OWON XDM3051 First Impression 

Hey man. I usually match the size with a noctua fan and a buck converter if need be. Noctua really are very quiet.

@@jstro-hobbytech Thank you for the information - I had not heard of this brand before. The bearing configuration they use is interesting. David

The 3478A is a good meter although I never really liked the display on it.

@@JerryWalker001 True, those 7+ segments are odd and need good lighting. Was only $50 so I'll keep her running.

What's the latest firmware version? Strangely, there aren't any firmware updates available for download on their website.

My XDM3051 has issues when measuring VAC and frequency simultaneously in dual mode. Measurements were not reliable and even became erratic, even at low speed. I seems the internal processing power was insufficient for dual mode. In single mode everything was fine. I wrote them an email, too, stating serial number , firmware version etc. . Received no answer. I am not happy with the purchase as dual VAC und F measurements are by far so most important measurements for me. Also, in dual mode it is not possible to store both measurements to USB stick. Only the primary value can be stored which seems such an unnecessary limitation. Their website does not offer firmware for download. At least not for the XDM3051 the last time I checked. So it seems you were very lucky.

I have to correct myself. It was an XDM3041, not XDM3051.

That is why I initially called it the 'graph function' :)

yes,, can

Absolutely. I have a number of these and while they do not have the features or precision of much more expensive units they are certainly ideal (in my opinion) as a high end hobby unit. Please note that I do not have any affiliation with OWON.

@@JerryWalker001 Also considering a used in good condition Agilent 34401A. They are similar in price. Would you go new?

Meaning the OWon.

@@user-hh4ly2xy6s I rarely buy used multimeters as they are generally being sold for a reason but if you are certain it is in good condition or may need repair then it is personal preference. The HP is most likely to be a better overall meter if it works.

It is not actually as loud as it sounds in the video. The camera mic auto gain turns up the level when there are no other sounds so it always makes it sound like background noises are louder than they really are but the fan in the SMU is relatively noisy.

@@JerryWalker001 I have this multimeter as well as the ODP6033 power supply. The multimeter fan is louder than the power supply unless it's got a substantial load on it. I look forward to your remedy, I've been too lazy to investigate.

@@rogerknapman1260 Yes I totally agree. The fan on both my supplies is are not as loud as the multimeter unless I load up the supplies. I have not yet looked inside the meter so I am interested to see why the fan is needed considering how little power it uses.