As a precision equipment used at high frequencies, the stability of laboratory bottle washing machines directly affects the accuracy of experimental data and work efficiency. Scientific maintenance can significantly reduce failure rates and extend equipment lifespan. The following is a systematic maintenance plan:
1、 Daily basic maintenance
1. Instant cleaning and drying
Immediately drain the water tank and spray pipeline after each use to prevent microbial growth. Wipe the inner and outer chamber walls with a soft cloth, focusing on removing scale and impurities from the rotating shaft of the spray arm and the filter screen of the drainage outlet.
It is strictly prohibited to leave undissolved solid particles (such as agar residue) in the cabin for a long time, as it may cause nozzle blockage.
2. Consumables management
According to the hardness of the water quality, it is recommended to automatically add neutral cleaning agents at a frequency of 3-5 cycles for hard water sources. Timely replace the turbid softened resin filter element to avoid calcium and magnesium ion deposition and damage to the heating tube.
Check the aging degree of the inlet hose every month, and replace it immediately if it cracks to prevent pipe bursting and leakage.
2、 Specialized care for key components
1. Filtering system
It is recommended to shake and clean the initial bag filter weekly, and replace it when the pressure difference exceeds twice the initial value.
According to the cumulative working time, the lifespan of reverse osmosis membrane is about 800 hours, and ultrafiltration membrane can reach 1500 hours.
2. Temperature control module
Verify the PT100 temperature sensor monthly, and the deviation between the measured value and the displayed value should not exceed ± 2 ℃. During calibration, a standard thermometer should be inserted into the center position of the carrier.
Scaling on the surface of the heating tube can cause a delay in heating up. It can be cleaned by soaking in a weak acidic solution and taking care not to damage the PTFE coating.
3、 Response to special working conditions
Sudden water outage treatment: Before restoring water supply, it is necessary to exhaust the air in the pipeline, otherwise it may cause the water pump to run idle and burn out.
Chemical corrosion emergency: After accidentally washing strong acidic and alkaline solutions, immediately rinse with clean water continuously for 3 complete cycles, and disassemble the machine to check the corrosion of the seals.
Mechanical noise investigation: Insufficient oil in the bearing will produce sharp friction sounds, and it is necessary to inject oil in a timely manner; If the transmission belt jumps, the motor base bolts need to be adjusted.
4、 Long term shutdown protection
Perform the following steps before sealing off the holiday:
1. Drain all water storage tanks, remove the spray arm and immerse it in anhydrous ethanol for storage
2. Place desiccants in a closed space and control the relative humidity below 40%
3. Cut off the power and cover it with a dust cover. Power on for 10 minutes every week to prevent moisture
5、 Taboo Warning
Do not directly rinse measuring instruments with scales, as water flow impact can cause the scale to fall off
Do not use chlorine containing disinfectants as they can accelerate intergranular corrosion in stainless steel chambers
Overloading operation is strictly prohibited, and the loading capacity should not exceed 80% of the rated capacity
By establishing a standardized maintenance process and combining it with electronic inspection records (it is recommended to use QR code scanning to report work), the full lifecycle management of bottle washing machines can be achieved. Regular training of laboratory personnel to master basic maintenance skills can effectively improve equipment utilization and provide reliable vessel cleaning support for the laboratory.