Ensure supply air is clean, dry, and filtered according to ISA Standard 7.0.01. Mounting Steps
: This is the most common current series for pneumatic (3582) and electro-pneumatic (3582i) positioning. Instruction Manual D200138X012 (June 2022).
Standard construction handles -40°C to 82°C (-40°F to 180°F). High-temperature options extend this range.
Increase the input signal to the maximum (e.g., 15 psig). Adjust the flapper assembly or span adjustment screw until the valve reaches the full intended travel. Fisher 3560 Valve Positioner Manual Pdf
Connect the instrument signal (3-15 psi) to the "Instrument" port.
Clean, dry instrument air or non-corrosive gas meeting ISA Standard 7.0.01.
Turning the span adjustment changes the effective length of the feedback lever. Step 3: Verify Linearity Cycle the input signal through 25%, 50%, and 75% steps. Ensure supply air is clean, dry, and filtered
Connect the feedback stem or rotation arm. The linkage must sit perpendicular to the valve stem at 50% travel to minimise non-linear linearity errors.
Check that all pneumatic fittings are leak-free using a non-corrosive bubble solution.
Observe the valve position. If the valve stem has not reached its zero stop, turn the until the valve begins to move or rests perfectly at the 0% stroke position. Span Adjustment Standard construction handles -40°C to 82°C (-40°F to
Once you download a file, check the title page. An authentic will display:
Maximum: 50 psig (3.4 bar) or 150 psig (10.3 bar) depending on the specific model capsule.
Repeat these steps until the valve accurately tracks the entire signal range without further adjustment. 5. Maintenance and Common Troubleshooting