15
!
Operating
28
13.8 Cooling
The refrigerated bath enables temperature controlling in the
circulator’s own bath below ambient or tap water tempera-
ture or to rapidly lower the temperature of a heated bath to
a lower level.
The attainable working temperature range is detailed in the
technical specifications.
13.9 RS232C Interface
The DC5-K75 is equipped with an RS232C interface 15.
For applications and commands see chapter 17.
13.10 The display cannot be altered
It can happen that the microprocessor ‘freezes’ under cer-
tain unfavorable external conditions e.g. mains voltage
surges or electro-magnetic disturbances. In this state it no
longer reacts to further entries and displays a random value
as the set value (e.g. -90
°
C) which cannot be altered.
The unit can be rendered operable again by a simple RESET
as follows:
1
Switch the unit off at the mains switch.
2
Keep the keys
and
simultaneously depressed
whilst you switch the unit back on again.
Release the keys as soon as you see the word
shown on the display.
The microprocessor is now reset to its basic default settings.
ALL other parameters must now be entered again.
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