IKA HBC 10 control - Manual (Page 42)

42
• Menu (Details)
TEMPERING:
Control:
Control Mode:
Internal (int): The temperature is regulated according
to the internal temperature sensor (Fig. 2 Item 7).
Extern (ext): The temperature is regulated according
to the external temperature sensor (Fig. 2 Item 12).
Control parameters:
Automatic: The optimal control parameters for PID
temperature control are determined automatically. This
is the recommended mode.
Selecting "Automatic" allows you to set the dynamics
for temperature control:
Accurate: precise tempering without overshooting.
Fast: fast tempering with minimal overshooting.
Manual: The control parameters for PID temperature
control can be set manually.
"Manual" should only be used in the event of special
temperature control requirements.
When "Manual" is selected, the following parameters
can be set for "Internal (int)" and "External (ext)"
temperature control:
Kp: Proportional coefficient
The proportional coefficient Kp is the controller ampli-
fication and determines how strongly the control devia-
tion (the difference between the target temperature and
actual temperature) directly affects the control variable
(on-time of the heater). Kp-values that are too large can
lead to the controller overshooting.
Ti: Integral time
The integral time Ti (s) is the correction time and deter-
mines how strongly the duration of the control devia-
tion affects the control variable. Ti compensates for an
existing control deviation. A high Ti means a smaller
and slower effect on the control variable. Ti-values that
are too small can lead to instability of the controller.
Td: Differential time
The differential time Td (s) is the derivative time and de-
termines how strongly the rate of change of the control
deviation affects the control variable. Td compensates
for rapid control deviations. A high Td means a smaller
and slower effect on the control variable. Td-values that
are too large can lead to instability of the controller.
Ts: Sampling time
The sampling time Ts (s) is the time interval over which
the control deviation is determined and the respective
control variable (dependent on Kp, Ti and Td) is cal-
culated.
Ts must be adjusted to match the response character-
istic (total of all time constants) of the closed loop con-
trolled system, so that the control variable can deliver a
uniform and measurable change in the control devia-
tion. Ts values that are too small or too large can lead
to instability of the controller.
Fluids:
Under the option "Fluids", a variety of heat transfer flu-
ids can be selected.
The selected fluid limits the setting range of the target
temperature. See table in the section “Fluids“.
The maximum and minimum temperature values of the
selected fluid can be set within these limitations.
Limits:
Under the option "External (ext)", the maximum and
minimum temperature for external temperature control
can be set.
Under "l Δ T (int - ext) l", the maximum difference be-
tween the internal and external temperature can be set.
Under "Power Output", the maximum heating output
can be set as a percentage.
Temperature sensor
The internal and external temperature measurement can
be calibrated and compensated for.
PUMP
Limits:
In “Limits“ option, the user is allowed to set the maxi-
mum and minimum speed to the pump, and also the
maximum pressure.
TIMER
Set:
The user can set a target time (duration).
When device functions are started normally, this time is
displayed on the working screen. The device functions
stop automatically once this time has expired. The run-
ning time is then displayed again on the display.
Note: To deactivate the target time specification, set
the target time to 00:00.
Display:
Activate the timer display on the main display (working
screen).
MODE
Operating Mode A:
After power-on/power failure no automatic restart of
functions.
Operating Mode B:
After power-on/power failure automatic restart of func-
tions, depending on previous settings.
Operating mode C:
Set values (set in A or B) cannot be changed.
After power-on/power failure automatic restart of func-
tions, depending on previous settings.