Azbil KFDB, User Manual

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(6) Set the differential gap (DIFF GAP) dial to the clockwise or counterclockwise 100 %
position. Adjust the feedback link adjustment pin so that the output increases at the
setpoint position. (To lower the output once, open slightly the flapper with the tip of
a screwdriver.)
(7) Repeat the procedure of (4), (5) and (6) so that the output rise position is within
setpoint (SP) ±1.5 %FS at any point within the total range of the differential gap
(DIFF GAP) dial.
(C) Setting of Batch Switch (See the Notes of Section 3-4.)
When the batch switch is incorporated, set the batch operation point as follows:
(a) Connect the instrument output (OUT) connection port a pressure gauge of Class 0.5
better.
(b) Set the proportional band setting dial of the controller mechanism to the INC.
MEAS. DEC. OUT state and at 50 %.
(c) Set the dial of the integral unit at 0.02 minutes (at the minimum position).
(d) Apply a deviation of 10 to 15 %FS to the controller mechanism to increase the
controller output until it saturates.
(e) Turn the batch switch setting screw until the desired batch setting output is
obtained. For this setting, loosen the lock nut once and turn the setting screw with a
screwdriver. After the setting is over, tighten the lock nut.
(f) When no batch control function is needed, turn the setting screw to the full
counterclockwise position.
Fig. 5-5. Batch Switch Unit