hen powered on, the screen shows the present temperature value, if temperature reset is needed, for example, adjust the preset value from -30't: to -35't:, please follow the steps below:

Temperature adjustment

 Press " / " " V " keys for 3 seconds simultaneously and the set temperature begins flickering. Every time when " V " key is pressed down, the temperature will drop 1"C until -42"C, then press back to -20"C ; Every time when " / " key is pressed down, the temperature will increase 1"C until -20"C, then press back to -42"C ; If no operation is done in 5 seconds , thenit exits the set state to resume the normal temperature display.

Temperature alarming:

For the safety of the inside box goods, the electronic temperature controller has the alarming function. When the inside temperature exceeds the alarming upper limit or lower limit, the buzzer will give an alarm, and the alarming indicator light on the screen will f licker at the same time. Press release key to stop the buzzing (the alarming light will keep flickering). When the inside temperature is within the range of upper and lower limits, the buzzing will disappear automatically.

Supply interruption memory function:

When powered again after supply interruption, the low temperature freezer has memory function so that it can keep on working under the setting condition before the supply was interrupted.

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