Acaia Lunar User Manual

In the Box

Introduction

Thank you for choosing the Acaia Lunar scale. It is designed and manufactured to the highest standards for an optimal coffee brewing experience. Please verify that your Acaia Lunar box contains all the listed parts:

• Acaia Lunar Scale
• Heat Resistant Pad
• Micro USB Cable
• Acaia Calibration Weight 100 g

Follow the 'Getting Started' instructions to begin using your scale. For a full understanding of the Lunar's features, read this manual carefully, which includes step-by-step procedures and examples.

Warning: Improper handling of this product may result in personal injury or physical damage.

Scale overview

The scale features a Weighing Pan, Power button, Tare button, and an LED Display.

Note: For best performance, place the weight in the center of the weighing pan.

Getting Started

Placement

Select a stable, vibration-free work surface, preferably horizontal, for the weighing platform.

Power on/off

• Press the Power button [ ⏻ ] to turn on the scale.
• Double-tap the Power button [ ⏻ ] to turn off the scale.

Tare weight

Press the Tare button [ T ] to tare/zero the weight.

Switch mode

Press and hold the Power button [ ⏻ ] for 1 second to switch modes. Refer to the 'Mode Introduction' section for more details.

Product Care Information

Battery charge

Charge the battery using the provided USB cable with any of the following power supplies:

• A computer
• A USB wall-charger (5 volts, 1 amp output)
• A DC car-charger (5 volts, 1 amp output)

A full charge takes approximately 1-2 hours. Avoid letting the battery completely deplete before charging. It is best to charge the battery as needed, but not more than once a week. Battery percentage can be viewed via the Acaia apps.

Note: Using a fast-charging block or hub delivering over 5V at 1A may damage the Acaia scale's circuit board.

Calibration

Follow these steps for calibration:

1. Turn on scale: Turn on the Acaia scale.
2. Tap T button: Ensure the scale is in weighing mode and the unit is set to 'gram'. Tap the 'T' button rapidly.
3. See CAL display: Continue tapping the 'T' button until 'CAL' is shown on the display.
4. Place a weight: Place a 100 g, 500 g, or 1000 g weight on the scale. Wait until the display shows '_End_'. Calibration is now complete.

Mode Introduction

Mode 1 - Weighing Mode

In Weighing Mode, the scale displays only the weight in grams or ounces. A dot in the upper right of the LED display indicates ounces. The scale reads 0.000 when weighing in ounces.

• LED display shows [ 0.0 ] for grams.
• LED display shows [ 0.000 ] for ounces.
• Readability is 0.1 g or 0.002 oz. High resolution mode offers 0.01 g or 0.0005 oz readability.

Note: To change the weighing unit, refer to the 'Default Unit Setting' in the Configuration section (p.12).

Mode 2 - Dual Display Mode

In Dual Display Mode, the scale shows a timer (left) and weight (right) as [ 0:00 0.0 ].

• The scale supports grams and ounces.
• LED display shows [ 0:00 0.0 ] for grams.
• LED display shows [ 0:00 0.00 ] for ounces.
• If weight exceeds 2000.00 grams, the scale displays [ _ _ _ _ ].
• The maximum timer display is 9 minutes and 59 seconds.

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

The timer starts automatically when the scale detects the flow of espresso and stops when the flow ceases. This mode is designed for the slow trickle of espresso; it may not trigger when pouring from a kettle.

• LED display shows [ 0:00 0.0 ] (timer:weight) in grams.
• LED display shows [ 0:00 0.000 ] (timer:weight) in ounces.
• The timer ranges from [ 0:00 ] to [ 9:59 ].

Mode Description: The timer starts with espresso flow and stops when the flow stops.

1. The droplet icon [?] indicates Timer Starts With Flow Mode.
2. Placing a container on the scale displays its weight.
3. Tare the weight manually.
4. The timer starts when espresso flow is detected.

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

This mode is for baristas measuring shot time from the first espresso drops. When a stable weight is detected, the scale auto-tares. The timer starts upon detecting espresso flow and stops when the flow ceases.

• LED display shows [ 0:00 0.0 ] (timer:weight) in grams.
• LED display shows [ 0:00 0.000 ] (timer:weight) in ounces.
• The timer ranges from [ 0:00 ] to [ 9:59 ].

Mode Description: Auto-tare operates with a stable weight. The timer starts automatically with espresso flow.

1. This mode measures shot time from the first espresso drops.
2. Place a stable weight on the scale.
3. The scale performs the auto-tare function.
4. The timer starts when espresso flow is detected.

