Miller Electric OM-842 - Manuel (Page 28)

OM-842 Page 24
5. Define the peak time and background time values as
desired.
Peak time is the length of time the pulse is at the peak
level. Background time is the length of time the pulse is
at the background level.
The ranges for both peak and background times are
0.5 to 5.0 seconds, in increments of 0.5 seconds.
6. Press Right/Increase, and the display shows:
# 0 X F R E Q U E N C Y =
X X .X X P U L S E S / S E C O N D
7. This display is for informational purposes. It indicates
the calculated frequency of pulses per second.
8. Press Right/Increase.
If the Process Selector switch is in the ac output posi-
tion, go to Section 5-2D. If the Process Selector switch
is in a dc output position, go to Step 9.
9. The display shows:
# 0 X A V G C U R R E N T =
X X X .X A M P S
10. This display is for informational purposes. It indicates
the calculated average current during pulsing.
11. Press Right/Increase, and go to Section 5-2D.
C. Procedure With Pulse Mode On, Pulses Defined
As A Frequency
1. The display shows:
# 0 X W E L D
T I M E = X X X .X
a. Define the weld current time as desired.
The range for weld current time is 0.0 to 999.9 sec-
onds, in increments of 0.1 seconds.
2. Press Right/Increase, and the display shows:
# 0 X P U L S E A p K = X X X .X
P U L S E A b K = X X X .X
3. Define the ApK and AbK values as desired.
ApK defines the peak current during pulsing. AbK
defines the background current.
The ranges for both ApK and AbK are 2.0 to 400 am-
peres, in increments of 1.0 ampere.
4. Press Right/Increase, and the display shows:
# 0 X P U L S E S / S E C = X X .X
P U L S E P E A K % = X X
5. Define the pulse frequency per second and the per-
centage of pulse time to be spent in pulse peak as
desired.
The range for pulse frequency is 0.1 to 10.0 pulses per
second, in increments of 0.1 pulses per second.
The range for percentage of pulse time to be spent in
pulse peak is 5% to 95%, in increments of 1%.
6. Press Right/Increase.
If the Process Selector switch is in the ac output posi-
tion, go to Section 5-2D. If the Process Selector switch
is in a dc output position, go to Step 7.
7. The display shows:
# 0 X A V G C U R R E N T =
X X X .X A M P S
8. This display is for informational purposes. It indicates
the calculated average current during pulsing.
9. Press Right/Increase, and go to Section 5-2D.
D. Procedure Following Pulse Mode Definition
1. The display shows:
# 0 X F I N A L S L O P E
T I M E = X X .X
2. Define the final slope time as desired.
The range for final slope time is 0.0 to 25.0 seconds, in
increments of 0.1 seconds.
3. Press Right/Increase, and the display shows:
# 0 X F I N A L
T I M E = X X .X A M P S = X X X .X
4. Define the final current time and amperage as desired.
The range for final current level time is 0.0 to 25.0 sec-
onds, in increments of 0.1 seconds. The range for final
level amperage varies from 2.0 to 400 amperes, in in-
crements of 1.0 amperes.
5. Press Right/Increase, and the display shows:
# 0 X P O S T F L O W
T I M E = X X .X
6. Define the shielding gas postflow time as desired.
The range for postflow is 0.0 to 25.0 seconds, in incre-
ments of 0.1 seconds.