New to TR and smart trainer so if the answer if obvious I apologise now.
I paired my trainer to TR and my PM to a head-unit to compare to two numbers, just to check for any discrepancies. Reason for this is that only one bike has a PM (TT) and the other doesn’t (road). When using the TT bike I can use PowerMatch… no problem. Problem occurs when I use the other bike.
I performed a test using ERG mode where I increased the watts by 25 every couple of minutes (created using the Workout Creator). This provided a decent time period for things to settle in and capture a reasonable power average. As expected… the trainer reported exactly what I had set it to but the head-unit (PM) was out. At lower watts, less than 150, they matched well, 1-2 watts difference. However, above that the gap grew quite drastically. When the trainer in ERG said 200 the PM reported 221 (average for a couple of mins). This gap remained constant through to 300w (reported ERG mode). I terminated the test there as i know have 9 intervals to compare.
After a 15 minute warm up the PM was Zero Offset and the trainer had a Spin-down Calibration.
What is my best course of action when using the bike without a PM? Is there any way of calibrating my trainer to match my PM? Is there anyway of offsetting the trainer? Or do I just get on with it; whenever I use the road bike on there I just change my FTP by the required amount?
Any tips or tricks welcome.