GE MG-101, Руководство пользователя

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Chapter 1. General Information
2 MG-101 User’s Manuall
1.2 Theory of Operation (cont.)
As shown in Figure 1 below, dry nitrogen enters at the dry gas inlet
A
, passes through the fixed internal pressure
regulator, and splits into the following three streams:
•
B
- dry gas “first dilution”
•
C - wet gas
•
D
- dry gas “second dilution”
Stream
B
(the dry gas “first dilution” ) is mixed with stream
C
(the wet gas) after it passes through the saturator bottles
to form a “Wet gas diluted” mixture (stream
E
). This is then mixed with stream
D
(the “dry gas second dilution” ) to
generate the desired output mixture (stream F ).
Obtaining an accurate output mixture requires careful adjustment of the rotameter valves as described in “Setup and
Operation” on page 5 . Calibration of all rotameters and the thermometer is traceable to NIST standards.
Note:
The rotameter scales are used in later steps to reference a lookup table. By themselves, they do not indicate
units of flow.
Figure 1: Flow Schematic
Regulator
Pressure
Dry Gas
Inlet
A
Dry Gas
Wet Gas
Flowmeter
5µ Filter
Temp
Saturator
Bottle
Gas
Outlet
B
C
D
E
First Dilution
Flowmeter
Dry Gas
Second
Dilution
Flowmeter
Wet Gas
Diluted
Flowmeter
F
Vent Valve
Dry Down
Valve