some translation from the russian documentation...
Setting.
First Time - check for +5 V and after 78L05
-5V (4.7V) Output DA4.
By choosing R31 achieve normal contrast on the display.
A little about the buttons:
Enabling device while holding down the Set button turns it into install mode
correction factors. There are only three
- Channel 1 Ohm, 10 Ohm and capacity. Change
factors + and - buttons, record in the EEPROM and bust -
same button Set.
There is also a debug mode - this mode to
indicator displays the measured values without treatment -
to capacity - the state of the timer (about 15 samples per 1 uF)
and both channels measure ESR (1 step ADC = 5V/1024).
transition in debug mode - Pressing the "+"
And one more thing - zero adjustment.
This is closable entrance, press and hold button "+"
and through R4 are making the minimum reading (but not zero!)
simultaneously on both channels. Without releasing the "+" button, click
Set - the indicator will display a message on the Conservation of U0 in the EEPROM.
Next, measure the resistance of 1 ohm model (or less), 10 ohms
and capacity (you trust), we determine the correction factors.
can turn, turn while holding down the Set button and set the
to-you, respectively, the results of the measurements.
more here :
**broken link removed**