Why does the incubator temperature cycle between approximately 49°C and 37°C, and will not stabilise at 44°C?
Observation When trying to calibrate the 44°C incubator, the temperature rises to approximately 49°C and then suddenly falls to approximately 37°C before once again rising to 49°C. If the kit is left switched on, the incubator continues to cycle between these two temperatures. Fault The incubator is fitted with a thermal cut-out switch that prevents the temperature rising above 50°C. This safety switch is inactivated once the temperature falls below 35°C. However, because the switch is connected to the outside of the incubator, the switch heats up and cools slightly faster than the core temperature. The apparent fault is caused by the incubator temperature having been accidentally adjusted to above 50°C. Remedy Reduce the temperature of the incubator by turning the adjuster screw two turns in a clockwise direction. This should reduce the temperature of the incubator by approximately 8°C. Switch on the incubator and check the temperature after one hour (this is sufficient time for the i
