CRANECO.
280N.MIDLANDAVE.,STE258,SADDLEBROOK,NJ07663WWW.AVIDCONTROLS.COM
12/17/12 TECH-440/D.W.O. 23135 Page 8 of 55
Remote Position Control
Since valve position feedback to the SmartCal positioner
is accomplished by non-contact means, the SmartCal has
the unique ability to be mounted remotely (up to a distance
of 50 feet, optionally 150 feet) from the device it is
controlling. The remote position sensor also has the ability
to work over a wider temperature range, from -40C to
125C (-40F to 257F). In the event the control valve is
located in a high vibration, high temperature or extremely
corrosive environment, the non-contact position feedback
feature allows for isolated placement of the positioner.
Local Graphic LCD
The SmartCal positioner is supplied with a digital
communication interface (FF, HART
®
) or a 3-button keypad interface. Both versions are furnished
with a graphic LCD, and allow for automated calibration of the
positioner. The local LCD provides a multitude of onsite diagnostic
information. The LCD shows input current, set-point and current
position. The values displayed range from 0.0% to 100.0%. Displayed
resolution is in 0.1% increments, however, internal calculations are
maintained at higher precision.
On-Board Sensors
The SmartCal positioner has the capability to monitor its operation. If an error or failure condition
occurs, it will be displayed on the local LCD, or if the positioner is supplied with a HART
®
interface,
the error codes will be displayed on a hand held terminal or a PC maintenance station. Note: Error
codes are denoted on a label affixed to the LCD flip-up protective cover.
Local Keypad
The positioner is provided with a ruggedized 3-button keypad. The keypad can be
used for zero and span adjustments, as well as valve characterization and gain
adjustments.
Intelligent Calibration (HART
®
Protocol)
The SmartCal positioner responds to HART
®
commands for seeking the “valve
closed” position and assigns an instrument signal of 4 mA to this position. The
counterpart of the operation for a full open state is implemented next by setting the span value.
Action reversal is also configured. Additionally, provisions are made for altering internal servo
loop tuning via the HART
®
link. In this manner, positioner performance may be optimized with a
wide combination of valves and actuators.
Negligible Bleed
Designed to consume the least possible amount of control air at steady state, the SmartCal
positioner can greatly reduce the air consumption of your process and reduce the demand on
instrument air compressors. To increase reliability, the SmartCal employs a patented lapped spool
and floating sleeve design. This balanced construction relies on an air bearing which eliminates
any metal to metal contact.
VID
SmartCal HART Rev 1.01.06
25.5°C
R %PS 50.0 %SP 50.0
12.0 mA OK
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