Smart Positioner
YT-2500 / 2550 / 2501 Series
Product Manual
Ver. 1.34
7
2
Product Description
2.1
General
YT-2500 / 2550 / 2501 series Smart Valve Positioner accurately controls valve stroke in response to
an input signal of 4~20mA from the controller. Built-in micro-processor optimizes the positioner’s
performance and provides unique functions such as
Auto-Calibration, PD Control, and HART
Protocol Communications.
2.2
Main Features and Functions
➢
When Input signal fails, Positioner keeps the current position of the valve stroke without any
additional device. (Fail Freeze option)
➢
LCD display enables users to monitor the positioner status.
➢
User will easily understand the method of using 4 buttons because it work same in all versions of
firmware interfaces.
➢
Positioner operates normally even there are sudden changes in supply pressure and / or high
vibration environment.
➢
YT-2501 is stronger on high temperature and vibration environment because it is separated into
remote sensor and positioner.
➢
The method of Auto Calibration is very simple.
➢
As an advantage of having very low air consumption, it could greatly reduce operating costs in
large-scale plants.
➢
It is compatible with most of controllers.
➢
Variable orifices can be used to minimize the hunting occurrence and optimize operating
conditions.
➢
Various information about positioner can be processed by HART communication. (option)
➢
Valve system becomes more stable by outputting analog feedback signal.
➢
Different valve characteristics can be adjusted – Linear, Quick Open, Equal Percentage, and User
Set which user can make 5 points or 18 points characterizations.
➢
Tight Shut – Close and Shut - Open can be set.
➢
PD parameters can be adjusted in the field without any additional communicator.
➢
Split range 4~12mA or 12~20mA can be set.
➢
Operating temperature for remote sensor of YT-2501 series is -40 ~ 120°C
.
Operating temperature for positioners is -30 ~ 80°C (Please check certified explosion proof
temperature)
➢
Hand calibration function can set Zero point or End point manually.
➢
It has IP66 protection grade.
➢
Polyester powder coating resists the corrosion process. (except YT-2550)
➢
Maintenance of the positioner is easy because of modularized inner structure.