Preset Of Cooling Temperature Of The Sample Chamber; Co -Bottle Temperature / Pressure Function - Leica EM CPD300 Operating Manual

7.6

Preset of Cooling Temperature of the Sample Chamber

The pressure chamber cools up to the preset cooling temperature (15°C factory
setting). The cooling temperature depends on the bottle temperature. Please see
chapter "7.6.1. CO
cooling temperature. The cooling unit automatically keeps the temperature at the
preset cooling temperature or below (see subchapter 7.6.1 below).
7.6.1 CO -Bottle Temperature / Pressure Function
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For correct filling of the pressure chamber with CO
minimum and a pressure difference of 5 bar is essential. Therefore, the pressure
chamber has always to be minimum 4 °C cooler than the CO
You can find the adjustment of pressure chamber temperature under "settings" (see
operating manual).
The factory preset cooling temperature of the pressure chamber is 15 °C. If the CO
does not fill the chamber within a certain time, "Timeout CO
box. If the poral filter is clean and the bottle is not empty the reason for the warning is
the CO temperature bottle which is cooler than the chamber temperature. This
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means, due to the low temperature difference, the pressure of the CO
not sufficient to fill-up the chamber.
The temperature of the bottle can be estimated by measuring the bottle surface with
a thermometer. The CO
surface. Decrease the chamber temperature according to the list below and fill again.
The green marked values indicate the optimal working temperature and pressure
range.
Example: If the bottle surface temperature is 22 °C the estimated CO
20 °C, the cooling temperature of the chamber should be set to 15 °C.
Fully open the shut-off valve of the CO
Page 29 Operating Manual EM CPD300 12/18
-Bottle Temperature / Pressure Function" to select the appropriate
2
temperature is then about 2 °C cooler than the bottle
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CO -Temperature (°C)
2
14
15
16
18
20
22
24
25
26
28
a temperature difference of 4 °C
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Recommended pressure chamber
cooling temperature (°C)
bottle.
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-Bottle (see list bellow).
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-IN" shows in the yellow
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in the bottle is
2
temperature is
2
9
10
11
13
15
17
19
20
21
23
2