Hammerhead Heart Rate - Inconsistencies

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Eduardo Ramos

• July 25, 2022 14:16

I have been using Hammerhead HR ever since I have a Karoo 2. At first all was good but for about 5 or 6 updates the data displayed in the head unit is inconsistent. The data in the end of the ride looks good though. 
What happens in practice is that the data field jumps from 140 to 170 after a huge delay. Or sometimes the data stays fixed at 90 and then suddenly changes to whatever HR I have and goes nicely from that point onwards. 
Important note: I changed the battery less than 1 month ago.

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  Michiel

  • July 25, 2022 17:44

  Did you ever clean the heartrate band? You can simply wash it in the wash machine at low temperatures, for example together with your cycling gear.

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  Richard Soltes

  • July 25, 2022 20:26

  I haven't tested the HH version , but the consumer level HRM are not consistent in their display , measurement or errors.

  They CAN be decent as general monitors but neither the Polar , Wahoo, apple or Garmins are better than on target 60% of the time

  It may do with how they calculate or the intervals they use.

  I use measured pulse and evengot a chance to calibrate with a medical grade "Holter"

  Was not impressed.. Not unexpected for a $50-125  item to not be comparable to FDA approved ones or those that cost x many $K.  Many find them useful. Me not so much

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  Eduardo Ramos

  • July 27, 2022 07:59

  @Michiel I wash it after every workout and machine wash every week or so.
  @Richard thank you. I was not aware of such limitations in this devices. I was convinced that in the past it was much more reliable than it is nowadays.

  To the Hammerhead developers, is there any updates to the HRM? And if yes, how do one perform such?

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  Johnny Pugh

  • July 27, 2022 12:17

  It's possible that your Heart Rate strap is worn out and needs replaced. I usually replace mine when Heart Rate readings become erratic and a new strap always fixes it. Here is an article on maintaining your strap. https://support.hammerhead.io/hc/en-us/articles/6267814180635-Hammerhead-Heart-Rate-Strap-Washing-guide

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  Eduardo Ramos

  • July 27, 2022 12:55

  Thanks Johnny! I have it only for 1,5 year and have always followed the recommended washing procedure. Maybe I will raise a ticket.

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  Naran Reitman

  • September 12, 2022 04:34

  I'm having the same problem.  Did you ever follow up with HH?  If so, what result?

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  Eduardo Ramos

  • September 12, 2022 13:22

  Hey Naran.

  I have submitted a ticket for support and after some investigations I had my chest strap replaced. 

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  Naran Reitman

  • September 12, 2022 15:39

  Thanks for the response.

  Did that solve the issues?

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  Michael Vega

  • December 19, 2022 00:51

  I experienced the same issues and after trying the following, it started working for me: With a q-tip and rubbing alcohol, swab out the receivers on the chest strap where the posts on the sensor snap in. Really get in there to wipe them clean. Hope this helps you as well.

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