Samson TROVIS 3730-3, Operating Instructions Manual

Page: 55 / 132

EB 8389 EN 55
Statistical information
1.
Settings > Positioner > Error control >
Classification report > Extended > ...
Friction
−
Much higher over whole range
1)
:
[ ], , , ( ), ( )
− Much lower over whole range
1):
[ ], ,
, ( ), ( )
− Much higher over section 1) :
[ ], , , ( ), ( )
− Much lower over section 1) :
[ ], , , ( ), ( )
Type 3730-5 (1.6x) and Type 3731-5:
1.
Settings > Positioner > Diagnosis
configuration > Classification
−
Friction: [ ], , , ,
2.
Diagnosis > Statistical information > Drive
signal diagram > Hysteresis
− Tolerance band of hysteresis: 1 to 5 %, [5 %]
3.
−
Enable time distance
2)
:
[User-defined], Immediately
− Min. time distance from test: 1 to 24 h, [1 h]
4. − Start test
1)
Not Types 3730-4/-5 (1.5x)
2)
Not Type 3730-5 (1.5x) and
Series 3730-x (1.6x)
Cancel the test by right-clicking 'Stop test'
and selecting 'Execute' or by pressing the ro
-
tary pushbutton at the positioner.
4.7.1 Analysis and monitoring
The test is monitored by the 'Tolerance band
of hysteresis' parameter:
− If the valve position x leaves the 'Toler-
ance band of hysteresis' during the test,
the test is immediately canceled and the
positioner returns to closed-loop opera-
tion.
−
If a change in set point (∆w) occurs
which is greater than the 'Tolerance band
of hysteresis', the test is immediately can-
celed and the test is started again after
waiting 30 seconds using the new oper-
ating point.
If this test is also canceled by a
change
in set point (∆w) , it is reactivated after
waiting 60 seconds using the new oper-
ating point.
The test is started again ten times at the
maximum. The time between tests is in-
creased by 30 seconds each time (30 s x
Number of tests repeated). The time be-
tween tests is increased by 30 seconds
each time (30 s x Number of tests re -
peated). After the test is canceled for the
tenth time, the time entered in 'Min. time
distance from test' is kept again.
If the analysis of the hysteresis pinpoints
'Friction' or 'External leakage', the positioner
generates a corresponding status message.
Diagnosis > Status messages > Extended
−
Friction
1)
1)
Not Types 3730-4/-5 (1.5x)
Note