Emerson Fisher 3570 Handbook

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Fisher
r
3570 Pneumatic Valve Positioners
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Valve Positioner Type Numbers 2.............
Specifications 4...............................
Educational Services 4.........................
Installation, Mounting, and Connections 5..........
Installation 5.................................
Diagnostic Test Connections (Optional) 6.....
Connections 7................................
Piping Sizes 7.............................
Vent 8...................................
Supply Pressure Connections 9..............
Cylinder Connections 10....................
Instrument Connection 10..................
Operating Information 11........................
Initial Adjustments 11..........................
Signal Range Codes 11.........................
Frequency Response 12........................
Adjustment Procedures 14......................
Changing Positioner Action 17..................
Split Range Operation 19.......................
Initial Range Spring Extension Procedure
for 3570P and 3570PC Positioners 19..........
Principle of Operation 21........................
3570, 3570C, 3570P, 3570PC, and
3571 Valve Positioners 21....................
3572 and 3576 Valve Positioners 22..............
3573 and 3577 Valve Positioners 23..............
Relay Operation 24............................
Maintenance 25................................
Troubleshooting 26............................
Converting a 3570 Valve Positioner to a
3570C Valve Positioner 27....................
Range Spring 28..............................
Disassembly 28...........................
Assembly 28..............................
Figure 1. Fisher 3570 Positioner Mounted on
470 Actuator
W5566*/IL
Bias Spring 29................................
Disassembly 29...........................
Assembly 29..............................
Parts Ordering 29...............................
Parts Kits 30...................................
Positioner Repair Kits 30........................
Diagnostic Test Connection Kits 30...............
Parts List 30...................................
Positioner Common Parts 30....................
Introduction
Scope of Manual
This manual provides installation, operation, adjustment, maintenance, and parts ordering information for Fisher
3570 pneumatic valve positioners. The various product types within this series are described later in this manual. Refer
Instruction Manual
D200137X012
3570 Positioners
September 2011