CRANE
CO.
280
N.
MIDLAND
AVE.,
STE
258,
SADDLE
BROOK,
NJ
07663
WWW.AVIDCONTROLS.COM
12/17/12
TECH-440/D.W.O. 23135
Page 6 of 55
1.3 Principle of Operation
Unlike conventional positioners, the SmartCal Smart Positioner feeds back
valve position without the need for linkages, levers, or rotary and linear seals.
Position sensing is performed totally by non-contacting means, permitting use
of advanced control strategies where knowledge of valve position is used in
predictive and other algorithms. By the integration of multiple components into
a singular, cost efficient unit, microprocessor-based intelligence can now be
used to implement advanced functions such as early warning diagnostics.
The SmartCal positioner provides intelligence for the control valve through a
microprocessor-based diagnostic system utilizing HART
®
or Foundation
Fieldbus protocols. Accurate measurement of valve stem position, input signal,
actuator pressure and travel time can be recorded during normal operation,
thereby providing information for control valve signature generation.
Housing Material:
Engineered Resin
Housing Material:
316 Stainless Steel
or Aluminum