Time Constant of First Order Measuring System There are three methods to calculate time constant 1. Determine the time needed to respond to 63.2% of the input value. 2. Plot (by excel) the graph oft vs T and find the time constant at time=10 minutes. OBSERVATIONS: Time(sec) Temperature(°C) 98.5 8 98.4 73.8 15 16 3.4 17 3.3 18 1.6 20 1.5 22 1.4 1.3 23 25 1.2 28 1.1 33 1.0 37 0.9

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Time Constant of First Order Measuring System
There are three methods to calculate time constant
1. Determine the time needed to respond to 63.2% of the input value.
2. Plot (by excel) the graph of t vs T and find the time constant at time=10
minutes.
OBSERVATIONS:
Time(sec) Temperature(°C)
98.5
98.4
15
73.8
16
3.4
17
3.3
18
1.6
20
1.5
22
1.4
23
1.3
25
1.2
28
1.1
33
1.0
37
0.9
O 00
Transcribed Image Text:Time Constant of First Order Measuring System There are three methods to calculate time constant 1. Determine the time needed to respond to 63.2% of the input value. 2. Plot (by excel) the graph of t vs T and find the time constant at time=10 minutes. OBSERVATIONS: Time(sec) Temperature(°C) 98.5 98.4 15 73.8 16 3.4 17 3.3 18 1.6 20 1.5 22 1.4 23 1.3 25 1.2 28 1.1 33 1.0 37 0.9 O 00
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