TC-10 User Manual
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version 3.9
page 12
3.6. Setting the DESIRED TEMPERATURE
There are two ways to set the DESIRED TEMPERATURE:
1.
The easiest way is to use the digital potentiometer DESIRED TEMP. / °C. The
temperature can be set from +03.0 °C to +60.0 °C, resolution: 0.1 °C. If the TC-10
leaves this temperature window the internal shut-off unit disconnects the power output.
This could be the case if the sensor is broken or short-circuited.
2.
If the user wants to have external control (e.g. with a computer system) the DESIRED
TEMPERATURE can be set using the COMMAND INPUT 10mV / °C connector (
10
,
Figure 1). The COMMAND INPUT is scaled 10mV / °C, i.e. +370 mV at this connector
would set the DESIRED TEMPERATURE to +37 °C.
Important
: The set value of the temperature is always the sum of the setting at DESIRED
TEMP. / °C potentiometer and the voltage at COMMAND INPUT 10mV / °C connector, i.e. if
DESIRED TEMP. / °C is set to +25.0 °C and the voltage at COMMAND INPUT 10mV / °C is
+150 mV the temperature will be set to +40 °C !!
Figure 5 gives an overview of the operation modes of the TC-10.
4. Grounding
To avoid ground loops the internal ground of the system is floating, i.e. it is not connected to
the protective earth of the line cable while the cabinet is always connected via the power supply
cable (green / yellow wire). The system can be grounded by connecting plug
21
, Figure 1
(protective earth) or
22
, Figure 1 (internal ground).