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PostPosted: Sun Mar 25, 2012 10:35 am 
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Hi All

I've tried searching for a solution everywhere but to no avail. I'm using a Cannondale SiSL Compact SRM with a Garmin 500. It's under reporting by around 6% based on numerous Powertaps - maybe more.

Using the Garmin calibration screen I can get it to read a slope of 19.1. The sticker says 18.2 I believe. I cannot then modify the slope as I put in the digits and it says that the process has failed. There are three digits yet the Garmin 500 is running the latest firmware 2.80.

All in all a bit flummoxed as to how to get this thing reading correctly. Any help greatly appreciated.


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Posted: Sun Mar 25, 2012 10:35 am 


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PostPosted: Sun Mar 25, 2012 5:50 pm 
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Thanks for the PM's.

Finally found solutions on another forum so mods feel free to close or remove this.


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PostPosted: Mon Mar 26, 2012 12:19 am 
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Joined: Wed Dec 15, 2004 10:54 am
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Location: Melbourne, Australia
Or at least post the information here before it is locked so others can benefit?

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PostPosted: Mon Mar 26, 2012 1:53 am 
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Location: Canada
airwise wrote:
Thanks for the PM's.

Finally found solutions on another forum so mods feel free to close or remove this.


Way to use a forum? Thats selfish, share the good info with us all


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PostPosted: Mon Mar 26, 2012 12:50 pm 
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Location: Canada
You can always just borrow a mate's PC7!


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PostPosted: Mon Mar 26, 2012 6:07 pm 
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Location: Houston, Texas
airwise wrote:
I cannot then modify the slope as I put in the digits and it says that the process has failed. There are three digits yet the Garmin 500 is running the latest firmware 2.80.

My experience was that simply waking up the SRM was insufficient as I had to keep pedaling until the Garmin 500/800 indicated that the slope had been updated.

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Michael - The Anaerobic Threshold is neither...


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PostPosted: Mon Mar 26, 2012 8:49 pm 
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That's what I found Michael - along with having to move the Garmin around the bottom bracket area continuously until it finally managed to communicate. Odd.

Geoff. Might get a PC7 after this - I'm far from convinced of the reliability of the 500 particularly using GPS.


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PostPosted: Mon Mar 26, 2012 10:26 pm 
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Location: Houston, Texas
airwise wrote:
move the Garmin around the bottom bracket area continuously until it finally managed to communicate.


Our bikes are ISP and since I have spare mounts for the Garmin, I simply use the supplied o-rings/mount to secure the Garmin to the beam of my Park PR-21 stand. As for reliability, other than an occasional issue with the popup warning for multiple HR or power meters, mine has been very reliable and I while I do not have a SRM PC VII, I still prefer the Garmin 500 at nearly 1/3 of the price of a PC VII along with the ability to calibrate/update the slope when compared to the my PC VI.

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Michael - The Anaerobic Threshold is neither...


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PostPosted: Tue Mar 27, 2012 3:12 pm 
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Here's a funny story. Some people that I know who are paid to use the Garmin train with the PC7 in their pocket and download the data from that later...


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PostPosted: Tue Mar 27, 2012 5:06 pm 
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Location: Houston, Texas
I am guessing this has something to do with the fact that being a simpler device, the PCVII is somewhat easier to use in terms useability with no worries of it locking up or droping/losing power data which has been an issue for some with the Garmin devices.

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Michael - The Anaerobic Threshold is neither...


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PostPosted: Wed Mar 28, 2012 6:39 am 
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Location: Aarhus, Denmark
ms6073 wrote:
I am guessing this has something to do with the fact that being a simpler device, the PCVII is somewhat easier to use in terms useability with no worries of it locking up or droping/losing power data which has been an issue for some with the Garmin devices.


Not with mine (after 2 years of use).

Just sold my PC7: I am sticking to my edge 500: It really bothers me that you cannot setup the screens on the PC like you want to...


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Posted: Wed Mar 28, 2012 6:39 am 


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