Tweco 1000 Merlin(Sept1999) - Manual (Page 16)

INTRODUCTION 12 Manual 0-2731
2. Gas Pressure Interlock
A pressure switch acts as an interlock for the
plasma gas supply. If the plasma gas supply pres-
sure falls below minimum requirements the pres-
sure switch will open, shutting off the power to
the contactors, and the GAS indicator will go out.
When adequate plasma supply pressure is avail-
able the pressure switch will close, allowing power
to be resumed for cutting.
NOTE
There is no gas pressure interlock for secondary
gas.