Products > Test Equipment

Forced Revision DMMCheck Plus

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J-R:
As a test I powered my original DMMCheck Plus with a function gen and threw all kinds of evil at it aaand....nothing really.  Worst I saw was about 5uV on my K2010 depending on the evilness of the waveform on top of the 9V offset.  This isn't much in comparison to the maybe 25uV that I believe the reference is out currently (about 9 months since last cal) and which still far exceeds the spec of 0.007%.

So my opinion is the choice of AC adapter doesn't matter.

rkeller:

--- Quote from: J-R on January 01, 2024, 04:19:03 am ---FYI, direct link to product being discussed: https://dmmcheckplus.com/shop/ols/products/dmm-check-plus-fully-loaded-with-all-options-lc-board-enclosure-and-dual-frequency

Glad to see continued production and improvements.  It makes sense that SMT is far cheaper than through-hole, due to automation and the reduction of materials.

With regard to the new design, of course it's great that the components are underneath and protected and the connections are easier to reach.

--- End quote ---
We provide a 15VDC external supply that is compatible with domestic and international AC line voltages and frequencies.  As an alternative, we have connectors available for customers that prefer to provide their own 15VDC supply, I'll put a link to the connector on our web page.

rkeller:

--- Quote from: TERRA Operative on January 15, 2024, 05:21:28 am ---Hmmm, this looks tempting... :)

Are the capacitance and inductance values measured and noted down like voltage and resistance values as part of the calibration?

--- End quote ---
YES, Those values are noted on the as measured Calibration Certificate.  Our LCR test equipment is at Custom Cal at the moment so (expected return 1/26/2024) so we are two weeks out on orders until it returns.  The new Calibration Certificate will be posted here as soon as it arrives: https://dmmcheckplus.com/technical-information

rkeller:
Hi J-R, you shouldn't notice any difference between shore power (plugged in) and battery power.  The incoming 15Vdc power supply voltage is filtered and regulated on board as well.  As far as we have measured there is no observable change in the reference outputs.  : )

KungFuJosh:
Is the voltage standard only ~5V? I'd love to see a standard that covers multiple ranges including mV.

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