1. Check whether the rubber pad and water bath of the instrument are placed in the specified position, and put an appropriate amount of water in the water bath (so that the water level does not exceed the maximum water level line after being placed in the beaker). 2. Insert the plug in the power cord, temperature sensor plug and heater plug of the instrument into the designated jacks and insert it firmly; connect the one-way valve to the air pump conduit; insert the temperature sensor from the round hole in the middle of the top of the water bath firmly, and It should be about 60mm deep into the water.
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