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Summary of Contents for Grin Technologies Cycle Analyst 2.25 CA-SA
- Page 1 The Cycle Analyst Large Screen Edition User Manual...
- Page 2 The Cycle Analyst 2.25 The Cycle Analyst is designed and manufactured in Canada by: Grin Technologies Ltd. 20 E 4th Ave Vancouver, BC, Canada V5T 1E8 (604) 569-0902 email: info@ebikes.ca web: http://www.ebikes.ca Author and Illustrator: Justin Lemire-Elmore Copyright © 2011...
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Page 3: Table Of Contents
Table of Contents Basic Usage ......3 Device Summary ....4 Installation . -
Page 4: Basic Usage
Congratulations on your purchase of a Cycle Analyst, the first digital dashboard and battery monitor designed to the specific requirements of electric bicycles, scooters, and other small electric vehicles. This device measures the energy consumption and speed of a vehicle and displays this information and related statistics on an easy-to-read backlit LCD screen. -
Page 5: Device Summary
As a Fuel Gauge Amp-hours (Ah) are the 'fuel' equivalent of a battery pack, but rather than behaving like a fuel gauge and estimating how much fuel is left, the Cycle Analyst instead tells you exactly how much you have used, starting from 0 and counting upwards. -
Page 6: Installation
This shunt resistor must be wired in series with the negative lead of the battery pack. The power to run the Cycle Analyst then comes from the connection to the positive lead of the battery. The Stand Alone Cycle Analyst (CA-SA) includes a molded shunt capable of 45 amps of continuous current (100 amps peak) while the Direct Plug-in models (CA-DP or -DPS) requires access to the shunt resistor inside your motor controller. - Page 7 The remaining installation details depend on the model: Wiring of the CA-DP(S) With the Direct Plug models, simply plug the 6-pin connector of the CA into the matching 6-pin connector on the motor controller. Because there are large voltages present through this connector, it is a good idea to protect the pins with dielectric grease, particularly if it will be exposed to wet conditions.
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Page 8: Display Information
Display Information In addition to the screens discussed in , there are 5 others section 1 that show a range of statistical information relating to the energy use of your vehicle. Display Screen #3 - Power Information Watt-hrs: This is a measure of the total energy that has been pulled out of the battery pack. - Page 9 explicit regen braking can still produce negative current when they are driven at high speeds. As well, vehicles with a freewheel in the drive could regenerate for brief periods from the energy stored in the motor’s inertia. The formula used for computing this percentage is: RegenAh %Regen X 100...
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Page 10: Additional Resetting Options
Cycl: The cycles value increments when the meter is reset. Provided that the meter is reset each time the battery is charged then this will indicate the number of charge and discharge cycles on the pack. In order to prevent false cycle counts from cases where frequent resetting is performed, the value is only incremented if more than 1.6 amp-hours was drawn at the time of the reset. -
Page 11: Setup Menu
Setup Menu There are many setup options that can be accessed at any time by pressing and holding down the left button. Alternately, if only a single button interface is desired, then holding the right button while power is applied to the device will also enter the setup menu. Hold Left Button for Hold Right... - Page 12 The following table is a convenient reference on the circumference of several popular bicycle tire sizes. For highest accuracy, measure the actual circumference directly with a tape measure or similar technique. Tire Size Circumference Tire Size Circumference 16 x 1.50 1185 26 x 1.25 1953...
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Page 13: Using The Limiting Features
Main Display Finally, the last setup option allows the user to select whether the primary display screen shows watts or amps in the bottom left corner, depending on the user preference. The 2 display screen will always show both quantities. Select Watts 38.4 V 25.6 kph... - Page 14 The Cycle Analyst behaves similarly. When it senses that any one of the limiting quantities has been exceeded, then the throttle over-ride signal starts to decrease from its default resting value (usually between 4 to 5V, determined by ITermMax). A simple circuit is required so that the controller only sees the lower value of the throttle signal or the Cycle Analyst signal.
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Page 15: Advanced Setup Menu
Advanced Setup Menu The advanced setup menu is accessed by pressing and holding the button when the message 'advanced' shows up at the end of the regular setup menu, and allows for setting less frequently changed parameters. Range Mode There are two mode settings that are available to accommodate the wide scope of electric vehicles. - Page 16 Zero Amps Over time and with temperature fluctuations, it is possible for the zero point to drift, such that even when no current is flowing through the shunt a small number (like 0.03A) is displayed. This can be reset to zero by holding down the button after the 'zero amps' screen until the _OK flashes on the bottom right.
- Page 17 IntAGain Default = 300 This value determines how rapidly the over-ride output will ramp down when the current from the battery pack exceeds the programmed current limit. Too low of a value will result in considerable overshooting of the set point current, while too large of a gain will cause the controller to oscillate above and below the limit.
- Page 18 8.14 Set Ratio Default = 0.100 This is the amplification ratio between the high gain and low gain current amplifiers on the circuit board. It is usually around 0.10, is factory calibrated, and should not be changed 8.15 Serial Output Default = 1Hz This allows you to select between either a 1Hz or a 5Hz transmission rate on the Tx serial data output pad.
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Page 19: Using Advanced Features
Using Advanced Features There are several advanced features on the Cycle Analyst, but making use of these requires soldering to the circuit board. Incorrect wiring can easily damage the unit and it is only recommended for those who are familiar and comfortable with electronics. Using the Data Output (V2.1 and beyond) The pad labeled “Tx”... - Page 20 On-the-fly Current or Speed Limit (V2.11 and later) There are situations where it may be desirable to adjust the speed or current limit of the Cycle Analyst without having to change the settings in the setup menu. This can be accomplished by wiring a potentiometer such that it sends a voltage signal to the Vi pad: (R2 2K7) (CA PCB)
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Page 21: Operation In Wet And Cold Conditions
Firmware Programming The set of 5 header pads on the bottom right of the PCB is used for programming the microchip. The pinout is the same as recommended by Microchip’s “In-Circuit Serial Programming™ (ICSP™) Guide” and is compatible with most in-circuit serial programmers. We usually recommend the Microchip PICkit2, but many other programming devices will work as well. -
Page 22: Circuitboard Connections
Circuitboard Connections Precision Op-Amp PIC16F690 Microchip R-R Op-Amp Advanced Connections Character LCD Header Standard Connections: B1 = Primary button input G = Ground B2 = Secondary (back) button input Sp = Speedometer pulse input. Can be either magnetic reed switch to Gnd, or a 0-5V / 0-12V hall signal from the controller G = Ground ( black wire S- = Negative side of current sense Shunt Resistor. -
Page 23: Specifications
12. Specifications Voltage Range 10-150V Voltage Resolution 0.1V Current Draw Current Range ±200 mV/Rshunt. For instance, with a 2mÙ sense resistor, the maximum current is 100 amps. With a 0.5mÙ resistor, up to 400 amps, and so forth Current Resolution 0.01A in low range mode, 0.1A in high range mode Current Accuracy Temperature coefficient and accuracy depend on the shunt and calibration.
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