prepASH Operating Instructions
Precisa
Ref01.i
36
12.2 Gas adjustment and hood control
Testing the Exhaust Fan
Gas adjustment:
Open a valve by touching the corresponding switch surface. The effectively measured gas flow is
indicated on the right. (Inlet pressure: Air 6 bar, O2 and N2: 3 bar)
If necessary, regulate the flow of the valve
(right hand side of the prepASH).
Increase flow by turning anti-clockwise.
Hood opening time:
The program allows the user to select the temperature at which the hood is half-opened after the
analysis. Here the user can program the time interval between half and fully opened hood.
