PowerTap SL - Manual (Page 29)

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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 correction 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 manu-
al 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 front side 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 pass-
es 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 pressing 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 bot-
tom line. When the test is completed and it passes, it says "yes". If the test should fail, the bottom
line will say "no".
T TE ES ST T M MO OD DE E