Ametek WDG-V, User Manual

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PN 9000-133-VE, Rev U
Setting the Flow
The recommended initial aspirator pressure setting is 3 PSI. This will vary
depending on the pressure/vacuum of the process for which the WDG-V is
installed. If you purchased the AMEVision Display User Interface, you can use
the Flow Sensor output diagnostic screen to set the flow to the ideal rate. If
you do not have the AMEVision Display User Interface, it is recommended to
adjust the aspirator until you get a response from the analyzer, then increase
the pressure by 0.25 to 0.5 PSI.
Setting the Flow Using the Display User Interface Flow
Sensor Diagnostic
The internal flow sensor output is displayed is percent to ideal sample loop
flow. For example, a reading of 100 % indicates ideal flow whereas a reading of
50 % indicates half the ideal flow rate. The update interval for the flow sensor
is 90 seconds, so you must wait at least 90 seconds for the flow output value to
change. It is recommended to operate the sensor between 80 % and 120 %.
A low flow alarm is generated when the flow is 45 % or lower.
To set the flow, first adjust the aspirator pressure regulator until you get a
response from the analyzer. Wait 90 seconds and check the flow sensor output.
Adjust the aspirator as necessary until the flow sensor reads approximately
100 %. Small increments of 0.25 PSI are recommended.
Figure 2-24.
Flow Sensor screen.
Installation and Start-Up
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