Emerson Fisher 846 Instruction Manual
Current-to-pressure transducer
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Also See for Fisher 846:
- Instruction manual supplement (3 pages) ,
- Instruction manual (48 pages)
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Instruction Manual
D102005X012
Fisher
846 Current-to-Pressure Transducer
™
Contents
Introduction
Scope of Manual
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Description
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Specifications
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Educational Services
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Installation
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Hazardous Area Classifications and Special
Instructions for Safe‐Use and Installation
in Hazardous Locations
Mounting
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Pressure Connections
Supply Pressure
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Output Pressure
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Electrical Connections
Venting Ports
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Signal Interruption
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Calibration
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Standard Performance:
Full Range Input, Direct Action
Multirange Performance:
Full Range Input, Direct Action
Standard Performance:
Split Range Input, Direct Action
4 to 12 mA Input Signal
12 to 20 mA Input Signal
Standard Performance:
Full Range Input, Reverse Action
Multirange Performance:
Full Range Input, Reverse Action
Standard Performance:
Split Range Input, Reverse Action
4 to 12 mA Input Signal
12 to 20 mA Input Signal
Transporting the Module Final Assembly
Principle of Operation
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Electronic Circuit
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Magnetic Actuator
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Pilot Stage
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Booster Stage
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Troubleshooting
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Diagnostic Features
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Stroke Port
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www.Fisher.com
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Figure 1. Fisher 846 Current‐to‐Pressure Transducer
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X0234
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Remote Pressure Reading (RPR)
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Using a Frequency Counter to read the
RPR Signal
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In‐service Troubleshooting
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Troubleshooting in the Shop
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Maintenance
Module Final Assembly
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Removing the Module Final Assembly
Replacing the Module Final Assembly
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Electronic Circuit Board
Remote Pressure Reading (RPR) Jumper
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Range Jumper
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Action
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Removing the Electronic Circuit Board
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Replacing the Electronic Circuit Board
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Pilot/Actuator Assembly
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Action
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Removing the Pilot/Actuator Assembly
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Replacing the Pilot/Actuator Assembly
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Module Subassembly
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Terminal Compartment
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Exhaust and Stroke Port Screens
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Parts
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846 Transducer
February 2021
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Summary of Contents for Emerson Fisher 846
- Page 1 846 Current-to-Pressure Transducer ™ Contents Figure 1. Fisher 846 Current‐to‐Pressure Transducer Introduction Scope of Manual ......
- Page 2 Scope of Manual This instruction manual provides installation, operating, calibration, maintenance, and parts ordering information for Fisher 846 current‐to‐pressure transducers. Refer to separate manuals for instructions covering equipment used with the transducers. Do not install, operate or maintain an 846 current‐to‐pressure transducer without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance.
- Page 3 Instruction Manual 846 Transducer D102005X012 February 2021 Table 1. Specifications Per ISO 8573-1 Input Signal Maximum particle density size: Class 7 Standard Performance: Oil content: Class 3 4 to 20 mA DC, 4 to 12 mA DC, or 12 to 20 mA DC. Pressure Dew Point: Class 3 or at least 10°C less than Field adjustable split ranging.
- Page 4 PESO CCOE— Petroleum and Explosives Safety Remote Pressure Reading (RPR) Organization - Chief Controller of Explosives (India) Jumper selectable, ON or OFF, if unit includes Contact your Emerson sales office option classification/certification specific information Frequency Range: 0 to 10,000 Hz Amplitude: 0.4 to 1.0 V p‐p...
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