IKA HB 4 basic - Manual (Page 11)

The device is switched on with the 2-pole ON/OFF mains switch (A).
When switched on the lamp in the rocker switch lights up green.
IKA HBR4 digital and HB4 digital
When activating the HBR4 digital and HB4 digital devices an auto-
matic self-test is carried out, all LEDs flash and all segments (fig. 1)
are visible on the LCD display. After this, the LCD displays in figure
2 to figure 5 are visible (standard factory setting).
When setting the safety circuit an upper temperature limit between
50˚C and 210˚C is set. The safety circuit can only be set in operating
mode "A".
♦ Switch on the device.
♦ Within 5 seconds of the display fig. 6. appearing, keep the mode
button (E) pressed down and set the safety temperature desired
by simultaneously turning the control knob (B).
♦ Release the mode button (E). For two seconds the safety tem-
perature set and safe OK fig. 7 is displayed; the safety tempera-
ture set is saved.
The safety circuit is automatically checked each time the device is
restarted.
IKA HB4 basic
A safety temperature limiter takes precedence over the main con-
troller which works independently from the closed loop control cir-
cuit. The safety temperature is set with a small screw driver on the-
setting axle (K). The end of the slot opposite the flattening is used as
a setting mark.
If the heating bath is used as a water bath, the safety temperature
limiter is to be set to the symbol H
2
Omax.
When the safety temperature is reached the device switches off
permanently. Only once the heating bath has cooled down some-
what can it be restarted by pressing in the red safety button (L) for
example using a small screwdriver.
IKA HBR4 digital and HB4 digital
The device can be operated in three different operating modes (dis-
play see fig. 8 to fig. 10). To toggle from one operating mode to the
other keep the mode button (E) depressed when switching on the
device (min. 5 secs). Sequence A-B-C-A-B-C-A- etc.
Operating mode "A" This operating mode is the factory setting of
the device. When switching on the device the heating and stirring
functions are deactivated. The set values last set are saved and are
used when the heating or stirring functions are switched on. The set
values can be changed.
Operating mode "B" When switching on the device the state of
the heating and stirring functions are taken over before the device
was switched off last as well as the last values set. The set values
can be changed.
Operating mode "C" When switching on the device the state of
the heating and stirring functions are taken over before the device
was switched off last as well as the last values set. The set values
cannot be changed.
11
HB4 0596
Operating modes
Setting the safety circuit
Starting
BA_HB4 30.06.2003 10:07 Uhr Seite 11