Calibration procedure: SRM

[7ryder]

Using the iBike Aero as a head unit for my SRM and just installed it on the bike today. HR monitor, Garmin cadence/speed monitor and SRM all paired successfully.

In reading the instructions for calibrating a DFPM (from "Gen III Pairing and Operating instructions for Ant+Sport DFPMs), my Aero's screens don't match what is in the instructions....

Step 5 says go to the screen that shows "PCAL/IDLE" and all I have is PCAL and a 0 (zero), it doesn't show "idle".

Step 6 says to press the up arrow of the iAero and I'll see "PCAL/START". I do see a really quick "start" when I follow step 6, but then the 0 immediately turns into a higher number which is apparently the calibration number from the SRM and it is flashing (in the case of today, flashing back and forth from 569 to 570) and I don't get the options in Step 7 (see below).

Step 7 states that if I press the center button of the iAero, I'll see a message "PCAL/PROC"....I don't. This step also says that I will see "PCAL/DONE" or "PCAL/FAIL" depending on the success/failure of the calibration process...I haven't seen either. I press the middle button while the number is flashing and I don't get anything for several pushes of the button, then it goes to the "WLS/CFG" screen. However, when I scroll through the menus to the PCAL screen again, I can see a calibration number on this screen -- 570.

So the big question is -- is the iAero working correctly and is this how the calibration process is supposed to work despite what the instructions state?

Also, at this point, if I only care about the power readings from the SRM (or my Powertap on my other bike), I don't have to do either the tilt and/or wind offset calibrations for initial set up or before every ride do I?

Thanks.

[coachboyd]

The number that you are seeing is the offset value of the SRM. When you see that number it means your SRM has been zeroed and you are good to go. This is also a good way to tell that the SRM readings are good because you can check that offset number.