
15
4.5 Command Illustrations
The figures below illustrate the commands that affect the pressure output rate. Figure 5 shows a varying pressure
signal having a reading integration time of 200 msec. If the small variations on the pressure signal are considered
noise and are undesirable, increase the integration time to time-average the pressure signal, and filter out the noise.
Figure 5. Integration (I=) Command, Example 1
Figure 6 shows the same pressure signal with a 1 second integration time reducing the noise variations on the output
readings. Of course, the penalty for doing this is reducing the response time to rapidly changing pressures that are
not considered noise.
Figure 6. Integration (I=) Command, Example 2
Pressure
(psi)
5.00
5.04
5.08
4.96
5.12
5.16
5.20
5.24
4.92
Time (sec)
1.0
2.0
3.0
Integration Time
(0.2 sec)
I = M2
IC = 0
RR = 0 OP=A
Integration time
HPB pressure output
Actual pressure
Integration Time = 0.2 sec
(I=M2 sets 2x100 msec/sample)
Pressure
(psi)
5.00
5.04
5.08
4.96
5.12
5.16
5.20
5.24
4.92
Time (sec)
1.0
2.0
3.0
Integration Time
(1 sec)
Integration Time = 1 sec
(I=R1 sets 1 reading/sec)
I=R1
IC = 0
RR = 0 OP=A
Integration time
HPB pressure output
Actual pressure