Calibration of Coffee Grinders and Espresso Machines

Providing delicious coffee is a top priority for baristas and coffee businesses, as well as coffee lovers. A good coffee experience depends not only on quality beans, but also on the use of correct equipment and meticulous calibration. At Imesta Coffee, we emphasize the importance of calibrating your coffee grinders and espresso machines to ensure sustainable service and consistent taste.

What is Calibration Adjustment?

Calibration, in its general sense, means "adjustment." In coffee equipment, calibration involves adjusting the coffee grind level, the amount of coffee entering the portafilter, and the espresso brewing time to ideal values. This adjustment is essential for achieving consistent quality and flavor in every cup.

How to Adjust Calibration?

1. Check the Portafilter Coffee Weight

Portafilters used in espresso machines typically hold 14 or 18 grams of coffee. The first step in calibration is to ensure the correct amount of coffee is placed in the portafilter.

• Our recommendation: Weigh the full portafilter with a precision coffee scale at least once a day. This way, you can detect any fluctuations early.

2. Determine the Grinding Degree

If your portafilter is making the right amount of coffee, you should check the grind. When you insert the portafilter into the espresso machine, it should take 3–5 seconds for the water to start brewing.

• If the brewing start time is less than 3 seconds, the grind is too coarse .

• If it takes longer than 7 seconds, the grind is too fine .

Try to achieve the 3-5 second range by making the grind setting slightly finer or coarser.

3. Measure Espresso Brewing Time and Amount

In a double outlet portafilter, the ideal brewing time should be 25-30 seconds and the amount of espresso obtained should be between 50-60 ml.

• If the brewing time is over 30 seconds or 50-60 ml is obtained in under 25 seconds, the grind is too fine.

• In this case, try to achieve the ideal process by gradually changing the grinding setting.

Side Factors to Consider in Calibration

To ensure accurate calibration, you should also consider the following factors:

• Mains water pressure and fluctuations

• Capacity and quality of the water treatment system

• The diameter of the hose that supplies water to the espresso machine

• Regular maintenance and cleaning of the machine

• Machine quality and performance

• The oil and moisture content of the coffee bean, its roasting profile and freshness

• Quality of mill blades and motor power

These elements directly affect cup quality, regardless of how accurate the grind setting is.

Calibration Tips from Imesta Coffee

We recommend that you make calibration a routine and follow it daily, especially during busy work schedules. This way, you can always provide your customers with standard, fresh coffee.

Choosing the right coffee beans and roasting profile are as crucial as calibrating your coffee equipment to create the perfect cup. With the Espresso Blend series, part of Imesta Coffee's carefully selected product range, you can achieve high-quality, consistent results.

Conclusion

Calibration is a critical step in maintaining flavor and standards for both professional coffee businesses and coffee enthusiasts. At Imesta Coffee, we're ready to support you on this journey. Remember, with proper calibration, every cup is the most beautiful reflection of your brand and your hard work.