Instruction Manual

Viewing Device Variables and Diagnostics
September 2013
6-5
PRESS TO PERFORM
THE CONFIGURED
PARTIAL STROKE
TEST
Figure 6-1. Local Control Panel
Device (Digital Valve Controller)
The Auto Partial Stroke Test allows the partial stroke
test to be scheduled by the DVC6000 SIS. The test is
scheduled in number of hours between tests. Any
power cycle will reset the test interval timer.
Auxiliary Terminal
The auxiliary terminal can be used for different
applications. The default configuration is for a partial
stroke test initiated by shorting the contacts wired to
the auxiliary +/− terminals of the DVC6000 SIS. Refer
to Auxiliary Terminal Wiring Length Guidelines below.
 Local Push Button
A partial stroke test command may be sent to the
DVC6000 SIS digital valve controller using a set of
contacts wired to the auxiliary +/− terminals. To
perform a test, the contacts must be closed for 3 to 5
seconds and then opened. To abort the test, close the
contacts for 1 second. The last set of diagnostic data
is stored in the instrument memory for later retrieval
via ValveLink software.
 Local Control Panel
The LCP100 local control panel is wired directly to the
DVC6000 SIS digital valve controller.
The black “Valve Test” push button (see figure 6-1)
allows the valve to perform the configured partial
stroke test.
 Press and hold for 3 to 10 seconds
The test can be overridden by the “Valve Close”
button, “Valve Open” button, or if an emergency
demand occurs.
 Local DI
When configured by the user interface, the Auxiliary
Terminal can be used as a discrete input from a
pressure switch, temperature switch, etc., to provide
an alert.
Auxiliary Terminal Wiring Length Guidelines
The Auxiliary Input Terminals of a DVC6000 SIS can
be used with a locally-mounted switch for initiating a
partial stroke test. Some applications require that the
partial stroke test be initiated from a remote location.
The length for wiring connected to the Auxiliary Input
Terminals is limited by capacitance. For proper
operation of the Auxiliary Input Terminals capacitance
should not exceed 18000 pF. As with all control signal
wiring, good wiring practices should be observed to
minimize adverse effect of electrical noise on the Aux
Switch function.
Example Calculation: Capacitance per foot or per
meter is required to calculate the length of wire that
may be connected to the Aux switch input. The wire
should not exceed the capacitance limit of 18000 pF.
Typically the wire manufacturer supplies a data sheet
which provides all of the electrical properties of the
wire. The pertinent parameter is the highest possible
capacitance. If shielded wire is used, the appropriate
number is the “Conductor to Other Conductor &
Shield” value.
Example — 18AWG Unshielded Audio, Control
and Instrumentation Cable
Manufacturer’s specifications include:
Nom. Capacitance Conductor to Conductor @ 1 KHz: 26 pF/ft
Nom. Conductor DC Resistance @ 20 Deg. C: 5.96 Ohms/1000 ft
Max. Operating Voltage − UL 200 V RMS (PLTC, CMG),150 V RMS
(ITC)
Allowable Length with this cable = 18000pF /(26pF/ft) = 692 ft
6