Techne TU-20D - Manual (Page 30)

The DOWn ArrOW button
When the SET temperature button is held down and the DOWN ARROW button is pressed, the set
temperature is decreased.
speed of change of set temperature
Each press of the UP ARROW or DOWN ARROW buttons will increase or decrease the set temperature
by 0.1°C. If the buttons are held down the temperature change will accelerate to 5°C per second.
power indicator
The top indicator shows that there is power to the unit.
heater indicator
The middle indicator shows when the heater is heating. When the temperature is being set, and the new
set temperature is higher than the temperature already in the unit, the heater indicator will light as the
unit tries to follow the set temperature. If the light is on continuously the heater is getting constant
power. The only exception is described under over-temperature indicator. As the temperature approaches
the set temperature the heater indicator will flash. When the set temperature is reached the indicator
will stay on for shorter periods. If the bath temperature is above the set temperature then the indicator
will be off, as the heater is not getting any power.
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