Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

Grounded Thermocouple Inputs

1.Ground sensor wiring shield(s) at the sensor.

2.Ensure that the sensor wiring and signal wiring shields are electrically isolated from the transmitter enclosure.

3.Do not connect the signal wiring shield to the sensor wiring shield(s).

4.Ground signal wiring shield at the power supply end.

848T

Power Supply

Sensor Wires

Shield ground points

Analog Device Inputs

1.Ground analog signal wire at the power supply of the analog devices.

2.Ensure that the analog signal wire and the fieldbus signal wire shields are electrically isolated from the transmitter enclosure.

3.Do not connect the analog signal wire shield to the fieldbus signal wire shield.

4.Ground fieldbus signal wire shield at the power supply end.

Analog Device Power Supply

4-20 mA loop

 

FOUNDATION

 

fieldbus bus

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

Analog

848T

 

 

 

 

 

 

Supply

Device

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shield ground points

Transmitter Enclosure (optional)

Ground the transmitter in accordance with local electrical requirements.

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Emerson Transmitter Enclosure optional, 848T Power Supply Sensor Wires Shield ground points, MA loop, Fieldbus bus

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.