Dot-matrix Reagent Dispenser: Common Issues and Solutions

The dot-matrix reagent dispenser is widely used in biopharmaceutical R&D, clinical testing, and scientific research due to its precise and efficient reagent dispensing capabilities. However, during long-term use, factors such as reagent properties, operating environment, and frequency of use may lead to certain common issues. Below is a detailed breakdown of these problems and their corresponding solutions to ensure stable equipment operation and guarantee the smooth progress of experiments and production.

I. Abnormal Dispensing Accuracy

1. Inaccurate Dispensing Volume

   • May be caused by: Blocked syringe pump, liquid leakage in the tubing, or calibration parameter deviation.

   • Solution: Clean the syringe pump and tubing, remove air bubbles, and recalibrate the instrument.

2. Reagent Leakage or Splashing

   • May be caused by: Nozzle blockage or aging sealing ring.

   • Solution: Clear any foreign objects from the nozzle and replace the worn sealing ring.

II. Mechanical Operation Failures

1. Motor Not Running or Jamming

   • May be caused by: Insufficient lubrication of the guide rail, motor drive failure, or obstruction by foreign objects.

   • Solution: Clean the guide rail and apply lubricating oil, inspect the motor drive circuit and mechanical structure.

2. Tray Not Feeding

   • May be caused by: Faulty proximity switch or excessive cam spacing.

   • Solution: Replace the proximity switch and adjust the cam to the appropriate distance.

III. Control System Issues

1. Abnormal Display or Touch Failure

   • May be caused by: Loose connection cables or electrostatic interference.

   • Solution: Secure the connection cables, eliminate static electricity through grounding, and restart the system.

2. Temperature/Pressure Alarm

   • May be caused by: Sensor malfunction or abnormal ambient temperature.

   • Solution: Recalibrate the sensor and ensure the operating environment temperature is within the range of 5–40°C.

During daily use, it is recommended that operators strictly adhere to the equipment operating procedures and perform regular cleaning and maintenance on the dispenser. These practices can effectively reduce the occurrence of the above issues and extend the equipment’s service life. If problems that cannot be resolved independently arise, promptly contact the after-sales service team for professional technical support.