a.
FIRING CIRCUIT ADJUSTMENT
V e r
i
c c
A C
D C
V o l t m e t e r
T
7 0 c
D
0
0
0
r - -
-
,
0
GINT
e= -
@
+ -
D C
A m m e t e r
L o a d r es i st o r
D C
Vo ltm e t e r
I V
t
Vn o m
V o u t
P 5 3
P52 T9
TA
Fi r i n g c i r c u i t a d j u st m e n t
F i g u r e
3 5
MOD E L
LOAD RESISTOR ( MIN)
B32-5 R
0- 10
ohms
5 A
B32-10R
0-5
ohms 10 A
B32-20R
0-2, 5
ohms
20 A
BJ2-30R
0-2
ohms
30 A
B60-2 , 5R
0-30
ohms
2, 5 A
B60-5R
0-15
ohms
5 A
B60- 10R
0- 7
ohms
10 A
B60- 1 5R
0-5
ohms
15 A
T
70 e
1. Connect RAC PAC as shown . "S ense" switch at "INT' ' . S4 at "NORMAL'' .
OVP is off.
2 . Set the variac for 220 V line.
3. Check TC : T9 . Correct value 12
�
0 , 7 V.
4 . Connect an os cilloscope b etween TC and TA. (TC=ground) .
Adjust P53 for an
8
V p-p s aw-tooth. DC level :
+
12 V to
+ 4
V .
5 . Check that the saw-tooth does not change for 20 0-240 V line.
4 0