AEMC INSTRUMENTS Model 6255 Micro-Ohmmeter User Manual

1。 オーバーview

The AEMC INSTRUMENTS Model 6255 is a high-precision Micro-Ohmmeter designed for accurate resistance measurements. It is capable of measuring resistance from 0.1 microhm up to 2500 ohms, with a resolution of 0.1 microhm. This device is suitable for a wide range of industrial and scientific applications requiring precise low-resistance measurements.

Key features include an LCD display, an output current range of 0.1A to 10A, and internal data storage for up to 1500 test results. It is powered by an 8.5Ah NiMH battery, ensuring portability and extended operation.

2. 安全情報

Before operating the AEMC Model 6255, please read and understand all safety instructions. Failure to comply with these instructions may result in electric shock, fire, or damage to the instrument.

• 使用する前に必ず機器が良好な動作状態であることを確認してください。
• Do not use the instrument if it appears damaged or if the insulation on test leads is compromised.
• 地域および国の安全規則をすべて遵守してください。
• The instrument is rated IEC/EN 61010-1 CAT III 50V Pol 2. Adhere to these safety categories during operation.
• Do not attempt to measure resistance on live circuits unless specifically designed and rated for such applications.
• Use only accessories and test leads supplied or recommended by AEMC INSTRUMENTS.
• 機器は乾燥した清潔な状態を保ってください。極端な温度や湿度にさらさないでください。

3. 製品の構成と機能

The AEMC Model 6255 Micro-Ohmmeter comes with the following items:

• AEMC INSTRUMENTS 6255 Micro Ohm Meter
• Necessary test leads (not explicitly listed in "whats_in_the_box" but implied for operation)
• Power adapter/charger (for NiMH battery)
• ユーザーマニュアル（このドキュメント）

Figure 1: AEMC INSTRUMENTS Model 6255 Micro-Ohmmeter.The image displays the AEMC Model 6255 Micro-Ohmmeter housed within its robust yellow protective case, which is shown open. The device itself is yellow and black, featuring a clear LCD display that shows "72.6" and "0.1365 mΩ". To the left of the display are red and black input terminals labeled C1, P1, P2, and C2. Below the display are several control buttons. On the right side, there is a large rotary dial and a yellow START/STOP button. The overall design emphasizes durability and ease of use for industrial applications.

主要コンポーネント:

• LCDディスプレイ: Provides clear readings of resistance values, current, and other operational parameters.
• Input Terminals (C1, P1, P2, C2): For connecting test leads to the circuit under test. These are typically used for 4-wire (Kelvin) measurements to eliminate lead resistance.
• コントロールボタン: Used for navigating menus, setting parameters, and initiating tests.
• ロータリーセレクター: For selecting measurement ranges or functions.
• スタート/ストップボタン： Initiates and terminates resistance measurements.
• 保護ケース: Durable yellow case designed to protect the instrument in various environments.

4. セットアップ

4.1 初期充電

The AEMC Model 6255 is powered by an 8.5Ah NiMH battery. Before first use, or if the battery is low, connect the provided charger to the instrument and a suitable power outlet. Allow sufficient time for the battery to fully charge. The charging indicator on the device will provide status.

4.2 テストリードの接続

The Model 6255 utilizes a 4-wire (Kelvin) measurement method for high accuracy, which requires four connections to the test object. This method minimizes the impact of lead resistance on the measurement.

1. Ensure the instrument is turned off before connecting leads.
2. Connect the current leads (C1 and C2) to the outer points of the resistance to be measured.
3. Connect the potential leads (P1 and P2) to the inner points of the resistance to be measured. These leads measure the voltage drop across the resistance.
4. Ensure all connections are secure and clean to prevent erroneous readings.

5. 操作手順

5.1 電源のオン/オフ

Press and hold the power button (if separate, or a specific function on the rotary dial) to turn the instrument on. Repeat the action to turn it off.

5.2 測定モードの選択

Use the rotary selector switch to choose the desired measurement range or mode. The Model 6255 supports resistance measurements from 0.1 microhm to 2500 ohms.

5.3 測定の実行

1. Ensure the test leads are correctly connected to the object under test as described in Section 4.2.
2. Select the appropriate measurement range using the rotary dial. If unsure, start with a higher range and decrease as needed.
3. を押す スタート/ストップ button to initiate the measurement. The instrument will apply a test current (0.1A to 10A) and display the resistance value on the LCD.
4. Wait for the reading to stabilize. The LCD will show the measured resistance with 0.1 microhm resolution.
5. を押す スタート/ストップ button again to stop the measurement.

5.4 データの保存と呼び出し

The Model 6255 can store up to 1500 test results. Refer to the on-screen menu or specific buttons (e.g., "MEM" or "SAVE") for instructions on saving and recalling measurements. The RS232 interface allows for data transfer to a computer for further analysis.

6. メンテナンス

6.1 クリーニング

Regularly clean the instrument's casing and display with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the instrument is turned off and disconnected from any power source before cleaning.

6.2バッテリーケア

To prolong the life of the 8.5Ah NiMH battery:

• 電池残量低下インジケーターが表示されたら、バッテリーを充電してください。
• Avoid deep discharges where possible.
• If storing the instrument for an extended period, ensure the battery is partially charged (around 50%) and recharge it every few months.
• バッテリーを極端な温度にさらさないでください。

6.3 キャリブレーション

The AEMC Model 6255 is a precision instrument. While the product description states "No Calibration Certificate" is included, periodic calibration by a qualified service center is recommended to ensure continued accuracy and compliance with industry standards. Contact AEMC INSTRUMENTS for calibration services.

7。 トラブルシューティング

8. 仕様

9. 保証情報

AEMC INSTRUMENTS products are designed and manufactured to the highest quality standards. For specific warranty terms and conditions applicable to your Model 6255 Micro-Ohmmeter, please refer to the warranty card included with your product or visit the official AEMC INSTRUMENTS webサイト。通常、保証は通常の使用における材料および製造上の欠陥をカバーします。

保証請求のために購入証明書を保管してください。

10. カスタマーサポート

For technical assistance, service, or repair of your AEMC Model 6255 Micro-Ohmmeter, please contact AEMC INSTRUMENTS customer support.

• Webサイト： Visit the official AEMC INSTRUMENTS webFAQ、製品ドキュメント、サポート連絡先情報が記載されたサイトです。 www.aemc.com
• 接触： 参照 website or your product packaging for phone numbers and email addresses for technical support in your region.

When contacting support, please have your instrument's model number (6255) and serial number ready.