Azbil KFDB, Руководство пользователя

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(f) Set the integral dial (reset dial) scale at 2 minutes.
(g) Count the time the controller output takes to change from 53.3 kPa {400 mmHg} to
60 kPa {450 mmHg}.
(h) Check that the counted time is within 120±60 seconds.
(i) As required, shift the position of the dial of the integral unit and fix it in the new
position.
(2) Derivative Unit
(a) Set the setpoint (SP) at 50 %FS
(b) Set the proportional band dial at 100 (%PB) in the direct action mode. Make the
derivative restriction mechanism full open (less than 0.05 minutes). If the integral
mechanism also is incorporated, make it also full open (less than 0.05 minutes).
(c) Balance the controller output pressure at 40 kPa {300 mmHg} by adjusting the PV
input.
(d) Change the integral (reset) and derivative (rate) dials to the fully closed state (30
minutes or more).
(e) Balance the controller output pressure at 80 kPa {600 mmHg} by adjusting the PV
input. (Denote this value by n
1
.)
(f) Make the integral dial full open (less than 0.05 minutes) and measure the residual
pressure. Denote this value by n
2
.) Calculate the derivative amplitude as follows:
(g) Repeat the procedure of (b) through (e) and set the controller output pressure at 80
kPa {600 mmHg}.
(h) Rapidly change the derivative dial to the point of 2 minutes and count the time the
output pressure takes to change to 63.2 % of the value of (n
1
− n
2
).
(i) Check that t × W is within 120±60 seconds.
(j) As required, shift the position of the index of the derivative unit and fix it in the new
position.
Fig. 5-2. Calibration of Derivative Action