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General| Brand | Metso |
|---|---|
| Model | NE700 Series |
| Category | Valve Positioners |
| Language | English |
Explains operation based on torque balance, force coil, and feedback spring for actuator positioning.
Provides detailed technical specifications for input signal, split ranges, input resistance, and environmental conditions.
Highlights critical safety warnings regarding performance limitations, pressurized components, and live voltage.
Provides step-by-step instructions for mounting the NE700/S1 positioner onto Metso actuators with VDI/VDE 3845 face.
Explains how to connect the supply air and actuator lines (C1, C2) to the positioner, referencing diagrams and notes.
Specifies requirements for instrument air supply, including cleanliness, dryness, oil-freeness, and pressure limits.
Outlines the procedure for basic adjustment of the positioner for rotary and butterfly valves, including zero and range settings.
Explains the α₀ adjustment for segment and ball valves to account for dead angles and utilize the full signal range.
Details the process of marking the shift on the cam and setting the roller contact point for dead angle compensation.
Explains how to perform split-range adjustments similar to normal ranges, by selecting appropriate cam plate segments.
Provides guidance on electrical fault diagnosis using measurement terminals, including voltage and current checks and possible faults.
Lists common mechanical defects, their causes (e.g., supply pressure, leaks, jammed parts), and symptoms.
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