I. Immediate Maintenance After Daily Use
Sample Chamber / Centrifugal Chamber
After each use, take out centrifuge tubes and sample bottles; wipe off residual solvents and stains inside the chamber and on the rotor surface. Avoid corrosion to the chamber caused by residual acid, alkali and corrosive liquids.
Sealing Ring / Door Gasket
Wipe the sealing ring with a dust-free soft cloth to remove solvent residues and crystals. Do not scrape with hard objects to ensure airtightness when the door is closed.
Condensation Bottle / Collection Bottle
Empty waste liquid and solvent residues, clean and dry thoroughly before reinstallation to prevent waste liquid backflow and pipeline blockage.
Chamber Ventilation
Open the chamber lid and ventilate for 10–20 minutes to dissipate organic solvent vapor, preventing internal corrosion and component aging.
II. Vacuum Pump Maintenance (Core Key Points)
Oil-sealed Vacuum Pump
Regularly check the oil level and oil color of the vacuum pump. Replace the pump oil immediately if it turns black, turbid or emulsified.Inspect the air intake filter and oil-gas separator monthly; replace them in time if clogged.Close the air valve when not in use for a long time to prevent waste liquid backflow into the pump body. Oil-free Diaphragm Pump
Regularly inspect the diaphragm and air intake filter element; clean or replace promptly if blocked by dust.Avoid direct long-term pumping of high-concentration acid, alkali and corrosive vapor. Install a cold trap or adsorption device if necessary. III. Rotor and Centrifugal Assembly Maintenance
Inspect the rotor before each use to ensure no cracks, no deformation and tight fixing screws.Handle the rotor with care and avoid collision. Do not overload or place sample tubes asymmetrically.Clean the rotor regularly with neutral detergent, dry it completely before installation, and never operate with water remaining. IV. Cold Trap / Condensing System Maintenance
Defrost the inner wall of the cold trap regularly and clean solvent crystals.Check the refrigerant liquid level regularly and replenish it in a timely manner if insufficient. Inspect pipeline joints for no frost formation and no air leakage.Drain waste liquid from the cold trap and store it in a dry state when idle for a long time. V. Circuit and General Equipment Maintenance
Dust the equipment surface and heat dissipation vents regularly to ensure smooth ventilation.Keep the power supply well grounded and avoid frequent power on and off.Wipe the touch screen and buttons with a dry soft cloth; do not splash liquid directly on the equipment.Placement requirements: place on a stable platform, keep away from acid and alkali corrosion, store in a cool, dry and well-ventilated area, and avoid direct sunlight. VI. Scheduled Periodic Maintenance (Recommendation)
- Daily: Clean the chamber, sealing ring and waste liquid bottle; inspect for abnormal appearance.
- Weekly: Check vacuum degree, pump oil condition and pipeline airtightness.
- Monthly: Dust the whole equipment, check rotor tightness, replace air intake filter element.
- Quarterly: Replace vacuum pump oil (oil-sealed pump), perform deep cleaning on the cold trap, inspect sealing ring aging and replace it if deteriorated.
VII. Prohibitions & Precautions
Do not concentrate highly corrosive, strong oxidizing or explosive samples directly without protective measures.It is forbidden to open the door or reach into the chamber during operation.Do not start vacuum pumping when the equipment is undried or with excessive liquid residue.Stop the machine immediately for troubleshooting in case of vacuum leakage, abnormal noise or failure to reach standard vacuum degree; never operate the equipment with faults.
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