Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

Table 3-13. SENSOR_STATUS Sub-Parameter Structure

Sensor Status Table

0x00

Active

0x01

Out of Service

0x02

Inactive

0x04

Open

0x08

Short

0x10

Out of Range

0x20

Beyond Limits

0x40

Excess EMF Detected

0x80

Other

Table 3-14. SENSOR_CAL

 

 

Sub-Parameter Structure

SENSOR CALIBRATION

 

 

STRUCTURE

 

 

Parameter

Description

 

SENSOR_NUMBER

The sensor number to calibrate

 

CALIB_POINT_HI

The High calibration point for the selected sensor

 

CALIB_POINT_LO

The Low calibration point for the selected sensor

 

CALIB_UNIT

The engineering units used for calibrating the sensor

 

 

The method of the last calibration for sensor

 

CALIB_METHOD

103 - factory trim standard calibration

 

 

104 - user trim standard calibration

 

CALIB_INFO

Information regarding the calibration

 

CALIB_DATE

Date that the calibration was completed

 

 

The minimum calibration span value allowed. This minimum span

 

CALIB_MIN_SPAN

information is necessary to ensure that when calibration is done,

 

 

the two calibrated points are not too close together

 

CALIB_PT_HI_LIMIT

The High calibration unit

 

CALIB_PT_LO_LIMIT

The Low calibration unit

 

 

 

Table 3-15. CAL_STATUS Structure

Cal Status

0No Command Active

1Command Executing

2Command Done

3Command Done: Errors

Table 3-16. Transducer Status Sub-Parameter Structure

Transducer Status Table

0x01 A/D Failure

0x02 Sensor Failure

0x04 Dual Sensor Failure

0x08 CJC Degraded

0x10 CJC Failure

0x20 Body Temp Failure

0x40 Sensor Degraded

0x80 Body Temperature Degraded

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Emerson 848T manual Sensorstatus Sub-Parameter Structure, Sensorcal Sub-Parameter Structure, Calstatus 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.