Dresser Masoneilan SVI II AP-2, Quick Start Manual

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Masoneilan Dresser SVI II AP Quick Start Guide
A-2
Table 9 Operational Specifications
* Specifications are subject to change without notice
Accuracy +/- 0.5% (t/-0. 10% or less) Full Span
Hysteresis and Deadband +/- 0.3% Full Span
Repeatability +/- 0.3% Full Span
Conformity +/- 0.5% Full Span
Start-Up Drift Less than 0.02% in first hour
Long Term Drift Less than 0.003% per month
Position Travel Limits Rotary: 18 - 140 degrees
Reciprocating: 0.25” - 2.5“ (12mm - 64mm)
Note: Above 2.5” (64mm) consult factory for mounting
instructions.
Flow Characteristics
Applied in addition to the control valve’s inherent
characteristic. Linear
Equal Percentage (of 50:1 or 30:1)
Camflex
Quick Opening (inverse of 50:1 equal percentage)
User Configurable
Tight Shut Off (0 -20% of input)
Position Auto Tune
SVI II AP performs automatic determination of the op-
timal valve position control parameters. In addition to
P, I, D, the position algorithm uses damping, symme-
try for exhaust and fill time constants, dead zone and
magnitude characterization parameters. Auto Tune is
optimized for 5% step changes with negligible over-
shoot. After the Auto Tune process is completed, the
user can further adjust the positioner tuning parame-
ters to more conservative or to more responsive val-
ues.
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
Full open position adjustment 60 to 100% of actual stop
Start Up Time (from no power) Less than 200 mS
Minimum current to maintain HART 3.0 mA