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Accuracy
Hysteresis and Deadband
Repeatability
Conformity
Start-Up Drift
Long Term Drift
Position Travel Limits
Position Auto Tune
SVI II ESD performs automatic determina-
tion of the optimal valve position control
parameters. In addition to P, I, D, the posi-
tion algorithm uses damping, symmetry for
exhaust and fill time constants, dead zone
and magnitude characterization parame-
ters. Auto Tune is optimized for 5% step
changes with negligible overshoot. After
the Auto Tune process is completed, you
can further adjust the positioner tuning
parameters to more conservative or to
more responsive values.
Start Up Time (from no power)
Minimum current to maintain HART
74 | =BHGE
Table 11: Operational Specifications
®
© 2018 Baker Hughes, a GE company, LLC. All rights reserved.
+/- 0.5% (typical +/-0. 10% or less) Full Span
+/- 0.3% Full Span
+/- 0.3% Full Span
+/- 0.5% Full Span
Less than 0.02% in first hour
Less than 0.003% per month
Rotary: 18 - 140°
Reciprocating: 0.25" - 2.5" (6 mm - 64 mm)
Note: Above 2.5" (64 mm) consult factory for
mounting instructions.
Proportional gain: 0 to 5, displayed as 0 to
5000
Integral time: 0 to 100 seconds - displayed
as 0 to 1000 (1/10s)
Derivative time: 0 to 200 milliseconds
Dead Zone: 0 to +/-5% (0 to 10% deadband)
Padj: +/- 3000 (depends on P)
Beta (non-linear gain factor): -9 to +9
Stroking Time: 0 to 250 seconds
Position compensation coefficient: 1 to 20
Boost: 0 to 20
Less than 200 mS
3.0 mA
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