Eosphorus Science Digital Scale Lab Analytical Balance SF-460 B User Manual

1. Introduction

Thank you for choosing the Eosphorus Science Digital Scale Lab Analytical Balance, Model SF-460 B. This precision weighing device is designed for accurate mass measurements in various settings, including laboratories, educational institutions, and for jewelry or chemistry applications. This manual provides essential information for the proper setup, operation, and maintenance of your scale to ensure optimal performance and longevity.

2. Safety Information

• Place the scale on a stable, level surface away from vibrations, drafts, and direct sunlight.
• Avoid placing the scale near strong electromagnetic fields or heat sources.
• Do not overload the scale beyond its maximum capacity of 600 grams.
• Keep the scale clean and dry. Avoid exposure to liquids.
• Use only the provided USB cord and AC/DC adapter, or recommended AA batteries.
• Do not attempt to disassemble or repair the scale yourself. Contact qualified personnel for service.

3. Package Contents

Verify that all items are present in the package:

• Eosphorus SF-460 B Electronic Scale
• USB Power Cord
• AC/DC Adapter
• User Manual (this document)

4. Product Overview

The Eosphorus SF-460 B features a compact design with a stainless steel weighing pan and an intuitive control panel.

Figure 4.1: Eosphorus SF-460 B Digital Scale with included accessories.

Key Components:

• Weighing Pan: Stainless steel platform for placing items to be weighed. Removable for cleaning.
• LCD Display: Backlit screen showing weight, unit, and other indicators.
• Control Buttons:
  • ON/OFF: Powers the scale on or off.
  • MODE: Cycles through available weighing units.
  • PCS: Activates the piece counting function.
  • TARE: Zeros out the weight of a container.
• Bubble Level: Integrated into the base to assist with proper leveling.
• Adjustable Leveling Legs: Non-slip feet that can be adjusted to ensure the scale is perfectly level.

5. Setup

5.1 Unpacking

Carefully remove the scale and all accessories from the packaging. Retain the packaging for future storage or transport.

5.2 Placement

Place the scale on a firm, flat, and stable surface. Ensure the location is free from:

• Vibrations or sudden movements.
• Air currents (e.g., from fans, air conditioning, open windows).
• Direct sunlight or rapid temperature changes.
• Sources of electromagnetic interference.

5.3 Leveling the Scale

Accurate measurements depend on a perfectly level scale. Use the integrated bubble level and adjustable legs:

1. Observe the bubble in the bubble level indicator on the scale's base.
2. Adjust the non-slip leveling legs by rotating them clockwise or counter-clockwise until the bubble is centered within the circle.

6. Power Supply

The Eosphorus SF-460 B offers flexible power options:

Figure 6.1: Power supply options: USB cable, AC/DC adapter, and AA batteries.

• USB Power: Connect the provided USB cord to the scale and a compatible USB power source (e.g., computer, power bank).
• AC/DC Adapter: Connect the USB cord to the provided AC/DC adapter, then plug the adapter into a standard wall outlet.
• Battery Power: For portable use, insert two (2) 1.5V AA batteries (not included) into the battery compartment located on the underside of the scale. Ensure correct polarity.

7. Operation

7.1 Turning On/Off

Press the ON/OFF button to power the scale on. Press and hold the ON/OFF button for a few seconds to power it off.

7.2 Basic Weighing

1. Ensure the scale is on a level surface and powered on.
2. Wait for the display to show "0.00" or "0.000" (depending on the unit).
3. Carefully place the item to be weighed onto the center of the weighing pan.
4. Read the stable weight displayed on the LCD screen.

Figure 7.1: Example of weighing a laboratory flask.

7.3 Tare Function

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

1. Place an empty container onto the weighing pan. The display will show its weight.
2. Press the TARE button. The display will reset to "0.00" (or "0.000").
3. Add the items to be weighed into the container. The display will show the weight of the items only.

7.4 Unit Conversion

The scale supports multiple units of measurement.

Figure 7.2: Available weighing units on the display.

Press the MODE button repeatedly to cycle through the available units:

• Pound (lb)
• Ounce (oz)
• Kilogram (kg)
• Gram (g)
• Carat (ct)
• Tael (tl)
• Piece Counting (pcs)

7.5 Piece Counting (PCS)

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

1. With the scale on and showing "0.00", place a sample quantity of items (e.g., 10, 20, 50, or 100 pieces) on the weighing pan.
2. Press and hold the PCS button until "PCS" appears on the display.
3. The display will prompt you to select the sample quantity (e.g., "10", "20"). Use the MODE button to select the correct sample quantity.
4. Press the PCS button again to confirm. The scale is now calibrated for piece counting.
5. Remove the sample and place the full quantity of items on the pan. The display will show the total count.

7.6 Calibration

The Eosphorus SF-460 B scale comes pre-calibrated from the factory. However, external calibration may be performed if necessary to ensure accuracy over time or after significant environmental changes.

Figure 7.3: Scale displaying 'PASS' after successful calibration.

To perform external calibration:

1. Ensure the scale is on a level surface and powered off.
2. Press and hold the MODE button, then press the ON/OFF button simultaneously. Release both buttons when "CAL" appears on the display.
3. The display will show a flashing weight value (e.g., "200.00g" or "500.00g"), indicating the required calibration weight.
4. Carefully place the exact calibration weight (not included) corresponding to the displayed value onto the center of the weighing pan.
5. Wait for the display to show "PASS" and then return to normal weighing mode. This indicates successful calibration.
6. Remove the calibration weight.

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

8. Maintenance

• Cleaning: Wipe the scale surface and weighing pan with a soft, damp cloth. Do not use abrasive cleaners or immerse the scale in water. The stainless steel weighing pan is removable for easier cleaning.
• Storage: When not in use for extended periods, store the scale in a dry, cool place, away from dust and extreme temperatures. Remove batteries if storing for a long time to prevent leakage.
• Inspection: Periodically check the leveling legs and weighing pan for any damage or debris that might affect accuracy.

9. Troubleshooting

10. Specifications

11. Warranty and Support

For warranty information and customer support, please refer to the documentation provided with your purchase or contact the seller directly. An electronic version of the user manual may also be available on the product's Amazon page under the "Product guides and documents" section.

Manufacturer: Suofei Eosphorus