Cycle Analyst V3.0 Operation Instructions


The Cycle Analyst has two modes of operation:

  • User Mode - Provides the rider with electrical drive system information / status.
  • Setup Mode - Allows users to make changes to e-bike programming

When the CA (Cycle Analyst) is turned on, it defaults to the 'User Mode' of operation. While it is not necessary for you to familiarize yourself with the 'Setup Mode', it is necessary for you to become familiar with the basic features of the 'User Mode'.

Basic Navigation

Navigating the Cycle Analyst can feel a little tricky at first, but once you get the hang of it, it's pretty easy. There are two user interface buttons; a 'left button' and a 'right button'. Pressing these buttons toggle left and right (or up and down) through various screens, while pressing & holding the right button selects something (or opens a 2nd tier menu). For the most part, pressing & holding is used in the 'Setup Mode'.

  • Press right/left buttons to navigate to the next/previous status of Setup Screens
  • Press/hold the left button to enter Setup Navigation mode
  • Press/hold the left button to exit Setup Navigation mode
  • Press/hold the right button to reset trip statistics
  • From the 'Min & Max Stats' status screen, press/hold the right button to reset the peak trip statistics

Let's start with a function you'll most likely use every time you re-charge your e-cruiser.

Reset Trip Statistics - To reset the trip statistics, simply press & hold the right button.


Builders Note: Resetting trip statistics is typically only done after you fully charge the battery. While it resets the trip-meter, it also resets the power-units used meter. This is probably the most important piece of information you'll use on your e-bike.
How to read your e-bike's electrical fuel tank?
Most electric bikes have a simple gauge or LED indicator to represent the battery pack's state of charge (SoC). While easy to read and understand, they are not super precise. The CA has this 'graphical gauge' on the top left of the LCD display, but it also has an even more accurate way of displaying exactly how much power is left in the battery. You just need to understand how to read it.
High-end electric vehicles use a super accurate electrical meter that tracks every power unit used (like the meter on the side of your house). While the electrical meter can measure voltage and current flowing past it, it technically can't measure how big your battery is. That said, for the SOC indicator icon to function properly, we have programmed in the size of your battery (@ 14.8Ah).
So if you fully charge your 14.8 Ah battery (represents power-units in your battery tank), every time you press the throttle, you spend power-units (Amp-Hours/Ah). The meter keeps track and displays this data in real time. Once your meter gets to 14.8Ah, you are out of power. The meter counts up to 14.8, not down from 14.8 to zero.
So if you go for a 20 mile ride, and your CA shows you used exactly 8Ah of battery power, you know you have 6.8Ah of battery power left to use. If you turn off the e-bike, that information is saved. When you get back on the bike and turn on the CA, the meter will continue from that point, cumulatively counting Ah and miles traveled.
If you reset the trip statistics without fully charging the battery, not only does the trip-meter reset to zero, but the power meter resets to zero. The reset can fool some riders into thinking they now have 14.8Ah left, when in actuality, only 6.8Ah is left in the battery. That could leave you 'out of power' when you least expect it. Just understand that's how the meter works.


User Mode

Status 'Display Screens'

The CA powers up to the status display screens which may be traversed with short L/R button presses. There are eleven (11) screens, which display information grouped by function. Certain values (e.g. speed, amps) are displayed on more than one screen to give a more comprehensive view of related information without changing screens.

Builder's Note: There are (5) status display screens on your Fat Woody. While there are (11) screens available, many are not applicable to your Fat Woody e-cruiser and have been programmed to be 'hidden'. These screens can be enabled through CA programming, but provide no additional information that riders might find useful.

Before reviewing the status screens, there are a few 'non-numeric' graphics (or glyphs) on the left side of the display that should be explained. The Main Status screen displays the following status information in addition to the numeric values:

  • Battery Gas Gauge: Graphic indicates battery state of charge (SOC) from Full to Empty (top left of display).
  • Temp Alert: When temperature limiting is in effect, the Battery Gas Gauge alternates with a Thermometer alert with 'mercury' showing relative temperature in the range.
  • Operator Throttle Bar: Shows 0-100% of the throttle range (bottom left of display). It also shows an animated e-brake lever graphic when the e-brakes are applied.


State of Charge Indicator

A graphical State of Charge (SoC) icon is located on the upper left side of the LCD display. It features a 'Hot Off Charger' (HOC) pixel at the center top that is set when the battery voltage is greater than 100% of the normal open circuit voltage. This elevated voltage is common, and represents only a small amount of extra usable capacity. Self-discharge will typically reduce battery voltage to normal levels after a period of minutes to days, preventing the HOC pixel from being set.

The remaining pixels show the actual usable 0-100% charge state and are extinguished one by one as the battery discharges.

In addition to the graphical SoC indicator for battery status, users can see exactly how many amp/hours remain in their battery pack on the applicable status screen.


Status Display Screens - Detailed Review

The V3 Cycle Analyst has a total of 11 display screens to scroll through, and as a user you can mask screens that you don't want to show up from the 'Preferences' section of the setup menu. Please note that your Fat Woody has been programmed to hide screens that are not applicable.

Display #1 - Main Screen

The primary display screen shows at a glance all of the key info you would want to see from the bike. There is a battery fuel gauge in the top left, plus a readout of your pack voltage, speed, and battery power draw. The bottom right corner toggles between showing your accumulated trip distance, accumulated battery amp-hours, and motor hub temperature (if enabled).

