GOYOJO FA2204E Analytical Balance User Manual

1. はじめに

Thank you for choosing the GOYOJO FA2204E Analytical Balance. This precision instrument is designed for highly accurate weighing in laboratory, industrial, and educational settings. With a capacity of 220 grams and a readability of 0.1 mg (0.0001g), it is ideal for measuring small, delicate samples such as chemicals, jewelry, and gemstones. This manual provides essential information for the safe and efficient operation, setup, and maintenance of your analytical balance.

2. 安全情報

• 天秤は常に、振動や隙間風のない安定した水平な場所で操作してください。
• 天秤を極端な温度、湿度、または直射日光にさらさないでください。
• 最大容量の 220g を超えて天秤に負荷をかけないでください。
• 付属の電源アダプターのみを使用してください。
• 天秤を清潔に保ち、ほこりや化学物質のこぼれを防ぎます。
• Do not attempt to disassemble or repair the balance yourself. Contact qualified service personnel.
• Ensure proper ventilation when weighing volatile substances.

3. パッケージ内容

箱を慎重に開梱し、すべてのアイテムが揃っていて損傷がないことを確認します。

• GOYOJO FA2204E Analytical Balance unit
• Weighing pan (80mm diameter)
• Draft shield (glass enclosure)
• 電源アダプター
• Calibration weight (if included)
• ユーザーマニュアル（このドキュメント）

4.製品オーバーview

The FA2204E analytical balance features a robust design with a glass draft shield to protect against air currents, ensuring stable and accurate readings. It includes an easy-to-read LCD and multiple connectivity options.

図4.1: 前面 view of the GOYOJO FA2204E Analytical Balance with a sample beaker.

主要コンポーネント:

• 計量皿: Stainless steel platform for placing sampレ。
• ドラフトシールド: Glass enclosure to minimize air current interference.
• LCDディスプレイ: Shows weight readings, units, and operational status.
• コントロールパネル： Buttons for power, tare, unit selection, and calibration.
• レベルインジケーター： Bubble level for ensuring proper balance setup.
• 調節可能な足: For leveling the balance.
• RS232/USB Ports: 外部機器とのデータ通信用。

5. セットアップ

5.1開梱と配置

1. 天びんを慎重に梱包から取り出してください。梱包材はすべて保管し、将来の輸送や保管に備えてください。
2. Place the balance on a sturdy, level, and vibration-free workbench. Avoid locations near air conditioning vents, windows, or heavy machinery that could cause drafts or vibrations.
3. 天秤の操作およびメンテナンスのために天秤の周囲に十分なスペースを確保してください。

5.2 組み立て

1. Install the weighing pan onto the pan support. Ensure it sits securely and centrally.
2. Assemble the glass draft shield around the weighing pan. The shield panels should slide smoothly into their designated slots.

図5.1：側面 view illustrating the assembled draft shield and weighing pan.

5.3 バランスの均衡

Accurate leveling is crucial for precise measurements.

1. Locate the bubble level indicator, usually at the front or side of the balance base.
2. Adjust the two front adjustable feet (or all four, depending on the model) by turning them clockwise or counter-clockwise until the air bubble is centered within the indicator circle.

5.4電源接続

1. Connect the power adapter to the power input port on the rear of the balance.
2. 電源アダプタを適切な電源コンセント（110V ～ 240V）に差し込みます。

図5.2：背面 view showing the power input, RS232, and USB ports.

6. 操作手順

6.1 電源のオン/オフ

• 電源を入れるには: を押す [オン/オフ] button. The display will show a self-test sequence and then settle at zero.
• 電源を切るには: を押し続けます [オン/オフ] ディスプレイが消えるまでボタンを押し続けます。

6.2 初期ウォームアップ

Allow the balance to warm up for at least 30 minutes after powering on for the first time or after a long period of inactivity. This ensures thermal stability and optimal measurement accuracy.

6.3 キャリブレーション

Regular calibration is essential for maintaining accuracy. Refer to your specific model's calibration procedure, which typically involves using a known calibration weight.

1. Ensure the balance is level and warmed up.
2. Clear the weighing pan.
3. Access the calibration menu (often by pressing and holding a specific button like [カル] or [モード]).
4. 画面上の指示に従って、指定された校正用重量を皿に置きます。
5. Remove the weight when prompted. The balance will then display "PASS" or similar upon successful calibration.

6.4 基本的な計量手順

Figure 6.1: Close-up of the LCD display and control panel.

1. バランスをゼロにする: With nothing on the weighing pan, press the [ゼロ] ボタンを押して表示を 0.0000g に設定します。
2. Taring (for containers): Place an empty container on the weighing pan. Wait for the reading to stabilize, then press the 【風袋】 button. The display will return to 0.0000g, effectively subtracting the container's weight.
3. Sを配置するamp上： Carefully place the item or substance to be weighed onto the center of the weighing pan (or into the tared container). Close the draft shield doors.
4. 測定値の読み取り: Wait for the reading on the LCD to stabilize. This is your accurate weight measurement.
5. ユニット選択: を押す [単位] or [モード] button to cycle through available weighing units (grams, carats, ounces, etc.).

6.5 Data Transfer (RS232/USB)

The FA2204E balance is equipped with RS232 and USB interfaces for connecting to a computer or printer for data logging and analysis.

• Connect the appropriate cable (RS232 or USB) from the balance to your computer or peripheral device.
• Install any necessary drivers or software provided by GOYOJO or available online for your operating system.
• Refer to the software's instructions for configuring communication settings (e.g., baud rate, data bits, parity) to match the balance's settings.
• Data can typically be sent manually via a print button or automatically at specified intervals, depending on the balance's settings and connected software.

7. メンテナンス

7.1 クリーニング

• 清掃する前に必ず天びんを電源から外してください。
• 柔らかくてamp 外装面の清掃には、中性洗剤を含ませた布をご使用ください。研磨剤入りの洗剤や溶剤の使用は避けてください。
• The stainless steel weighing pan can be removed and cleaned separately with soap and water. Ensure it is completely dry before re-installing.
• Use a soft brush or lint-free cloth to gently clean around the weighing pan and inside the draft shield.
• Do not allow liquids to enter the balance housing or ports.

7.2 ストレージ

• When not in use for extended periods, store the balance in a clean, dry, and temperature-controlled environment.
• Cover the balance with a dust cover to prevent dust accumulation.
• If transporting the balance, use the original packaging to protect it from shock and vibration.

8。 トラブルシューティング

9. 仕様

10. 保証とサポート

For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase documentation or visit the official GOYOJO website. Please have your model number (FA2204E) and purchase date ready when contacting support.