Flowserve UEX Limitorque - Manual (Page 28)

Limitorque UEX FCD LMENIM1205-03-AQ – 05/15
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8.2 Analog Position Transmitter (APT)
The APT is an internally powered, non-contacting valve position transmitter. The isolated output signal
is proportional to the position of the valve and is available as 4–20 mA and/or 0-20 mA, 0-10 VDC, 2-10
VDC, 0-5 VDC, or 1-5 VDC.
The user may select the minimum signal to represent either the fully OPEN or the fully CLOSE position
of the valve during the setup procedure.
• Accuracy = 99% of full scale value (for Drive Sleeve Turns > 50)
• Non-Linearity = ± 1% of full scale value
• Impedance = 0–600 ohms (4–20 mA signal)
• Minimum external load = 1000 ohms (0–10 VDC signal)
8.3 Two-Speed Timer
A two-speed pulsing timer can be enabled to extend the operating time in the close and/or the open
directions. Pulsing may be applied from 0.5 (if precision is set to xxx.x%) to 99% of full valve travel or
to a small portion. The ON pulsing cycle is configurable from 0.5 to 20 seconds in 0.5 second incre-
ments, and the OFF pulsing cycle is configurable from 1.0 to 200 seconds in 1 second increments. The
two-speed timer is especially effective where concerns of hydraulic shock exist.
8.4 Control Station (CSE)
The CSE is a separate control station designed for the operation of inaccessible actuators. It is available
with LEDs, Remote/Local and Open/Close selector switches. The CSE may be powered by the actuator
internal supply, provided wire resistance and other external loads do not limit the available signal power
presented to the UEX.