Bibby Sterilin Techne 140H Operator's Manual page 16

T E C A L 1 4 0 H O P E R A T O R ' S M A N U A L
Power Indicator
The top indicator shows that there is power to the unit
Power to the Block Indicator
The next indicator shows when there is power to the block.
When the set temperature is different to the block temperature this indicator
will light. If the light is on continuously the block is getting constant power.
The only exception is described under Over-Temperature Indicator. As the
temperature approaches the set temperature the indicator will flash. When
set temperature is reached the indicator will stay on for shorter periods.
Sensor fault Indicator
If the unit there should, for any reason, be a sensor fault, the bottom
indicator will light. The power to the block will have been switched off and
the unit will begin to return to ambient even if the power light is on (the light
staying on or not depends on which circuit has sensed a fault).
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