WIKA SC64 - Handbuch (Seite 17)

17 WIKA operating instructions models SC58, SC64
14054366.01 10/2012 GB/D
GB
d3 Defrost time limit 0 ... 99 min.
0 = without time limit
30 min.
* Standard setting dependent on sensor type
Parameter description
P2: Hysteresis, control contact 1
The hysteresis can be arranged either symmetrically or on only one side
of the set point (see A40).
For single-sided setting the hysteresis is effective below for a heating
contact, above for a cooling contact. With symmetrical hysteresis, in both
cases it is effective evenly above and below the switchpoint by a value of
half the hysteresis (see drawings).
7. Configuration
P4: Lower set-point limit
P5: Upper set-point limit
The adjustment of the set point can be limited upwards and downwards.
This prevents the end-user of a system setting inadmissible or dangerous
set points.
Set point
T
hysteresis
ON ON OFF OFF
t
Relay contact
Set point
T
hysteresis
ON ON OFF OFF
t
Relay contact
Heating controller,
single-sided hysteresis
Cooling controller,
symmetrical hysteresis