© 2021 Baker Hughes Company. All rights reserved. Masoneilan SVi1000 Positioner Quick Start Guide | 61
Table 8: Operational Specifications
Accuracy
+/- 1.0% (typical 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
o
Rotary: 18 - 140°
o
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.
o
Linear
o
Equal Percentage (of 50:1 or 30:1)
o
Camflex
o
Quick Opening
(inverse of 50:1 equal percentage)
o
User Configurable
Tight Shut Off
0 -20% of input
Position Auto Tune
SVi1000 performs automatic
determination of the optimal valve
position control parameters. In addition
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 negligible overshoot. After
the Auto Tune process is completed, the
user can further adjust the positioner
tuning parameters to more conservative
or to more responsive values.
o
Proportional gain: 0 to 5000
o
Integral time: 0 to 100 seconds -
dis played as 0 to 1000 (1/10s)
o
Derivative time: 0 to 200 ms
o
Dead Zone: 0 to +/-5%
(0 to 10% dead band)
o
Padj: +/- 3000 (depends on P)
o
Beta (non-linear gain factor): -9 to +9
o
Position compensation coefficient:
1 to 20
o
Boost: 0 to 20
Stroking Time
0 to 250 seconds
Full open position adjustment
60 to 100% of actual travel
Start Up Time (from no power)
Less than 500 ms
Minimum current to maintain HART
®
3.4 mA
HART
®
Command#3 Mapping
o
HART
®
4-20 mA input signal
o
PV= Valve Position, 0-100%
o
SV = N/A
o
TV = Reserved
o
QV = Reserved
