Techne Tecal 650H, Руководство оператора

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PAGE 14
T E C A L 6 5 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 higher than the block temperature this indicator will
light. 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 indicator will flash. When set temperature
is reached the indicator will stay on for shorter periods. If the block temperature
is above the set temperature then the indicator will be off, as the heater is not
getting any power.
Over-Temperature Indicator
If the unit should, for any reason, exceed the temperature set for the over-
temperature cutout (see page 15), the over-temperature indicator will light. The
heater will have been switched off and the unit will begin to cool even if the
heater light is on (the light staying on or not depends on which circuit has
sensed an over-temperature).
Sensor fault Indicator
If 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 heater light is on (the light staying on or not
depends on which circuit has sensed a fault).