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Masoneilan SVI II AP Digital Positioner Quick Start Guide | 84
Table 9
Operational Specifications
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°
Reciprocating: 0.25” - 2.5“ (6 mm - 64 mm)
Note:
Above 2.5” (64 mm) 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)
Auto Tune
SVI II AP performs automatic determination of the
optimal valve positioner control parameters. In addi-
tion to P, I, D, the position algorithm uses damping,
symmetry for exhaust and fill time constants, dead
zone and magnitude characterization parameters.
Auto Tune is optimized for 5% step changes with neg-
ligible overshoot. After the Auto Tune process is com-
pleted, the user can further adjust the positioner
tuning parameters to more conservative or to more
responsive values.
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
HART
®
Command #3 Mapping
HART
®
4-20 mA input signal
PV = Valve Position, 0-100%
SV = Actuator Pressure (P1-P2) (N/A for standard
diagnostic version; units sends zero)
TV = Supply Pressure
QV = P2 for double acting units (N/A for standard
diagnostic version; units sends zero)
Содержание Masoneilan SVI II AP Series
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