How to maintain the laboratory equipment digital constant temperature oil bath when used normally? Today, summarize the following points for you:

1. Set the temperature of the digital constant temperature oil bath, the temperature is normal but not heated. First, judge from the screen display, first turn on the power, adjust the set temperature to more than 20 °C above the design temperature, and then observe whether the heating indicator is on. If it is bright, it indicates that the heating tube is broken or the relay contact is in use for a long time. The middle contact is ablated, causing it to fail to turn on, so it cannot be heated and needs to be replaced.

2. The temperature setting and temperature measurement of the digital constant temperature oil bath are normal, but the heating is continued when the temperature reaches the set temperature. Observe whether the heating indicator is extinguished after reaching the set temperature. If it is off, the temperature controller is normal. Just replace the relay. If the heating indicator is always on, the temperature controller is broken and needs to be replaced.

3. After using for a period of time, it is found that the temperature cannot be increased. Most of the heating tube resistance is increased or the connection line of the heating tube is rusted, resulting in a large contact resistance. The former needs to replace the heating tube, and the latter will cut off the connection line head and at the same time The rusted part of the heating pipe joint is cleaned, and the new connection and the method can be judged by visual inspection.

4. After setting the temperature, the temperature measurement display drops, but the actual temperature is in the heating state. This phenomenon occurs in the replacement of the new sensor, just change the positive and negative terminals of the sensor.

5. The digital display thermostatic oil bath screen displays 000 or 999, etc., the sensor is open or shorted, and can be replaced.

6. There is no power supply in the whole machine. Check whether the power socket has power, whether the fuse is intact, and whether the power switch has fault. This fault is mostly caused by the power switch.

7. The power indicator light is on, but the temperature controller has no screen display. Check whether the output on the temperature controller is normal. Generally, such a fault is caused by a transformer on the temperature controller or a virtual soldering phenomenon during use.