Tweco Merlin 6000GST Master PS - Manual (Page 46)

OPERATION 4-8 Manual 0-2652
C. Gas Pre-Flow Delay (SW3)
ON
OFF
1 2
SW3
A-00993 Logic PC Board
Figure 4-10 Gas Pre-Flow Delay Switch SW3
Location
The pre-flow delay allows time for gases to flow to
the torch when the torch is activated. Pre-flow is im-
mediately followed by pilot arc initiation. Pre-flow
is factory-set at 0.5 seconds, but can be reset to 2, 3,
or 4 seconds as desired. Extended torch leads may
require longer pre-flow durations.
Pre-F lo w T ime
(Seco n d s)
SW 3-1
Po sitio n
SW 3-2
Po sitio n
0.5 * 0 (O ff) 0 (O ff)
2 0 (O ff) 1 (O n)
3 1 (O n) 0 (O ff)
4 1 (O n) 1 (O n)
* = F actory Setting
D. Gas Post-Flow Delay (SW4)
ON
OFF 1 2
SW4
A-00994
Logic PC Board
Figure 4-11 Gas Post-Flow Delay Switch SW4
Location
Post-flow delay allows gases to flow after the main
cutting arc is interrupted. Post-flow is factory-set at
10 seconds, but can be reset to 5, 20, or 40 seconds.
P o s t-F l o w T i m e
(S e c o n d s )
S W 4 -1
P o s i ti o n
S W 4 -2
P o s i ti o n
5 0 (O f f ) 1 (O n )
1 0 * 0 (O f f ) 0 (O f f )
2 0 1 (O n ) 0 (O f f )
4 0 1 (O n ) 1 (O n )
* = F a ct o ry S e t t in g