Supporting Information For Diagnostic Configuration - GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual

IP Current
IP current is used by the pressure control loop to regulate the actuator pressure. Two alerts
are user configurable for the application:
HI IP Current
LO IP Current
When the valve is in steady state the IP current is in the middle of the expected working range,
balancing the supply and exhaust of pressure to the actuator. Having very high or very low
values of IP current for long time may be indication of a problem in the pressure control loop –
e.g. relay degradation.
Working Time
Working Time is another good indication for valve usage. The SVI FF provides an alert, which
is used to report when the valve has been working longer than the value indicated in the
Working Time Alert Limit.
Combined with the Travel Accumulation and Near Closed Cycle Accumulation, this alert is
used to schedule valve maintenance procedures.
Time Near Closed
Time Near Close is a good indication of possible valve wear, if the alert is too frequent. The
Near Close alert is reported only if the valve had been working with a valid set point and in
Auto mode. The Near Close alert does NOT count if the device is in Tight Closed Condition.
Not writable for the Standard Diagnostics version.

Supporting Information for Diagnostic Configuration

The SVI FF provides a set of unique parameters, which can assist in diagnostic configuration.
Alert Counters
Alert Counters were briefly discussed in the previous section. A total of 25 counters are
provided (one for each alert) to register each alert's occurrences.
The Alert Counters are writable – You can clear all or each counter individually. Clearing the
alert counters may be useful if the alert configuration is changed and to detect whether a
particular problem is a recurring issue.
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Masoneilan SVI FF Instruction Manual
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