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OPERATING
INSTRUCTIONS
v
ext:
LINE GROUND:
GROUNDS:
CONNECTORS:
INSTRUCTION
MANUAL
Digital Mullimeler
Models 172A. 173A
internal
jumpers
(user
installed'select
internal
or
external
voltage
reference
for
user-installed
pullup
resistors
for
all
open-collector
outputs,
3r applies
internal
c5v
to v
internal
+5V is 48%).
(maximum
external
cuTrent
load
on
Minimum
pull-up
resistor
recom-
mended
is
4.7K.
One pin
on each
output
connector.
4 pins
for
digital
outputs,
2 pins
for
remote
control.
One 40-pin
card
edge and one 26-pin
card
edge.
ENVIRONMFNT:
Installed
in a 172A/l73A:
Operating
O'C to 55'C,
humidity
80% @ 35°C
Storage:
-25O
to +65'C
f.
Modifications
to Model
172A/173A
Specifications.
When operating
a 17ZA/173A
with
a
1722
in TRIGGER MODE, only
the
accuracy
specifications
for
the
top
two ohms ranges
change
as follows:
HI S 300M11 Range:
From 1% of
reading
to
1.5% of
reading.
HI R 30MS-I Range:
From 0.15% of
reading
to 0.2% of
reading.
LO R 30MQ Range:
From 0.5% of
reading
to
1% of
reading.
LO 0 3MR Range:
From 0.1% of
reading
to 0.15%
of
reading.
Also
when operating
in TRIGGER MODE, repeatability
of
readings
may be up to:
0.5% on 300MR Hi 0 and 30MR Lo n ranges,
and
0.05% on 30MR Hi 0 and 3MR Lo R ranges.
Accuracy
of
all
other
ohms ranges
and all
other
functions
is
not
affected
by the
Model
1722 when operating
in TRIGGER MODE.
3-22
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