Azbil KFDB, Руководство пользователя

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Chapter 6. ADJUSTMENT OF INDICATING SECTION
Adjustment of the indicating section should be made after that for the deviation generating
mechanism and controller mechanism is complete. The structure of the PV indicating
mechanism and that of the SP indicating mechanism for the cascade mode of operation are
identical. To adjust the PV indicator section, apply an input signal to the detector section (see
Chapter 4). To adjust the SP indicator section, apply a pneumatic pressure (20 to 100 kPa (0.2
to 1.0 kgf/cm
2
}) to the ESP connection port of the instrument.
Fig. 6-1.
(1) Zero Adjustment
Apply 0 % input and adjust the ZERO ADJ knob of the travel link so that the PV pointer
indicates 0.
Indication is reduced as you turn knob clockwise as viewed from the instrument bottom.
(2) Span Adjustment
Apply 80 % input and adjust the SPAN ADJ screw so that the PV pointer indicates 80 %.
The span increases as your turn the screw clockwise. When a large span change is
necessary, change the connection point between the travel link and the hole of the span
adjustment screw section. The span increases as the distance from the center of the
mechanism increases.