Products > Test Equipment
AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
Gandalf_Sr:
Ahh, so those little 12 volt batteries are just 8 LR44 button cells in a plastic tube eh? My cottage garage door openers use those and they are expensive, I can buy 10 LR44s shipped from China for <$1 so it seems that buying those and adding some heatshrink might make for a cheapskate replacement.
Fungus:
--- Quote from: Gandalf_Sr on July 16, 2017, 10:47:55 am ---Ahh, so those little 12 volt batteries are just 8 LR44 button cells in a plastic tube eh?
--- End quote ---
Something like LR44s. Check actual size before ordering.
--- Quote from: Gandalf_Sr on July 16, 2017, 10:47:55 am ---My cottage garage door openers use those and they are expensive, I can buy 10 LR44s shipped from China for <$1 buying those and adding some heatshrink might make for a cheapskate replacement.
--- End quote ---
Yep.
Mark Hennessy:
--- Quote from: alm on July 16, 2017, 09:56:00 am ---
--- Quote from: Mark Hennessy on July 16, 2017, 09:39:03 am ---On uA AC, mine was spot-on when compared with a Fluke 87V. Really, no more than 2 or 3 counts away in both ranges, right down to the smallest signals. That impressed me, to be honest.
--- End quote ---
I am pretty sure that the Fluke 87V has also its AC specs only apply for more than 10% of range or something like that. So I would not trust the 87V measurements at the bottom of its range either. It may just be that both are similarly off :P. The only way to compare is to measure something that is near full scale on the 87V, but near the bottom of a scale on the AN8008.
--- End quote ---
Yes:
--- Quote ---AC conversions for Model 87 are ac coupled, true rms responding, and valid from 3 % to 100 % of range, except 400 mA range (5 %
to 100 % of range) and 10 A range (15 % to 100 % or range).
--- End quote ---
Most of my spot-checks on the uA ranges were not at the bottom 3% of the range, but those that were were fine. Fluke's specifications are very conservative :-+
I've just double-checked with a 187 added to the series chain, which has a tighter spec, along with the BM235 (just out of interest); all good :-+
Still, I suppose that if you can measure AC millivolts well, it's not much of a leap to get to uA ;)
tautech:
--- Quote from: Gandalf_Sr on July 16, 2017, 10:47:55 am ---Ahh, so those little 12 volt batteries are just 8 LR44 button cells in a plastic tube eh? My cottage garage door openers use those and they are expensive, I can buy 10 LR44s shipped from China for <$1 so it seems that buying those and adding some heatshrink might make for a cheapskate replacement.
--- End quote ---
They're smaller than a stack of LR44's and there's a couple of common 12V sizes, the most common being:
23A 8 x 28mm
27A 10.3 × 28.5mm
https://en.wikipedia.org/wiki/List_of_battery_sizes
Gandalf_Sr:
--- Quote from: tautech on July 16, 2017, 12:32:00 pm ---They're smaller than a stack of LR44's and there's a couple of common 12V sizes, the most common being:
23A 8 x 28mm
27A 10.3 × 28.5mm
https://en.wikipedia.org/wiki/List_of_battery_sizes
--- End quote ---
Thanks, glad I read this before ordering a container full of LR44s on a slow boat from China :D
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