MTC-20/2S User Manual
_______________________________________________________________________________________________________________
The actual temperature at the sensor now approaches the desired temperature but will not
reach 37 °C because the control loop is not yet well adjusted. The actual temperature should
arrest at 1 to 2 °C below the desired temperature. Please wait until this steady state value is
reached. This may last several minutes. If this value is not reached set the GAIN to higher
levels until - in this example – 35 °C to 35.5 °C is reached. If you don’t get a steady state
value, set the LIMITER to 80-90% (or 30-40%, respectively) and wait again.
Now turn on the INTEGRATION and set it to a low level
INTEGRATION
OFF
MAX.
The actual temperature at the sensor will now reach the desired temperature possibly after a
small overshoot. Wait again until the steady state value is reached.
•
If the desired temperature is not reached first set the GAIN to a slightly higher level and
then – if necessary – raise the INTEGRATION
Note
: The speed of the control circuit (and therefore the time in which the actual
temperature reaches the DESIRED TEMPERATURE) is highly dependent on the first
settings of GAIN and INTEGRATION. Thus, when beginning to use the MTC-20/2S we
recommend to try out several first settings of GAIN and INTEGRATION to find out which
settings are best for your experimental conditions.
If you use a perfusion system it is recommended to heat the solution approximately to the
desired temperature
before
perfusing the bath either with a heating foil wrapped around the
supplying tube (available from npi) or by heating up the supplying bowl.
As mentioned above it is very important that the sensor element and the heating element are
in good thermal connection.
___________________________________________________________________________
version 2.7
page 14
