Blast drying oven is a commonly used instrument and equipment, mainly used for drying samples, and can also provide the temperature environment required for experiments Drying ovens are used in various industries such as chemical, electronics, casting, automotive, food, machinery, etc. They are suitable for drying, baking, wax melting, sterilization, and solidification in industrial and mining enterprise laboratories, medical and health institutions, and scientific research units.
Below, the editor will briefly introduce several common faults and solutions of the air drying oven
（1） Fault phenomenon: There is a difference between the temperature displayed on the control board and the mercury thermometer inside the box
resolvent:
1. The thermometer needs to be inspected and qualified by the testing department before measurement.
2. Measurement and installation position of mercury thermometer: Please suspend the thermometer in the center of the cavity and do not directly place it on the shelf for measurement.
3. If the temperature sensor is damaged, it needs to be replaced.
4. If there is an error between the set temperature and the sensor measurement value, the deviation of the process value needs to be adjusted.
（2） Fault phenomenon: Temperature display jumping or stationary, or abnormal
resolvent:
It can be determined that there is a problem with the temperature sensor and it should be replaced and resolved.
（6） Fault phenomenon: Abnormal overtemperature alarm
1. If it is caused by a lower set temperature, adjust the set temperature.
2. If the temperature controller is damaged, please contact the after-sales service and ask the manufacturer to replace the temperature controller.
（3） Fault phenomenon: The motor is not running
resolvent:
Result: There is heating, but the inner liner cannot circulate, causing slow temperature rise. Notify the after-sales service and ask the manufacturer to replace and handle it.
（4） Fault phenomenon: No response from the power switch device when plugged in and turned on
resolvent:
1. Power supply issue, please seek assistance from an electrician to resolve.
2. If the electric heating tube is burnt out, the resistance value at both ends of the electric heating tube can be measured with a multimeter in the "ohm" range. If the resistance value is 0, it indicates a short circuit in the electric heating wire, which is manifested as a total tripping of the circuit breaker; If the resistance value is several hundred kiloohms or infinite, it indicates that the heating wire has melted and is open circuit.
3. The power switch plug has come off.
4. The power switch is on, you can check the control circuit board and corresponding connecting wires.
5. If the fuse is disconnected or damaged, please contact the after-sales service to confirm the component issue and request the manufacturer to replace it.
（5） Fault phenomenon: Temperature cannot rise
resolvent:
1. Check if the scheduled time has reached the set value; Most users are not familiar with this function. When the scheduled time reaches the set value, the heating tube will not work and the fan will not turn, resulting in no heating and temperature rise.
2. Check if the fan is running. If it is found to be faulty (a multimeter can be used to measure if there is 220V voltage at the two terminals of the fan pins), notify the sales personnel to contact the after-sales team or manufacturer for inspection and resolution.
3. Check the circuit control board, use a multimeter to check for output, and check according to the drawing.
4. If the temperature controller or circulating fan is damaged, contact the manufacturer to replace the damaged parts.