Temperature is way off
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The temperature reading on my Karoo 2 is at least 4-5 degrees Celsius too low. Am I alone here? An indication like: hot, cold, nice is as accurate as my device. Stange that the basic functions like speed, distance and temperature are so hard to cover.
Oh, and the auto update function that was fixed is still broken.
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I have several electronic thermometers around my house in things like my thermostat, indoor/outdoor units, and digital clocks - none of them agree, ever. I've given up trying to determine which is "right". My Karoo 2 isn't terribly far off from any of them.
As for my Karoo 2, I trust the temps more than I did with my old Garmin 520, Bolt, and Bolt V2. I haven't yet looked down and thought, "What... That can't be right" like I did so often with my prior units.
And while I think my Karoo temp is accurate (enough), I also think it would make sense to add a user defined temperature offset to + or - a number of degrees to the temperature reading.
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I think I posted this earlier in the thread, but my K2 has been fairly “accurate” for some time now. Getting a gizmo to read temps accurately under different weather conditions and heat reflection from pavement is a daunting task. I’m pretty amazed that mine does as well as it does.
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I have recently purchased a K2 and it has been consistently reading about 5-6 C too low. This has been on cold rides where the ambient temp is about 8C and its reading 2C and warmer rides where it is 16C and reading about 10C. I don't expect it to be 100% accurate but this is the least accurate head unit i have owned for temp compared to Garmin and Wahoo units.
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On a ride today my K2 was showing 3C. An accurate thermometer at home was showing 8C, so (as others have noted) about 5C too low on the K2. It will be interesting to see what readings I get in summer. As an aside, the electronics inside the case will generate some heat, so it's always going to be tricky to calibrate.
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It was 8C outside temperature and my Karoo was showing 3C outside. I thought that wind chill doesn't affect inanimate objects — it affects humans because it carries away heat from the body, making it seem colder. With no wind you get a temperature gradient around the body, but the wind removes this by blowing the warmer layer of air away. An inanimate object will cool down to the ambient air temperature but will then not go any lower.
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Today, I decided to try a controlled experiment. I compared an accurate thermometer with the temperature shown by my Hammerhead at temperatures between 5C and 24C. The HH consistently reads 3C below the thermometer. It seems to me that a solution would be for Hammerhead to introduce an option in settings for users to calibrate the thermometer. For example, in my case, because the difference seems constant, I would "calibrate" by telling it to add 3 degrees centigrade. If the difference is not constant then a more elaborate procedure would be necessary, such as entering multiple readings from a trusted thermometer and the corresponding HH readings. However, most of the reports I've seen imply that the difference is more or less constant. This problem seems sufficiently widespread that one would hope that Hammerhead would fix this.
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My firts K2 was showing 3-5C too low during all seasons (for a whole year).
This week I got a replacement (a brand new unit from a different batch). The result is the same: today it was +1C, whilst my K2 was showing -3C. I compared with a few other home equipments, which were accurate and very close to +1C. I give up... -
I started this thread a year ago. I sold my Karoo and now use my phone as a bike computer. Also not perfect but I use a device I already use every day. And it's better for navigating although I liked the Karoo as a navigating device. But when it's nog capable of getting the speed and the temperature accurate, why bother at all. It's sad that HH doesn't turn out te be the new kid on the block, competing with Garmin in a proper way. The fix for both speed and temperature shouldn't be that difficult so my conclusion is that they don't care and me decision to sell the unit was the right one.
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How accurate does the temp have to be, my K2 temp seems to be within a couple degrees which is totally fine when you are flying down the road or trail on your bike. Does it really matter if the temp is off by a couple degrees?? What I would like to see is the temp reading change faster, it takes several minutes for the temp reach the actual temp outside. When descending I like to see how damn cold it is before I get to the bottom of the descent.
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@Gerry Stephenson Good question. But than again, why buy a unit like this at all. Unless you are a pro you don't need to know the temperature, speed, average speed, cadans etc. Only the route is important and your phone is better in this area than a cycling computer. I think if a company charges a premium price for a unit like this the least you can expect to give accurate data. And 1 degree is not a high degree of accuracy. I wouldn't ask for 0.1 degree accuracy. But for me 4 degrees is as good as no measurement at all.
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Frankly, I dobt. HH responded to me a few months ago, but it sounds like "bla, bla bla", that temp measurement is so complex and so on...
I've suggested them adding an option for manual calibration, which they found valuable, but I doubt again this will be ever implemented.
They claim there are too less complaints on this problem. For me it sounds like an ignorance. -
Different country, different temperature range, same old problem - K2 saying average temperature 21 deg C when actual temperature during the ride was between 26 and 24. How many users have to have the exact same problem with their units for Hammerhead to do something about it !?. Even a temporary fix such as a user manual offset option would be better than nothing. Disappointing that this has been ignored for so long.
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