Orange Instruments introduces its new 200 series of valve actuator positioners. The IS200 Intrinsically safe electronic actuator positioner has been designed and manufactured specifically for upstream and downstream oil and gas industry applications. The IS200 can be incorporated in new projects, or as part of a retrofit programme to existing valves. The instrument works by comparing two analogue signals, one representing the desired position (command signal) and the other corresponding to the existing position (feedback signal) of the actuator. The difference between the two signals will cause one of the IS200 outputs to operate, driving the actuator to its required position. Some of the instrument’s features include: simple two-step calibration; 4-20mA current command signals and current or potentiometer feedback signal; manual mode; selectable solenoid drive for failsafe operation; actual position calibrated output; stepping mode with adjustable on/off times so speed of actuator transit can be reduced; and selectable default operation on command/feedback signal break.
