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Operation
-
Operating
Modes
130
DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual
Release M
April 2017
An alternate action switch places the recorder in automatic or manual mode of operation.
Switching between manual and automatic will be bumpless, except when the PD+MR algorithm is
selected.
Table 5-12 includes procedures for selecting automatic or manual mode and changing the output while
in manual.
Table 5-12 Procedure for selecting automatic or manual mode
Step
Operation
Press
Action/Result
1
Selecting automatic
mode
MAN
AUTO
Until “A” indicator is ON.
The recorder regulates its output to maintain the PV at
the desired setpoint.
Upper Display:
shows the PV value
Lower Display:
shows
SP
and the setpoint value
The deviation bargraph indicates the PV deviation from
the setpoint.
2
Selecting manual mode
MAN
AUTO
Unti
l “MAN” indicator is ON.
The recorder holds its output at the last value used
during automatic operation and stops adjusting the
output for changes in setpoint or process variable.
Upper Display:
shows the PV value
Lower Display:
shows
OUT
and the output value
in %
The deviation bargraph indicates the PV deviation from
the setpoint.
3
Adjust the output in
manual mode
▲
or
▼
Adjust the output value while in manual mode.
Upper Display:
shows the PV value
Lower Display:
shows
OUT
and the output value
in %
4
Return to automatic
mode
MAN
AUTO
“A” indicator appears indicating automatic mode.