Emerson Fisher 846 User Manual

D102005X012
www.Fisher.com
Instruction Manual
Form 5739
February 2002
Introduction
Type 846 and Model 3311 Current-to-Pressure
Transducers
Contents
1. Introduction
Scope of Manual 1–2. . . . . . . . . . . . . . . . . . . . . . . . .
Description 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Installation
Mounting 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Connections 2–1. . . . . . . . . . . . . . . . . . . .
Supply Pressure 2–1. . . . . . . . . . . . . . . . . . . . . . . .
Output Pressure 2–5. . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections 2–7. . . . . . . . . . . . . . . . . . . .
Stroke Port 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Port 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Interruption 2–8. . . . . . . . . . . . . . . . . . . . . . . .
3. Calibration
Standard Performance:
Full Range Input, Direct Action 3–1. . . . . . . . . .
Multirange Performance:
Full Range Input, Direct Action 3–2. . . . . . . . . .
Standard Performance:
Split Range Input, Direct Action 3–3. . . . . . . . . .
4 to 12 mA Input Signal 3–3. . . . . . . . . . . . . . . . . .
12 to 20 mA Input Signal 3–3. . . . . . . . . . . . . . . . .
Standard Performance:
Full Range Input, Reverse Action 3–3. . . . . . . .
Multirange Performance:
Full Range Input, Reverse Action 3–3. . . . . . . .
Standard Performance:
Split Range Input, Reverse Action 3–4. . . . . . .
4 to 12 mA Input Signal 3–4. . . . . . . . . . . . . . . . . .
12 to 20 mA Input Signal 3–4. . . . . . . . . . . . . . . . .
10 to 50 mA Input Signal 3–5. . . . . . . . . . . . . . . . .
Transporting the Module Final Assembly 3–5. . . .
4. Principle of Operation
Electronic Circuit 4–1. . . . . . . . . . . . . . . . . . . . . . . . .
Magnetic Actuator 4–1. . . . . . . . . . . . . . . . . . . . . . . .
Pilot Stage 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Booster Stage 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Troubleshooting
Diagnostic Features 5–1. . . . . . . . . . . . . . . . . . . . . .
Stroke Port 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Pressure Reading (RPR) 5–1. . . . . . . . .
Using the HART
R
Communicator to
Read the RPR Signal 5–1. . . . . . . . . . . . . . . .
Using a Frequency Counter to
Read the RPR Signal 5–2. . . . . . . . . . . . . . . .
In-service Troubleshooting 5–3. . . . . . . . . . . . . . . .
Troubleshooting in the Shop 5–5. . . . . . . . . . . . . . .
6. Maintenance
Module Final Assembly 6–1. . . . . . . . . . . . . . . . . . .
Removing the Module Final Assembly 6–1. . . . .
Replacing the Module Final Assembly 6–3. . . . .
Electronic Circuit Board 6–4. . . . . . . . . . . . . . . . . . .
Optional Remote Pressure Reading (RPR)
Jumper 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Range Jumper 6–5. . . . . . . . . . . . . . . . . . . . . . . . .
Action 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Electronic Circuit Board 6–5. . . . .
Product Change 6–5. . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Electronic Circuit Board 6–6. . . . .
Pilot/Actuator Assembly 6–6. . . . . . . . . . . . . . . . . . .
Action 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Pilot/Actuator Assembly 6–6. . . . .
Replacing the Pilot/Actuator Assembly 6–7. . . . .
Module Subassembly 6–7. . . . . . . . . . . . . . . . . . . . .
Terminal Compartment 6–7. . . . . . . . . . . . . . . . . . .
Exhaust and Stroke Port Screens 6–8. . . . . . . . . .
7. Parts List
8. Loop Schematics

Emerson Fisher 846 Specifications

General

Brand	Emerson
Model	Fisher 846
Category	Transducer
Language	English