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

Summary

1. Introduction

Product Description

Provides a general description of the product.

2. Installation

Transducer Mounting

Covers how to mount the transducer.

Pressure Connections

Details the pressure connection types and sizes.

3. Calibration

Standard Performance: Full Range Input, Direct Action Calibration

Calibrating full range input with direct action.

Multirange Performance: Full Range Input, Direct Action Calibration

Calibrating multirange full range input, direct action.

4. Principle of Operation

Electronic Circuit Operation

Explains the function of the electronic circuit.

Pilot Stage Operation

Details the pilot stage operation.

5. Troubleshooting

Troubleshooting Diagnostic Features

Features for diagnosing problems.

Remote Pressure Reading (RPR) Feature

Optional diagnostic feature for remote monitoring.

6. Maintenance

Module Final Assembly Overview

Information on the module final assembly.

Module Final Assembly Removal

Steps to remove the module final assembly.

Electronic Circuit Board Details

Details about the electronic circuit board.

Pilot/Actuator Assembly Information

Information on the pilot/actuator assembly.

7. Parts List

Parts List Cross Reference Table

Cross-reference table for parts.

8. Loop Schematics

CSA Intrinsically Safe Schematics

Wiring schematics for CSA intrinsic safety approvals.