Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

Recommended Actions for PlantWeb Alerts

ADVISE_MASK

The ADVISE_MASK parameter will mask any of the failed conditions listed in ADVISE_ENABLED. A bit on means the condition is masked out from alarming and will not be reported.

ADVISE_PRI

ADVISE_PRI designates the alarming priority of the ADVISE_ALM, see Table 3-4 on page 3-11.The default is 0 and the recommended values are 1 or 2.

ADVISE_ACTIVE

The ADVISE_ACTIVE parameter displays which of the advisories is active. Only the advisory with the highest priority will be displayed. This priority is not the same as the ADVISE_PRI parameter described above. This priority is hard coded within the device and is not user configurable.

ADVISE_ALM

ADVISE_ALM is an alarm indicating advisory alarms. These conditions do not have a direct impact on the process or device integrity.

RECOMMENDED_ACTION

The RECOMMENDED_ACTION parameter displays a text string that will give a recommended course of action to take based on which type and which specific event of the PlantWeb alerts are active.

Table 3-7.

RB.RECOMMENDED_ACTION

Alarm Type

Active Event

Recommended Action

None

None

No action is required.

Advisory

PWA Simulate Active

Disable simulation to return to process

 

 

monitoring.

Advisory

Excessive Deviation

 

Advisory

Excessive Rate of

 

 

Change

 

Maintenance

CJC Degraded

If T/C sensors are being used, restart the

 

 

device. If condition persists, replace the

 

 

device.

Maintenance

Body Temperature Out

Verify the ambient temperature is within

 

of Range

operating limits.

Maintenance

Sensor 1 Degraded

Confirm the operating range of Sensor 1

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 2 Degraded

Confirm the operating range of Sensor 2

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 3 Degraded

Confirm the operating range of Sensor 3

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 4 Degraded

Confirm the operating range of Sensor 4

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 5 Degraded

Confirm the operating range of Sensor 5

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 6 Degraded

Confirm the operating range of Sensor 6

 

 

and/or verify the sensor connection and

 

 

device environment.

Maintenance

Sensor 7 Degraded

Conform the operating range of Sensor 7

 

 

and/or verify the sensor connection and

 

 

device environment.

3-14

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Emerson 848T manual Recommended Actions for PlantWeb Alerts, Alarm Type Active Event Recommended Action

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.