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Customize your chart to closely analyze roasting curves

Jason Jin
March 18, 2024
min read
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Firescope users frequently ask, "Why does the curve recorded by my roaster look different from others?"

The main reason is due to the differences in the specifications of the roasters. If the options such as the size of your roaster's drum, the material of the drum, the placement of temperature probes, and the thickness of the probes differ, these factors will affect the shape of your roasting curve.

However, a second reason is due to the difference in the range between the recorded roasting curves and the temperature curve charts displayed in the app. Misinterpreting your roasting curve due to different chart ranges can lead to incorrect insights. According to our data, many people are unaware of the need to properly set up their charts and how.

Let's explore how to change chart settings in Firescope and analyze roasting curves more accurately.

How to Set the Chart Range

First, take a look at this record. This roast was done with a smaller batch size, resulting in a smaller difference between the charge temperature and the turning point temperature. These factors resulted in a lower maximum Rate of Rise (RoR) compared to others. It is harder to read the signals coming from the RoR curve in this case.

Then, let me show you a before and after of correctly setting the chart. You can also modify your roasting curve settings to make similar adjustments.

Entering the chart settings window is very easy. Click the three vertical dots in the upper right corner, and press "Chart settings".

In this panel, there are many options, but we will focus on the Axis settings shown at the bottom. Scroll down a bit in the settings window, you'll find three Axis sections. Check the title of each section in the image below to see which Axis it corresponds to.

Let's return to the temperature curve and determine the range of temperature and RoR we aim to set. In Firescope, you can easily see the temperature, time, and RoR at the position of the mouse on the chart, with the crosshair feature.

Based on the temperature range we've determined, set it as shown in the captured image. Then, click "Apply" at the very bottom. Now, you will see the range of the chart has changed, allowing you to view the curve more prominently. This makes it easier to analyze.

Making the RoR Curve Smoother

Next, let's learn how to smooth the RoR in the chart settings. If you're not familiar with the concept of RoR, please read this article first. How to make the RoR smoother is simple. You need to check the “Make RoR curves smooth” option in the chart settings panel.

Applying the RoR smooth feature reduces the noise values seen in the RoR curve, allowing for a smoother shape to be observed.

Using this feature can make the RoR easier to read, especially for roasters that do not display decimal places for temperature. However, it means that the RoR calculation becomes less sensitive to changes in roasting temperature. Therefore, this is not recommended for roasters who rely on interpreting signals from the RoR.

Quickly Reload the Chart Without Resetting

Lastly, I want to introduce the feature of saving and loading chart settings. This feature allows you to save settings for each setup and change them with just one click. When adjusting chart settings, click the three dots button next to Apply, then press Save with the name of it. Then, under Saved Settings in the menu, you'll find your saved preset, and clicking on it will immediately change the chart's settings. This feature is especially useful if you have multiple roasting machines or if you roast with profiles that have drastically different temperature curves.

Customize Your Chart and Analyze Easily

As you've read in this article, Firescope allows you to easily adjust chart settings to analyze your roasting in greater detail. Beyond this, Firescope offers various other features for roasters.

Explore the main page of Firescope or download the app to try it out for yourself!

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Jason Jin
Firescope Co-founder

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