Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

China (NEPSI)Certifications

I3 Intrinsic Safety

Ex ia IIC T4

Certification Number: GYJ111365X

Special Conditions for Safe Use (x):

2.1. Only when temperature transmitter is installed in IP 20(GB4208-2008) housing, it could be used in hazardous location. The metallic housing should observe the requirements of GB3836.1-2000 Clause 8. The non-metallic housing should observe the requirements of GB3836.1-2000 Clause 7.3. This apparatus is not capable of withstanding the 500V rms insulation test required by Clause 6.4.12 of GB3836.4-2000.

2.2. The ambient temperature range is:

Output

T code

Ambient temperature

F

T4

-50 °C < Ta < + 60 °C

 

 

 

2.3. Parameters:

Terminals of power/loop (1-2):

 

Maximum

 

 

 

 

Output

Output Voltage:

Maximum

Maximum

 

 

Uo (V)

Output Current:

Output Power:

Maximum external

 

 

 

Io (mA)

Po (mW)

parameters:

 

 

 

 

Co (μF)

Lo (H)

F

30

300

1.3

2.1

0

F (FISCO)

17.5

380

5.32

2.1

0

 

 

 

 

 

 

NOTE

Non-FISCO parameters listed above must be derived from a linear supply with a resistance limited output.

Terminals of sensor:

 

 

Maximum

Maximum

Maximum

 

 

Output

Terminals

Output Voltage:

Output Current:

Output Power:

Maximum external

 

 

Uo (V)

Io (mA)

Po (mW)

parameters:

 

 

 

 

 

Co (μF)

Lo (H)

F

1-8

12.5

4.8

15

1.2

1

2.4.The product complies to the requirements for FISCO field devices specified in IEC60079-27: 2008. For the connection of an intrinsically safe circuit in accordance FISCO model, FISCO parameters of this product are as above.

2.5.The product should be used with Ex-certified associated apparatus to establish explosion protection system that can be used in explosive gas atmospheres. Wiring and terminals should comply with the instruction manual of the product and associated apparatus.

2.6.The cables between this product and associated apparatus should be shielded cables (the cables must have insulated shield). The shielded cable has to be grounded reliably in non-hazardous area.

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Emerson 848T manual China NEPSICertifications, Parameters Terminals of power/loop

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.