Hi,
here is my Victor 88C DMM teardown.
Specs:
http://www.china-victor.com/english/en/product_data.aspx?ClassID=168&ID=303the price on Ebay and Aliexpress is about $50, but as far as i know the actual price is about $35.
EbayAliExpressif you dig enough. you can find as cheap as $35
note that this unit is used for 2 years and it's not new.
unfortunately i don't have any more accurate source to check the accuracy.
here is the DMM:
excuse my messy desk
back:
it has Inductance,Capacitance,Resistance,Voltage,Ampere,Temperature and Frequency meter. also the useless hfe...
3.5 digit display with backlight on:
it uses a single 9V battery:
it's possible to replace the battery with removing single screw.
4 self tapper screws and ... we are in
back cover is shielded
dual U channel slot
Hand soldered ?
undo 4 screws around the LCD and lift the board ...
two board construction
20A ceramic fuse for Amp range and a 400ma Poly Fuse for mA range.
single piece input jack
Input protection circuit
squeezed transistor
6 calibration pot.... meh...
LM358 TL072C HEF4066BTHEF4093BT TL062CNothing interesting under second PCB
except.... another squeezed transistor..
LCD is connected to the board with 4 screws and a zebra strip. LCD backlight is directly soldered. but it's possible to flip it gently . ..... 3 more trim pot.....
and of course .... chip on board...(
AME7106 ?)
TL062C *2 and
74HC14Dmore resolution:
http://imgur.com/a/ZmAToend.
(sorry for my english
)
it's not a bad meter for the price... especially inductance meter come in handy sometimes.
hope you enjoyed it