Qalvin is Quarq's application for iPod Touch, iPhone and iPad that enables calibration and advanced diagnostics of CinQo powermeters.
Preview and download Qalvin for iPhone on the iTunes store.
Preview and download Qalvin for Android on Google Play.
For iDevices, such as your iPhone,iPod or iPad, you will need a Wahoo Key to operate Qalvin. This is an ANT+ transceiver that plugs into the iPod Touch, iPhone or iPad and is sold by Quarq for $60.
While there is no collective user manual, each page of Qalvin is linked to a help page that will step through the specific functions available on that page.
Should I use Qalvin? Do I need Qalvin?
Qalvin, like any tool, should be used with care, caution and due diligence; by someone with full understanding of the functions, capabilities and consequences of its use.
While many of Qalvin's functions are passive, such as System Information and Set Zero (Manual Calibration), many others are not. A full understanding of the use of Qalvin's higher end functions, such as setting of Slope, changing Settings such as Torque and Cadence Direction can have drastic affects on rider data.
See Qalvin's Inline Help for more information about specfic features.
Can I run Qalvin on my iDevice without the Wahoo Key?
Why does the Adjust Slope function make inconsistent changes, particularly when reducing the slope?
I have an iPhone5 (or newer iPad and iPod) with the Lightning Connector (5 Dock Connector), how do I use the 30-pin Wahoo Dongle?
I want to swap between two sets of rings, road and TT. How can I use Qalvin to do that?
There are four ways to adjust the calibration of the Quarq power meter in Qalvin.
- Adjust the slope.
- Enter a known Slope value.
- Carry out a complete calibration, with a standardized weight.
- Use the Calibration Tables.
How can one determine what the difference in slope is between two different sets of rings?
An extensive list of chainrings can be found on the Ring Calibration Tables page. By selecting the rings a specific Quarq power meter was calibrated, and the rings being changed to, a Quarq power meter's slope can be adjusted accordingly.
The latest version of Qalvin, 1.3+, has the calibration tables integrated into the application. Select Calibration Tables from within the Slope functions to see them.
Can I use a Digifit Connect or a Garmin ANT+ sensor with Qalvin?
The Garmin&tm; use a different application protocol, and is not compatible with Qalvin.
Will Qalvin work with 1st Generation Quarq power meter powermeters (not the Quarq power meter Saturn)?
Where can I purchase the weight and hook seen on the video?
The weight used in the video is a 20kg Grip-Handle Test Weight, Part Number 1788T26 from MCMaster-Carr.
The hook specifically designed for the weight, stays upright when not engaged on the pedal, with a polished powder coat finish, can be purchased from Quarq for $5, plus shipping and handling.
Can you please step through what Jim says in the video about weights?
The reference weight should have 10 times the precision of what you're measuring. If you want +/- 2% accuracy in your Quarq power meter, you want +/- 0.2% accuracy in your reference weight.
We did the following tests prior to creating the video:
- Took a 20lb reference weight to UPS. It weighed 19.95lb, which is 0.2% accuracy. You could therefore use UPS (the one in Spearfish, SD, anyway) to check your weight.
- Took a 20lb reference weight to USPS. It weighed 19lb 15.8oz, which is 0.06% accuracy. In this case USPS is an ever better choice.
- Took a department store 50lb dumbbell to both places and found it weighed 51.05lb at UPS and 51lb 1.2oz at USPS.
You must check your weight. If it is not a calibrated test weight, the USPS scales will give you better than the desired level of accuracy.
Video: Calibrating Your Powermeter
Qalvin enables you to calibrate your powermeter’s slope by hanging weights from the bike’s cranks. This video explains what weights to use and how to set up the bike, and goes through the calibration process end-to-end.
The weight used in the video is McMaster-Carr's 20kg Grip-Handle Test Weight. Part # 1788T26. These come with a certificate of accuracy to +/- 2g.