Prokit's Industries NT-6560 - Manual (Page 8)

FUNCTIONS
Addition / subtraction
Distance measuring.
The next measurement is added to the previous one, then press
the second measured value is shown and the result is shown
automatically.
The next measurement is subtracted from the previous one. Then
press the result is always shown in the summary line with the
previous value in the second line.
The last step is canceled.
Area
Press once. The symbol appears in the display.
Press button to take the first length measurement (e.g. length).
Press again to take the second length measurement (e.g. width).
After taking the second measurement, the area/surface is automatically
calculated and displayed in the summary line. The last individual
measured value is indicated at the second line in the display.
Volume
For volume measurements, push button twice until the
indicator for volume measurement appears in the display.
Afterwards, Press this button to measure the length,
Press this button for width
Press button to take the height,
After taking the third measurement, the volume is automatically
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