Azbil KFDB, Руководство пользователя

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(B) Differential Gap Controller
Before starting adjustment, check zero deviation as follows:
(a) Set the setpoint at 50 %.
(b) Remove the travel link (PV) on the indicating mechanism side and insert the
adjustment pin.
(c) Check that the PV pointer and the SP pointer are accurately aligned together without
any shift. If there is any shift, align them accurately by means of the SP pointer
adjustment pin.
(d) Remove the adjustment pin and connect the travel link (PV).
Fig. 5-4. Differential Gap Controller Unit
Adjustment
(1) Make initial setting of the flapper adjustment pin and the feedback link adjustment pin as
follows:
(a) The flapper pin can be rotate 360 degrees of angle. Turning the pin clockwise, set the
pin groove horizontally at the side that the flapper rises.
(b) The feedback pin also can be rotated 360 degrees of angle. Turning the pin clockwise,
set the pin groove horizontally at the side that the link falls.
(2) Set the setpoint at 50 %. Set the differential gap setting dial at the minimum (0 %) position
of the INC. MEAS. INC. OUT side. Check the output pressure rise and fall points by
moving the PV pointer, and determine the difference between the two points.
(3) Set the dial at the minimum position of the INC. INC. MEAS. DEC. OUT side. Check the
output pressure rise and fall points by moving the PV pointer.
(4) Adjust the deviation link so that the output rise points of (2) and (3) are distributed with
the setpoint as the center of distribution. If the distribution point is shifted in the positive
direction, lengthen the link (turn the screw downward). If it is shifted in the negative
direction, shorten the link (turn the screw upward).
(5) Adjust the flapper adjustment pin so that the output rise points of (2) and (3) conform
with the setpoint. Repeat the procedure of (4) and (5) until the operation points conform
with the setpoint.