2 Overview
14
B40IB006EN-D
2.4.1 CCU 1000 Front Panel
The front panel of CCU 1000 contains all control
buttons, status LEDs and the display.
Fig. 9: CCU 1000 front panel with control elements
1
Mains switch
2
Display and keypad
All elements of the front panel are described in detail
in chapter 6.2.
2.4.2 CCU 1000 Rear Panel
The rear panel of CCU 1000 contains all the con-
nectors of the instrument.
Fig. 10: CCU 1000 rear panel
1
Power connector
2
Connector Heater
3
RS 232 connector
4
LAN connector (currently not used)
5
Connector Flow Sensor
6
Connector OUT1/2 (optional connectors)
7
Connector Sensors/Heater
8
High power module for HTK 1200N
2.4.3 Overheat Protection
HTK 1200N has two devices to prevent overheating
of the instrument. The
flow control unit
of
HTK 1200N monitors the flow of cooling water
through the housing of the sample chamber. It is a
water flow dependent switch, which is connected to
CCU 1000. If there is not enough water flow,
CCU 1000 switches to Standby mode (heater off),
the Error LED on the front panel starts to flash and
shows an alarm message (E03).
In addition, a
thermoswitch
is mounted in the safe-
ty switch box for flange control (Fig. 3 (7)) to protect
the device from being overheated in case of a mal-
function. The thermoswitch interrupts the heating
power circuit if the temperature of the chamber
housing exceeds 70 °C. CCU 1000 automatically
switches to Standby mode (heater off) and shows
an alarm (E04).
TIP: A list of all error messages can be found in
chapter 10.1.
1
2
1 2 3 4 5 6 7 8
CAUTION
Hot surface
When the cooling water supply to the chamber
fails, the housing can have a
hot surface
.
Carefully check the temperature of the
HTK 1200N 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 HTK 1200N and CCU 1000.