Page 29 Operating Manual EM CPD300 12/18
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
2
-Bottle Temperature / Pressure Function” to select the appropriate
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
2
-Bottle Temperature / Pressure Function
For correct filling of the pressure chamber with CO
2
a temperature difference of 4 °C
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
2
-Bottle (see list bellow).
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
2
does not fill the chamber within a certain time, “Timeout CO
2
-IN” shows in the yellow
box. If the poral filter is clean and the bottle is not empty the reason for the warning is
the CO
2
temperature bottle which is cooler than the chamber temperature. This
means, due to the low temperature difference, the pressure of the CO
2
in the bottle is
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
2
temperature is then about 2 °C cooler than the bottle
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
2
temperature is
20 °C, the cooling temperature of the chamber should be set to 15 °C.
CO
2
-Temperature (°C)
Recommended pressure chamber
cooling temperature (°C)
14
9
15
10
16
11
18
13
20
15
22
17
24
19
25
20
26
21
28
23
Fully open the shut-off valve of the CO
2
bottle.
Summary of Contents for EM CPD300
Page 1: ...From Eye to Insight OPERATING MANUAL EM CPD300 167180032 Version 12 18 ...
Page 30: ...Page 27 Operating Manual EM CPD300 12 18 Press Start to activate program Test ...
Page 48: ...Page 45 Operating Manual EM CPD300 12 18 After software update press back ...
Page 52: ...Page 49 Operating Manual EM CPD300 12 18 Remove poral filter with spring from the nut ...
