The SRM System User Manual describes a comprehensive training system for cyclists, primarily focused on power measurement and data collection. The system includes a PowerMeter, PowerControl head unit, and various accessories designed to enhance training and performance analysis.
Function Description:
The SRM system is designed to provide cyclists with accurate and real-time power, cadence, speed, and heart rate data. The core components are:
- SRM PowerMeter: This is the central component for measuring power output. It is integrated into the bicycle's crankset and measures torque and angular velocity to calculate power. The PowerMeter transmits data wirelessly to the PowerControl or other compatible head units.
- SRM PowerControl (PC8): This is the head unit that receives, displays, and stores data from the PowerMeter and other ANT+ accessories. It allows users to view real-time training metrics, set up rider profiles, customize display screens, and download ride data for analysis. The PC8 also features GPS for time setting and potentially speed/distance tracking.
- Cadence Magnet: Essential for the PowerMeter to turn on and measure cadence, this magnet is installed on the underside of the bottom bracket shell.
- Speed Sensor and Magnet: An optional ANT+ accessory that measures wheel speed and distance. The sensor is mounted on the fork, and a magnet is attached to a spoke on the front wheel.
- Heart Rate Strap: An ANT+ accessory for measuring heart rate, providing additional physiological data for training analysis.
- Handlebar Mount: Secures the PowerControl head unit to the bicycle's handlebar.
- USB Cable: Used for connecting the PowerControl to a computer for charging, firmware updates, and data download.
The system aims to provide a robust platform for athletes to monitor and analyze their performance, enabling data-driven training decisions.
Important Technical Specifications:
- PowerMeter Serial Number and Slope: Each PowerMeter has a unique serial number and a slope value (Hz/Nm) printed on it, which are crucial for calibration and accurate power calculation.
- Cadence Magnet Positioning: The cadence magnet must be positioned between 21-51 mm from the center point of the bottom bracket shell for proper function.
- Speed Sensor Magnet Alignment: The speed sensor magnet should be aligned with the timing mark on the sensor, with a gap of 1-4 mm between them.
- Handlebar Mount Torque: The handlebar mount bolt should be tightened to 1-2 N.m using a 3 mm hex key.
- Wireless Communication: The system utilizes ANT+ technology for wireless data transmission between the PowerMeter, PowerControl, and other accessories.
- PowerControl Battery Life: The PowerControl has a rechargeable battery with an approximate life of 500 charge cycles, typically providing 3-5 years of uninterrupted use depending on conditions.
- FCC Compliance: The devices (WCS-PM7 and WCS-PC7) comply with FCC Part 15 rules, Industry Canada RSS-210, and ICES-003, ensuring they do not cause harmful interference and accept received interference.
Usage Features:
- Installation:
- PowerMeter: Installed according to the original crank manufacturer's instructions. Professional installation by an authorized dealer is recommended.
- Cadence Magnet: Can be installed using a cable guide or double-sided tape, with specific positioning requirements (4-6 mm from the backside of the PowerMeter). Alternative mounting options are available for specific frame geometries.
- Handlebar Mount: Easily installed on the handlebar with a 3 mm hex key.
- Speed Sensor: Mounted on the fork with zip ties, with the magnet on the front wheel spoke.
- Pairing: The PowerControl/head unit must be paired with the PowerMeter and any desired ANT+ accessories (speed sensor, heart rate strap) to receive data.
- Zero Offset: Users need to set the Zero Offset on their PowerControl or head unit for accurate power readings.
- GPS Functionality: The PC8 uses GPS to set the correct time for the user's location.
- Data Analysis: The SRM Device Agent software allows users to create personal rider profiles, customize display settings on the PC8, and enhance connectivity to data analysis software (SRMX or SRM WIN).
- Software Compatibility: SRM provides compatible software (SRMX or SRM WIN) for various operating systems to download and analyze training files.
- Customization: The Device Agent allows for customization of the PC8 display and rider profile.
Maintenance Features:
- Cleaning: The PowerMeter and PowerControl are sealed against water entry. They should be cleaned with a mild detergent and a soft brush or cloth. Pressure washers and solvent parts washers should be avoided.
- PowerMeter Battery Service: For PowerMeters with non-rechargeable or depleted rechargeable solid-state batteries, the unit must be returned to an SRM Service Center for battery replacement and service. For crank spindle batteries, specific instructions on www.SRM.de apply.
- PowerControl Battery Maintenance: The PowerControl has a rechargeable battery. Keeping it charged is recommended, as storing it with zero charge can decrease battery life. When the battery no longer holds a charge, the PowerControl needs to be returned to an SRM Service Center for replacement and service.
- Crank Manufacturer Recommendations: Users should refer to the original crank manufacturer's recommendations for service procedures and intervals for the crankset components.
- Battery Status Monitoring: Battery usage can be checked in the SRM Software or on the PowerControl's BATTERY STATUS SCREEN.
- Disposal: Batteries should be disposed of according to local and federal regulations.
- Authorized Service: Product repairs should only be made by an authorized SRM Service Center to maintain warranty validity and device functionality. Unauthorized repairs or modifications can void the warranty and authority to operate the device.
Warranty and Crash Replacement:
- Limited Lifetime Warranty (North America): Covers structural and electronic components of new SRM PowerMeters and PowerControls for the original consumer/purchaser. Excludes batteries, power supply, normal wear and tear, improper installation, abuse, unauthorized service, and accessories.
- One-Year Limited Warranty (Associated Products): Covers chainrings, chainring-bolts, crank arms, bottom brackets, accessory mounting devices, magnets, speed pods, and ball bearings for one year, provided they are purchased from and installed by an SRM service center or authorized dealer.
- One-Year Limited Warranty (Refurbished Products): Covers refurbished PowerMeters and PowerControls for defects in materials or workmanship for one year. Excludes cosmetic damage, improper fitment/installation, crash damage, and unauthorized modifications.
- Lifetime Crash Replacement Policy: Offered to the original owner of SRM PowerMeters. Damaged products can be replaced at a reasonable charge, provided the damaged part is returned with proof of purchase. This policy covers the product itself but not labor for repair/rebuild or shipping costs.
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