1
Description
The
Type 3730-3 Positioner in ESD version
is based on the Type 3730-3 Positioner with
HART
®
Communication.
These mounting and operating instructions,
EB 8388-1 EN, supplement EB 8384-3 EN
and focus on the ESD functions.
Technical data, attachment, electrical and
pneumatic connections as well as operation
and the standard EXPERT valve diagnostics
are dealt with in Mounting and Operating
Instructions
EB 8384-3 EN
.
Note!
The optional external position sensor cannot
be used with the Type 3730-3 Positioner in
ESD version.
Extended EXPERT
+
valve diagnostics are de-
scribed in
EB 8388 EN
. By default, all
positioners in ESD version include the
EXPERT
+
valve diagnostic functions.
Note!
Positioners delivered not mounted on an ac-
tuator are configured with the default set-
tings, which means that the ESD functions
are not activated.
After mounting the positioner on a safety
shut-off valve and starting it up, switch the
positioner to
ESD mode
to allow it to per-
form the safety functions (for required set-
tings and instructions, see section 2 and
EB 8384-3 EN
).
1.1
General
Note!
When the
ESD function is active
, the
positioner keeps the attached valve to a set
position, e.g. open. The valve does not per-
form any control tasks anymore.
In AUTO operating mode, the positioner
can be used to control the attached valve.
ESD (Emergency ShutDown) is a positioner
function with extended firmware and partial
stroke testing for the predictive, status-ori-
ented detection of malfunctions in pneumatic
shut-off valves in safety instrumented systems
(SIS).
As a result, the probability of failure on de-
mand (PFD) can be reduced and mainte-
nance intervals can be extended.
All testing and diagnostic functions are com-
pletely integrated into the positioner. The
measured data and test results are collected
and stored in the positioner.
Partial stroke tests can be started and can-
celled either manually at any time (on site or
using an engineering tool) or automatically
according to a certain schedule.
A test status is determined at the end of a
partial stroke test, which allows operators to
directly see whether the test has been com-
pleted successfully or not. When the test has
not been completed successfully, possible
causes of the fault are given. Apart from be-
ing indicated on the positioner’s display or
in the engineering tool used, the test status is
also issued at the fault alarm output.
EB 8388-1 EN
3
Description
Summary of Contents for 3730-3 ESD
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