Acaia Lunar Product User Manuals & Instructions PDF

Thank you for choosing the Acaia Lunar 2021 Smart Espresso Scale. Whether you're a seasoned barista or a home coffee enthusiast, the Acaia Lunar 2021 is engineered to elevate your espresso brewing experience. This manual is designed to provide you with comprehensive guidance on utilizing the features and functionalities.

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Using Your Acaia Coffee Scale


The instructions in this operation manual apply to the Acaia Lunar. You have purchased a quality precision weighing scale that requires handling with care. Make sure to read through this operation manual prior to using the scale.


Calibrate your scale using a calibration weight of the appropriate tolerance (class F1 or F2). A scale can only be as accurate as the standard masses or weights used for calibration. For more details, please read Calibration Mode section in the operation manual.


Thank you for choosing one of our scales. The Acaia Lunar is designed and manufactured to the most rigorous standard to give you the best coffee brewing experience.

Next, follow the instructions in the Preparation and Installation sections in the manual to get started.

To take an advantage of its many features, carefully read through the operation manual containing step-by-step procedures, examples, and other information.

Battery Charge

• Charge the battery by plugging the USB cable to any power supply listed below:

• A computer USB port

• A 5V at 1A cell phone charger with a micro USB connector

• An automotive 5V cell phone charger with a USB port or a Micro USB cable

• It takes 1-2 hours to fully charge the battery. You can charge the battery more frequently so that it will never run out of charge.

• Battery percentage can be viewed in Acaia Apps.

• It is not recommended to let the battery run out completely before charging.

• *Please note: Using a “fast-charging” charging block or charging hub (a charging block/hub delivering over 5v at 1A) could damage your Acaia scale’s circuit board.


*To Enable/Disable Modes Please see Chapter 4: Configuration.

Mode 1 - Weighing Only Mode

Mode 2 - Dual Display Mode

Mode 3 - Timer Starts with Flow Mode ( ) - Droplet

Mode 4 - Auto-Tare Timer Starts with Flow Mode ( ) - Droplet and Square

Mode 5 - Auto-Tare Auto-Start Timer Mode ( ) - Triangle and Square

Mode 6 - Auto Tare Mode ( ) - Square

Status Icon

The following icons display on the right side of the LED display.

1. Droplet : When the scale detects the flow of espresso, the timer starts. The timer will stop when the flow stops. *Please note: The flow detection mode is designed to detect the flow of espresso. The timer may not trigger when attempting to pour from a kettle.

2. Triangle : The scale performs auto-tare operation when placing a stable weight on the Lunar, and simultaneously starts the timer.

3. Square : When placing a stable weight on the scale, the scale will perform the auto-tare Operation.


Acaia Corp
Acaia started with a simple goal: to combine design and technology in the specialty coffee community. To this end, the company's team of incredible innovators went to work developing high-performing hardware integrated with the latest software to optimize the most granular aspects of coffee creation. Committed to accuracy and exceptional build quality, Acaia has quickly become a leader in the industry. Shop Acaia's fantastic catalog here at Seattle Coffee Gear

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