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6.3 Selecting Gas Molecular Weights
The SDHmini default setting is for air (molecular weight 28.99), however, this
function allows the molecular weight to be set appropriately for other sample
gases, for example 18.99 .
6.4 Pressure
This sub-menu has, for both the primary and secondary displays, five options
allowing the user to select either
atmospheric pressure
or one of four
pressure
engineering units
and
applied pressure
.
When this function is selected, the main and secondary display screens will display
the pressure at which the dewpoint reading is calculated.
The SDHmini requires that a numerical pressure value be entered in the selected
units at the bottom of the units selection section, for example selecting pressure
dewpoint of 2,000 psig on secondary display.
Warning:
This function is purely an internal calculation and
DOES NOT
allow an
elevated pressure to be applied to the measuring head.