Meanwhile, on the bottom left there are two additional graphic blocks. A throttle slider icon shows visually where your input throttle is at, switching to flashing mode if throttle auto-cruise is latched, and then to a brake lever if the e-brakes are engaged. Adjacent to this is a human power indicator that works if you have a PAS (pedal assist) sensor enabled, indicating either your human power or your pedal cadence.

Also note that if you exceed the speed limit, then the speed units will flash, and if you hit the battery low voltage cutoff then the voltage sign will flash. If you are below the minimum start speed, then the speed number itself will flash.


Builder's Note: Certain features provided by the CA are not used or enabled on this bike. The CA has been configured for use consistent with the design of the Fat Woody e-cruiser. Auto-cruise, PAS, and minimum start speeds are not used/enabled on your Fat Woody e-cruiser. Turning them on may cause improper and/or undesired operation.
In addition, your Fat Woody e-cruiser has been programmed with some of the following status display screens hidden, but we felt it important that you knew they were there, and what information the provide.


Display #2 - Electrical Only (Hidden on Fat Woody e-Cruiser)

Display Screen #2 - Electrical Only

Display Screen #2 - Electrical Only

The 2nd screen only shows electrical stats: Volts, Watts, Amps, and Amp-Hours. It's useful when using the CA on non-vehicle systems where all the additional details on the first screen are not relevant.


Display #3 - Human Power (Hidden on Fat Woody e-Cruiser)

Display Screen #3 - Human Power

Display Screen #3 - Human Power

The 3rd screen is interesting for people who have a torque sensor in their system. The top line shows key vehicle stats: your voltage, amps and speed, while the 2nd line displays your human power input and pedal cadence.


Display #4 - Energy Mileage (Hidden on Fat Woody e-Cruiser)

Display Screen #4 - Energy Mileage

Display Screen #4 - Energy Mileage

The 4th screen is the same popular readout from the previous CA V2 devices which shows the net watt-hours taken from the battery pack, as well as your energy 'mileage' in units of Wh/km or Wh/mi. This is the equivalent to gas mileage in L/100km, and the smaller the number the better energy economy and longer range you'll get from a battery pack.


Display #5 - Human Stats (Hidden on Fat Woody e-Cruiser)

Display Screen #5 - Human Stats

Display Screen #5 - Human Stats

The 5th screen is a summary of the human power statistics for the trip, showing the total human watt-hours, along with the average watts and average pedal cadence. Note that the human watts are only averaged while the rider is pedaling, so if you coast or ride throttle only for a while this won't reduce your average.


Display #6 - Regenerative Braking (Hidden on Fat Woody e-Cruiser)

Display Screen #6 - Regenerative Braking

Display Screen #6 - Regenerative Braking

The relative benefits of regen are debated at length in the e-bike community, and the point of the screen is to at least help provide analytic numbers to the discussion. On the left you will see the % by which your range has increased as a result of regen, and on the right it toggles between the total forwards and reverse amp-hours that were accumulated. (The Ah display on the 1st and 3rd screen is the net difference).


Display #7 - Max and Mins (Hidden on Fat Woody e-Cruiser)

Display Screen #7 - Max and Mins

Display Screen #7 - Max and Mins

Screen #7 shows the electrical max and mins on the system. Usually the amps isn't all that interesting since it will be the same as your controller current limit, but the Amin will show the max regen current, and the multiplication of Amax and Vmin will typically coincide with the maximum power draw as well.


Display #8 - Speed Stats

Display Screen #8 - Speed Stats

Display Screen #8 - Speed Stats

Screen #8 shows Max speed, average speed, and trip time. In some cases you may see a somewhat wild value for MaxS. This can be the result of a double bounce in the speedometer pickup switch and adjusting the relative magnet and sensor positions can solve it.


Display #9 - Odometer

Display Screen #9 - Odometer

Display Screen #9 - Odometer

Here you can see the same total trip distance as the first screen (Main), but with much greater precision, along with the lifetime odometer of the vehicle.


Display #10 - Battery Stats

Display Screen #10 - Battery Stats

Display Screen #10 - Battery Stats

The battery statistics includes the lifetime cycles and amp-hours of the battery pack, along with a current estimate on the battery's internal resistance in Ohms. The Cycles count increments every time you reset the CA by holding the right button, and both the Cycles and Total Amp-Hours are unique to each battery. So if you have both an 'A' and 'B' battery enabled, you can keep separate stats on each pack.

The battery resistance is computed on the fly by seeing how much voltage sag accompanies changes in current draw. This stat is useful, not only to quantify the performance of the pack but also to assess its aging and cold weather behavior. The internal resistance of most batteries will start to increase well before there is much noticeable decrease in amp-hour capacity.


Display #11 - Diagnostics

The final display screen is most useful when initially setting up the CA for various feedback and control modes. On the top line you can see both the input throttle voltage from the user, as well as the output voltage that the CA is sending to the motor controller.

The bottom line has a row of limit flags showing which throttle limiting feedback loops are currently engaged. So if you are exceeding the speed limit, the 's' becomes a large 'S', and similar flags for the current limit (a/A), power limit (w/W), low voltage rollback (v/V) and thermal rollback (t/T).