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

This mode measures the total shot time, including pre-infusion. After placing a stable weight (e.g., a cup), the scale auto-tares and starts the timer.

• LED display shows [ 0:00 0.0 ] (timer:weight) in grams.
• LED display shows [ 0:00 0.000 ] (timer:weight) in ounces.
• The timer ranges from [ 0:00 ] to [ 9:59 ].

Mode Description: The scale auto-tares upon detecting a stable weight, then starts the timer. The timer stops when espresso flow ceases.

1. This mode measures total shot time, including pre-infusion.
2. After placing a stable weight, the scale auto-tares and starts the timer.
3. Measure the total shot time, including pre-infusion.
4. The timer stops when espresso flow ceases.

Mode 6 - Auto-Tare Mode (■) - Square

In this mode, the scale performs auto-tare without automatically starting the timer. Place a cup on the scale for auto-tare. Pull the espresso shot as usual. When the cup is removed, the display shows the final beverage weight and the tare weight of the cup. The weight resets after 30 seconds. This reset time can be adjusted in the Configuration section under the [ Auto_rES ] setting.

• LED display shows [ 0.0 ] for grams.
• LED display shows [ 0.000 ] for ounces.

Mode Description: The scale performs auto-tare upon detecting a stable weight. The weight resets after 30 seconds.

1. In this mode, the scale auto-tares without starting the timer.
2. Place a stable weight on the scale.
3. Place the cup on the scale; auto-tare will be performed.
4. The weight resets after 30 seconds.

Note: In all three Auto Start Modes, the timer stops when espresso flow stops.

Note: In all Auto Start Modes, if the scale is inactive for 30 seconds, it resets the timer and performs a tare operation.

Note: In all Auto Start Modes, the timer stops when a negative weight (cup removal) is detected.

Note: The scale displays the previous stable weight, which is the coffee weight of the shot, when the cup is unloaded.

Configuration

Enter settings

1. Press and hold the Power button [ ⏻ ] while the LED display shows [ : ACAI A ], then it changes to [ SEt ].
2. Tap the Tare button [ T ] to enter Settings. The first setting is [ SLEEP ].
3. Refer to the following table for key operations:

Settings Menu

Sleep Timer Setting [SLEEP ]

1. Sleep Timer settings can also be configured in the Acaia apps.
2. The number indicates the time before the scale automatically powers off. For example, when 10 is selected, the scale powers off after 10 minutes of idle time if disconnected from mobile devices.

Zero Tracking Setting [trAcE]

1. Zero Tracking automatically maintains the zero indication within set limits.
2. OFF: Disabling Zero Tracking is not recommended as the zero indication can drift with temperature changes.
3. 0.5 d ~ 3 d: For standard resolution, each division is 0.1 g; 3 d = 0.3 g. With Zero Tracking set to 3 d, initial weights between ± 0.3 g on the weighing pan are gradually zeroed out.
4. 2 d is recommended for the Acaia Lunar.

Key Sound Setting [bEEP ]

1. Key Sound settings can also be configured in the Acaia apps.
2. Enable or disable the beeping sound using this function.

Zero Range Setting [ O.rAnGE]

1. The Zero Range setting determines the range for which the tare button executes zero operation instead of tare.
2. When Zero Range is set to 2, the zero-setting range is 2% of capacity (± 40 g for Acaia Lunar). Weights within ± 40 g are zeroed out; weights outside this range are tared.
3. If Zero Range is set to 100, the zero-setting range is 100% of capacity (± 2 kg for Acaia Lunar). Zero operation is executed for any tare button press within this range.

Notice: Zero operation ignores weight and displays 0, while tare operation deducts weight from the result. Zero operation does not increase scale capacity.

Weighing Filter Setting [Filt.]

1. The Weighing Filter Setting determines the response speed to weight and the weighing value. A larger number provides a more stable but slower result. The LED display shows the current filter setting.
2. Press the Tare button to change the parameter.

Default Unit Setting [ Unit]

1. The Default Weighing Unit is set to grams if [ g ] is selected and ounces if [ oz ] is selected.

Weighing Resolution Setting [rESOL]

1. The default Weighing Resolution is set to [ dEFAUL ], with a division of 0.1 g / 0.002 oz.
2. Tap the Tare button to switch between [ DEFAUL ] and [ hi Gh ] resolution.
3. In high resolution, the division is 0.01 g / 0.0005 oz. The default display shows [ 0.00 ] for grams and [ 0.0000 ] for ounces in Weighing Mode.

