13 DISMANTLING AND ASSEMBLY
OF SPECIAL UNITS
PAGE
13.10R
6 Determing the Cut-Off Temperature (Setpoint)
■ Adjust the cut-off temperature at the STP-2A to 90 °C (see section 7).
■ Start the pump.
■ When under constant and steady pumping conditions a constant temperature
indication is being attained, read out this temperature.
The indicated temperature depends on the application conditions as e.g. the product
temperature / rotation speed.
Due to a change in the temperature sensor mounting, the temperature shown for iFD-
Stators
®
and for the stators of some pumps used in hygienic applications is generally
higher than the temperature measured for normal stators with a steel casing.
■ Then the cut-off temperature should be set about 5-10 °C higher than the indicated
temperature (see section 7).
7 Setting the First and Second Cut-Off Temperature S1 and
S2
(e.g. the temperature measured during operation and during cleaning)
(S1: switching input E1 open, S2: switching input E1 closed)
In normal condition of the controller, the cut-off temperature value is easily to adjust.
With no key pressed, the display shows the measured housing temperature.
■ Press SET key: The cut-off temperature is displayed.
■ Hold down SET key and also press ▲ or ▼ key: The cut-off temperature goes up or
down.
■ Unlock ▲ or ▼ key: The adjusted cut-off temperature is stored.
■ Now unlock SET key.
(The cut-off temperature is retained in memory even in case of a power failure.)
8 Switching and Alarm Functions
With the temperature sensor connected and the operating voltage applied to the
controller, the internal relay K1 is energized.
If the cut–off temperature is being exceeded or a cable break or a short circuit is
occurring in the temperature sensor, the internal relay K1 drops out. Then the display
flashes and a buzzer sounds.
The optical and acoustical signals are deleted by pressing the ▼ key.
The set point switching from S1 to S2 is effected by closing the switching input E1.
For terminals see section 9.
text no.
R 13105-6/8
issued: 14.10.2019
Revision: 23
copy to:
94
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