Product Specifications
4
Agilent U2802A 31-Channel Thermocouple Input User’s Guide
43
System Accuracy Specifications
The Agilent U2802A thermocouple input measurement accuracy with the
U2355A and U2356A is as shown in
Table 4- 1
,
Table 4- 2
, and
Table 4- 3
.
Table 4-1
U2802A measurement accuracy with U2355A or U2356A, at 23
°
C ± 5
°
C, with
different number of averaging points.
N O T E
•
Assume a ±1 °C error in the CJ measurement due to sensor error and temperature
gradient error in the accuracy numbers in Table 4-1, Table 4-2, and Table 4-3 below.
•
Table 4-1, Table 4-2, and Table 4-3 are derived from the U2802A and DAQ input accuracy
specifications without including the thermocouple error. Refer to
“Calculating System
Accuracy”
on page 46 for calculation methodology.
Thermocouple Measurements Accuracy
(U2355A, U2356A @ 23 °C ± 5°C)
T/C
Type
ITS-90
Temperature
Range (°C)
Optimum
Measurement
Range(°C)
Without
averaging
(± °C)
50 points
averaging
(± °C)
500 points
averaging
(± °C)
Low
High
Low
High
B
0
1820
1100
1820
1.9
1.2
1.0
400
1100
4.4
2.5
2.0
E
–270
1000
–150
1000
1.7
1.6
1.6
–200
–150
2.4
2.3
2.3
J
–210
1200
–150
1200
1.6
1.5
1.5
–210
–150
2.7
2.6
2.5
K
–270
1372
–100
1200
1.5
1.4
1.4
–200
–100
2.7
2.6
2.6
N
–270
1300
–100
1300
1.5
1.3
1.3
–200
–100
3.0
2.7
2.6
R
–50
1768
300
1760
2.0
1.4
1.3
–50
300
5.0
3.1
2.6
S
–50
1768
400
1760
2.1
1.6
1.4
–50
400
4.5
2.8
2.4
T
–270
400
–100
400
1.5
1.4
1.4
–200
–100
2.7
2.5
2.5
U2802A_UG.book Page 43 Friday, November 25, 2011 10:57 AM
