Early First Crack

Hi all, I’ve noticed recently that FC is happening around 182 deg instead of the typical 196deg earlier in the year. Nothing has changed other than the outside temp. I’ve only noticed this since the weather got colder and I assume that it’s related but wanted to verify. Also, would dropping the PH temp help this or best to heat the area around the Bullet? Thanks for any guidance. -Paul

Hi @pmahon1998.nTac,

Are you referring to the Bean Probe First Crack Temp? The Bean Temp is affected by the ambient temperature rather extensively in comparison to the IBTS Temp, especially during the first roast of the day. Could you provide the links to your roasts and more details about them?

Depending on your preference, you can either preheat the Bullet for a longer period, move the Bullet indoors, or raise the Preheat Temperature.

Best regards,
Kevin

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Sorry, I should have clarified. I was referring to the IBTS on the front of the Bullet R1 V2. Here is the link: (Log in | Roast.World)
You will note from the roast that the FC was 196, however, this the IBTS temp on the front (see attached jpeg) of the Bullet was showing 182ish

Looking at your roasts, to me it seems that it’s just a dirty sensor. When did you last clean your IBTS?

I’ve had the airflow sensor on my graphs lately, and it is nice to have to help triangulate sensor issues. that way if one sensor is acting up, you can verify if the other sensors are reacting. It’s a lot easier to confirm when a sensor is acting up if you have 3 sensors. With one or two sensors, it is less certain when something is an anomaly or an issue.

Oddly my IBTS sensor reads hotter when it gets dirty, but I have never let it get too dirty. when FC gets to 393F or above, I know it is time to clean the sensor. But that may be slight dirty, rather than completely dirty sort of phenomenon.

Yes @braca19452f9m . that was it! I took off the front panel and cleaned the IBTS and it seems to be back to normal. Thanks everyone. I realise that it may have seemed obvious to everyone else but I was worried that the cold temps were causing.
-Paul