Table of Contents
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3710 and 3720 Positioners
September 2017
Contents (cont'd)
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Introduction
Scope of Manual
This instruction manual includes installation, operation, calibration, maintenance, and parts ordering information for
the Fisher 3710 pneumatic positioner and 3720 electro-pneumatic positioner.
This manual also provides field installation and maintenance information for the Fisher 3722 electro-pneumatic
converter. Refer to separate instruction manuals for information on the actuator, control valve, and other accessories.
Do not install, operate, or maintain a 3710 pneumatic positioner, a 3720 electro-pneumatic positioner or a 3722
electro-pneumatic converter without being fully trained and qualified in valve, actuator and accessory installation,
operation and maintenance. To avoid personal injury or property damage it is important to carefully read, understand,
and follow all of the contents of this manual, including all safety cautions and warnings. If you have any questions
about these instructions, contact your
Description
The 3710 pneumatic positioner and 3720 electro-pneumatic positioner are used with either diaphragm actuators
(spring return) or piston rotary actuators (spring return or double-action) as shown in figure 1. These positioners
provide a valve ball or disk position for a specific input signal. These positioners can easily be configured to provide
single- or double-action output for rotary actuators.
The 3710 pneumatic positioner accepts a pneumatic input signal. The 3720 electro-pneumatic positioner accepts a
milliampere (mA), direct current (DC), input signal. Refer to table 1 for an explanation of type numbers.
The 3710 pneumatic positioner provides a valve position for a standard pneumatic input signal. The positioner may
also be split-ranged. See table 3 for input signal ranges.
The 3720 electro-pneumatic positioner provides a valve position for a milliampere (mA), direct current (DC), input
signal. The positioner may also be split-ranged. See table 3.
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or Local Business Partner before proceeding.
Instruction Manual
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- Quick Links:
- Installing the 3722 Converter
- Calibration
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