PowerTap Pro - Manual (Page 32)

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TROUBLESHOOTING
5 - Cadence test. (Note the C icon is displayed.)
The top line display shows crank cadence sensor RPM. The middle line flashes "88" with each pulse from cadence sensor. The bottom display shows cadence RPM
value from the hub.
6- Torque information. (Note the T icon is displayed.)
This displays information about the internal workings of the torque readings. The bottom display is the offset torque value directly sent by the hub torque with no cor-
rection applied. The hub sends a value of approximately 512 as the zero point. The middle line display is the correction-offset value currently stored in the CPU. This
is the value that is changed when you do a manual zeroing of the torque. The top display is the corrected actual torque (the bottom value minus the middle value).
7 - Standard test file.
This mode writes a small test file to the memory. Press the Select button and the bottom lines says "run" and then "yes" when the file is written. This file can then be
downloaded.
8 - Communication loop back test.
When looking at the frontside of the CPU, use a coin or paper clip to short out the two pins on the left side. Then press the Select button. The bottom line will say "run"
and then "yes" if it passes the test correctly. If the pins are not shorted together or there was a problem, the display will say "no". This test can be repeated by press-
ing the Select button.
9 - Fast Memory test.
This does a quick test of the memory in the CPU. Press Select and it displays "run" on the bottom line. When the test is completed and it passes, it says "yes". If the
test should fail, the bottom line will say "no".