27
Rotavapor
R-220 EX
5 Operation
Display
The upper display always indicates the current bath tempera-
ture. The lower display provides other information, depending
on what is selected. In the default state, the setpoint bath
temperature is displayed. The display cannot be changed
unless the heating is turned on.
Pressing „
DISPLAY MODE
“ once changes the display to
„Heat output“ (<
%P
> LED illuminates) for 10 seconds. This
figure is the clock frequency of the heating.
Pressing “
DISPLAY MODE
” twice displays the vapour
temperature (<
VAPOUR °C
> LED blinks). After 10 seconds
the display returns to the default state (setpoint bath tem-
perature).
The LED on the „
HEATER ON/OFF
“ key illuminates when
the heating process is started.
If there is an error, the <ERROR> LED illuminates and a cor-
responding code is provided in the upper display (P184 ap-
pears if the vapour temperature sensor is not connected).
5.2 Setting the Parameters
Bath temperature
The setpoint for the bath temperature can be changed at
any time using the „UP“ and „DOWN“ arrows on the Control
Unit.
Pressing the „HEATER ON/OFF“ key activates the heater.
This is indicated with an LED in the keypad.
The heating is clocked in order to guarantee precise heat
regulation. This means that the heating is controlled in ever
smaller clock-pulse rates the closer the actual temperature
of the bath comes to the setpoint temperature. The heat
output can be displayed in percent by changing the display
to <%P>.
The <HEATING> LED also controls the heat output. It only
illuminates when the heater is triggered and thus the bath
is being heated.
Make sure that the selected temperature is within the permis-
sible max. temperature (135°C for T4 and 150°C for T3)
Fig. 5.2: Controll Unit
