Products > Test Equipment
DMMCheck Plus Multimeter Reference(and other References) - Experiences..
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Martin72:
So now it's on, I just ordered the DMM reference with L/C option.... 8)
Should arrive this week.
Voltage, current, frequency, resistance, inductance, capacitance. ,optics, what is in papers with it..... I will then test and report here of course.
Fungus:

--- Quote from: Martin72 on July 04, 2023, 06:25:18 pm ---If you have a cheap meter with lousy specs calibrated, you have official confirmation that the meter is lousy.

--- End quote ---

What if you have a cheap meter with really good specs?

eg. https://lygte-info.dk/review/DMMAnengAN870%20UK.html
Electro Fan:

--- Quote from: Fungus on July 04, 2023, 06:13:00 am ---
--- Quote from: KungFuJosh on July 03, 2023, 03:25:54 pm ---Those random examples are all trash.

--- End quote ---

I've measured mine on various multimeters and it seems legit.

There were quite a few in that thread I linked to that were legit, too.


--- Quote from: Electro Fan on July 04, 2023, 01:13:31 am ---The comments above regarding how accurate they are and continue to be are pretty consistent with my experience.

I bought 3 of their products way back in the day and was/have been happy with all of them (two are marked 2011-12 Rev 1, and one is 2008 R4).

--- End quote ---

The hardware in those devices seems OK, it's the calibration where some sellers are cutting corners.

I'm sure you can get a good one if you take the time to go through all the Aliexpress comments/ratings. I just posted a few random listing to give an idea of prices.

nb. The references in them are probably pulled from old devices. The silver lining is that they'll be well burned-in.  :)

--- End quote ---

Just to clarify/confirm....

When I said:

The comments above regarding how accurate they are and continue to be are pretty consistent with my experience.

I bought 3 of their products way back in the day and was/have been happy with all of them (two are marked 2011-12 Rev 1, and one is 2008 R4).

These ^ are all references to the voltagestandard.com and DMMCheck Plus products.  5V Reference was 2008, PentaRef was 2011, and DMMCheck Plus was 2012.
rhb:

--- Quote from: Fungus on July 04, 2023, 06:51:04 pm ---
--- Quote from: Martin72 on July 04, 2023, 06:25:18 pm ---If you have a cheap meter with lousy specs calibrated, you have official confirmation that the meter is lousy.

--- End quote ---

What if you have a cheap meter with really good specs?

eg. https://lygte-info.dk/review/DMMAnengAN870%20UK.html

--- End quote ---

I tested 8-9 "Free with any purchase"  Harbor Freight DMMs which sell for  $5-6 now.  They were all in spec and I adjusted them all to <0.1% ( the limit of resolution for a 3.5 digit meter).  Unless I'm at my bench with dual 3478As and 34401As, I'm most likely to use one of those.  I'm probably down to 3 or 4 now.  I got them to give away.  Dad and I bought slew of them for $2 on sale before they started giving them away.

I have them in many places and toolboxes.  If needed I have 4.5 digit Tenma bench DMM with an internal battery pack for portable use.  But having a DMM in the dry cell drawer is very handy. 

I feel very confident that anyone buying one of Doug's products  will be very pleased.

Have Fun!
Reg
jchw4:

--- Quote from: Martin72 on July 04, 2023, 06:49:45 pm ---So now it's on, I just ordered the DMM reference with L/C option.... 8)
Should arrive this week.
Voltage, current, frequency, resistance, inductance, capacitance. ,optics, what is in papers with it..... I will then test and report here of course.

--- End quote ---

Could you share your calibration certificate that you receive with it?
I got mine long ago from voltagestandard.com and could not be happier. But after the project was sold to the new owner and since then my experience was not as good as with Doug. I added the LC option and I don't feel strong about it.
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