Keithley 3720-ST

Section 4: Basic DMM operation Series 3700A System Switch/Multimeter Reference Manual
4-34 3700AS-901-01 Rev. D/June 2018
Type B inverse function polynomial
250 ºC to 700 ºC
(291 µV to 2,431 µV)
700º C to 1,820 ºC
(2,431 µV to 13,820 µV)
c
0
=
9.842 332 1 × 10
1
2.131 507 1 1 × 10
2
c
1
=
6.997 150 0 × 10
-1
2.851 050 4 1 × 10
-1
c
2
=
–8.476 530 4 × 10
-4
–5.274 288 7 1 × 10
-5
c
3
=
1.005 264 4 × 10
-6
9.916 080 4 1 × 10
-9
c
4
=
–8.334 595 2 × 10
-10
–1.296 530 3 1 × 10
-12
c
5
=
4.550 854 2 × 10
-13
1.119 587 0 1 × 10
-16
c
6
=
–1.552 303 7 × 10
-16
–6.062 519 9 1 × 10
-21
c
7
=
2.988 675 0 × 10
-20
1.866 169 6 1 × 10
-25
c
8
=
–2.474 286 0 × 10
-24
–2.487 858 5 1 × 10
-30
Error:
0.03 °C to –0.02 °C
0.02 °C to –0.01 °C
t
90
= c
0
+ c
1
E + c
2
E
2
+ c
3
E
3
... c
i
E
i
Where:
t
90
is the calculated temperature in °C.
E is the measured voltage in microvolts.
Type E inverse function polynomial
–200 °C to 0 °C
(–8,825 µV to 0 µV)
0 °C to 1,000 °C
(0 µV to 76,373 µV)
c
0
=
0.0
0.0
c
1
=
1.697 728 8 × 10
-2
1.705 703 5 × 10
-2
c
2
=
–4.351 497 0 × 10
-7
–2.330 175 9 × 10
-7
c
3
=
–1.585 969 7 × 10
-10
6.543 558 5 × 10
-12
c
4
=
–9.250 287 1 × 10
-14
–7.356 274 9 × 10
-17
c
5
=
–2.608 431 4 × 10
-17
–1.789 600 1 × 10
-21
c
6
=
–4.136 019 9 × 10
-21
8.403 616 5 × 10
-26
c
7
=
–3.403 403 0 × 10
-25
–1.373 587 9 × 10
-30
c
8
=
–1.156 486 0 × 10
-29
1.062 982 3 × 10
-35
c
9
=
–3.244 708 7 × 10
-41
Error:
0.03 °C to –0.01 °C
0.02 °C to –0.02 °C
t
90
= c
0
+ c
1
E + c
2
E
2
+ c
3
E
3
... c
i
E
i
Where:
t
90
is the calculated temperature in °C.
E is the measured voltage in microvolts.