Masoneilan SVI II AP Installation and Maintenance ... - GE Energy

GE Oil and Gas
SVI II AP Instruction Manual
Verify Wiring and Connections
NOTE
For split range installations there are additional constraints on
the split range system: the minimum span must be 5 mA; the
upper range value must be 8 mA to 20 mA; the lower range
values must be 4 mA to 14 mA.
Use the following procedure to ensure that the SVI II AP is properly powered:
1. Connect a DC voltmeter across the input terminals.
2. For an input current between 4 and 20 mA, the voltage varies between 11 V and 9 V
respectively.
3. Current is read from the local display or with a milliampmeter installed in series with
the SVI II AP.
4. When voltage exceeds 11 V check that the polarity is correct.
5. If voltage is less than 9 V and polarity is correct, voltage compliance of current source
is inadequate.
6. Connect a milliampmeter in series with the current signal. Verify that the source can
supply 20 mA to SVI II AP input.
7. If 20 mA is not attainable, see troubleshooting.
NOTE
Improperly or inadequately grounded installations can cause
noise or instability in the control loop. The internal electronic
components are isolated from ground. Grounding the case is
unnecessary for functional purposes but grounding the case
may be necessary to conform to local codes.
Wiring Considerations
For a detailed description of wiring guidelines refer to “Wiring Guidelines” on page 106 of
this manual.
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