Fluke 732B - Page 60

732B/734A
Instruction Manual
4-6
–
+
U1
+11.5V
R3
Z1
R2 118 k
Ω
R1
50 k
Ω
R4
Z1
+
2.976V
–
REFAMP ZENER
CURRENT
CANCELLATION
CIRCUIT
10V
SENSE LOW
CURRENT
CANCELLATION
CIRCUIT
10V
SENSE HIGH
CURRENT
CANCELLATION
CIRCUIT
+11.5V
Q202
R403 8.823 k
Ω
R404 1 k
Ω
R401 6.2 k
Ω
R402
10V ADJUST 158
Ω
to 180
Ω
10V SENSE LO
10V SENSE HI
10V BIAS HI
10V HI 1.018V HI 1.018V LO 10V LO
Z1
10V
7.024V
1.018V
DIVIDER
10V BETA STRING WW RESISTOR SET
I
Z
I
Z
I
C
I
WW
I
WW
I
WW
I
C
I
C
+I
Z
U4
REFAMP
I
WW
k17f.eps
Figure 4-2. 10V Reference Circuit Block Diagram
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