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Rigol DP832 - Firmware list and bugs

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Armxnian:
Here is an example. CH2 set at 2.000V, and SDM3055 showing a dead on 2V, but the readout is 4mV more. So the readout is not always more accurate than the set voltage. The dmm accuracy (.015%) is negligible for this specific measurement and it was calibrated only a month ago. The readout is however within spec.
     

Guni:
Everything is ok. Check the specification of DP832.
Power supply is not a high accuracy voltmeter  :)

broderp:

--- Quote from: Guni on April 23, 2015, 10:16:31 pm ---Everything is ok. Check the specification of DP832.
Power supply is not a high accuracy voltmeter  :)

--- End quote ---

My humble opinion would agree with this.  If the circuit I design or am working on is so sensitive that 4mV is a problem, then I'm doing something wrong.. ::)

Armxnian:
Yup everything is indeed in spec. As mentioned, I originally thought it was a software bug (and the read back was bang on) since everything read 4mV higher. Today for example, with the channel on and set to 0V, I read 2 to 3mV instead of 4mV. A feedback loop as another member mentioned could have helped, but you would need more accurate components anyway for such a circuit. It's just weird setting 2V, actually getting 2V out, but the PSU telling you its a little above 2V when its not, making you fine tune it, when in reality you are drifting away. Of course this is not the case on all voltage ranges, and what you set is not what you get, so the read out is just another reference.

H.O:
Geez, I can't believe the things some of you guys worry about - just sayin'  8)
It's a power supply, and a pretty good one for what we're paying for it, not a precision voltage reference.


--- Quote ---So the readout is not always more accurate than the set voltage
--- End quote ---
They don't claim it to be. Actually the set voltage has a tighter specification than the readback voltage. <---EDIT: No it doesn't.

It's just a matter of time before someone says they're sending the unit back because the warranty seal sticker wasn't put on at exactly straight.

Said with tounge- in-cheak....mostly  ;)

EDIT: Nope, I got the programming vs readout backwards. Readback is 0.05%+10mV, programming is 0.05%+20mV.

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