer at Rigol is a really nice guy and helpful.  After I admittedly gave him the riot act about the lack of a calibration following a main board replacement on the meter, he went above and beyond and said he could get me a calibration certificate for the meter, but I had to wait because of the spring festival holiday going on in China at the time.

I just got the calibration certificate, and the PDF is not worth the paper that it isn't printed on.
1. It is dated 2024-01-29, one day before I was given notice that the repaired meter was being shipped back to me.  I highly doubt that Rigol overnight shipped, from China, a mainboard that had just been calibrated the day before.
2. The calibration certificate bears the serial number of the out-of-calibration meter that I sent in for repair and not the serial number that the meter now displays via its utility menu.

You can't make this stuff up (the story, I mean, not the certificate).  I'm honestly too amused at this point to be mad.

Rigol is not professional equipment, and I should have known better.
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