YOKOGAWA MC43, Руководство пользователя

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<4. Operation>
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IM 02M04B01-01EN
(2) Proportional Plus Derivative Controller
(Model MC43-A3)
1. With DERIVATIVE at 0.05, adjust
PROPORTIONAL BAND as described in
Proportional Controller.
2. Adjust DERIVATIVE using same procedure
as Proportional Band, except doubling each
setting instead of halving it.
(3) Proportional Plus Reset Controller (Model
MC43-A4)
1. With RESET at 50 or at safe high value, adjust
PROPORTIONAL BAND as described in
Proportional Controller.
2. Adjust RESET using same procedure as
Proportional Band.
(4) Proportional Plus Reset Plug Derivative
Controller (Model MC43-A5)
1. With RESET at 50 or at safe high value, and
DERIVATIVE to 0.05, adjust PROPORTIONAL
BAND as described in Proportional Controller.
2. Adjust DERIVATIVE using same procedure
as Proportional Band, except doubling each
setting instead of halving it.
3. Adjust RESET to final setting of Derivative in
Step 2.
(5) On-Off Controller (Model MC43-A1)
As the measurement crosses the control point
(determined by the setting index), the control valve
fully opens (or closes), and as the measurement
reverses and recrosses the control point, the control
valve fully closes (or opens).
1. Rotate control dial so that arrow points to small
rectangle of desired control action.
2. If setting index and measurement pointer do not
coincide, adjust set point index.
(6) Differential Gap Action Controller (Model
MC43-A7)
As the measurement goes below the lower control
point, the control valve fully opens (or closes). This
reverses the measurement but there is no change
in control action until the measurement crosses the
upper control point, at which time the valve fully
closes (or opens). One control point is determined
by the setting index and the other control point, by
the gap width (see example below).
Gap width = difference between control points
divided by span.
For example, if measurement scale is graduated
from 20 to 120, and control points are to be 70 and
90,
gap width =
90 - 70
= 20%
120 - 20
Typical Differential Gap Action Control Record
Time
Measurement
Upper control point
Lower control point
F0409.ai
1. If “Increasing measurement, INCREASING
output” section of control dial is used, turn
set point knob (or adjust remote set point, if
present) to bring index to LOWER control point.
If “Increasing measurement, DECREASING
output” is used, bring index to UPPER control
point.