Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

Transducer Block Channel Definitions

Table 3-8. Channel Definitions for the 848T

Figure 3-1. Transducer Block Data Flow

The 848T supports multiple sensor inputs. Each input has a channel assigned to it allowing an AI or MAI Function Blocks to be linked to that input. The channels for the 848T are as follows:

Channel

Description

 

Channel

Description

1

Sensor One

 

16

Sensor 3 Deviation

2

Sensor Two

 

17

Sensor 4 Deviation

3

Sensor Three

 

18

Sensor 5 Deviation

4

Sensor Four

 

19

Sensor 6 Deviation

5

Sensor Five

 

20

Sensor 7 Deviation

6

Sensor Six

 

21

Sensor 8 Deviation

7

Sensor Seven

 

22

Sensor 1 Rate Change

8

Sensor Eight

 

23

Sensor 2 Rate Change

9

Differential Sensor 1

 

24

Sensor 3 Rate Change

10

Differential Sensor 2

 

25

Sensor 4 Rate Change

11

Differential Sensor 3

 

26

Sensor 5 Rate Change

12

Differential Sensor 4

 

27

Sensor 6 Rate Change

13

Body Temperature

 

28

Sensor 7 Rate Change

14

Sensor 1 Deviation

 

29

Sensor 8 Rate Change

15

Sensor 2 Deviation

 

 

 

 

Linearization

Temperature Compensation

Units/Ranging

 

Channel1

S1

 

 

Channel

S2

A/D

 

2

Signal

 

Channel

S3

Conversion

 

3

 

 

Channel

S4

 

 

 

 

 

4

 

 

 

 

 

Channel

S5

CJC

 

 

 

 

5

 

 

 

Damping

Channel

 

 

 

 

 

Channel6

S6

 

Diagnostics

 

Measurement

7

S7

 

 

Channel

 

 

 

Validation

S8

 

 

 

 

 

8

 

 

 

 

 

Channel

DS1

 

 

 

 

 

9

 

 

 

 

 

Channel

DS2

 

 

 

 

 

10

 

 

 

 

 

Channel

 

 

 

 

 

 

11

DS3

 

 

 

 

 

Channel

DS4

 

 

 

 

 

12

 

 

 

 

 

Channel

BT

 

 

 

 

 

13

Transducer Block Errors

The following conditions are reported in the BLOCK_ERR and XD_ERROR parameters.

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Emerson manual Transducer Block Channel Definitions, Channel Definitions for the 848T, Transducer Block Errors

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.