User Manual

After pressing the button “input” the actual programmed value of the temperature ramp is displayed. In the e-
xample it is 6.0° per minute.
This means, that the internal set point value will be achieved by a ramp of 6.0°C per minute
A selected value of 0.0 put the ramp function out of duty, that is the nominal set point temperature will be a-
chieved without delay.
The „nominal set point value“ is the value, which appears after short pressing the mode button.
The “actual set point value” is an internal value, which will be evaluated based on the ramp adjustment and
nominal set point value, as well as on the prehistory.
When you turn on the controller the ramp starts at the actual Process-Temperature, the actual set point tem-
perature align first with the process temperature. In all other cases is the starting point the actual (internal)
set point temperature.
3.7 Host Mode
When the controller receives signals via the serial interface, then they are decoded and identified commands
implemented. The measuring data, display and controlling keep going.
There is no visualisation on the display during the interface access. Altered values will only then be
implemented, when the command u_o_o is sent. This happened automatically by using the TCCOM
for Windows, but has to be considered by using your own control program.
In case of uncertainty whether all values have been implemented, it is recommendable after the al-
tering of the configuration to turn off and on the controller thereafter!
3.8 Over Range Condition
If the process value falls below -75.0°C or exceeds +175°C, so the controller falls into a temporary error
status. The display shows flashing “9999”. The power output is switched off. The instrument checks consis-
tently the measuring value. If the value returns within the allowed limits, the controller turns automatically
back to the base status.
Please note, that only in the range of -50.0 … + 150.0°C the compliance with the parameter is guaranteed.
3.9 Error Messages
Nicht fatale Fehler werden als Ennn nicht blinkend für 5 Sekunden ab ihrer Erkennung angezeigt, danach geht
das Gerät in den Normalbetrieb zurück. Fatale Fehler werden dauernd angezeigt.
Non fatal errors will be displayed as „Ennn“ for 5 Seconds, not blinking, from its detection, thereafter the con-
troller returns to the normal operation. Fatal errors are consistently displayed.
Error Number Meaning Error cause – and removal
Non fatal error
E001 General error several causes
> contact factory
E002 Error of writing the EEPROM The writing of the configuration value has failed
> repeat configuration-step
> contact factory
CoolTronic GmbH Operation Manual Peltier Controller TC2812 Page 11 / 16
Revision: 1.15, Date: 30. Januar 2008 20080130_TC2812_MAN_E