Samson 373 Series Operating Instructions

12 EB 8389 EN
Operation
2.3 Differences between rm-
ware versions
These Mounting and Operating Instructions
are valid for Types3730-2/-3/-4/-5 and
Types3731-3/-5 Positioners in the following
rmware versions:
Positioner Firmware 1.5x Firmware 1.6x
Type3730-2 • •
Type3730-3 • •
Type3730-4 •
Type3730-5 • •
Type3731-3 • •
Type3731-5 •
Type3730-3
− No differences
Type3730-5
− The status classication "Out of specica-
tion" (
) is not available in rmware
versions lower than rmware version
1.6x.
− The data logger (statistical information)
is no longer available in rmware ver-
sion 1.6x.
− The status classication in rmware 1.5x
is assigned in folder [Settings >
Positioner > Error control >
Classication report > Extended], in
rmware version 1.6x and higher in
folder [Settings > Positioner > Diagnosis
conguration > Classication]
2.4 Start-up
The positioner must be initialized to use the
full scope of the valve diagnostics. During
initialization the positioner adapts itself opti-
mally to the friction conditions and the signal
pressure required by the control valve.
The positioner can be initialized using one of
the following initialization modes: maximum
range (MAX), nominal range (NOM) and
manual adjustment (MAN).
− Maximum range (MAX)
Initialization mode for simple start-up of
valves with two clearly dened mechani-
cal end positions, e.g. three-way valves
− Nominal range (NOM)
Initialization mode for all globe valves
− Manually selected range (MAN)
Initialization mode for globe valves re-
quiring OPEN position to be entered
manually
The application type, pressure limit and the
start-up parameters required for the selected
initialization must be entered to initialize the
positioner.
Positioner start-up is described in detail in
the associated instructions (see Table1).
During positioner initialization, the propor-
tional-action coefcient Kp and deriva-
tive-action time Tv levels are optimally set. If
the positioner tends to overshoot impermissi-
bly due to other disturbances, the propor-
tional-action coefcient and derivative-action
time can be adapted accordingly. Increment
Note

Samson 373 Series Specifications

General

Brand	Samson
Model	373 Series
Category	Valve Positioners
Language	English