Pdf — Fisher 3560 Valve Positioner Manual

[Apply Low Signal] ---> [Adjust Zero Screw] ---> [Check 0% Stroke] | v [Apply High Signal] <-- [Adjust Span Nut] <--- [Check 100% Stroke] Zero Adjustment

Maximum pressures can reach up to 10.4 bar (150 psig) depending on the specific configuration, while the minimum is typically around 2.4 bar (35 psig).

What are you trying to solve (e.g., calibration drift, leaks)? What type of actuator is it currently mounted to? Share public link

An electro-pneumatic positioner featuring an integrated I/P (current-to-pressure) transducer, accepting a standard 4 to 20 mA DC control signal. Technical Specifications Fisher 3560 Valve Positioner Manual Pdf

Connect clean, dry air to the "Supply" port (1/4 NPT).

Understanding the performance limits of the 3560 series is critical for safe operation:

Ensure a calibrated pressure gauge is connected to the instrument and output lines for visual verification. Zero and Span Adjustments: [Apply Low Signal] ---> [Adjust Zero Screw] --->

Verify supply regulator setting; Clean the nozzle; Perform a leak test on the actuator casing.

Apply the minimum input signal (e.g., 4 mA or 3 psi).

: Check the regulator setting. Tighten all linkage pins and bracket bolts. Slow Response Time Zero and Span Adjustments: Verify supply regulator setting;

A: 1.4 bar (20 psig). Below this, the positioner will not stroke the actuator fully.

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Typically 100 psig (6.9 bar) for standard configurations.

Clean/replace filters. Tighten all linkages and check for mechanical play. Blocked nozzle, torn bellows, or failed relay diaphragm.