WIKA GTU-10 - Handbuch (Seite 15)

15 WIKA operating instructions portable SF
6
gas transfer unit, model GTU-10
14051107.01 06/2013 GB/D
GB
6. Commissioning, operation
6.2 Instrument construction
1 Overpressure warning lamp
2 On/Off switch
3 Pressure display, inlet pressure
4 Operating hours counter
5 Pressure reducer
6 Pressure display, output pressure reducer
7 Pressure display output pressure
8 Valve coupling, input
9 Valve coupling, output pressure reducer
10 Valve coupling, output
6.3 Pumping out an SF
6
gas compartment into a gas cylinder
1) Connect the unreduced or reduced outlet with the gas compartment to be fi lled. Only
one of the two outlets should be connected.
Before switching on the GTU-10, the connection to the gas compartments should
be checked for leakage at the inlet and outlet. A leakage detector for SF
6
gas (e.g.
model GIR-10) should be used to test the connections.
2) Press the Start button in order to switch the compressor on. The gas will be pumped
from the inlet to the outlet.
If the tank pressure at the inlet is higher than that at the outlet, a pressure equalisa-
tion will occur.
Example: 7 bar abs. in inlet tank and 1 bar abs. on the outlet side will generate a
lower equalised pressure, e.g. 3 bar abs., in the connected system, depending on the
volume ratio.
For the pump curve, see page 21
3) After reaching the desired fi lling pressure in the tank being pumped out, the unit
should again be switched off and all connections disconnected.
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OI_14051107_GTU-10_GB_D.indd 15 13.06.2013 11:28:17