Note: With high Weighing Resolution, the default display in Dual Display Mode and Auto Start Modes shows [ 0:00 0.00 ].

Weighing Only Mode Setting [NODE_1]

1. The default Weighing Only Mode Setting is ON, enabling this mode.
2. ON: Weighing Mode is enabled.
3. OFF: Weighing Mode is disabled.

Dual Display Mode Setting [NodE_2]

1. By default, Dual Display Mode Setting is ON, enabling this mode.
2. ON: Dual Display Mode is enabled.
3. OFF: Dual Display Mode is disabled.

Timer Starts with Flow Mode ? Setting [NodE_3]

1. By default, Timer Starts with Flow Mode with Droplet Setting is ON, enabling this mode.
2. ON: Timer Starts with Flow Mode with Droplet is enabled.
3. OFF: Timer Starts with Flow Mode with Droplet is disabled.

Auto-Tare Timer Starts with Flow Mode ?■ Setting [NodE_4]

1. The default Auto-Tare Timer Starts with Flow Mode with Droplet and Square Setting is ON, enabling this mode.
2. ON: Auto-Tare Timer Starts with Flow Mode with Droplet and Square is enabled.
3. OFF: Auto-Tare Timer Starts with Flow Mode with Droplet and Square is disabled.

Auto-Tare Auto-Start Timer Mode ▲■ Setting [NodE_5]

1. The default Auto-Tare Auto-Start Timer Mode with Triangle and Square Setting is ON, enabling this mode.
2. ON: Auto-Tare Auto-Start Timer Mode with Triangle and Square is enabled.
3. OFF: Auto-Tare Auto-Start Timer Mode with Triangle and Square is disabled.

Auto-Tare Mode ■ Setting [NodE_6]

1. The default Auto-Tare Mode with Square Setting is ON, enabling this mode.
2. ON: Auto-Tare Mode with Square is enabled.
3. OFF: Auto-Tare Mode with Square is disabled.

Bluetooth Setup Setting [bt_SEt ]

1. OFF: Bluetooth is disabled. No Bluetooth connection is allowed.
2. ON: Bluetooth is enabled. The scale allows Bluetooth connection to Acaia apps.

Battery Saving [bAtt SAvE]

1. Save up to 20% battery by dimming the display after a period of inactivity. Brightness returns to normal when objects are detected on the scale.
2. The number indicates the time before the scale enters battery saving mode.
3. Tap the Tare button to cycle through options.

Pre-Infusion Time Out [PrE_inFu ]

1. Determines when the scale times out in all three Auto-Start modes. This setting is useful for long pre-infusion times and resolves timeouts that occur with slow pre-infusion.
2. The number indicates the time in seconds before the scale resets if no espresso flow or weight is detected.

Auto-Start Sensitivity [ SENSE ]

1. Minimum weight is decreased for enhanced sensitivity, ideal for slower espresso shots in droplet icon modes. Stability depends on environmental noise. Previous firmware initiated the timer at approximately 0.6 g into an espresso shot.
2. The number indicates the sensitivity of flow detection in droplet icon modes. Smaller values mean higher sensitivity but are recommended only for stable environments.

Auto-Reset [Auto_rES]

1. After a cup is removed, the timer automatically resets. This allows users to pull successive espresso shots quickly in the three Auto-Start modes.
2. The number indicates the timeout value for timer reset after a cup is removed.

Reset To Default Setting [ rESEt.d]

1. Select [ YES ] to reset all settings to their default values.
2. Press and hold the Tare button for 1 second until [ SLEEP ] is shown on the LED to reset all settings to default.

Appendix

Buttons

LED Indicators

The scale has several LED indicators:

• Battery Charge [⚡]: The orange indicator on the upper left turns on when charging and off when fully charged. Flashing or no light may indicate USB cable issues.
• Tare Operation / Bluetooth Connected [⏻]: The orange indicator on the lower left turns on when the Tare button is pressed.
• Ounce Indicator [⚖️]: The orange indicator on the upper right turns on when the weighing unit is in ounces.
• Timer Starts with Flow ?: When the scale detects espresso flow, the timer starts and stops when the flow ceases. (Note: Flow detection is for espresso; it may not trigger for kettle pouring.)
• Timer Starts with Tare ▲: The scale performs auto-tare and starts the timer simultaneously when a stable weight is placed on the weighing pan.
• Auto-tare Operation ■: The scale performs auto-tare when a stable weight is placed on the weighing pan.

Error Codes

Other

Specifications