Saris Cycling Group The PowerTap C1 User manual

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USER GUIDE

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© 2015 Saris Cycling Group, Inc.
5253 Verona Road
Madison, WI 53711
All rights reserved. No part of this publication may be copied, photographed, reproduced, translated, transmit-
ted electronically or placed on digital media without the prior written consent of Saris Cycling Group, Inc.
Trademarks
Saris Cycling Group, Inc., PowerTap, and PowerTap 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.
Modifications
Saris Cycling Group, Inc. reserves the right to make improvements and/or updates to the products described
herein at any time without notice.
WARNING: Read this manual in it’s entirety before using this product. Improper use could
result in damage to the product or lead to injury.

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Table of Contents
1. Chainring contents and specifications
2. Installation and Removal
a. Compatibility
b. Install
3. Pairing
4. Calibration, Manual Zero
a. Auto-Zero
b. First Ride
5. Battery replacement
6. Firmware Updates
7. Precautions
8. Warranty
SECTION 1 – PACKAGE CONTENTS
1. Chainring w/sensor
2. Contoured Nuts (x5)
3. M137 Torx Bolts (x5)
4. Identification Card (not pictured)
5x
TOOLS REQUIRED
2.5mm hex key
T-30 Torx attachment
Adjustable torque wrench
OPTIONAL
5mm hex
6mm hex
Park Tool Chainring Wrench (CNW-2)
(not pictured)
SPECIFICATIONS
Crank Interface 5 bolt, 110 BCD compact
Connectivity ANT+ and Bluetooth SMART
Tooth Combinations 50/36, 52/36 and 53/39
Firmware Updates Over the air (OTA)
Added Weight About 150 grams
Battery CR2032
Battery Life 200 hours
5x1x

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Tools required – T-30 Torx Wrench (see image on pg 3)
5mm Hex Wrench, 6 mm Hex Wrench
Step 1- Remove your crank from your bike. Please reference the manual for the crank you
have for removal instructions.
Step 2- Remove the existing chainrings from your crank. There will be 5 chainring bolts and
nuts holding the chainrings to the crank. Fixing hardware varies from one crank to another.
Common tools are 5mm and 6mm hex (Allen) wrench, T-30 Torx or chainring nut tool.
Step 3- Check compatibility of the C1 to your crank. The surface of the C1 chainring sensor
must fully contact the inboard surface of the crank spider. Additionally, the 5 arms of the
crank spider should not be in contact with any area of the sensor cover. If the crank spider
arms are in contact with the sensor cover your crank is not compatible with the C1.
See installation video at powertap.com
SECTION 2 – INSTALLATION AND REMOVAL
A. COMPATIBILITY
The PowerTap C1 power meter is compatible with a number of popular crank sets. The C1
fits most 5 bolt, 110 BCD cranksets. The C1 is not compatible with 130 BCD cranksets,
SRAM Exogram cranksets (hidden bolt), Campy cranksets, or any Shimano 4 bolt asymmetric
cranksets. For a list of the most up-to-date compatibility information go to
www.powertap.com/uploads/PDF/powertap-manuals/powertap-c1-crank-compatibility.pdf
IMPORTANT: If the C1 is used with an incompatible crank damage to the sensor
could occur. Any damage caused to the C1 due to improper installation or
installation to incompatible cranks will not be covered under warranty.
B. INSTALL AND REMOVAL

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Step 4- Install the C1 chainring to your crank. Use the contoured nuts and M137 chainring
bolts that came with your C1 to affix the chainrings to your crank. Place the chainring on the
inboard side of the crank lining up the holes on the chainring and crank spider. Line the C1
chainring up so the chain pin is inline with the drive side crank arm.
IMPORTANT: If the C1 is used with an incompatible crank damage to the sensor
could occur. Any damage caused to the C1 due to improper installation or
installation to incompatible cranks will not be covered under warranty.
Chain Pin
If installed properly the chain pin should sit behind the crank arm.

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IMPORTANT: The bolts connecting
the sensor to the chainring are
plugged and should not be
tightened or loosened (see image
to right).
Sensor
Place one of the contoured nuts through
the crank arm spider hole and chainring
sensor. Thread one of the M137 bolts
through the chainring sensor and into the
contoured nut from the inboard side of
the crank but do not fully tighten. Repeat
this step for each of the remaining arms
of the crank – 5 total. Once all 5 con-
toured nuts and bolts are in place tighten
each of them to the torque specification
7nm (62in lbs) in a star pattern (follow
the numbers as indicated in the illustra-
tion to the right).
Step 5- Reinstall the crank to the bike.
For best results follow the installation
instructions in the crank manufacturers
product manual.
1
2
3
4
5
If the chain pin is positioned correctly as indicated on
the previous page then the sensor should be aligned
to the right when the driveside crank arm is in the
6 o’clock position.

