Products > Test Equipment
AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
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ceut:
Hello,
I has been a long time since I have been here  :P

So I've bought an AN8008 (15€) and 2x UT210E (2x 24€) from banggood (which I like very much).
I've received my AN8008 yesterday and I have a calibration problem with it on the V DC (about 0.1V over).
I have tried with the calibration process without success: it's impossible to have something stable from a 500mV source.
So I have extract my 24C02A with my CH341A and only 3 wires, and I have put some jumpers to switch between program mode(CH341A) and read mode(DM1106EN mode), it works very well:




I have changed some options like adding Temperature in °C (only),  changing backlight time and power saving time, and it seems that calibrate with changing manually values works, but a little long to do.

I would like to disable annoying beep sound when changing mode, and slow down a little the display refresh because it seems that it updates too fast and then slowly stabilize the mesured value.

Also I find that the buzzer has a fixed delay which is too long and slow down the bip-mode + add some lag; I can't find if this delay is created by a capacitor or by the DM1106EN  (EEPROM?)

And I don't understand why there is a 9.99MOhms limit (whereas the AN8002 has 60MOhms), so I can't check my other DMM input impendance with this one  :-DD

Last thing is about the mA mode, why it lacks a range ?

I will continue to follow this topic, thanks for all informations in it !   8)

Hoping that someone will post the DM1106 datasheet in english  :-+
stj:
i see eneloops - did you try alkaline batteries?
i dont think the meter works properly at 2.4v
ceut:

--- Quote from: stj on September 06, 2017, 10:50:42 am ---i see eneloops - did you try alkaline batteries?
i dont think the meter works properly at 2.4v

--- End quote ---

Hello,
Yes, after unboxing, I have put 2 fresh alkaline batteries and I have had this little calibration problem on V-DC.
Since, I use Eneloop to do the testing and flashing of the 24C02A, and I have the same calibration problem.
I try to correct this by changing values on the 22&23H adresses: it works but not easy.

Edit: After many mod tries on the 22&23 adresses, I have a good calibration now on VDC (my actual values are 22H= FF 23H=80 , original values were 8D and 81 so a little too high in mesurement).
mnementh:

--- Quote from: bitseeker on September 06, 2017, 05:26:08 am ---
--- Quote from: mnementh on September 06, 2017, 12:09:51 am ---I couldn't help m'self... I had to get myself a shiny red spaghetti meter [...] I picked the "No Rush" option and got $5 to spend in Amazon Pantry... probably get me some BBQ spices or somesuch.

--- End quote ---

Spaghetti meter, but no pasta? No spaghetti sauce? Missed opportunity. :-DD

--- End quote ---

*Puts on best deadpan* They don't carry my brand.  :bullshit:


mnem
I put BBQ spices in my spaghetti. Doesn't everybody?

rdl:
I'm running mine on a couple of older Energizer NiMH batteries (non-eneloop type). Every measurement comparison I made to my Fluke 87-III was spot on. It wasn't exhaustive testing, just spot checks here and there, but it does seem to work okay with that type of battery.
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