The Essential Guide to the Eppendorf 5402 Centrifuge: Why the Updated Manual Still Matters

By Lab Equipment Insights

: Use 70% isopropanol or neutral alcohol-based disinfectants with a soft cloth for routine maintenance. Troubleshooting

• Produce a one‑page quick start card for bench use.
• Draft a full updated manual section (e.g., calibration procedure with step‑by‑step gravimetric test and example calculations).
• Create printable troubleshooting flowchart.

Troubleshooting Error 6: If you encounter Error 6, it may indicate a loose rotor, converter overload, or a defective brake. Wait 5 minutes after switching the unit off before restarting.

Final Verdict: Should You Keep the 5402 in Service?

The Eppendorf 5402, when paired with an updated manual and a strict preventative maintenance schedule, remains a capable backup or low-throughput centrifuge. However, if your lab cannot locate a verified Rev. 5 or later manual, or if the lid lock has never been retrofitted, it is time to retire the unit. Modern equivalents like the Eppendorf 5425 or 5430 R offer better energy efficiency, quieter operation, and full digital documentation.

| Frequency | Task (from updated manual) | Consumable/Part | | :--- | :--- | :--- | | Daily | Clean rotor chamber with ethanol (70%); wipe lid seal. | Lint-free wipe | | Monthly | Inspect rotor lid O-rings for cracking; lubricate with Eppendorf grease (No. 5810 310.008). | Silicone grease | | Quarterly | Measure rotor runout (max 0.1 mm). Check motor carbon brush length (<5 mm = replace). | Carbon brushes (2x) | | Annually | RPM calibration using a tachometer (Offset ±2% max). | Calibration sticker | | Every 5 years | Replace lid lock solenoid and all rubber feet. | Service kit SK-5402 |