Thermo Scientific HAAKE RotoVisco 1 Instruction Manual page 67

Temperature Control Units
Explanation for the cooling
The cooling rate is limited especially for a value when cooling
below the ambient temperature. Therefore, the settings of
the software have to be adapted in order to reach the temper-
ature desired:
1. For the measuring definition of temperature ramps
downwards the "rising" will be tested -- for cooling neg-
atively. That means that it has to be calculated accord-
ing to the set values for start and end temperature as
well as the duration using a formula to find out whether
the cooling rate can be achieved. If it is not possible an
error message shows the possible cooling rate.
2. At the beginning of a segment cooling down to the set
starting temperature can be necessary. This cooling-
down time will be calculated. In case the time being
higher that 10 s the band width will be set from 0.0 to
0.1 to reach the desired start temperature. In this case
a message window appears as always whenever the
band width for the start temperature is unequal 0.0. The
system waits until the band width of 0.1 has been
reached.
Attention: An abortion using the F7 key would also
abort the cooling process. Then the segment would be
measured with the temperature reached until then.
3. For temperature segments the waiting time set by the
user might be too short to hold the possible cooling
rate. In case the time being more than 10 s too short it
will be set to the required value.
The sensor system and the temperature control unit require
cooling that is dependent on the load and the temperatures
during the measurement.
65