Smart sensor

Fatih Kale

Hi all,

Once again I have another issue with my smart sensor.

I sometimes see peaking in HR at the beginning of my runs. I know that the HR is wrong as I am going slow at the beginning but I read around 190 bpm. After first 4 5 mins readings get corrected and no issues are observed but first 5 mins mess all the metrics of the training.
I copied some screenshots below.

You can see that at the beginning I always see peaking but my HR should be around 130 bpm.

I always wet the belt before I start training.
I am soaking belt into water after every run.

link text

zadow

@Fatih-Kale Hi, well, there could be a billion reasons for that. You’d find around here tons of discussions why the hell the HR reading from Smart Sensor is like this and that. First of all, and most likely reason is, that your strap is dying. However, before you buy a new strap, replace battery in the Smart Sensor. If that won’t help, you probably need a new strap. However, there might be another reason, as I discovered just yesterday and mentioned here in different thread. Your Smart Sensor may be broken. It happened to me. I replaced three straps within one year due to wrong readings from the belt. I was so convinced that strap is guilty for bad readings that I was only replacing them and did not check the sensor. Anyway, at the end, I sent sensor to Suunto (via local Suunto store) and Suunto immediately gave me a new sensor with note, that the old one was defective.

Fatih Kale

@zadow thanks, belt or battery should not be dead yet I believe. I bought it 2 months ago. Life of belt should not be that short huh?

zadow

@Fatih-Kale well, keep washing the belt after each run, also don’t forget to wash sensor’s connectros after each use. You’ll prolong it’s lifetime. How long it will last then…hard to tell. One more thing came to my mind. I do not know, where you live, but in my location, is currently autumn and temperature is decreasing rapidly. It’s freezing in the mornings. Low temperature also affects HR reading from straps. So, if you put your belt on inside, then you go outside, where the temperature is really low, it may take few minutes to warm up the sensor again for proper readings.

Fatih Kale

@zadow that’s a lot of useful information thank you. I usually wear the belt inside and weather is usually 10 C low outside so this may explain why. Cheers

fleshymutant

@Fatih-Kale one more thing, especially in winter would be to also moisten your skin as well as the belt. The belt relies on conductivity so until you begin to perspire the conductivity of your skin is poor.

fejker

A friend of mine also gets these 200 bpm spikes at the start of activities … new watch, new belt, new sensor, wets the belt properly before start but the spikes at start are quite random. I myself have had some issues with the sensor, but mostly flatlines at the start of recording for a couple of minutes or occasional spikes over 200 bpm (which are an abnormality for me).

Darqu

I observe same things with sensor. Peaks, drop downs, no HR measurement randomly. I’ve got belt replaced by suunto service, worked well for a while but it happens again. Any update if it got fixed?

Also… How I can update firmware in smart sensor?

Cheers!

Brad_Olwin

@Darqu No firmware updates AFIAK, I am using the sensor I bought with an A3P, many years ago. The belts have had the contact area recently redesigned. If the area where the sensor attaches is black you have an older belt, the newer ones have a grey area where the sensor attaches. The newer belts should last a long time and are available at the Suunto store online.

A Former User

@Darqu said in Smart sensor:

I observe same things with sensor. Peaks, drop downs, no HR measurement randomly. I’ve got belt replaced by suunto service, worked well for a while but it happens again. Any update if it got fixed?

Also… How I can update firmware in smart sensor?

Cheers!

https://www.facebook.com/groups/SuuntoAmbit/permalink/2708821062543273

See if you can see the instructions

Darqu

@Brad_Olwin does new belt work with ‘old’ smart sensor? I will consider changing it.

@André-Faria sure, I see, tried that way but no option to check firmware update is visible.

Egika

@Darqu said in Smart sensor:

@Brad_Olwin does new belt work with ‘old’ smart sensor? I will consider changing it.

Yes, it does. And since the sensor itself has not changed, it is the only working combination

A Former User

I use this old topic to avoid creating a new one.
does the memory function of the suunto smart sensor also work with SA? it seems not…