This display shows voltage and current on the top line using a medium font.
The second line shows power and ohms (the equivalent load resistance).
The third line shows watt hours, temperature, and amp hours.
The last line is a timer
(that only counts while powering a load for calculating time dependent values) and test group number.
Click once to go to screen #2.
On the first line, the voltage of the negative power line is shown (isn't this always zero?)
followed by USB protocol in effect and the equivalent resistance of the load.
The next two lines show the data line voltages and the bottom line is the voltage of the positive power line.
Click once to go to screen #3.
This display is mostly in Chinese which is the same data as screen #4.
This screen is self explanatory.
Large fonts without time.
This screen graphs voltage and current with the color and range of voltage on the left with current on the right.
Time resolution ranges from 0.5 to 5 seconds and is selected by long pressing.
The variance of voltage and current is shown center on the bottom line.
This screen is also a graph similar to #6 except the data lines are shown.
The vertical scale is from 0 to 5 volts.
I'm not sure what the two lower center voltages show but they always seem to be 1.0V.
Time resolution operates the same as screen #6.
System Settings:
Long press to enter this function. Step thru the parameters by clicking once.
When the desired parameter is highlighted, perform a long press until the highlighted parameter starts flashing.
Clicking once decrements the parameter. Long pressing while highlighted quickly lowers the value.
Double clicking increments the value. After incrementing the value, long pressing will quickly raise the value.
Single click to go back lowering the value. After a few seconds of not clicking,
the displayed value is saved and the tester shows "OK".
eight system parameters
Over Voltage Protection (OVP) (supposedly it beeps when over this value)
Lower Voltage Protection (LVP)
Over Current Protection (OCP) (I think it shuts down and must be reset)
Screen Rotation with long press (flips display 180°)
Default Set with long press (return to factory default values)
Clear Data with long press (clears all data in all test groups)
Standby Style screen after timeout (either original or volts, amps, watts are displayed)
Capacity Ratio (I guess it calculates power bank capacity as percentage)
Exit now with long press instead of waiting for timeout
This display starts a countdown timer to turn the display off.
Click once to advance to the first display screen before the countdown finishes and turns off the display.
To re-enable the display, long press which brings up reference settings.
Voltage and current are displayed and I guess can be modified to calibrate these values
and I'm not sure how this works but my tester seems fairly accurate as shipped.
