rotork YT-2700, Руководство по эксплуатации продукта

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Smart Positioner
YT-2700 Product Manual
Ver. 1.18
6
2 Product Description
2.1 General
YT-2700 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.
➢
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 positioners is -30 ~ 80
℃
(Please check certified explosion proof
temperature)
➢
Hand calibration function can set Zero point or End point manually.
➢
It has IP66 protection grade.
➢
Epoxy polyester powder coating resists the corrosion process.
➢
Maintenance of the positioner is easy because of modularized inner structure.