2 Overview
12
C58IB004EN-D
2.3.1 CCU 100 Front Panel
The front panel of CCU 100 contains all control but-
tons, status LEDs and the display.
Fig. 6: CCU 100 front panel with control elements
1
Mains switch
2
Display and keypad
All elements of the front panel are described in detail
in
2.3.2 CCU 100 Rear Panel
The rear panel of CCU 100 contains all the connec-
tors of the instrument.
Fig. 7: CCU 100 rear panel
1
Power connector
2
Connector air out
3
Connector air in
4
RS 232 connector
5
LAN connector (currently not used)
6
Low power module for DHS 1100
7
Connector Flow Sensor (not used for DHS 1100)
8
Connector OUT1/2 (optional connectors)
9
Connector Heater
10 Connector Sensors/Heater
2.3.3 Control of the Compressed-Air Cooling
The CCU 100 controls the compressed-air cooling
equipment.
In order to be able to cool the dome and housing,
the compressed-air source has to be connected to
the connector AIR IN on the rear panel of CCU 100.
If cooling is required (depending on the configura-
tion this could be dSP + 1 °C or < 200 °C, see
Chapter 5 ), a valve inside CCU 100 connects the
AIR IN to the AIR OUT connector, which is connect-
ed to the quick coupling connector for cooling air
supply at the DHS 1100 (Fig. 2-1,4).
In case that no cooling is required, the valve be-
tween AIR IN and AIR OUT closes.
2.3.4 Overheat Protection
DHS 1100 has a protective thermoswitch, which is
mounted inside the housing, to prevent overheating
of the instrument in case the air cooling system fails.
The thermoswitch interrupts the heating power cir-
cuit if the temperature of the chamber housing ex-
ceeds 115 °C.
CCU 100 automatically switches to Standby mode
(heater off) and shows an alarm (E04).
TIP:
A list of all error messages can be found in
2 1
1 2 3 4 5 6 7 8 9 10
CAUTION
Hot surface
When the compressed-air supply to the device
fails, the housing can have a
hot surface
.
Carefully check the temperature of the
DHS 1100 housing and make sure the housing is
at room temperature before you touch it.
Make sure that you have found and removed the
cause of the error before you continue operation
of DHS 1100 and CCU 100.
