Fluke 2680A Service Manual page 35

Table 1-19. PAI A/D Thermocouple Specifications (cont.)
Thermocouple
ITS90
Type Temperature C
N -100 to –25
-25 to 120
120 to 1000
1000 to 1300
R 250 to 600
600 to 1500
1500 to 1767
S 250 to 1000
1000 to 1400
1400 to 1767
T -100 to 0
0 to 150
150 to 400
U -100 to 0
0 to 600
Thermistor
Temp C Range*
-40 to 150 100 to 100 m
Steinhart – Hart Equation: 1/(T
Default constants are supplied only for a YSI (type 004) 2,252
constants for other thermistors. The ranges of thermistor constants are as follows: A 1.0E-4 to
1.0E-2, B 1.0E-5 to 1.0E-3, and C 1.0E-8 to 1.0E-6.
*Assumes 4-wire measurement for thermistor resistance values below 2 k
2.252 k thermistor).
Resolution 18 C to 28 C
C 90 Day
Slow
.05 0.65
.05 0.55
.04 0.45
.03 0.55
0.1 0.90
0.1 0.80
0.1 0.85
0.1 0.95
0.1 0.80
0.1 1.00
.04 0.60
.03 0.40
.02 0.30
.04 1.50
.04 0.60
90 Day
Slow
0.3
o
Kelvin) = A + B*(ln ) + C*(ln
Introduction and Specifications
Precision Analog Input (PAI) A/D Specifications
Accuracy + C
-10 C to 60 C
1 Year
Slow Fast Slow
0.75 1.20 0.80
0.60 1.00 0.70
0.60 0.90 1.00
0.75 1.00 1.20
1.00 2.10 1.20
0.90 1.80 1.30
0.85 1.90 1.70
1.10 2.30 1.30
1.00 1.90 1.40
1.30 2.20 1.80
0.65 1.00 0.70
0.50 0.80 0.60
0.40 0.60 0.60
1.50 2.60 1.60
0.80 1.60 1.10
Accuracy + C
1 Year
Slow
0.4
3
)
thermistor, you can enter
(above 28 C for a
1 Year
Fast
1.30
1.10
1.20
1.50
2.20
2.00
2.50
2.40
2.30
2.80
1.10
0.90
0.80
3.00
1.90
18 to 23 C
1
1-19