Reference Test - Samson 3730-3 Operating Instructions Manual

Operation
the derivative-action time until the desired
behavior is reached. When the maximum
value of 4 is reached for the derivative-ac-
tion time, the proportional-action coefficient
can be reduced in steps.
NOTICE
!
Changing the proportional-action coefficient
influences the set point deviation.
Start-up
− Application type (Code 49 - h0)
[Control valve], Open/Close valve
− Initialization mode (Code 6):
[Maximum range (MAX)], Nominal range
(NOM) or Manual adjustment (MAN)
− Pin position (Code 4): [Off], 17, 25, 35, 50,
70, 100, 200, 300 mm, 90°
− Pressure limit (Code 16): [Off], 3.7, 2.4, 1.4 bar
Settings > Positioner > Performance characteris-
tics
− Required proportional-action coefficient Kp
(level) (Code 17): 0 to 17, [7]
− Required derivative-action time Tv (level) (Code
18): Off, 1 to 4, [2]
Setting cannot be made in Type 3730-4.
1)
In this case, the application type = Control
valve
Type 3730-4 and Types 3731-3/-5: without
2)
300 mm
2.4.1

Reference test

The monitoring of friction, supply pressure,
leakage (pneumatics and to the atmosphere),
zero point and actuator springs requires ad-
ditional reference tests for 'Drive signal dia-
gram steady-state' (test d1) and 'Drive signal
14
:
1)
2)
diagram hysteresis' (test d2). See section 5.2
and section 5.1.
NOTICE
!
− The valve moves through its working range
during the reference test.
− The reference test cannot be performed if
the positioner has been initialized in the
substitute calibration (SUB) mode.
Right-click 'Start reference test' in the Diag-
nosis folder and select 'Execute' to start the
recording of reference data. tESt and d1 or
d2 appear in alternating sequence on the
positioner display.
Note
− Right-click 'Stop reference test' and select
Execute to cancel the reference test.
− The positioner records the reference data
automatically after initialization if 'Initial-
ization with reference test' is set to 'Yes'.
− A new reference test causes the results of
existing reference tests to be overwritten
and the diagnostic data to be deleted.
− If the reference data could not be recorded
correctly or are incomplete, Code 48 - h1
is generated in the positioner. If the 'Initial-
ization with reference test' parameter is ac-
tivated, an incorrect reference test is also
indicated in Code 81.
− The positioner can still perform its control
task properly even if the reference test was
not recorded correctly or is incomplete.
− Data from the first reference test are used
as the reference if no reference data are
saved in the positioner on starting the tests
EB 8389 EN