Press immediately. Check tube balancing. Inspect the rotor for cracks or debris in the tube pockets. Chamber not cooling Condenser coils are dirty or refrigerant has leaked.
To maintain compliance with laboratory quality standards (GLP/ISO), the Eppendorf 5402 should undergo annual calibration verification.
Check the power cord and wall outlet. Slamming is unnecessary; press firmly on both front corners of the lid until it clicks. Asymmetric loading or damaged rotor.
By adhering to proper balancing techniques, keeping the condenser clear of dust, and keeping an updated copy of the troubleshooting guide on hand, your Eppendorf 5402 can continue to deliver precise, refrigerated separation performance for years to come.
Understanding the centrifuge's capabilities helps in using its manual effectively. Here are its core specifications:
Never attempt to bypass the lid safety switch or force the lid open while the rotor is spinning.
Turn off the unit. Allow the motor to cool down for 30 minutes before restarting. Condenser coils blocked or compressor failure.
Always balance your rotor. Fill tubes to equal volumes and place them directly opposite one another. Opposing tubes, caps, and adapters must weigh the same to within 0.1 grams. 3. Step-by-Step Operating Instructions
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Standard fixed-angle rotors typically accommodate 18 or 24 microcentrifuge tubes (1.5 mL to 2.0 mL).
Because this model has been in service for many years, finding an accurate, updated manual and troubleshooting guide is essential for keeping your unit running safely and efficiently. This comprehensive guide serves as an updated operational reference and troubleshooting resource for the Eppendorf 5402. 1. Key Specifications and Technical Overview
Avoid third-party PDF repositories. Many host a corrupted or pre-2005 version that lacks critical rotor life warnings.
No rotor detected; ensure the rotor is properly seated and secured .
Temperature sensors should be checked against a traceable reference thermometer placed inside the rotor chamber.
Press the key until the Speed display flashes. Use the adjustment keys to input your desired RPM or RCF value.