Instruction Manual

DVC6000 SIS
September 2013
Glossary-4
Leak Class
Defines the allowable leakage by a valve when it
is closed. Leak class numbers are listed in two
standards: ANSI/FCI 70-2 and IEC 534-4.
Linear
A valve flow characteristic where changes in flow
rate are directly proportional to changes in valve
stem travel. One of the input characteristics
available for a FIELDVUE digital valve controller.
See also, Equal Percentage and Quick Opening.
Linearity, dynamic
Linearity (independent) is the maximum deviation
from a straight line best fit to the opening and
closing curves and a line representing the
average value of those curves.
Local Control Panel
The LCP100 local control panel is used with the
FIELDVUE DVC6000 SIS digital valve controller.
This panel is used to monitor and manually open
and close a safety shutdown valve. The LCP100
also provides a manual reset feature and a button
for initiating a partial stroke test.
Manual Reset
The DVC6000 SIS digital valve controller can be
configured to hold the trip state until a local reset
button is pressed.
Memory
A type of semiconductor used for storing
programs or data. FIELDVUE instruments use
three types of memory: Random Access Memory
(RAM), Read Only Memory (ROM), and
Non-Volatile Memory (NVM). See also these
listings in this glossary.
Menu
A list of programs, commands, or other activities
that you select by using the arrow keys to
highlight the item then pressing ENTER, or by
entering the numeric value of the menu item.
Minimum Closing Time
Minimum time, in seconds, for the travel to
decrease through the entire ranged travel. This
rate is applied to any travel decrease. Valid
entries are 0 to 400 seconds. Deactivate by
entering a value of 0 seconds.
Minimum Opening Time
Minimum time, in seconds, for the travel to
increase through the entire ranged travel. This
rate is applied to any travel increase. Because of
friction, actual valve travel may not respond in
exactly the same time frame. Valid entries are 0
to 400 seconds. Deactivate by entering a value of
0 seconds.
Non-Volatile Memory (NVM)
A type of semiconductor memory that retains its
contents even though power is disconnected.
NVM contents can be changed during
configuration unlike ROM which can be changed
only at time of instrument manufacture. NVM
stores configuration restart data.
Parallel
Simultaneous: said of data transmission on two or
more channels at the same time.
Polling Address
Address of the instrument. If the digital valve
controller is used in a point-to-point configuration,
set the polling address to 0. If it is used in a
multidrop configuration, or split range application,
set the polling address to a value from 0 to 15.
Pressure Sensor
A FIELDVUE instrument internal device that
senses pneumatic pressure. DVC6000 SIS digital
valve controllers have three pressure sensors:
one to sense supply pressure and two to sense
the output pressures.
Primary Master
Masters are communicating devices. A primary
master is a communicating device permanently
wired to a field instrument. Typically, a
HART-compatible control system or a computer
running AMS ValveLink Software is the primary
master.
In contrast, a secondary master is not often
permanently wired to a field instrument. The
Model 375 Field Communicator or a computer
running ValveLink software communicating
through a HART modem could be considered a
secondary master.
Note: If one type of master takes an instrument
Out Of Service, the same type must put it In
Service. For example, if a device set up as a
primary master takes an instrument Out Of
Service, a device set up as a primary master
must be used to place the instrument In Service.
Glossary