Diener femto, Руководство по эксплуатации, Страница: 131 / 156

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10.8 Gas consumption
The enclosed table should create an overview on the gas consumption:
The values are in relation to the max. flow per MFC. That means: at a MFC with 50 sccm we
originated from a gas flow of 50 sccm/min. per process.
To calculate your individual gas consumption, you find the formula below the table.
The individual gas consumption strongly depends on the suction power of your pump.
Formula:
1. Volume of bottle (litre) x volume (in bar) = volume (litre) at 1 bar
2. Volume at 1 bar x 1000 = t [minutes]
Gas flow in cm³
3. t [minutes] = t [hours]
60
Calculation example Femto (first line of table)
1.
2 l x 200 bar = 400 l (at 1 bar)
2.
400 l x 1000 = 20.000 minutes
20 cm³
3. 20.000
Min. = 333 hours
60