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Figure 9 General View of Peltier Control Unit
5.5.2 Handling of Peltier Control Unit
Operation of the control unit is carried out with the help of four keys (2). Operation structure is divided into two
levels, i.e. each key has two functions. After switching on the device is on the upper user level. The upper
user level comprises commands UP, DOWN, START and STOP:
UP = increasing of set temperature;
DOWN = decreasing of set temperature;
START = starting control, for safety reasons, this button must be pressed for at least 3 seconds, the
display of operation mode changes from STOP to START;
STOP = finishing control or switching into upper control level if button is pressed for at least 3 seconds; in this
control level the set temperature can be set as well as start and stop control process (heating ON or OFF).
Change of a set value with the help of UP and DOWN keys:
Change begins always in decimal digit of a set value. Cursor jumps to the next higher digit (for example to the
unit digit or tens digit) in case of more long hold of key UP or DOWN. Approximately in 3 s cursor
automatically returns to the smallest digit. Entry must not be confirmed. The last entry is used.
Input of digital values:
Input of digits is possible only in case that entry option designated with an arrow (→) has been selected in
menu. Then by means of repeated press of NEXT key digits 1, 2, 3, ..., 9, 0, decimal point and minus sign are
displayed. It is necessary to press ENTER key to confirm selected digit or sign. After that one inputs the next
digit in the same way. The whole number and the end of input are confirmed by double press of ENTER key.
Note: Using this key combination, the device can be restarted from memory data even after a possible loss.
UP + DOWN
It displays software version number and temperature inside instrument
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