Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

OVERVIEW

Transmitter

The Rosemount 848T is optimal for process temperature measurement

 

because of its ability to simultaneously measure eight separate and

 

independent temperature points with one transmitter. Multiple temperature

 

sensor types may be connected to each 848T transmitter. In addition, the

 

848T can accept 4-20 mA inputs. The enhanced measurement capability of

 

the 848T allows it to communicate these variables to any FOUNDATION

 

fieldbus host or configuration tool.

Manual

This manual is designed to assist in the installation, operation, and

 

maintenance of the Rosemount 848T Temperature Transmitter.

Section 1: Introduction

Overview

Considerations

Return of Materials

Section 2: Installation

Mounting

Installation

Wiring

Power Supply

Commissioning

Section 3: Configuration

FOUNDATION fieldbus Technology

Configuration

Function Block Configuration

Section 4: Operation and Maintenance

Hardware Maintenance

Troubleshooting

Appendix A: Specification and Reference Data

Specifications

Dimensional Drawings

Ordering Information

Appendix B: Product Certificates

Hazardous Locations Certificates

Intrinsically Safe and Non-Incendive Installations

Installation Drawings

Appendix C: Foundation™ Fieldbus Technology

Device Descriptions

Block Operation

Appendix D: Function Blocks

Analog Input (AI) Function Block

Multiple Analog Input (MAI) Function Block

Input Selector Function Block

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Emerson 848T manual Overview, Transmitter, Manual, Fieldbus host or configuration tool

848T specifications

The Emerson 848T is a state-of-the-art temperature transmitter designed for accurate and reliable temperature measurement in various industrial applications. This device has gained recognition for its advanced features and robust performance, making it a popular choice among engineers and technicians in the field.

One of the key highlights of the Emerson 848T is its unique dual-channel capability, which allows it to seamlessly monitor two temperature sources simultaneously. This functionality is particularly beneficial in processes where multiple temperature points need to be assessed, optimizing efficiency and reducing the need for additional equipment. It supports various sensor types, including thermocouples, RTDs, and resistance temperature detectors, making it versatile for different applications.

The 848T is equipped with sophisticated digital processing technology, which enhances its accuracy and stability. It features a 24-bit analog-to-digital converter, ensuring precise measurement and minimizing drift over time. Moreover, the device boasts a wide operating temperature range, accommodating ambient conditions from -40°C to 85°C. This durability makes it suitable for harsh environments commonly encountered in industries such as oil and gas, pharmaceuticals, and power generation.

Another significant characteristic of the Emerson 848T is its configurable output options. Users can choose from a range of output signals, including 4-20 mA, which provides a standard interface for integration into existing control systems. Additionally, it offers a HART communication protocol, allowing for easy configuration, calibration, and diagnostics through a digital interface. This feature enhances the transmitter's usability, enabling operators to perform adjustments without direct access to the device.

The device is designed with user-friendliness in mind. Its intuitive setup procedure and robust graphical user interface simplify the commissioning process, ensuring that even those new to the technology can easily navigate the system. An integrated LCD display provides real-time readings and status information, facilitating monitoring at a glance.

In summary, the Emerson 848T temperature transmitter combines reliable performance, user-friendly design, and advanced digital technologies. Its dual-channel capability, wide sensor compatibility, and adjustable output options make it an essential tool for achieving precise temperature measurements in various industrial settings. With these compelling features, the Emerson 848T stands out as a leading choice for professionals seeking accuracy and efficiency in their temperature monitoring applications.