Carbon dioxide analyzer When using the incubator, the water tank needs to be filled with water to work properly. Operation method: Plug in the power supply, tighten the water inlet connector, unscrew the overflow plug, connect the water inlet pipe (provided by the user) to the upper left water inlet of the box, turn on the power switch, the buzzer will sound, and the low water level indicator light on the operation panel will turn on. When the water is filled to the low water level, the light will turn off. Continue to fill the water to the overflow port, and the water will overflow. Turn off the power, remove the connecting pipe and water filling joint. Pull out the drain pipe, drain about 100ml of water, plug the drain plug tightly, and turn off the power switch