Flowserve Logix 3800zb User Manual

Logix™ 3800zb Digital Positioner FCD AIIOM001030_EN 02/23
flowserve.com 31
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Sticking or hunting
operation of the positioner
1. Contamination of the 4-Way control
valve.
2. Control tuning parameters not
correct.
3. Packing friction is high.
4. Improper sizing of Valve/Actuator for
process conditions.
1. Check air supply for proper filtering and meeting
ISA specifications ISA-7.0.01.
2. Lower proportional gain settings. Use the Gain
switch.
3. Verify the Valve and Actuator are sized properly
for operating conditions.
LCD backlight is flickering
or dim.
1. The backlight uses any residual
power not used by other functions of
the circuitry.
1. Fluctuations in the LCD backlight are normal. No
action required.

Flowserve Logix 3800zb Specifications

General

Brand	Flowserve
Model	Logix 3800zb
Category	Industrial Equipment
Language	English