S xx.xx p x.xx – JULABO Magnum 91 Temperature System User Manual

Page 41

Temperature System Magnum 91

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 = 8 K¸

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

P x.xx

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 51)

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).