Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

Transducer Block Sub-Parameter Tables

Table 3-11. XD_ERROR Sub-Parameter Structure

 

XD ERROR

Description

0

No Error

 

17

General Error

An error has occurred that could not be classified as

 

one of the errors listed below.

 

 

18

Calibration Error

An error occurred during calibration of the device or a

 

calibration error has been detected during operation of

 

 

the device.

19

Configuration Error

An error occurred during configuration of the device or

 

a configuration error has been detected during

 

 

operation of the device.

20

Electronics Failure

An electronic component has failed.

22

I/O Failure

An I/O failure has occurred.

23

Data Integrity Error

Indicates that data stored within the system may no

 

longer be valid due to non-volatile memory checksum

 

 

failure, data verify after write failure, etc.

24

Software Error

The software has detected an error. This could be

 

caused by an improper interrupt service routine, an

 

 

arithmetic overflow, a watchdog timer, etc.

25

Algorithm Error

The algorithm used in the transducer block produced

 

an error. This could be due to an overflow, data

 

 

reasonableness.

Table 3-12. SENSOR_CONFIG

 

 

Sub-Parameter Structure

SENSOR CONFIG

 

 

STRUCTURE

 

 

Parameter

Description

 

SENSOR_MODE

Disables or enables a sensor for configuration.

 

SENSOR_TAG

Sensor description.

 

SERIAL_NUMBER

Serial number for the attached sensor.

 

SENSOR

Sensor Type and Connection. MSB is the sensor type and

 

 

LSB is the connection.

 

DAMPING

Sampling Interval used to smooth output using a first order

 

 

linear filter. A value entered between 0 and the Update_Rate,

 

 

will result in a damping value equal to the Update_Rate.

 

INPUT_TRANSIENT_FILTER

Enables or Disables the option for reporting fast changing

 

 

sensor inputs without temporary holdoff. 0 = Disable, 1 =

 

 

Enabled.

 

RTD_2_WIRE_OFFSET

User entered value for constant lead-wire resistance

 

 

correction in a 2-wire RTD and Ohm sensor types.

 

ENG_UNITS

The engineering units used for reporting measured sensor

 

 

values.

 

UPPER_RANGE

The upper sensor limit for the selected sensor is displayed

 

 

using Units_Index sub parameter.

 

LOWER_RANGE

The lower sensor limit for the selected sensor is displayed

 

 

using Units_Index sub parameter.

3-20

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Emerson 848T Transducer Block Sub-Parameter Tables, Xderror Sub-Parameter Structure, Sensorconfig Sub-Parameter Structure

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.