Guohua 78 - 1 Unidirectional Magnetic Heating Stir

Introduction

Model 78-1 one-way magnetic heating stirrer magnetic stirrer, stable operation, stepless speed can carry out precise and stable stirring of liquid solution in a wide speed range, especially suitable for small volume samples. It is a necessary tool for modern petroleum, chemical industry, environmental protection, biochemistry, laboratory, analysis room, education and scientific research.

Magnetic heating stirrer|Magnetic stirrer several matters needing attention:

1. When the electric mixer fails, do not rush to do it first, but first ask about the history of the failure and the phenomenon of the failure. For unfamiliar equipment, you should also be familiar with the circuit principle and structural characteristics, and follow the corresponding rules. Before disassembly, you must be fully familiar with the function, location, connection method and relationship with other surrounding devices of each electrical component. If there is no assembly drawing, you should draw a sketch while disassembling, and mark it.

2. First check whether there are obvious cracks or defects in the equipment, understand its maintenance history, the service life of the magnetic heating stirrer, etc., and then check the inside of the machine. Peripheral fault factors should be excluded, and the device can only be disassembled after it is determined to be an internal fault. Otherwise, blind disassembly may make the device worse and worse.

3. Electrical after mechanical: Only after confirming that there is no fault in the mechanical parts, do the electrical inspection. When checking the circuit fault, you should use the testing instrument to find the fault location. After confirming that there is no bad contact fault, you should check the operation relationship between the circuit and the machine in a targeted manner to avoid misjudgment.

4. Static first and then dynamic: When the equipment is not powered on, judge whether the electrical equipment buttons, transformers, thermal relays and fuses are good or bad, and then determine the fault location. Power-on test, listen to the sound, measure parameters, judge the fault, and finally carry out maintenance. For example, when the motor lacks a phase, if the measured three-phase Voltage value cannot be judged, you should listen to the sound and measure each phase-to-ground Voltage separately to determine which phase is missing.

5. Clean first and then repair: For heavily polluted electrical equipment, first clean its buttons, wiring points, and contact points, and check whether the external control keys are out of order. Many failures are caused by dirt and conductive dust particles.

6. Power supply before equipment: The failure rate of the power supply part accounts for a high proportion of the entire faulty equipment, so checking the power supply first can often get twice the result with half the effort.

7. Debug after failure: For electrical equipment with coexistence of debugging and failure, the failure should be eliminated first, and then debugging. The debugging needs to be carried out under the premise of the speed of the electrical line.

8. Common first and then special: The failures of magnetic stirrers caused by the quality of assembly parts or other equipment failures generally account for about 50% of common failures. The special faults of electrical equipment are mostly soft faults, which need to be measured and repaired by experience and instruments.

When the electric stirrer is damaged in our experiment, we must not be anxious, we should deal with it calmly, and deal with it through the 8 points we explained above. Pay attention to the maintenance of the magnetic stirrer.

completeness-built unit X1, operation manual X1, certificate of conformity X1, warranty card X1

[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.