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,
MAINTENANCE
INSTRUCTION MANUAL
Dlgllel hl"mmetcr
Models172,173
IMPORTANT
Measure
the
resistance
of
the
leads
and subtract
from
the
resistance
reading
on
the
Model
172/173.
2.
Low Ohms.
=)
Set
to
cl (OHMS
,I
b)
Set
to
LO.
c)
set
to
2 WIRE.
d)
Set
to AUTO.
e)
Connect
the
Df
!C
ade
Resistor
(D)
to
the
instrument
and
R source
terminals.
f)
Set
the
Decade
Resistor
to
the
resistance
specified
in Table
6-6.
Verify
the
readings
given.
TABLE
6-6.
Resistance
Performance
Check
(LO OHMS)
Range
Relative
Accuracy"
Absolute
Accuracy""
3oon
199.93
to
2DD.07Q
199.91
to
200.09
3KQ
I.9993
to 2.0007KQ
I.9991
to
z.ooogKn
30Kn
lg.993
to
20.007KR
lg.991
to
20.DO9Kn
300KR
199.91
to 200.09KQ
lgg.89
to
200.llKD
3MT:
I.9979
to
2.002lMn
1.9977
to 2.0023M1,
3OM:i
lg.899
to
20,lOlMS!
19.897
to 20.103Mfi
*Does
not
include
the
uncertainty
of
the
""Does
include
the
uncertainty
of
the
Resistance
Source.
Resistance
Source.
Resistance
Setting
200.00
2.0000K~
20.000KR
ZOO.OOKI!
2.0000MR
20.000M!:
I /
1
Allowable
Reading
(at
25.C)
IMPORTANT
Measure
the
resistance
of
the
leads
and
subtract
from
the
resistance
reading
on the
Model
172/173.
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