OWNER’S MANUAL Cervo 2.4 Cervo 2.
Copyright Copyright 2005. All rights reserved. No part of this publication may be copied, photographed,reproduced, translated, transmitted electronically or placed on digital media without the prior written consent of Saris Cycling Group, Inc. Trademarks Saris Cycling Group, Inc. Cervo 2.4 and the Cervo 2.4 logo, are all registered trademarks of Saris Cycling Group, Inc. All other product, brand, or trade names used in this manual may be trademarks or registered trademarks of their respective owners.
About This Manual Thank you for your purchase of the CycleOps Cervo 2.4. The Cervo 2.4 is the ultimate bicycle computer by providing real-time biometric data and download capabilities. This manual describes the proper use and maintenance of the CycleOps Cervo 2.4. Every person, independent of skill level, should read at least PRECAUSTION: IMPORTANT prior to use of the Cervo 2.4.
Table of Contents About this Manual Precautions: Important System Overview The Cervo2.
Precautions: Important • Before beginning any exercise program, consult your physician. • Keep your eyes on the road. Do not become overly engaged with the Cervo2.4 display. • • We recommend familiarizing yourself with computer functions while stationary, • Wash off dirt with a cloth soaked in a weak mixture of neutral detergent and water and wipe excess water off with a dry cloth Avoid spraying the unit directly with solvent mixture.
System Overview THE CERVO 2.4 SYSTEM The Cervo 2.4 system includes a computer and harness which measures speed, distance, cadence (Pro), and heart rate. This information is transmitted via receiver placed on the front fort. The receiver transfers the data via a wired signal to a computer mounted on the handlebar or stem. Heart rate data is transferred via a non-coded telemetry signal from the chest strap monitor. The data is then integrated to display current, average, and maximum biometric information.
SYSTEM INSTALLATION 1. Attach Sensor to Fork Attach sensor to front fork so the magnet passes within 3-5 inches of the sensor (FIGURE1). Place cable tie through sensor to secure. Make sure the logo side of the sensor faces the magnet. SPOKE FORK 1/2” (12.7 MM) MAX SPEED SENSOR SPOKE MAGNET 3. Attach Computer Shoe to Handlebar or Stem The receiver shoe can be mounted on either the handlebar or stem. Secure the mounting base with cable ties.
FIGURE 3 4. Install Cadence Sensor (Pro) Only the Cervo Pro is able to measure cadence with the included cadence sensor. First install the pedal cadence sensor to the left chain stay in line with the pedal spindle. Next attach cadence magnet to the crank arm. Ensure the center of the magnet passes the line of the sensor unit. Do not center the magnet in relation to the sensor (FIGURE 3). See COMPUTER SETUP 4 to correctly configure the computer for the chosen method of cadence determination.
7. Verify Installation Check to make sure all components are properly secured. Spin wheel and verify that in the upper left hand corner of the computer the transmission icon illuminates (FIGURE 6). This indicates the sensor is properly transmitting a signal to the computer. If the transmission icon is not illuminated consult TROUBLESHOOTING for further instructions.
General Computer Operation DISPLAY LEVELS The computer has three (3) main display levels: Top Middle Bottom • • • INTERVAL Heart Rate DISPLAY Speed Multi-Function Display 3 D 144 3 25 CURRENT HEART RATE 2.4 58.I0 SPEED DISPLAY MULTI DISPLAY NOTE: The current display level is indicated by two black cursors located on either side of the computer display.
4) Hold [MODE] and [SELECT] = simultaneously press and hold both [MODE] and [SELECT] for 2 sec. NOTE: Continuing to hold longer than 2 sec. will clear all data. 5) Extended Hold [MODE] and [SELECT] = simultaneously press and hold of both [MODE] and [SELECT] for greater than 5 sec. SCROLLING MENU: Find: If [MODE] and [SELECT] are released When “Find” is displayed the computer will find Search for the PowerTap hub. clr: If [MODE] and [SELECT] are released when clr is displayed ALL DATA WILL BE ERASED.
