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Manufacturing,
Engineering
and
Sales
tince
I938
Phone:
617-527-4i85
Fax:617-964-3746
E-Mail:
sales@asrichards. com
Thermocouple
and
General lnformation
Extension Wire
-
-
Limits of
Error
Limits
of
Eruor
for
Thermocouple Wire
-
Limits
of
Error
for
Extension
Wire
-
.
Due to the
nonlinearity
of the Type
R
and
S
emf curves, the
degree
error introduced into a thermocouple system (ie. the thermocouple and
e*ension
wire) will vary with
temperature.
Consequently, the
degree
C and
degree
F toleraces shown in brackets,
applies
only
when the hot measuring junction
temperature is greater than 1598"F or
870"C.
D
I
Platinum,
30%
Rhodium
vs.
Platinum,
6%
Rhodium
870"C
to
1700"C
+4.5o/"
1
600"F
to
31
00"F
+0.5"/"
Nickel,
1
0%
Chromium
vs.
Constantan
0'C
to
900"C
+1
I"C
ar
*0.5% +1"C or
*A.4/"
32"F
to 1650'F
+3oF
or
+0.57"
+2"F or
+0.4"h
lron
vs.
Constantan
0"C to
750"C
*2.2C
or
+0.75"/"
+1
.1"C or
*0.4/"
32"F
to
1400"F
+4"F or +0.75% +2"F or
+0.4o/"
Ni,
10% Cr
vs.
Ni,
5%
Al,
si
0"C
to
1260"C +2.2oC
or
+0.75"/"
+1
.1"C
or +0.4/"
32"F to
2300'F +4"F or +0.75% +2"F or
+0.4"/"
Ni,
1
4%
Cr,
1
.5"/"
Si vs.
Ni,
4.5% Si,
.1%
Mg
0"C
to
1260"C
*2.2"C
or
+0.75o/"
+1
.1
oC
or
*A.4"/"
32"F to
2300"F +4"F or +0.75% +2"F or
+0.4"/"
Platinum
vs.
Plati num,1
3"/"
Rhodi um
0"C
to
1480"C
+1
.5"C
or +0.25%
32"F
to
2700"F
+3oF
or +0.25%
l.
I
eL
Platinum
vs.
Platinum,l}"h
Rhodium
0'C to
1480'C
*1
.5"C or
+A.25"/o
32"F
Io
2700"F
+3oF
or +0.25%
Copper
vs.
Constantan
0"C to
350'C
+1
"C or
+
0.75% +0.5'C or
+0.4o/"
32"F
to
660"F
+1
.B'F or +0.75%
+1
oF
or
+0.4"/"
q
tilffi:i1:"?ki!fi15ffil"
|
0"c
to2315.c
|
*++"c
or
x1"h
I
I
tr't
to
42oo"F
I
+BoF
or
+1o/o
I
Percent (%) refers to the measuring temperature,
not
the
range.
Tolerances in this table
are
not
for the accuracy of thermocouples that have been in
use.
They
are
only
for
readings during the
first
inital heating of the thermocouple
elements.
For cryogenic temperature materials
-
Phone for details.
Copper/Magnesium
vs.
Copper
32"F to 400"F
Ni,
1O%
Cr
vs.
Constantan
0"C to
200"C
lron
vs.
Constantan
0"C
to
200"C
32"F to
400'F
Ni,
10% Cr
vs.
Ni, 5% Al,
si
0'C
to
200'C
32"F to
400'F
32"F to
400'F
Ni,
1
4%
Cr,
1.5"/"
Si vs.
Ni,
4.5% Si,
.1%
Mg
0"C
to 200"C
Copper vs.
#11 Alloy
0"C
to 200"C
+.057mv
(*5'C) .
32"F to
400"F
+.057mv
(*9'F)
.
32"F to
400'F
Copper vs.
#11 Alloy
0"C
to
200'C t.057mv
(tS"C)
.
+.057mv
(*9'F)
.
32"F to 400"F
Copper
vs.
Constantan
0"C
to 200"C
+.11mv
Alloy
405 vs.
Alloy
426
0"C
to
200'C
32"F to 400"F
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