YOKOGAWA MC43, Руководство пользователя

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<4. Operation>
4-1
IM 02M04B01-01EN
4. Operation
Controller is available either with or without
Automatic-Manual Transfer System. The following
covers the operation of controller having that
system.
4.1 Automatic-Manual Transfer
System
The automatic-manual transfer system consists
of a regulator, a sensitive balance indicator, and
a transfer switch. The system permits switching
between manual and automatic control without
upsetting the process.
The illustration below shows the components that
are concerned with the transfer system.
Set point index
Measurement pointer
Output gauge
Auto-man switch
Balance indicator
Regulator
Set point knob
F0401.ai
1
2
3
1. To Transfer from Manual to Automatic Control
Slowly turn set point knob (or adjust remote set
point, if present) to move balance indicator ball
to within central portion of tube (not up against
either end). Then turn switch to automatic (A).
2. To Transfer from Automatic to Manual Control
Turn regulator slowly to move balance indicator
ball to within central portion of tube (not up
against either end). Turn regulator so that top
of knob moves in direction that ball is to move.
Then turn switch to manual (M). Valve can now
be controlled with regulator.
3. Shutoff for air to automatic control section
(controller can still be operated manually).
4.2 Putting into Operation
1. Make sure that measuring system is properly
installed and operating.
2. Set control dial so that index points to desired
control action (output either increases or
decreases with increasing measurement).
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Control dial
Stop
Latch
Index
With latch in lowered position (as shown),
control dial cannot be accidentally rotated to
area of reverse control action.
F0403.ai
Stop
Latch
To reverse control action, push up latch and
rotate dial so that latch is on other side of stop,
then push down latch.
* Control dial is set to “Increase” action for pressure
measurement and to “Decrease” action for
temperature measurement.