Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

Special Conditions of Safe Use (x):

1.The component must be housed in a suitable certified enclosure.

2.Provisions shall be made, external to the apparatus, to prevent the rated voltage (42.2 V dc) being exceeded by transient disturbances of more than 40%.

IECEx Certifications

I7 IECEx Intrinsic Safety

Certificate No.: IECExBAS09.0030X

Ex ia IIC T4 (Tamb = –50 to 60 °C)

Table B-12. IECEx Approved Entity Parameters

Power/Bus

Ui = 30 V

Ii = 300 mA Pi = 1.3 W Ci = 2.1 μF Li = 0

Sensor

Uo = 12.5 V Io = 4.8 mA Po = 15 mW Ci = 1.2 μF Li = 1 H

Special Conditions of Safe Use (x):

1.The apparatus must be installed in an enclosure that provides a degree of protection of at least IP20. Non-metallic enclosures must be suitable to prevent electrostatic hazards and light alloy or zirconium enclosures must be protected from impact and friction when installed.

2.The apparatus is not capable of withstanding the 500V isolation test required by IEC 60079-11: 2006 clause 6.3.12. This must be taken into account when installing the apparatus.

IG IECEx FISCO

Certificate No.: IECExBAS09.0030X

Ex ia IIC T4 (Tamb = – 50 to 60 °C)

Table B-13. IECEx Approved Entity Parameters

Power/Bus

Sensor

Ui =17.5 Vdc

Uo = 12.5 Vdc

Ii = 380 mA

Io = 4.8 mA

Pi = 5.32 W

Po = 15 mW

Ci = 2.1 μF

Ci = 1.2 μF

Li = 0

Li = 1 H

Special Conditions of Safe Use (x):

1.The apparatus must be installed in an enclosure that provides a degree of protection of at least IP20. Non-metallic enclosures must be suitable to prevent electrostatic hazards and light alloy or zirconium enclosures must be protected from impact and friction when installed.

2.The apparatus is not capable of withstanding the 500V isolation test required by IEC 60079-11: 2006 clause 6.3.12. This must be taken into account when installing the apparatus.

B-7

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Emerson 848T manual Special Conditions of Safe Use, IECEx Certifications

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.