Calibration is required when the set temperature is not reflected accurately in actual output of the tip (as measured with a tip thermometer). This means that there is a deviation of set temperature and actual tip temperature.
Why is there a difference?
When switching between different shapes of soldering tips, it is common for the actual tip temperature to deviate from the set temperature on the soldering station. This happens as the tip shape and size contributes to its thermal capacity, and a change in tip could affect the actual tip temperature due to the different thermal capacity of the tips.
A deviation in temperature can also be due to degradation or oxidation of the tip. Lack of proper tip maintenance and constant usage at high temperatures can cause the tip to oxidize quickly. This oxidation layer acts as a barrier to prevent the heat from "escaping" the tip, resulting in a lower actual temperature.
How to Perform Calibration?
To calibrate the tips such that the actual temperature matches the set temperature, you will first need a temperature measurement tool like the Hakko FG-100B or FG-101B.
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Measure the actual temperature of the tip at the current set temperature. If the set temperature and displayed temperature is different, calibration is required. Eg. Set Temperature is 350°C but actual temperature on the thermometer is 340°C |
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Press and Hold the rotary knob to enter Adjustment Mode. The display will show "Adj" |
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Push once to view set temperature (This will show the current set temperature of 350°C) |
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Turn the knob to the actual measured tip temperature (Turn from 350°C down to 340°C) |
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Once the display shows the actual measured tip temperature 340°C, push once to enter. Temperature will be corrected and measured temperature will match set temperature. |
Now, you have successfully calibrated your soldering station, what then?
It is important to do regular checks on the actual temperature with a thermometer, especially if you have recently changed your tip (regardless of size or shape), or solder very often, or at high temperatures. Such regular checks will allow for calibration when required, ensuring that your soldering station functions at its peak!