Sample Flow - Ametek 3050-AMS User Manual

Sample Flow

In the normal operation of the 3050-AMS Analyzer, the Zero module (the sec-
tion enclosed in the dotted line in Figure 1-2) is turned off so that the Sample
gas enters the analyzer and passes through diaphragm valve 2 (DV2). After
exiting DV2, the flow splits into two (2) paths: the Sample gas path and the
Reference gas path. The sample path flows through the first proportional valve
(PSV1) and the reference path flows through a dryer and PSV2. The two (2)
proportional valves (PSV1 and PSV2) control the flow rate of the gas streams.
They also determine which gas stream (Sample or Reference) passes through
to the QCM Sensor. By measuring the pressure drop across the capillary tube,
the 3050-AMS Analyzer provides a feedback signal (the flow rate of the Sample
gas) to the proportional valves. As a result, the 3050-AMS Analyzer alternately
exposes the QCM Sensor to a controlled flow of the Sample and dry Reference
gases.
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Figure 1-2.
Flow schematic for the 3050-AMS
sample manifold.
1-6 | 3050-AMS Moisture Analyzer
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PN 305804902, Rev A
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