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Figure 33: System Noise on the DT9871U and DT9874 Using the Moving Average Filter
System Temperature Error for the DT9871
Table 10
lists the accuracy of the DT9871 for each thermocouple type at several temperature
points over the dynamic range of the instrument.
Table 10: Calculated Thermocouple Accuracy of the DT9871
Input
Temperature
J
–100° C
±0.33° C
±0.3° C
0° C
±0.31° C
100° C
±0.29° C
300° C
±0.28° C
500° C
±0.27° C
700° C
±0.27° C
900° C
±0.28° C
1100° C
1400° C
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a. Conditions for accuracy measurements:
Warm-up time of 45 minutes. Inclusive of typical 0.2
Inclusive of typical 5 μV offset error (maximum offset error is 50 μV). Exclusive of thermocouple errors.
Exclusive of noise (see
Figure 34
Thermocouple Type
K
T
E
±0.37° C
±0.38° C
±0.31° C
±0.33° C
±0.33° C
±0.28° C
±0.29° C
±0.31° C
±0.27° C
±0.34° C
±0.29° C
±0.26° C
±0.31° C
±0.26° C
-----------
±0.3° C
±0.27° C
-----------
±0.34° C
±0.28° C
-----------
±0.34° C
-----------
-----------
-----------
-----------
-----------
°
C CJC error (maximum CJC error is 0.3
and
Figure 35
for more information about system noise).
a
S
R
B
-----------
-----------
-----------
±1.12° C
±1.14° C
-----------
±0.88° C
±0.86° C
-----------
±0.75° C
±0.71° C
±1.84° C
±0.71° C
±0.66° C
±1.2° C
±0.68° C
±0.63° C
±0.92° C
±0.66° C
±0.6° C
±0.8° C
±0.64° C
±0.58° C
±0.71° C
±0.62° C
±0.56° C
±0.64° C
°
C).
Specifications
N
±0.44° C
±0.39° C
±0.35° C
±0.33° C
±0.33° C
±0.33° C
±0.33° C
±0.34° C
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109
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