Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User’s Manual Temperature Equations F-5
Table F-6
Type R inverse function polynomial
-50°C to 250°C
(-226µV to
1,923µV)
250°C to 1,200°C
(1,923µV to
13,228µV)
1,064°C to 1,664.5°C
(11,361µV to
19,739µV)
1,664.5°C to 1,768.1°C
(19,739µV to
21,103µV)
c
0
= 0.0 1.334 584 505 × 10
1
-8.199 599 416 × 10
1
3.406 177 836 × 10
4
c
1
= 1.889 138 0 × 10
-1
1.472 644 573 × 10
-1
1.553 962 042 × 10
-1
-7.023 729 171
c
2
= -9.383 529 0 × 10
-5
-1.844 024 844 × 10
-5
-8.342 197 663 × 10
-6
5.582 903 813 × 10
-4
c
3
= 1.306 861 9 × 10
-7
4.031 129 726 × 10
-9
4.279 433 549 × 10
-10
-1.952 394 635 × 10
-8
c
4
= -2.270 358 0 × 10
-10
-6.249 428 360 × 10
-13
-1.191 577 910 × 10
-14
2.560 740 231 × 10
-13
c
5
= 3.514 565 9 × 10
-13
6.468 412 046 × 10
-17
1.492 290 091 × 10
-19
c
6
= -3.895 390 0 × 10
-16
-4.458 750 426 × 10
-21
c
7
= 2.823 947 1 × 10
-19
1.994 710 149 × 10
-25
c
8
= -1.260 728 1 × 10
-22
-5.313 401 790 × 10
-30
c
9
= 3.135 361 1 × 10
-26
6.481 976 217 × 10
-35
c
10
= -3.318 776 9 × 10
-30
Error: 0.02°C to -0.02°C 0.005°C to -0.005°C 0.001°C to -0.0005°C 0.002°C to -0.001°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.
Table F-7
Type S inverse function polynomial
-50°C to 250°C
(-235µV to 1,874µV)
250°C to 1,200°C
(1,874µV to 11,950µV)
1,064°C to 1,664.5°C
(10,332µV to 17,536µV)
1,664.5°C to 1,768.1°C
(17,536µV to 18,693µV)
c
0
= 0.0 1.291 509 199 × 10
1
-8.087 801 117 × 10
1
5.333 875 126 × 10
4
c
1
= 1.849 494 60 × 10
-1
1.466 298 863 × 10
-1
1.621 573 104 × 10
-1
-1.235 892 298 × 10
1
c
2
= -8.005 050 62 × 10
-5
-1.534 713 402 × 10
-5
-8.536 869 453 × 10
-6
1.092 657 613 × 10
-3
c
3
= 1.022 374 30 × 10
-7
3.145 945 973 × 10
-9
4.719 686 976 × 10
-10
-4.265 693 686 × 10
-8
c
4
= -1.522 485 92 × 10
-10
-4.163 257 839 × 10
-13
-1.441 693 666 × 10
-14
6.247 205 420 × 10
-13
c
5
= 1.888 213 43 × 10
-13
3.187 963 771 × 10
-17
2.081 618 890 × 10
-19
c
6
= -1.590 859 41 × 10
-16
-1.291 637 500 × 10
-21
c
7
= 8.230 278 80 × 10
-20
2.183 475 087 × 10
-26
c
8
= -2.341 819 44 × 10
-23
-1.447 379 511 × 10
-31
c
9
= 2.797 862 60 × 10
-27
8.211 272 125 × 10
-36
Error: 0.02°C to -0.02°C 0.01°C to -0.01°C 0.0002°C to -0.0002°C 0.002°C to -0.002°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.
2750-900-01.book Page 5 Wednesday, August 3, 2011 7:56 AM

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A