1. Accuracy Drift: Uneven liquid temperature, air bubbles, and nozzle blockage can directly cause unstable dripping speed and excessive output deviation. Long-term use leading to wear and loosening of mechanical parts can also cause irreversible drift in dripping accuracy, requiring calibration to correct the error.
2. Key Component Replacement: Replacing core consumables such as the burette rubber seal ring and silicone tubing changes component parameters, rendering the original calibration coefficients incompatible. Recalibration is necessary to maintain dripping accuracy.
3. Usage Scenarios: Severe vibration or displacement, restarting after prolonged inactivity, or dripping highly corrosive liquids can disrupt the original calibration, requiring recalibration to restore normal accuracy.
4. Mandatory Cycle Reached: A simple calibration should be performed weekly during routine use, and a full calibration should be performed every six months. Even if accuracy is not currently exceeding limits, preventative maintenance through calibration is required at the predetermined cycle.
5. Abnormal Experimental Data: Poor reproducibility of parallel experimental results and deviations between measured drop volume and set value exceeding the allowable range indicate that the equipment has deviated from its normal operating condition and requires parameter correction through calibration.
