Thermo Scientific IMP 180, Manual

Page: 34 / 118

Product Description
Sensing and Control System
4-8 Heratherm IMP Thermo Scientific
Figure 4-8 PT100 Sensor IMP 400
The work space temperature sensor provides the inputs to the refrigerated incubator’s built-in
controller, which continuously compares the measured values to the user-specified set value
and adjusts the heaters according to the result.
The unit has a thermal protection function that is factory-preprogrammed and not adjustable.
It protects the cultures in the work space from overheating: Thermal protection kicks in on a
brief violation of the upper limit, based on the defined setpoint temperature, at between 2 and
3 °C (35.6 °F and 37.4 °F) (37 °C (99 °F): 2 °C (35.6 °F), > 50 °C (122 °F): 3 °C (37.4 °F)),
automatically reducing the work space temperature to the user-specified set value and allowing
the incubation process to be continued even in case of a controller malfunction. If the thermal
protection is activated, the error message (E111) “Temperature too high” appears in the
display window and an audible alarm is sounded.
When the user acknowledges the error message, the red alarm icon (D4 in figure 7-1 on
page 7-1 ) is illuminated and the Temperature Set Value icon (see table 7-3 on page 7-4 ) is
highlighted by a red border to indicate that thermal protection has kicked in.
Do not remove the protection hose from the sensor.
Protect the sensor from mechanical damage.