Pressure Dewpoint - WatchGas BAT-1 User Manual

WatchGas BAT-1, 2, 3 Breathing Air Quality Test Kit
Full Compliance with BS EN12021

7. Pressure Dewpoint

To establish pressure dewpoint, take the point where the water tube reading in mg/m
off pressure dewpoint from the vertical scale
NOTE:
Pressure dewpoint is the temperature at which free water is likely to occur at system pressure, therefore this will be
the minimum operating temperature of the system.
NOTE:
The above graph is for a guide only and can be used to estimate dewpoint from reasonably high water level
readings. These dewpoints are normally obtained in systems with little or no drying capability. Refrigeration dryers
normally produce dewpoints around +3
obtained and the above graph should not be for calculating water at these low levels <250 mg/m
C at 7 bar g. For desiccant systems dewpoints of better than -40
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User Manual
intersects system pressure and read
3
3.
D e t e c t i o n D e t e c t i o n
C can be
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