Tweco 186 DC Inverter - Manual (Page 46)

INSTALLATION, OPERATION AND SETUP 3-16 Manual 0-5237
186 AC/DC INVERTER INSTALLATION/SETUP
3.11 Short Circuit Protection While Welding
To prolong the useful life of a TIG tungsten electrode and eliminate tungsten contamination to welding point, the
186 AC/DC incorporates special circuitry.
In all TIG processes, after the welding arc has established, if the tungsten electrode touches the work the current
defaults to 33 amps. If the short exists for more than 1-2 seconds, the output is turned off.
In STICK mode, if the electrode touches the work for more than two seconds the welding current is reduced to
0 Amps.
3.12 Victor Regulator
Pressure regulator (Figure 3-7) attached to the cylinder valve reduce high cylinder pressures to suitable low working
pressures for welding, cutting, and other applications.
FLOW GAUGE
HIGH PRESSURE
GAUGE (SUPPLY)
INLET
CONNECTION
OUTLET
CONNECTION
PRESSURE
ADJUSTING
SCREW
A-09414_AB
Figure 3-7: Victor CS Regulator
!
WARNING
Use the regulator for the gas and pressure for which it is designed. NEVER alter a regulator for use
with any other gas.
NOTE
Regulators purchased with open 1/8", 1/4", 3/8", or 1/2" NPT ports must be assembled to their intended
system.
1. Note the maximum inlet pressure stamped on the regulator. DO NOT attach the regulator to a system that
has a higher pressure than the maximum rated pressure stamped on the regulator.
2. The regulator body will be stamped “IN" or “HP" at the inlet port. Attach the inlet port to the system supply
pressure connection.
3. If gauges are to be attached to the regulator and the regu lator is stamped and listed by a third party (i.e.
“UL" or “ETL"). The following requirements must be met:
a) Inlet gauges over 1000 PSIG (6.87 mPa) shall conform with the requirements of UL 404, “Indicating
Pressure Gauges for Compressed Gas Service."
b) Low pressure gauges must be UL recognized for the class of regulator they are being used on accord-
ing to UL252A.