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SECTION 3 - PAIRING
For pairing instructions specific to your receiving device see your display unit’s instructions
for pairing.
To Pair:
Awake the chainring by spinning the crank a few times.
Go to the SENSORS screen on your display and select POWER SENSOR from the menu and
initiate the pair. Note: this can take up to 60 seconds.
When the ID from the appropriate sensor shows on the display screen select this sensor by
pressing the ENTER button. Then activate the sensor.
The C1 Chainring broadcasts data using Bluetooth Smart and ANT+ simultaneously. You can
pair your chainring to any device using either of these wireless protocols.
SECTION 4 - CALIBRATION AND MANUAL ZERO
Each PowerTap C1 chainring is dynamically calibrated from the factory to the highest
standard. Calibration values cannot be changed by the user. However, it is important to pe-
riodically zero the offset manually. Before performing a manual zero unclip from the pedals
and make sure there is no load on the drivetrain. Navigate to the sensor screen on the Joule
GPS+ and select Calibration. Initially, numbers will display related to the previous zeroing of
the calibration offset. With Manual Zero selected Press the ENTER button to zero the offset.
If using different brand head unit refer to the manual for specific zero offset (calibration)
instructions.
Bluetooth Smart is the low energy version of Bluetooth wireless technology. Learn more about
this technology visit www.bluetooth.com
ANT+ is a low energy form of wireless technology used in many sport electronics. To learn more
about ANT+ visit www.thisisant.com

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Power Sensor
9:34A
Activate Sensor
Start Paring
Name
Power2
Sensor ID
2484
Circumference, mm
2096
Auto Zero
On/Off
Battery
---
Crank Lenght
Delete Sensor
Calibration
Back to Bike
Main Menu
Ride
History
Sensors
Training
Navigation
User
Device
Back to Dashboard
9:34 A71º
Sensors
Select a Bike
Bike 1
Bike2
Add a Bike
Calibration
Back to Main Menu
9:34 A
Bike1
Name
Bike1
Weight
17.0
Pair All
Power Sensor
Power1
Cadence Sensor
None
Speed/Combo
None
Heart Rate Sensor
HeartRate1
RU Sensor
None
Delete Bike
Back to Sensors
9:34A
A. AUTO-ZERO
Each C1 Chainring power meter has auto-zero functionality. Auto-zero allows the power meter
to reset the zero offset during a ride. Most power based cycling computers have the ability to
turn auto-zero on and off. To activate the auto-zero functionality make sure auto-zero is ‘on’ in
the computer you are using.
B. FIRST RIDE
After installation there is a short break-in period where the hardware and fasteners will settle
in. During this period offset values will change while riding and eventually become static. You
may notice that power values are slightly off while the offset is changing. To accellerate the
brake-in it is best to perform several short bursts of high power output. After performing the
short, high power output bursts perform a MANUAL ZERO to reset the offset. The normal break-
in period takes between 15 - 60 minutes.

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SECTION 5 – BATTERY REPLACEMENT
Tools required: 2.5mm hex wrench
Your C1 Chainring comes with a battery installed out of the box.
STEP 1 - To replace the battery use a 2.5mm hex wrench to remove the bolts holding the
electronics cover on.
STEP 2 - Pull the electronics cover off the C1 Chainring.
STEP 3 - Remove the battery and replace it with a new CR2032 battery.
STEP 4 - Note the orientation (+ side out) of the battery prior to reinstallation of the elec-
tronics cover. Next, make sure the ring seal is correctly seated on the shelf of the electronics
housing. Reinstall the electronics cover, pushing it down fully before threading in the hex
bolts.
STEP 5 - Once the electronics cover is fully seated over the electronics housing, thread in the
2.5mm hex bolts and tighten to the torque specification 3 in lbs.

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SECTION 6 - FIRMWARE UPDATES
Firmware on the C1 can be updated wirelessly when new firmware releases are available.
Over-the-Air firmware updates allow users to enjoy the full capabilities of the C1 Chainrings
including ongoing enhancements. For more information on firmware updates, current firm-
ware versions, and update instructions please visit www.powertap.com/firmware
REPLACING CHAINRINGS: Chainrings are a wearing part and need to be replaced when
worn. PowerTap sells replacement chainrings that can be purchased at powertap.com
or from your local dealer. It is recommended that a calibration be performed anytime
the chainrings are replaced. This can be done at PowerTap headquarters.
When replacing chainrings a torque wrench and T-30 Torx bit is required. To replace
the chainrings remove the crank from your bicycle, then remove the worn chainrings.
Note the orientation of the chainrings to the sensor. There is a keyed interface between
the chainring and sensor where the electronics are situated. When reinstalling the
new chainrings, tighten the bolts using a star pattern. Progressively torque each of the
chainring bolts to 7nm (62in lbs).