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7.6.
Control parameters – Xp, Tv, Tn
Setting range:
0.1 ... 99.9
Setting range::
1 ... 9999
Setting range:
0 ... 99
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The control parameters preset in factory are in most cases
adequate for achieving an optimum temperature pattern for the
samples requiring temperature application.
Each parameter may be manually set via the keypad if
necessary, to allow optimum control performance.
Proportional range >Xp<
The proportional range is the range below the selected
temperature value in which the control circuit reduces the
heating power from 100 % to 0 %.
Resetting time >Tn< (Integral component)
Compensation of the remaining control deviation due to
proportional regulation. An insufficient resetting time may
cause instabilities to occur. Excessive resetting time will
unnecessarily prolong compensation of the control difference.
Lead time >Tv< (Differential component)
The differential component reduces the control settling time.
An insufficient lead time will prolong the time required to
compensate for disturbance effects and cause high
overshooting during run-up. An excessive lead time could
cause instabilities (oscillations) to occur.
1.
Press the
button until the desired menu item is
displayed.
2.
Press enter
3.
Set value:
Use the cursor keys
display until the numeral you wish to change blinks.
Use the increase/decrease arrows
selected numeral (-, 0, 1, 2, 3, ... 9).
4.
Press enter
to indicate the parameter.
to move left or right on the
to store the selected value.
MC
to change the
41
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