Fluke 8050A Instruction Manual page 42

THEORY OF
OPERATION
CIRCUIT DESCRIPTION
ka.s
REFERENCE.
VOLTAGE
RANGEAND
C.
R
EAD
[
DE(-R)]
FOR
POSITIVE
UNKNOWN
INPUTS
FUNCTION SWITCHES
^
OVER^ANGE
.COMPARATOR
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u
C9
r"
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U20D
U20C
1
,C7
1
DE
(+R)
I
DE
(-R)
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DE
j+R)
DEifRj
Y\
C7
-<J
DE(+R)V^
1
FOR
I
NEGATIVE,
1
INPUTS
/