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Gen 3.1 & 3.2
Gen 3.1 & 3.2
  • Introduction
  • Kayak
    • Assemble your power meter
    • Configure your power meter
      • Blade tip to hand distances
      • Blade tip to blade tip distance
      • Blade twist
      • Blade type attached to shaft
      • Left blade tip to LED distance
  • Canoe/Dragon Boat/SUP
    • Assemble your power meter (Gen 3.1)
    • Assemble your power meter (Gen 3.2)
    • Configure your power meter
      • Blade tip to hand distances
      • Blade type attached to shaft
      • Blade tip to LED distance
      • Shaft to handle offset distance
  • General
    • Battery Charging
    • Clamp Adjustment
    • Web Bluetooth App
    • Zero Offset Calibration
      • How to perform a Zero Offset calibration
    • Scale Factor Calibration
      • N channel Scale Factor calibration
      • O channel Scale Factor calibration
    • Updating Firmware
      • How to update the power meter firmware using the Web Browser
      • Latest firmware version
    • Real-time Data
      • How to pair with your device
    • High Speed Data
      • How to start/stop recording High Speed Data
      • How to download High Speed Data (ANT)
      • How to download High Speed Data (Automatic Script) - Experimental
      • How to view High Speed Data
    • Deep Sleep
    • GPS Sync Box
    • Metrics
      • Power
      • Force
    • Upgrade Description
    • Manufacturer's Warranty
    • Troubleshooting
      • High Speed Data Recording Fault
    • Shaft & Blade Sizing
    • Connections using hot melt glue
  • Training Guide
    • Functional Threshold Power
    • Power Zones
    • Fitness Tracking
    • Optimum Cadence
    • Technique Efficiency
    • Training to improve 30 second or 1 minute Power
    • Training to improve 4 minute Power
    • Training to improve Functional Threshold Power
    • Training to improve Endurance
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  1. General

Scale Factor Calibration

PreviousHow to perform a Zero Offset calibrationNextN channel Scale Factor calibration

Last updated 2 years ago

A Scale Factor Calibration can be performed using basic and easily sourced components, or with a specifically designed calibration jig available for purchase from One Giant Leap. There is also the option to have the calibration jig manufactured yourself; the profile cut part files and assembly instructions are available to download from One Giant Leap .

Setup

The calibration process requires the paddle to be setup in the following way:

  • Paddle shaft horizontal

  • Paddle assembled with the offset angle set to either 45 degrees Left Hand Twist, or Right Hand Twist (depending on which channel is being calibrated)

  • Supports located at the right blade centre and left hand positions

  • Calibration weights (with known weight) hung from the right hand position

The supports can be as simple as blocks of wood resting on two separate tables. The space between the two tables is where the calibration weights will hang. Ideally the supports will have narrow width (5-10mm wide) so that the paddle is supported at a definite spot which can be identified and measured. The calibration weights can be applied by suspending them from the shaft with a rope.

The calibration process requires the strain output to be recorded with at least 2 different calibration weights (heaviest weight at least 40kg). The values are then input into the calibration spreadsheet where the scale factors are calculated. The N and O channels of a kayak power meter are calibrated separately, so the process must be carried out separately for each channel.