Computer Navigation HEART RATE FUNCTION The top level of the main display shows current, and average heart rate readings. 1) Press [MODE] to scroll the cursor to the top line of the main display. 2) Press [SELECT] to toggle through the heart rate function options. Current Heart Rate Current heart rate is displayed on the top line and shown up to 255 beats per minute (BPM) (FIGURE 8). You must wear the heart rate chest strap to enable the heart rate measurement function. NOTE: The Cervo2.
2) Press [SELECT] to toggle through the speed function options. FIGURE 10 Current Speed Speed is displayed in either miles per hour (MI) or kilometers per hour (KM) up to 99.9 mi/hr or km/hr in 0.1 mi/hr or km/hr increments. Current speed readings are displayed when only “MI” or “KM” appears below the middle line.
FIGURE 13 2) Press [SELECT] to toggle through the multi-function displays until the “D” icon is displayed. 165 3 25 NOTE: Distance is displayed in the same units as speed. MI D 58.I0 Trip Time and Time of Day (T) Total trip time, interval time, and time of day is displayed to 9:59:59 (FIGURE 14). 1) Press [MODE] to scroll the cursor to the bottom line of the main display. 2) Press [SELECT] to toggle through the multi-function displays until the “T” icon is displayed. FIGURE 14 165 25 3 MI 2.
2) Press [SELECT] to toggle through the multi-function displays until the “C” icon is displayed. (FIGURE 15) FIGURE 15 365 3 25 WATTS Average Cadence (C & AVG) Only the Cervo2.4 Pro is able to measure cadence with the included cadence wire package. The average cadence displays data since the last time data was cleared in trip mode or the selected interval in interval mode. Average cadence is displayed in RPM. MI 89 C 1) Press [MODE] to scroll the cursor to the bottom line of the main display.
Odometer (O) Total accumulated distance traveled since the last system reset is displayed in miles or kilometers. To manually input the your odometer reading see COMPUTER SETUP 1. 1) Press [MODE] to scroll the cursor to the bottom line of the main display. FIGURE 18 165 25 3 MI 2584 O 2) Press [SELECT] to toggle through the multi-function displays until the “O” is displayed.
INTERVAL MODE The computer has two display modes. The trip mode shows total trip metrics, and the interval mode displays interval specific information. The interval mode functions as a lap marker and is essentially always on. heart rate int speed multi To begin the first interval, or advance to the next interval: Press and release [MODE] and [SELECT] simultaneously. NOTE: Do not hold both buttons down as you will clear all data from the computer.
INTERVAL MEMORY MODE To access stored interval data for the previous 9 intervals only: 1) Enter the interval mode hold [MODE] until “INT” appears on the left hand side of the display. 2) Press [MODE] to scroll until the “INT” flashes. NOTE: INT now constitutes a fourth level of display. 3) Hold [SELECT] and the memory icon (”M”) appears next to the interval number (FIGURE 20). 4) With “INT” flashing, press [SELECT] to advance to the interval you wish to view.
Computer Setup The setup feature has four (4) main modes. You do not have to complete all four to change settings. Please reference each mode to determine the correct location to begin. NOTE: The computer illustrations for each mode display the factory default settings. COMPUTER SETUP MAIN MENU 1) Press either [MODE] or [SELECT] to activate the computer. NOTE: The version of firmware is displayed upon startup. The most updated firmware version is available at www.cycleops.com. (FIGURE 21) PR 2.
COMPUTER SETUP 1 This setup menu includes: time of day, date, storage rate, wheel circumference, units of measure, odometer. NOTE: You are unable to move back to a previously viewed settings. You must restart setup 1 to make corrections. 1) From the computer setup main menu press [SELECT] and scroll until the number one (1) is flashing. Press [MODE] to enter setup mode. Std 1 2) Press [SELECT] to toggle between a 12 or 24 hour clock. Press [MODE] to save.
Year Std 03 5) Press [SELECT] to toggle through digit values to set minutes in time of day. Press [MODE] to save. 01c Day Month 6) Press [SELECT] to toggle through digit values to set year, month, and date. Press [MODE] to save. Std r 7) Press [SELECT] to toggle through storage rate values (1, 2 seconds). Press [MODE] to save. NOTE: Different storage rates yield different amounts of total storage time. Changes to the storage rate does not effect display information.
