Horizon MH-338 Digital Precision Scale User Manual

Product Overview

The Horizon MH-338 is a compact digital precision scale designed for accurate measurements up to 200 grams with a 0.01 gram increment. Its design resembles a computer mouse, offering a discreet and portable solution for various weighing needs.

Key Features:

• 200g Capacity with 0.01g Reading Increment
• High Accuracy and Reliability
• Multiple Weighing Modes (g, oz, ct, gn)
• Tare Function for Net Weight Measurement
• Automatic Power-Off Feature

Setup

1. Unpacking and Inspection

Carefully remove all components from the packaging. Inspect the scale for any signs of damage. The package should include the MH-338 scale, two AAA batteries, and this user manual.

Image: Contents of the Horizon MH-338 scale package, including the scale, batteries, and user manual.

2. Battery Installation

1. Locate the battery compartment on the underside of the scale.
2. Slide the battery compartment cover open.
3. Insert two AAA batteries, ensuring correct polarity (+/-).
4. Close the battery compartment cover securely.

Image: The underside of the Horizon MH-338 scale, illustrating the battery compartment for AAA battery installation.

3. Placement

Place the scale on a flat, stable, and vibration-free surface to ensure accurate readings. Avoid placing it near strong electromagnetic fields or extreme temperature changes.

Operation

1. Power On/Off

• To turn on the scale, press the [ON/OFF] button. The LCD display will illuminate and show "0.00g".
• To turn off the scale, press and hold the [ON/OFF] button for a few seconds until the display turns off. The scale also features an automatic power-off function after 90 seconds of inactivity to conserve battery life.

Image: A detailed view of the Horizon MH-338 scale's LCD display and the 'M' (Mode) and 'ON/OFF/T' (Tare/Power) buttons.

2. Unit Selection

Press the [M] (Mode) button to cycle through the available weighing units: grams (g), ounces (oz), carats (ct), and grains (gn). Select the desired unit before weighing.

3. Tare Function

The Tare function allows you to subtract the weight of a container, so you only measure the net weight of the contents.

1. Place an empty container on the weighing platform.
2. Wait for the display to stabilize, then press the [ON/OFF/T] button. The display will reset to "0.00g" (or the selected unit).
3. Add the items to be weighed into the container. The display will show the net weight of the items.

4. Weighing Procedure

1. Ensure the scale is on and displaying "0.00g" (or the selected unit).
2. Gently place the item(s) to be weighed onto the center of the stainless steel weighing platform.
3. Wait for the display to stabilize. The stable weight will be shown on the LCD.

Image: The Horizon MH-338 scale in use, demonstrating the weighing of fine powder in its lid and loose tea leaves on the platform.

Calibration

For optimal accuracy, periodic calibration may be required. Refer to the following general steps for calibration. A 200g calibration weight is typically used for this model.

1. Turn the scale ON and wait for it to display "0.00g".
2. Press and hold the [M] (Mode) button until "CAL" appears on the display, then release.
3. Press the [M] button again. The display will flash the required calibration weight (e.g., "200.00g").
4. Place the exact calibration weight (e.g., 200g) onto the center of the weighing platform.
5. The display will show "PASS" and then return to normal weighing mode, indicating successful calibration. Remove the weight.

Image: The Horizon MH-338 scale displaying "5.00g" with a small calibration weight placed on its stainless steel platform.

Maintenance

1. Cleaning

Wipe the scale with a slightly damp cloth. Do not use abrasive cleaners or immerse the scale in water. Keep the weighing platform clean and free of debris.

2. Storage

Store the scale in a clean, dry environment at room temperature. Avoid extreme temperatures, humidity, and direct sunlight. If storing for extended periods, remove the batteries to prevent leakage.

3. Battery Replacement

When the display shows a low battery indicator (e.g., "Lo"), replace both AAA batteries with new ones to ensure continued accurate operation.

Troubleshooting

• "Lo" or Low Battery Indicator: Replace the batteries with new AAA batteries.
• "OUE2" or "EEEE": Indicates overload. Remove the item from the platform immediately to prevent damage. The maximum capacity is 200g.
• Inaccurate Readings:
  • Ensure the scale is on a flat, stable surface.
  • Check for any obstructions under or around the platform.
  • Recalibrate the scale if necessary.
  • Ensure the ambient temperature is stable.
• Scale Does Not Turn On: Check battery installation and ensure batteries are new and correctly inserted.

Specifications

Warranty and Support

For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Horizon website. Keep your purchase receipt as proof of purchase.