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Temperature updates too rapidly

finepl

The Garmin Edge 1040 updates the temperature every second.  Very distracting.  Is there any way to slow down the updates and remove the decimal readings in temperature?  

I understand that the unit still takes a long time to reflect the change from outdoor to indoor temperatures as well.  That seems to be a function of the thermal mass and thermal content of the Edge 1040, not how frequently the display updates.

If Garmin is unable to fix the temperature update frequency, has anyone published an data field in Connect IQ like Sensible Gradient that can allow the user to change the update frequency?

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    I think that temperature sensor is not for user info but for internal barometric pressure temperature compensation(for baro altimeter), thats why it have  frequent update time.

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    the 1040 is supporting the garmin temperature sensor and i use this sensor since the 1040 with succes, i place the sensor under my saddle

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    owner's manual link:

    The device may display temperature readings that are higher than the actual air temperature if the device is placed in direct sunlight, held in your hand, or is charging with an external battery pack. Also, the device will take some time to adjust to significant changes in temperature.
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    I, for one, want the temperatures logged in the fit file with one extra digit (0.1C) every second.
    Maybe for those who prefer, they can create a "temperature" and a "1min avg temperature" data field, so everyone can be happy.

    I tested my edge 1000 and 1040 in a thermal chamber, against Pt100 sensors, and *my* 1040 is faster to respond and more accurate than *my* 1000. 

    Edge 1000:  -3C error, tau 6.25 min (time to reach 63% of step change)
    Edge 1040:  +1C error, tau 4.23 min

    This was done on forced air controlled temperature chamber and compared to calibrated class AA Pt100 RTD sensors.

    They can certainly still improve response time (so every ride doesn't take 15min to go from indoor to outdoor temperatures), accuracy (for a $600 device expectations are higher), resolution (sensor likely has better resolution, or dithering can be employed, or at least low pass filter in transitions) and pickup point (insulate it from device, couple better to ambient air, eliminate 'sun on black device'  effect).  I offer to help, if they read this.

    That said, it was improved from *my* 1000, and 1 degree temperature error and resolution will not detract from my enjoyment of biking. Not a gearhead (just a nerdy engineer).




  • 0 in reply to jrc_

    That's really interesting - thank you. What you've found for the 1040 tallies with my (far less scientific or controlled!) observations (comparing recordings with weather reports). Like you, I moved from a 1000, and my 1000 read low, albeit probably only by about 2C, so our four devices, at least, have all been fairly consistent. 

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