reading on the oscilloscope is not 60KHz ±5%, adjust the
frequency using trimmer R162 on the control board;
-
the output voltage over dinse + and dinse is equal to 110Vdc
15%.
-
set up the ohmic load with the switch settings as in the table in
;
-
on the front panel use the encoder to position the current at
15A;
-
switch on the main switch;
-
start up on the ohmic load and make sure that:
- the waveforms displayed on the oscilloscope resemble
those in
;
- the output current is equal to +15Adc 20% and the output
voltage is equal to +15Vdc 5%.
- switch off the ohmic load and switch off the main switch.
- set up the ohmic load with the switch settings as in the table in
;
- on the front panel position with the encoder the current at 140A;
- start up the ohmic load and make sure that:
- the waveforms displayed on the oscillscope resemble those
in
;
- the output current is equal to +80Adc 10% and the output
voltage is equal to +23.2.Vdc 10%.
- switch off the ohmic load and switch off the main switch.
-
set up the ohmic load with the switch settings as in the table in
;
-
on the front panel position with the encoder the current at 140A;
-
start up on the ohmic load and make sure that:
- the waveforms displayed on the oscilloscope resemble
those in
;
- the output current is equal to +140Adc 5% and the output
voltage is equal to +26Vdc 5%; if the output current reading is
not 140A ±3%, adjust the current using trimmer IMAX R105
on the control board (
).
- switch off the ohmic load and switch off the main switch.
-
on the front panel set switch SW2 to TIG/2T (as high as it will
go) and switch SW3 to AC (as low as it will go).
-
connect the TIG torch to the machine.
-
set up the dual trace oscilloscope, connecting probe CH1 x10
to pin 1 of connector J3, on the control board (
), and probe
CH2 x 10 to pin 2. The earths are connected together to pin 3
on the same J3 connector;
-
set up the ohmic load with the switch settings as in the table in
-
on the front panel use the encoder to position the current at
15A;
-
start up the ohmic load, press the torch button and make sure
B) Rated load test:
fig. G
Fig. F
C)Intermediate load test:
fig. H
Fig. H
D) Rated load test:
fig. I
Fig. I
fig. 7
E) Testing operation of SCR module
fig. 7
Fig. J;
±
±
±
±
- 19 -
TECHNOLOGY TIG 172 AC/DC
FIGURE F
FIGURA E
FIGURE G
6
3
2
1
4 5
1 1 0 0 0 0
Number switch
Number switch
Number switch
Position switch
Position switch
Position switch
FIGURA E
6
3
2
1
4 5
2 2 2 2 1 0
FIGURE H
FIGURA E
6
3
2
1
4 5
3 3 3 2 2 2
FIGURE I
SETTINGS
· THE FREQUENCY IS
60KHz ±5%;
· AMPLITUDE CH1 IS
340V ±10%;
:
· PROBE CH1 x100;
· 100 V/Div;
· PROBE CH4 =1A;
· 10mV/Div;
· 5 sec/Div.
µ
VERIFY THAT
SETTINGS
· THE FREQUENCY IS
60KHz ±5%;
· AMPLITUDE CH1 IS
340V ±10%;
· AMPLITUDE CH4 IS 7A
±20%;
:
· PROBE CH1 x100;
· 100 V/Div;
· PROBE CH4 =5A;
· 10mV/Div;
· 5 sec/Div.
µ
VERIFY THAT
SETTINGS
· THE FREQUENCY IS
60KHz ±5%;
· AMPLITUDE CH1 IS
340V ±10%;
· AMPLITUDE CH4 IS
26A ±20%;
:
· PROBE CH1 x100;
· 100 V/Div;
· PROBE CH4 =10A;
· 10mV/Div;
· 5 sec/Div.
µ
VERIFY THAT
SETTINGS
· THE FREQUENCY IS
60KHz ±5%;
· AMPLITUDE CH1 IS
340V ±10%;
· AMPLITUDE CH4 IS
46A ±10%;
:
· PROBE CH1 x100;
· 100 V/Div;
· PROBE CH4 =20A;
· 10mV/Div;
· 5 sec/Div.
µ
VERIFY THAT
