M&C TechGroup CSS Series Operator's manual - Manual (Page 16)

16
Gas sampling and gas conditioning technology 4-1.1-ME
9 FUNCTION
The gas flow schematic of the CSS is shown in the following illustration.
13 12
11 10 9 7 4
5 8 6
3
2 1
F G H
D E
C
FM1 FM2
A B
B2
FI1 M1
B1 E1 Y1
Y2 Y3 M1
CSS; CSS-3
Zero
gas
Span
gas
9
7 4
C
B1
E1
Y1
M K L
CSS-2
3
L F K
13 12
11 10
Zero gas Span gas 1
9 7 4
5 8 6
14 15
2 1
G H
D E
C
FM1 FM2
A B
B2
Fl1 M1
B1
E1 Y1
Y2 Y3 M2
I
Span gas 2
15.1
Y4
6.1
Span gas 3
Y5
6.2
Span gas 4
Y6
6.3
N
15.2 15.3
J
CSS/C; CSS-3/C with option 03G9030 (a)
Figure 6 Gas flow schematic
Principally, there are two main ways for gas to enter and flow through the CSS:
- sample gas flow (C, 4, 7, 9, 10, 12 and 13, D and E);
(version CSS-2 additional: M, 7, K);
- test gas flow (F or G, 5 or 6, 4, 7, 9, 10, 11, 12 and 13, D or E)
(Version CSS.../C: F or G, 5 or 6, I, 2, C, 4, ... see above).
The gas sample pump (10) transports the sample gas via the gas sample probe, consisting of a sam-
ple tube (1) and a filter (2), to the CSS. The heated sample line (3) is connected at the sample gas
inlet (C). In order to prevent early condensation of the sample gas, components (2) and (3) are
heated.
In the measuring mode, the 3-way solenoid valve (4) allows the flow to the gas cooler (7).
The dew point of the gas is maintained at a stable value of +5°C +/- 0,1 °C (for further specifications
see appendix).