Control Of Medium Temperature; Operation With External Temperature Sensor Pt 1000.60/61 (Only For Hbr 4 Control); Stirring Function - IKA HBR 4 digital Mode D'emploi

The desired medium temperature can be set between 0 and 200
°C with the control knob (B), but not higher than the set safety
temperature. The value set can be read off on the digital display
(C) (Fig. 12). The heating function is switched on and off by press-
ing the button "Temp. On/Off" (F). If this function is activated the
green LED next to the lettering "Temp" lights up. The heating bath
is heated up to the set temperature. On the LCD display the set
temperature, actual temperature and the PV symbol are displayed.
The set temperature and actual temperature relate to the me-
dium. During the heating phase the colour of the LED changes
between green and yellow. If the yellow LED lights up this means
that the heating system is being supplied with energy. If the heat-
ing function is switched off using the sensor key and the medium
has reached a temperature of above 50 °C the yellow LED flashes
(20% on 80% off).

Operation with external temperature sensor PT 1000.60/61 (only for HBR 4 control)

The supplied external temperature sensor PT 1000.60/61 can be
used as a setpoint transmitter for controlling the temperature of
media, by using a vessel (e.g. glass flask) which is immersed in the
water or oil bath.
The sensor tube must be of sufficient length to be immersed in
the medium to be tempered (at least 20 mm) and fixed in position
on the vessel.
If the temperature sensor PT 1000.60/61 is connected to
the interface, the temperature regulation is automatically
controlled by the external sensor!
The temperature sensor PT 1000.60/61 is not intended to act as a
temperature sensor for the heating bath.
If the sensor is immersed directly in the heating bath (which is
considered misuse) and is at the bottom of the bath, control devia-
tions of up to +/-4 K can occur.
With the button "Mode" (D) the correcting variable desired (set
speed) can be preselected. With the control knob (B) the desired
speed of the stirrer drive can be set between 0 and 800 rpm in
steps of 50 rpm. The value set can be read off on the digital display
(C) (Fig. 15).
The stirring function is switched on and off by pressing the but-
ton "Motor On/Off" (E). If this function is activated the green LED
lights up next to the lettering "Mot." The motor runs gently up to
the speed set. On the LCD display the set speed, actual speed and
the PV symbol are displayed (Fig. 16).

Control of medium temperature

Stirring function

On the LCD display °C and HOT are displayed alternately (Fig. 13
and 14). The temperature of the heating element is limited by the
safety temperature set. The medium temperature is controlled by
a fuzzy logic controller. The medium temperature is measured by
a PT 500 temperature sensor and is heated up as quickly as pos-
sible without overshooting to the set temperature. The fuzzy logic
controller automatically adapts to the various heat capacities of
the different heat transfer fluids. This guarantees an optimal tem-
perature management without temperature drift and waviness.
An error message (Er 5) will appear if the sensor value of the exter-
nal sensor does not change within a certain period of time (adjust-
able Error 5 response time 1 ... 30 min), e.g., because the sensor is
not immersed in the medium.
This detection is activated only at differences > 5 K be-
tween the sensor temperature and the target temperature,
when the sensor temperature remains constant (+/- 0.5 K).
Setting the response time of error 5:
When "Er 5" appears on the display, press and hold the button
"Mode" (D) and at the same time set the desired response time
(1...30 min) by turning the control knob (B) .
Note:
0 min (zero) means the monitoring is switched off (OFF)!
If both functions (heating and stirring) are switched off, the LCD
display always indicates the set temperature set. When the heating
function is switched on it is given priority on the LCD display.
If the stirring function is started with the sensor key or called up
using the button "Mode" (D), the system switches over to speed
display for five seconds. With the button "Mode" (D) the LCD dis-
play can be changed from temperature to speed and vice versa
at any time. After five seconds the system switches back to the
predominant mode.
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