Page 12.2
Measurement accuracy: Pm
The measurement accuracy Pm depends on the voltage range of the appliance (see the
previous paragraph) and on the slope of the thermocouple. You shall take the slope at 0°C
while knowing that it will vary as a function of the temperature, but this variation is
generally of the second order for the accuracy calculation.
Voltage of thermocouple (mV)
Slope of the thermocouples (µV)
Example :
At 100 °C the slope of thermocouple J is 55µV
At -100 °C slope is
30µV .
So the error is 2 time greater then 100°C to -100°C.
-10
0
10
20
30
40
50
60
70
80
-200
0
200
400
600
800
1000 1200 1400 1600 1800 2000
K
J
T
S
B
E
N
0
10
20
30
40
50
60
70
80
90
-200
0
200
400
600
800 1000 1200 1400 1600 1800 2000
K
J
T
S
B
E
N
Summary of Contents for DAS220
Page 7: ......
