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Product Specifications 4
Agilent U2802A 31-Channel Thermocouple Input User’s Guide 51
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.
Tabl e 4-1 U2802A measurement accuracy with U2355A or U2356A, at 23 °C ± 5 °C, with
different number of averaging points.
NOTE
• 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 54 for calculation methodology.
Thermocouple Measurements Accuracy
(U2355A, U2356A @ 23 °C ± 5°C)
T/C
Ty pe
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 51 Tuesday, January 8, 2008 10:24 AM
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