Baker Hughes Masoneilan SVI II AP Series, Quick Start Manual

Page: 51 / 124

Masoneilan SVI II AP Digital Positioner Quick Start Guide = | 51
© 2020 Baker Hughes Company. All rights reserved
.
SVI II AP can communicate with a remote PC running ValVue
software via a modem connected to the PC's serial or USB
port. The PC, which is not intrinsically safe, must be connected
to the circuit on the safe area side of the intrinsic safety barrier
if the valve is located in a hazardous area.
The SVI II AP can be operated, calibrated, configured, and
interrogated either by using local pushbutton and display, or by
using a PC running ValVue software, HART
®
Handheld
Communicator, or any registered HART
®
Host that supports
DDs. The HART
®
Handheld Communicator is approved for
Intrinsically Safe use in accordance with FM and ATEX
standards. Read and observe all handheld labeling. The SVI II
AP is polarity sensitive so the positive lead must be connected
to the positive (+) terminal and the negative lead to the
negative (-) terminal. Reversing the input will not cause
damage but the unit will not function.
Grounding Practices
There must never be more than one ground point for the shield
wiring. Normally ground is connected at the controller or at the
intrinsic safety barrier.
The case grounding screws are located on the outside of the
case at the lower right of the display cover and inside the cover.
The case is isolated from all circuitry and can be grounded
locally in accordance with applicable codes.
If noise or instability is present, set the positioner to MANUAL
mode of operation and manually position the valve over its
entire range. If the valve is stable in MANUAL mode then the
problem can be noise in the control system. Recheck all wiring
connections and ground points.