Std CI 1 2096 8) Press [SELECT] to toggle through digit values to set the wheel circumference. Press [MODE] to save. Refer to TABLE 4 for common tire information. NOTE: For the most accurate reading perform a roll out measurement (mm) of the rear wheel. TABLE 4 - Common Wheel Circumferences Tire Size Wheel Circumferences Circ.(mm) Tire Size Circ.(mm) 24 x1.0 26 x1.0 26 x1.25 26 x1.5 26 x 2.0 26 x 2.125 27 x1.0 27 x1.125 1753 1913 1953 1986 2055 2070 2125 2139 Std 27 x 1.
Std 1 OD 10) Press [SELECT] to set starting odometer reading. Press [MODE] to save. NOTE: Odometer settings are saved during battery changes.
COMPUTER SETUP 2 This setup menu includes: rate of display for watts, speed, cadence, and heart rate. NOTE: You are unable to move back to a previously viewed settings. You must restart setup 2 to make corrections. NOTE: These settings do not effect the data stored for download. This function can be used to allow better pacing during time trial efforts. A greater rate of display allows for a slower update of the display.
COMPUTER SETUP 3 This setup menu includes: zero readings for power, speed, and cadence. NOTE: You are unable to move back to a previously viewed setting. You must restart setup 3 to make corrections. NOTE: These settings are useful for determining you average when pedaling only and do not effect the data that is stored for download. PR AV WATTS 0s 3 YES 1) Press [SELECT] to toggle between yes and no for zeros included in average of watts. Press [MODE] to save.
COMPUTER SETUP 4 This setup menu includes: sleep time, locations of display, cadence source, cycle computer mode, heart rate monitor, and auto start/stop. You are unable to move back to a previously viewed settings. You must restart setup 4 to make corrections. PR 4 1) Press [SELECT] to set how many minutes the computer will stay “awake” after not receiving a valid speed or heart rate signal. Press [MODE] to save. NOTE: The shorter the sleep time the better the battery life.
PR 5) Press [SELECT] to toggle through auto start options. watts 4 mi data mi, and data = allows trip time to count when wheel speed is registering. Trip time stops 3sec. after if speed is not registered. ( ), and data = allows trip time to count as long as a heart rate signal is registered. This function is useful in the transition from cycling to running and vice versa. Press [MODE] to save.
hub 1 Id LEArn flashing 4) Press [Mode] until Learn 2 is displayed. Learn 2 is used when there are other "awake" or active PowerTap SL 2.4 hubs within a 30 foot radius. hub 2 3) Learn 1 is initiated by Holding [Select] until "Learn" begins flashing. When the CPU has learned the device I.D. it will display the I.D. Press [Mode] to advance to the next device I.D. If it did not learn the device it will take you back to the most recent Hub I.D.
Maintenance & Specifications COMPUTER BATTERIES The Cervo2.4 computer batteries typically need to be changed every 400 hours of use. The computer will says “low bat” when the computer battery needs to be changed. This message is displayed after a “clr” is performed. To replace computer battery (Type CR2032), remove the computer from the mount.
TEST MODE 1) From the computer setup main menu press [SELECT] and scroll until the letter “t” is flashing. Press [MODE] to enter setup mode. 2) Press [MODE] to scroll through the different test modes as shown by the number. NOTE: Press and hold [MODE] and [SELECT] simultaneously returns to standard operation. 0 - Model and version. Displays the model on the middle line and version number on the bottom line. 1 - LCD Test Press [SELECT] all the LCD segments are displayed.
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.
Glossary Computer - Refers to the yellow handlebar or stem mounted device. Heart Rate (HR) - This displays current HR. Max and average values are displayed if [MAX] or [AVG] is selected. NOTE: A non-coded chest strap must be used in order for the console to pick up heart rate. Cadence (C) - The number of pedal revolutions per minute. The rate of pedaling is shown from 0 to 140 RPM. Speed - The estimated speed that you would be traveling on a flat road with no wind is displayed here.
