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11.5
Changing the temperature unit of
measurement from °C to °F
To toggle the unit of measurement for temperature readings from
°C to °F and back again, proceed as follows:
• Switch off the unit at the main switch ON/OFF. (The residual
heat display should no longer be enabled, see residual heat
Warning (HOT)).
• Hold the foil keys "Mode" and "Temp" pressed down and
switch on the main switch ON/OFF. After approx. 5 seconds the
display will begin to flash. Release the foil keys.
• Temperatures will now be displayed in the unit of measurement
selected. Temperatures in the memory will be converted accor-
dingly.
11.6
Setting the safety temperature
Setting and/or changing the safety temperature is only possible in
the operation mode A or B.
The safety circuit is set as follows:
Switch on the device by mains switch on the left side of the instru-
ment.
As soon as the display shifts to SAFE H (safety temperature limi-
ter of the heatin plate) (SV is blinking), press the foil key "Mode"
(SV is blinking no longer), keep this foil key pressed and set the
requested safety temperature with the rotary knob TEMP. The set
safety temperature (e.g. 100 °C) is displayed. After releasing the
foil key "Mode", SAFE H OK is displayed for about 2 seconds, and
the safety temperature is stored this way.
When the display changes to show SAFE P (safety temperature
limit for external sensors) (SV flashes), press the foil key "Mode".
The SV will stop flashing. Hold down the foil key "Mode" and turn
the knob TEMP to set the safety limit temperature required. The
safety temperature (e.g. 60 °C) will be displayed. Release the foil
key "Mode". After approx. 2 seconds, the message SAFE OK will
be displayed to indicate that the safety temperature has now been
stored in the memory.
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12
Function stirring
The motor speed is set on the rotary knob "Mot", (0 and/or 50 to
1200 rpm in steps of 10 rpm each). "SV" is blinking.
The function is started and stopped with foil key "Mot".
If the function "Stirring" is started, the motor runs smoothly to the
set speed, and the LED "Mot" beside the imprint "Mot rpm" shi-
nes green.
The display changes to real speed display.
12.1
Intermittent mode
If Intermit mode is active, "On IntErmit" will be displayed when the
device is switched on.
The intermittent mode interrupts the stirring cycle at regular inter-
vals. For example, if the function "Stirring" is switched on with
the setpoint speed set at 1 rpm the stirring cycle will be interrup-
ted for approx. 10 seconds after a cycle time of 60 seconds. The
cycle time and the length of the interruption can be modified via
the serial interface (see section 15.1).
The stirring bar breakaway monitoring function cannot be
enabled when the intermittent mode is enabled.
The intermittent mode can also be used with the special small stir-
ring bars. These can be used when the stirring bar breakaway
monitoring function is not enabled and will continue to stir the
medium even when the stirring bar breaks away. These stirring
bars are picked up once again when the speed drops cyclically.
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