Cycle Analyst V3.1 User Manual
Rev 1.0
9 Common Mistakes
The Cycle Analyst is pretty rugged and (we like to think) pretty self-explanatory.
But there are several user errors that have come up more often than others and it
is best to bring attention to these common mistakes upfront.
1. Connecting throttle to controller and not the CA3: If the throttle is left
plugged into the controller, then the CA's throttle output will be at the
minimum output and will over-ride the connected throttle. This results in no
power or very little power when the throttle is turned.
2. Hooking up a PAS sensor not able to handle 10V: The power on the 5-
pin PAS plug is 10V in order to be compatible with torque sensor models.
The Grin supplied PAS sensors have all been modified to handle 10V
power, but most third party PAS sensors can't. Hooking them up without
adding an inline 5V regulator will typically fry the PAS sensor. It can also
damage the CA too, if while failing it draws excessive current from the 10V
power bus.
3. Connecting a programming header to PAS plug: Certain models of 3
rd
party motor controller use a 5-pin JST plug for controller programming, and
when this is mistakenly plugged into a Cycle Analyst PAS plug it shorts out
the 10V bus and damages the CA similar to item 2.
4. Using a torque sensor on a high voltage system: Even though the CA
on its own can handle up to 150V, this voltage needs to be derated when
accessories are plugged in which draw significant current. Most torque
sensors consume at least 20mA from the CA's 10V power bus, and that
usually correlates to no more than 52V nominal battery packs. A torque
sensor can be used with a high voltage ebike system if the power for the
torque sensor is supplied externally and not through the 10V on the PAS
plug.
5. Not reading the web page, manual, software tooltips, or our YouTube
videos and making a bunch of random ill-informed changes: Yeah,
this happens pretty often too. Luckily in the V3.1 firmware it's possible to
restore all settings back to factory defaults in the Miscellaneous setup
menu. Choose Misc->Defaults and then select Restore.
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