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INSTRUCTION
MANUAL
Dlgltsl MultImeter
Models 372, 173
THEORY
OF OPERATION
TABLE
5-6.
Display
Data
MUX Lines.
8
LINES
DRIVES
DISPLAY
SEGMENT OF INDICATOR
LIGHT
DURING
-
t5
I
t4
'3
t2
-_
~~~
_~-
-.
tl
t0
a
a
a
a
a
a for
last
L! of
t,,
mV indicator-173
Off
other
half
mV/mA indicator-172
b
b
(b
b
b
/
b for
last
', of
tl ,
V indicator-173
I
I
I
Off
other
half.
V/A
indicator-172
:
ic
c
ic
',
C
c
Same as above.
uA indicator-173
not
used-172
d
d
d
d
id
d
Same as above.
mA indicator-173
not
used-172
I
e
e
e
e
e
e
Same as above.
A indicator-173
not
used-172
f
f
f
f
f
j
AC indicator
C indicator
/
/
all
of
t,
9
g
/
g
g
g
/
g for
last
5 of
ti
k::
indicator
Off
other
half
dp
dp
dp
dp
dp
"-"
indicator
MT? indicator
All
of
t,
POLARITY--
ov
I
OMSl'
OA
!
---
FIGURE
26.
Digital
Display
Multiplex
Scheme.
CB
5-
I I
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