the opposite value. This can show up also when a single ended encoder is tested without selecting the
single ended option.
AUTO PHASE:
This mode will check the phase and duty of the A and B signals. The screen will show the
highest and lowest phase and duty of each signal. During this mode, the encoder should be turned at a
fairly slow pace. If the speed is too low or too high, the UEC will not update the screen. An asterisk
will display in the top right if the speed is good. The defaults are for phase 60% high, 40% low. For
duty it is 60% high and 40% low. The high and low thresholds can be set under the options menu. The
readings are only updated when the asterisk is shown. Turning the encoder several times in both
directions is recommended. If the numbers do not change, one or both of the A or B signals may be
missing. Check the duty of the signals to determine which signal is missing. The phase is expressed in
percentage of 180°. 50% would be 90°.
If the screen doesn't update while turning the encoder, the PPR may be set incorrectly. This can be
changed under options, using the DRO mode, or using Auto Count (if there is a Z signal).
The auto phase mode screen is arranged as:
Errors that can show in this mode are:
Phase High – The phase between A and B was greater than the high threshold level.
