Automatic Switching Valve Block (Asv) - Thermo Scientific EA IsoLink IRMS System Operating Manual

Table 14. Parts of the EFC-t Module (Sheet 2 of 2)
Component
S2
EVP1
EVP2

Automatic Switching Valve Block (ASV)

Allows the automatic switching from the combustion N,C, S configurations to the pyrolysis O, H
configuration, and vice-versa. The module is schematically shown in
following components. See
Figure 35. Automatic Switching Valve Bock Pneumatic Diagram
Reference Gas
Carrier Gas
AUTOMATIC
SWITCHING BLOCK
(5)
(2)
(1)
(4)
COMBUSTION NCS
Thermo Scientific
Description and function
Electronic flow sensor for helium as reference gas. It cooperates with the EVP2 electronic
controller (proportional valve).
Electronic flow controller for helium as carrier gas and oxygen to control the flow rates of gases
according to the flow values set.
Electronic flow controller for helium as reference gas to control the flow rate according to the
required flow value.
Table
(5)
EV1
(2)
1
EV2
(1)
3 2
1
EV3
(4) 3
2
1
EV4
2
3
HO
(7)
NCS
(6)
(8)
MS
Purge HO
(9)
(3) Purge NCS
ASV
EFC-t
15.
1
2
HO
(7)
NCS
(6)
MS
(8)
Purge HO
(9)
Purge NCS
(3)
AUTOMATIC
SWITCHING BLOCK
HO
(5) (7)
NCS
(6)
(2)
(8)
(1) MS
Purge HO
(4)
(9)
Purge NCS
(3)
HIGH TEMPERATURE MODE
PYROLYSIS, O, H
EA IsoLink IRMS System for CNSOH Operating Manual
2
Analytical Principles
Pneumatic Circuit
Figure 35, and consists of the
37