GOYOJO Digital Gram Scale GY20002 Instruction Manual

Introduction

This manual provides instructions for the proper setup, operation, and maintenance of your GOYOJO GY20002 Digital Gram Scale. This high-precision analytical balance is designed for accurate weighing in various applications, including laboratory work, pharmaceutical research, and educational settings. It features a durable stainless steel weighing plate and an ABS housing for longevity.

Image: The GOYOJO GY20002 Digital Gram Scale, showing its compact design and LED display.

Setup

1. Unpacking: Carefully remove the scale from its packaging. Inspect for any damage. Retain packaging for future transport or storage.
2. Placement: Place the scale on a stable, level surface, away from vibrations, drafts, and direct sunlight. Ensure the surface is clean and dry.
3. Power Connection: Connect the provided power adapter to the scale's power input and then to a suitable electrical outlet.
4. Initial Power On: Press the ON/OFF button to turn on the scale. Allow a few moments for the display to stabilize and show "0.00g".
5. Calibration: For optimal accuracy, it is recommended to calibrate the scale before first use and periodically thereafter. This model requires an external calibration weight (not included). Refer to the "Calibration" section under "Operating Instructions" for detailed steps.

Operating Instructions

1. Power On/Off

Press the ON/OFF button located on the front panel to turn the scale on or off. The display will show "0.00g" when ready for use.

2. Unit Switching

The scale supports multiple weighing units. Press the UNIT button to cycle through available units: grams (g), carats (ct), ounces (oz), and pounds (lb).

Image: The scale's LED display cycling through different measurement units (grams, carats, ounces, pounds).

3. Tare Function

The tare function allows you to subtract the weight of a container, providing the net weight of the item being measured.

1. Place an empty container on the weighing plate.
2. Wait for the display to stabilize and show the container's weight.
3. Press the TARE/CAL button. The display will reset to "0.00g".
4. Add the items you wish to weigh into the container. The display will now show only the net weight of the items.

Image: A visual guide demonstrating the tare function, showing an empty container, pressing the TARE/CAL button, and then weighing an object within the container.

4. Piece Counting Function

This function allows you to count a large number of small, uniformly weighted items.

1. Ensure the scale is on and displaying "0.00g".
2. Press the PCS button. The display may show a sample size (e.g., "10 PCS").
3. Place the specified number of sample items (e.g., 10 pieces) on the weighing plate.
4. Press the PCS button again to confirm the sample. The scale is now calibrated for counting.
5. Add the bulk of the items to be counted. The display will show the total count.

Note: For accurate piece counting, ensure every sample object has a consistent weight (individual differences must be within 5%).

Image: The scale displaying a count of "10" with several screws on the weighing plate, illustrating the piece counting function.

5. Percentage Conversion

The scale can perform percentage conversions, providing a high level of accuracy and precision in representing weight measurements for experiments or formulations.

Image: The scale displaying "80%" with two laboratory beakers, one containing liquid, demonstrating the percentage conversion feature.

Note: Specific button presses for percentage conversion are not explicitly detailed in the provided information. This function is typically accessed through a mode button or a combination of button presses. Refer to the full product manual for detailed instructions on activating and using percentage conversion.

6. Calibration

To ensure continued accuracy, periodic calibration is recommended. This scale requires an external calibration weight (not included).

1. With the scale turned off, press and hold the TARE/CAL button, then press the ON/OFF button simultaneously. Release both buttons when the display shows "CAL".
2. The display will then show the required calibration weight (e.g., "2000g").
3. Carefully place the specified calibration weight onto the center of the weighing plate.
4. Wait for the display to stabilize and show "PASS" or return to normal weighing mode. This indicates successful calibration.
5. Remove the calibration weight.

Note: Always use a high-quality, certified calibration weight for best results.

7. Overload Indicator

If the weight on the scale exceeds its maximum capacity (2000g for GY20002), the display will show an overload indicator (e.g., "EEEE" or "O-L"). Immediately remove the excess weight to prevent damage to the scale.

Maintenance

• Cleaning: Wipe the scale's surface and weighing plate with a soft, damp cloth. Do not use abrasive cleaners, solvents, or immerse the scale in water.
• Storage: When not in use for extended periods, store the scale in a clean, dry, and stable environment. Avoid extreme temperatures and humidity.
• Handling: Handle the scale with care. Avoid dropping it or subjecting it to sudden shocks, as this can affect its accuracy and internal components.

Troubleshooting

Specifications

• Model: GY20002
• Readability: 0.01g
• Maximum Capacity: 2000g (2kg)
• Weighing Units: Grams (g), Carats (ct), Ounces (oz), Pounds (lb)
• Tare Function: Yes
• Piece Counting Function: Yes
• Display Type: LED
• Weighing Plate Material: Stainless Steel
• Housing Material: ABS
• Calibration: External calibration weight required (not included)
• Approximate Dimensions (L x W x H): 22.5 cm x 15.7 cm x 21.9 cm (8.85 in x 6.18 in x 8.66 in)

Image: The GOYOJO GY20002 Digital Gram Scale with key dimensions indicated in centimeters and inches, along with a table of product specifications.

Warranty and Support

Specific warranty details and direct support contact information are not provided in this document. Please refer to your purchase documentation or contact the retailer for warranty claims and technical support inquiries.