Products > Test Equipment
AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
JXL:
--- Quote from: MacMeter on August 01, 2017, 07:11:44 pm ---I ordered one on Amazon, knowing it would be slow from China. But this was a 1st for me, kind of a time buying scam, I assume they lied about it being in stock. I'm pasting the sellers response when after tracking the package from China, I received a tiny envelope with a "free" shrink wrap sleeve for a remote control, worth about 10 cents. Along with a business card saying the real package would still be coming. I then put in for a refund, and Amazon lets the seller contact me via email. See if this response is logical!
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I ordered mine from eBay and got the same shrink wrap sleeve and a similar message. My guess is that they are collecting orders so they can do their volume buy to get volume discounts. Anyway, I only bought the meter out of curiosity and to reduce wear and tear on my "better" meters.
RedSky:
As far as the AN8008 readings around µV are concerned...
I have a Uni-T UT70D (80,000 count) and a Brymen 867s (up to 500,000 count) both can read down to a resolution of 1 µV
Both have trouble at around the 0 mark at either staying on 0 when leads are shorted or reading accurately in the -10 to +10 µV range, no matter the source of the measurement. When the reading goes up substantially they read very close to one another.
Someone will probably get their Brymen out now and try it and it will show a perfect 0 when leads are shorted and yes that happens to me a fair amount but not always, sometimes it might just count up or down very slowly as well or show an off 0 measurement. Both meters do the same thing and they use different chipsets.
Basically if two several hundred dollar meters have trouble at near 0 µV this AN8008 is still doing very well.. Not that i have mine yet, ordered a month ago now, still waiting doh!
As others have already noted, it's probably either the averaging algorithm used or an attempt to hide some noise near zero in firmware. Virtually no chance this thing has a 13+bit ADC in it... yet it's trying to do 10,000 resolution has to be a fair amount of averaging going on.
amspire:
It sounds like many multimeter customers want the meter to read 0.000mV if the leads are shorted. The manufacturers do not want to have to explain offset voltages and thermal voltages to complaining customers I guess.
It would be great if there is a way to turn this dead zone off.
plazma:
I added RANGE and REL buttons to my AN8002. Let see if button modification is possible with the AN8008.
tronde:
--- Quote from: plazma on August 02, 2017, 01:04:02 pm ---I added RANGE and REL buttons to my AN8002. Let see if button modification is possible with the AN8008.
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What kind of switches have used? Isn't the rubber buttons to soft for normal push buttons?
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