Anton Paar TTK 600, Справочное руководство

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6 Operating CCU 100
D52IB001EN-G 41
6.4 Turning the Heater On and Off
Pressing the heater button turns on the heating
power supply to the heater inside the sample cham-
ber. The red and the green HEATER LED lights up
and the sample holder is heated to the temperature
set-point SP with the default heating rate. Changing
of the heating rate is described in the previous chap-
ter.
If the heater button is pushed again, heating is
stopped. Temperature set-point SP and ramp rate
SPR are reset to the default values. The green
HEATER LED is switched off.
6.5 Controlling the Cooling Device
The temperature of the sample holder is controlled
with a combination of cooling it with the cooling de-
vice and (counter) heating with the electrical heater.
The cooling device is automatically turned on and
off by CCU 100 whenever it is needed. At the same
time CCU 100 controls the power of the heater to
keep the sample holder on the defined temperature.
Active cooling from high temperatures (> 300 °C) is
not activated until the sample temperature reaches
300 °C. Going below this limit the CCU 100 auto-
matically switches on the used cooling equipment.
6.5.1 Controlling the Liquid Nitrogen Cooling
LN2 cooling is turned ON if the temperature set
point is below the Cooling Limit (CL). The COOLING
LED (see chapter 6.2.1) indicates that CCU 100
supplies liquid nitrogen to the sample chamber and
that the LN2 cooling is active.
The LN2 cooling is automatically switched OFF if
CCU 100 changes to Standby mode because of an
error and if the instrument is switched off complete-
ly.
TIP:
If you want to switch off the LN2 cooling at the
end of a measurement (target temperature = 25 °C),
you can set the Cooling Limit on CCU 100 to a value
below 25 °C).
dSP Allows changing
of the default
set point (25 °C)
for all three
types of cooling
modes from
15 - 50 °C. This parame-
ter is pass-
word
protected.
WARNING
Hot or cold surface.
There can be dangerously hot or cold surfaces
inside the sample chamber even if the heater
has been switched off. Always check on the dis-
play of CCU 100 that the sample holder tem-
perature is below 50 °C before you open the
sample chamber and touch any parts inside.
Parameter Description Note