MAINTENANCE &TROUBLESHOOTING
29
4.5 Operation Environment
●
Height above sea level is below 1000m.
●
Operation temperature range: -10
0
C
～
+40
0
C.
●
Relative humidity is below 90 % (20
0
C), relative humidity is below 50 % (40
0
C).
●
The inclination of the power source does not exceed 10
0
.
●
Protect the machine against heavy rain or in hot circumstance against direct sunshine.
●
The content of dust, acid, corrosive gas in the surrounding air or substance cannot exceed
normal standard.
●
Take care that there is sufficient ventilation during welding. There is at least 30cm free distance
between the machine and wall.
§4.6 Operation Notices
●
Read 1 carefully before attempting to use this equipment.
●
Connect the ground wire with the machine directly and refer to 3.5.
Parameters of piping back sealing welding for mild steel
（
DCEP
）
Piping
diameter
Φ
/mm
Tungsten
electrode
diameter/mm
Gas nozzle
diameter/mm
Welding
wire
diameter/mm
Welding
current/A
Arc
voltage/V
Argon
flow rate
/
L
·
min
-1
Welding
rate
/
cm
·
min
-1
38
2.0
8
2
75
～
90
11
～
13
6
～
8
4
～
5
42
2.0
8
2
75
～
95
11
～
13
6
～
8
4
～
5
60
2.0
8
2
75
～
100
11
～
13
7
～
9
4
～
5
76
2.5
8
～
10
2.5
80
～
105
14
～
16
8
～
10
4
～
5
108
2.5
8
～
10
2.5
90
～
110
14
～
16
9
～
11
5
～
6
133
2.5
8
～
10
2.5
90
～
115
14
～
16
10
～
12
5
～
6
159
2.5
8
～
10
2.5
95
～
120
14
～
16
11
～
13
5
～
6
219
2.5
8
～
10
2.5
100
～
120
14
～
16
12
～
14
5
～
6
273
2.5
8
～
10
2.5
110
～
125
14
～
16
12
～
14
5
～
6
325
2.5
8
～
10
2.5
120
～
140
14
～
16
12
～
14
5
～
6
Notice: the above parameters originate from
《
Welding Dictionary
》
P167, Volume 1 of Edition 2.
Summary of Contents for ArcoMiG LCD 250C
Page 1: ...I ...
Page 3: ...CONTENT III ...
Page 34: ...MAINTENANCE TROUBLESHOOTING 34 5 3 Electrical principle drawing ...
