Electronic Flow Controller (Efc-T) Module - Thermo Scientific EA IsoLink IRMS System Operating Manual

2
Analytical Principles
Pneumatic Circuit
Table 13. Pressure Regulators Pneumatic Diagram (Sheet 2 of 2)
Component
PRV2
PI2

Electronic Flow Controller (EFC-t) Module

The EFC-t module is common in all the configurations of the EA IsoLink IRMS System for CNSOH.
The module is schematically shown in
See Table
Figure 34. Thermo-regulated EFC-t Module Pneumatic Diagram
He
O
2
6.5 mL/min.
300 kPa
EFC - T
Table 14. Parts of the EFC-t Module (Sheet 1 of 2)
Component
He
O
2
F
EV1
EV2
EV3
EV4
S1
36 EA IsoLink IRMS System for CNSOH Operating Manual
Description and function
Oxygen pressure regulator
Oxygen pressure gauge
14.
F
F
EV1
2
3
1
3 1
EV2 2
S1
EVP1
1
2
Description and function
Helium inlet port
Oxygen inlet port
Stainless steel filter
Two-way solenoid valve to control oxygen inlet.
Three-way solenoid valve to control helium inlet and to allow switching between helium and
oxygen.
Two-way solenoid valve, normally open, to control the inlet of helium flowing back from the TCD
detector analytical channel. The valve is closed during the leak test.
Two-way solenoid valve, normally open, to control the inlet of helium flowing back from the TCD
detector reference channel. The gas leads to port 1 of the MAS Plus autosampler and then to the
ConFlo..
Electronic flow sensor for helium as carrier gas and oxygen during the sampling stage.
It cooperates with the EVP1 electronic controller (proportional valve).
Figure 34, and consists of the following components.
S2
EVP2 1
2
(5)
F
(6)
F
(7)
EV4
1
EV3
1
2
2
(4)
(1)
(2)
EFC-t
ASV
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