3 Tests MAN
These tests are performed when the process
in not running (i.e. manual operation). The
positioner does not follow its reference vari
-
able.
In all the following tests, the control valve
moves through the full range of the valve af
-
ter the test is started. Therefore, before start
-
ing the test, it is absolutely important to
make sure whether the process and plant
conditions allow it.
In contrast to the tests in statistical informa
-
tion AUTO, the corresponding test MAN
covers the full range of the valve and also
serves to detect errors within the travel
range.
The tests MAN provide a trend showing the
current control valve state, any possible ex-
isting malfunctions and help to pinpoint
faults and to schedule predictive mainte-
nance work. For reasons of safety, the tests
MAN can only be started when the
positioner is in manual operating mode.
Select the operating mode over Code 0 on
the positioner or in
Positioner
folder (>
Op
-
erating mode
).
Select the
Start all tests parameter
to start all
tests automatically in sequence.
During the test, the following parameters are
changed for all tests MAN (d1 to d4):
4
Lower x-range value (Code 8): 0 %
4
Upper x-range value (Code 9): 100 %
4
Lower/upper x-limit (Code 10/11): OFF
(not in a step response test)
4
Setpoint cutoff w decrease/increase
(Code 14/15): OFF
4
Pressure limit (Code 16): Active pressure
limit is raised one stage higher
4
Characteristic (Code 20): Linear
4
W-ramp OPEN/CLOSED (Code 21/22):
Variable
Note!
The tests MAN can only be activated in
manual operating mode.
EB 8388 EN 21
Tests MAN
Fig. 10 · Tests MAN
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