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NI 4071 7½-Digit FlexDMM Calibration Procedure
|
© National Instruments
|
151
1 M
1 M
52
+
1.
2
5 +
1.
2
15
100 k
100 k
50 + 10
5 + 4
9
10
k
10
k
48 + 20.
5
5 +
20
.5
12
.5
‡
1 k
1 k
48
+
20
0.
5
5 + 20
0.
5
17
.5
‡
10
0
10
0
56
+
20
04
8 +
20
02
.5
67
.5
‡
*
T
he Fluke
57
20 Specification
is a 90-
day
95% confidence specifi
cation
that
is
includ
ed in the 24-
Hour
T
oleran
ce.
†
M
eas
ur
ed
w
it
h a
1 G
stand
ard
resistor
.
‡
Flu
ke 572
0A specification
s include der
ating
for under
curr
ent
adder
and use of c
alibra
tor ac
tive
compens
atio
n. These
spe
cifica
tions
should be combine
d
w
ith
both the 2-year
and
24-hou
r tolerance
of the PXI-4071.
Tab
le 2
4
.
NI 4071
2-Wire Resist
ance V
e
rifi
cation T
o
lerances
(C
ontinue
d)
Cal
ibrator
Re
sist
an
ce
Range
2-Y
ear T
o
leran
c
e
(ppm o
f Calib
ra
tor Res
ist
anc
e +
ppm
of Ran
g
e)
24-Hou
r T
o
leranc
e
± (NI
4071
S
p
ec
ifica
tion
+ F
luke
572
0 S
p
ecifi
catio
n)
NI
4071
S
p
ec
ific
ation
± (ppm
of Cali
brator Res
ist
anc
e +
ppm
of Ran
g
e)
Fluk
e
5
720 S
p
eci
ficati
o
n
*
± (ppm
of Outp
ut)