Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

INSTALLATION

Using Cable Glands

Figure 2-10. Installing the 848T with Cable Glands

Using Conduit Entries

Figure 2-11. Installing the 848T with Conduit Entries

Use the following steps to install the 848T with Cable Glands:

1.Remove the junction box cover by unscrewing the four cover screws.

2.Run the sensor and power/signal wires through the appropriate cable glands using the pre-installed cable glands (see Figure 2-10).

3.Install the sensor wires into the correct screw terminals (follow the label on the electronics module).

4.Install the power/signal wires onto the correct screw terminals. Power is polarity insensitive, allowing the user to connect positive (+) or negative (–) to either Fieldbus wiring terminal labeled “Bus.”

5.Replace the enclosure cover and securely tighten all cover screws.

Enclosure Cover

Sensor 7

Sensor 5

Screw (4)

Sensor 3

 

 

Sensor 1

Power/Signal

 

Sensor 8

Cable Gland

Sensor 6

Sensor 4

 

Sensor 2

Use the following steps to install the 848T with Conduit Entries:

1.Remove the junction box cover by unscrewing the four cover screws.

2.Remove the five conduit plugs and install five conduit fittings (supplied by the installer).

3.Run pairs of sensor wires through each conduit fitting.

4.Install the sensor wires into the correct screw terminals (follow the label on the electronics module).

5.Install the power/signal wires into the correct screw terminals. Power is polarity insensitive, allowing the user to connect positive (+) or negative (–) to either Fieldbus wiring terminal labeled “Bus.”

6.Replace the junction box cover and securely tighten all cover screws.

 

Sensor 3 and 4 Conduit

Sensor 7 and 8 Conduit

 

 

 

Enclosure

 

Sensor

Cover Screw

Sensors

5 and 6

 

Conduit

 

1 and 2

 

Power/Signal

 

Conduit

 

 

 

Conduit

 

 

 

2-12

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Emerson 848T manual Installation, Using Cable Glands, Using Conduit Entries

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.