Press select to exit this mode. When on the testing screen (shows current counts), keep turning the
encoder several times. It is important to turn the encoder as smoothly as possible in the same direction.
If the Z changes state going the opposite direction, an error may show up. It is a good idea to test again
to confirm the error. Also, it is a good idea to re-run the test in the opposite direction.
The polarity of Z show the first change in state for the Z signal. If the Z is normally low, it will
pulse high and show an “H” there.
The errors that can show in this mode are:
COUNT – This means the counts per revolution was not consistent from the last index pulse
(Underflow). The number of counts in error will show on the bottom line.
OVERFLOW – Similar to COUNT, but the counts per revolution was over the initial count. The
number of counts and the initial count will show on the bottom line.
A POLARITY – During testing the encoder, the A+ and A- had the same value. They should always be
the opposite value. This can show up also when a single ended encoder is tested without selecting the
single ended option.
B POLARITY – During testing the encoder, the B+ and B- had the same value. They should always be
the opposite value. This can show up also when a single ended encoder is tested without selecting the
single ended option.
Z POLARITY – During testing the encoder, the Z+ and Z- had the same value. They should always be
