Thank you for purchasing through links and ads on this site.
diglloyd Deal Finder...
Buy other stuff at
Memory Deals, Thunderbolt Drives, Performance Upgrades, and More
Organic Lab Tested Full Spectrum CBD
20% off with coupon code diglloyd20 at

100% organic non-GMO, no additives or preservatives.
Legal in all 50 states

Bugs in SRM Hardware or Software

Last updated 2012-03-21 - Send Feedback
Related: Power Meter, Road Bikes, SRM

This page discusses bugs with the SRM software or hardware.

No clipping of heart rate

Occasionally, there are heart-rate problems with bad data— it’s unclear if the heart rate strap is sending bad data from static electricity (e.g. jersey flapping in the wind), or actual electromagnetic interference to the signal.

But the software and hardware both have available the max heart-rate, and this value should be used to clip any heart rate values that exceed the max to some reasonable value, preferably one interpolated from the last known-good values.

Inaccurate temperature

If the SRM Power Control 7 head unit is in the sun, it will often read 10-15° F too high, maybe more. Even in the shade or at room temperature on my desk, it often reads 4° F or so too high.

Since altitude is temperature compensated, this results in inaccurate altitude readings, a problem if one starts in the sun and then enters shade, or vice versa.

To be fair, the Garmin Edge 500 has similar and worse problems in my experience. Maybe it is a hardware issue that is not easily fixed.

OWC Easy SSD Upgrade Guide
MacBook Pro and MacBook Air
iMac, Mac Pro, MacMini, more!


Abort should be changed to Cancel (and make the escape key work too). While Abort is a small idiosyncracy, it makes the SRM software look that much more amateurish.

Abort is not appropriate terminology for Cancel

See also Nikon wishlist
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 6 hours unless noted. Certain deals may last longer.
$3199 SAVE $200 = 5.0% $99 FREE ITEMS Canon EOS R Mirrorless with 24-105mm in Cameras: Mirrorless
$1632 SAVE $700 = 28.0% $165 GIFT CARD LG C8PUA 55" Class HDR UHD Smart OLED TV in Electronics: Televisions
$3097 SAVE $200 = 6.0% $77 FREE ITEMS Nikon D850 DSLR in Cameras: DSLR
$1797 SAVE $200 = 10.0% Pentax K-1 Mark II DSLR in Cameras: DSLR
$998 SAVE $400 = 28.0% Sony a7 II Mirrorless in Cameras: Mirrorless
$1798 SAVE $200 = 10.0% Sony a7R II Mirrorless in Cameras: Mirrorless
$3998 SAVE $500 = 11.0% Sony a9 Mirrorless in Cameras: Mirrorless
$5987 SAVE $1839 = 23.0% ZEISS Loxia 5-Lens Bundle in Lenses: Mirrorless
$11594 SAVE $3157 = 21.0% ZEISS Otus ZF.2 3-Lens Bundle in Lenses: DSLR | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__