Julabo Presto Plus LH 47, Operating Manual

Page: 43 / 76

43
Note:
Requirement for an identification of the controlled system:
•
The temperature system must heat to a setpoint temperature
at least 10 °C above the previous setpoint using the adjusted
heating power.
•
When the adjusted control parameters Xp, Tn and Tv are too
high, this requirement may not be given with respect to on
how much the setpoint temperature has to change. In this
case, prior to carrying out an identification in the "OFF" state,
set the control parameters to lower values.
Recommended setting for internal control:
Xp = 1.0 °C
Tn = 80 s
Tv = 8 s
Setp.: 50.00°C
IntAct: 50.00°C
ExtAct: 50.00°C
Control: intern
Eprog: 50.00°C
IntAct: 50.00°C
Power: 50 %
Control: intern
Rs232: 50.00°C
IntAct: 50.00°C
Power: 50 %
Control: intern
S xx.xx
ID 0
R
REG+E-PROG
SERIAL
> Setpoint
The instrument provides three possibilities for setpoint selection.
The active mode is indicated on the DIALOG-DISPLAY (LCD).
The control indicator >R< (REMOTE) is illuminated in the header
of the VFD-Info-Display if setpoint selection is effected via the
EPROG or SERIAL input.
Possible parameters:
keyb- Setpoint setting via keypad (Setp.:) or via the integrated
programmer.
eprog - Setpoint setting via the analog interface REG+E-PROG
(3.1) connection with an external voltage or current source or
a programmer. (see page 53)
RS232 - Setpoint setting via the serial RS232/RS485 interface
(3.5) through a PC or superordinated data system.
>Autostart
Note:
The temperature system has been configured and supplied by
JULABO according to N.A.M.U.R. recommendations. This
means for the start mode, that the unit must enter a safe
operating state after a power failure (non-automatic start mode).
This safe operating state is indicated by "OFF", resp. on the
VFD-Info-Display. A complete shutdown of the main functional
elements such as heater and circulation pump is effected
simultaneously.
Only with setpoint adjustment the AUTOSTART-function can be
executed via >Taste< and >EPROG< (see above).