Constant temperature water and oil bath

The use rate of constant temperature water and oil bath in various laboratories is still very high, and it is one of the more basic laboratory equipment.Because of its extensiveness, people’s awareness of it is also very high.But, some small faults sometimes occur during use.First, a stainless steel U-shaped tubular heater is placed horizontally in the constant temperature water and oil bath, and an aluminum shelf with holes is placed inside the sink.There is a drain pipe on the left side of the water bath, and an electric box on the right. The front panel of the electric box is equipped with temperature control instruments and power switches.There are electric heating pipes and sensors in the electrical box. The temperature control system adopts high-quality electronic components, which are sensitive in temperature control, reliable in performance and easy to use.Its working principle: The Cu50 sensor converts the temperature of the water in the sink into a resistance value. After being amplified and compared by the integrated amplifier, it outputs a control signal to effectively control the average heating power of the electric heating tube and keep the water in the sink at a constant temperature.

The instrument uses imported stainless steel plate material as the inner tank. The shell is made of high-quality electrostatic spray.The electric heating tube has fast heating, high heat efficiency, power saving and electronic constant temperature.We have also improved the temperature control system of the product, adding a temperature control device for both digital display and display.The oil bath shell and inner tank are protected by temperature insulation cotton, which has good heat preservation effect.Various high temperature baths of the same model are available.

How to deal with the fault of the constant temperature water and oil bath?

If the inside of the constant temperature water bath is damp, the insulation resistance will drop, which will cause the leakage protection circuit to trip. Generally, this kind of situation occurs, as long as the casing of the instrument is opened and the inside is dried with a hair dryer.

Secondly, if the instrument is still tripped when it is confirmed that the instrument is not damp, this type of situation is mostly a breakdown or short circuit of a component in the high-voltage circuit.So how to judge the short circuit and the leakage, the fuse will be blown in the case of a short circuit, and the leakage will not generally blow the fuse.The short circuit can be repaired by the point-by-point disconnection method. Use a multimeter to find the short-circuit point. The resistance in the short-circuit is generally 0Ω, and it can be replaced when the component is found.If it is leakage, it is generally difficult to find breakdown under high voltage due to the low voltage in the multimeter. At this time, a 500v or 1000v shaking meter can be used, and the point-by-point disconnect method can be used to check the breakdown of the components.