I believe that the Garmin 500 can send an updated slope value back to the cranks.
Amazed that the Pc7 cannot.
What other Garmin models can also send back this slope does anyone know?
The SRM PowerMeter is a transmitter, not a receiver, for the purposes of power measurement. The slope value is programmed into the PowerMeter and is transmitted to a Garmin 500 or a PowerControl 7. The slope value is integral to the power equation. The head unit only requests a slope or offset frequency value.
If your concern is re-programming your slope value, the Garmin cannot do this. You can however change your slope value IN the PowerControl7 manually.
Please feel free to give us a ring at the SRM Service Center, we are always happy to explain the technology more and answer any questions.
Rachel Weiss
SRM USA
719-266-4127
The SRM PowerMeter is a transmitter, not a receiver, for the purposes of power measurement. The slope value is programmed into the PowerMeter and is transmitted to a Garmin 500 or a PowerControl 7. The slope value is integral to the power equation. The head unit only requests a slope or offset frequency value.
If your concern is re-programming your slope value, the Garmin cannot do this. You can however change your slope value IN the PowerControl7 manually.
Please feel free to give us a ring at the SRM Service Center, we are always happy to explain the technology more and answer any questions.
Rachel Weiss
SRM USA
719-266-4127
Thanks Rachel.
Am I correct in saying that Garmins read the slope as transmitted from the cranks? i.e. in a PC7 you enter the Slope but Garmins grab it over the air?
Both the Garmin 500 and the PC7 will automatically detect the slope (wirelessly). The PC7 gives you the added ability to enter a slope manually.
Kindly, Rachel
Both the Garmin 500 and the PC7 will automatically detect the slope (wirelessly). The PC7 gives you the added ability to enter a slope manually.
Kindly, Rachel
Okay - and then likes of a 910xt?
Just so I’m clear. If you have a wireless SRM and use only a Garmin head unit and don’t own a powercontrol you can’t adjust the slope?
Correct. You can only manually adjust slope in a PC7. The Garmin simply receives the pre-programmed slope from the SRM PowerMeter.
Thanks. Good to know. I have a wired SRM so it’s not an issue, but have been contemplating getting a wireless SRM and didn’t realize you needed the PC7 to change the slope.
Happy to help. Although, typically you would not need to change the PowerMeter slope. You can always call the SRM Service Center in Colorado for wireless upgrade information: 719-266-4127. -Rachel
Correct. You can only manually adjust slope in a PC7. The Garmin simply receives the pre-programmed slope from the SRM PowerMeter.
Just to be certain (the dumb question is the one not asked) - for the case of a wireless SRM power meter the slope can only be changed from the slope programmed into the power meter at the factory or service center by a PC7 or PC6. Does this actually change the slope programmed into the power meter when the PC6/7 is subsequeently paired to the power meter ?? In other words if someone had both a PC6/7 and a Garmin 500 could the PC6/7 be used to change the slope of the wireless power meter which would then be used by the Garmin 500 or is the slope “hard coded” into the power meter when factory calibrated.
In the case of a SRM Wireless PowerMeter, the slope programmed into the PowerMeter can only be changed at the SRM Service Center during a factory calibration. However, if you want to manually enter a different slope into the PC7 you can - and this will be the number used to calculate your power data rather than the factory calibrated slope stored in the PowerMeter.
Hope this is helpful, Rachel
I have an SRM and PC7… been a happy user for the last few years. Just curious as to why someone would want to manually adjust the slope.
To makzke 2 different powermeters match for one reason.
Here’s a quick example: The PowerMeter slope can change when you switch between round rings and Osymetric rings. If someone is trained and experienced with “At Home Calibrations” they may want to mount Osymetric rings for a TT, calibrate the PowerMeter at home, and manually enter the new found slope in the PC7. After the race they can put the round rings back on and reset the original slope. We do not recommend at home calibrations, but some prefer this method.
Ah… I see. Interesting.
In the case of a SRM Wireless PowerMeter, the slope programmed into the PowerMeter can only be changed at the SRM Service Center during a factory calibration. However, if you want to manually enter a different slope into the PC7 you can - and this will be the number used to calculate your power data rather than the factory calibrated slope stored in the PowerMeter.
Hope this is helpful, Rachel
So if you use the Garmin readout the factory calibration is locked in. Thanks for the clarification.
a garmin edge 500 will change the transmitted slope on an srm wireless ,under sensor details with crank awake the edge will display the current slope,you can edit that field with your new slope and it will
transmit it back to the crank
Neil
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a garmin edge 500 will change the transmitted slope on an srm wireless ,under sensor details with crank awake the edge will display the current slope,you can edit that field with your new slope and it will
transmit it back to the crank
Neil
Thanks much - I have both Garmin and PCVI but have’t played around with them at all. The PCVI and PCVII won’t display the power averages for both total time and total time that the cadence is greater than zero for an interval as was the case for the wired systems. I was told that the Garmin could be set up to do this. Apparently this change was made due to input from the Pro Tour guys and I’m one of the few that complained about it. The SRM set up software indicates that the capability is still there but it doesn’t work.
The garmin data fields are pretty flexible and can probably do that, i believe the next generation srm powercontrol will have customisable screens
Neil
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The Garmin does not transmit a slope back to the SRM PowerMeter. The head unit simply uses the slope to calculate and display power.