High Density Temperature Measurement
Many important processes have temperature points within close proximity. Emerson delivers a proven and innovative transmitter family that provides a cost-effective, reliable way to access these measurements.
The Rosemount 848T High Density Measurement transmitters are designed specifically forFOUNDATION™ fieldbus and WirelessHART™ industry standards. These solutions provide a variety of benefits including:
Reduce wiring and conduit costs by measuring multiple points with a single transmitter
Minimize start-up time with fewer devices to install and commission
Avoid shutdowns with proactive maintenance by using device and sensor diagnostic
Rosemount 848T Foundation fieldbus Temperature Transmitter
The first choice for high density temperature measurement applications.
The Rosemount 848T FOUNDATION™ fieldbus temperature transmitter simplifies and reduces the cost of a plant’s process control architecture. It eliminates traditional temperature monitoring methods (wire direct, low cost single input transmitters, and multiplexers) with an intrinsically safe, eight input transmitter that mounts beside the process. The use of FOUNDATION™ fieldbus enables a new, ground breaking method to measure temperature. When combined with the Rosemount 3420 Fieldbus Interface Module, Rosemount 848T measurements can be interfaced to existing systems.
Features & Benefits
Accepts eight independently configurable RTD, thermocouple, ohm, | |
Powers PlantWeb® by providing multi-sensor measurement | |
Reduces the need for signal wiring and can cut capital | |
Installs next to process for shorter wire runs reducing the | |
Easily integrates existing analog instrumentation into FOUNDATION -1 Multiple Analog Input (MAI) function block to efficiently -4 Input Selector (ISEL) function blocks for selecting Average, -Backup Link Active Scheduler (LAS) ensures measurement -8 Analog Input (AI) function blocks to communicate individual |
848T installed cost savings are integrated on a non-fieldbus host -Communicates up to 128 temperature measurements on two wires using -Communicates process variables and measurement status using -Easy device configuration and maintenance using a PC with a Specifications |
| Key Specifications | |
| Digital Accuracy | ±0.30°C (±0.54°F) for Pt100 RTD ±0.70°C (±1.26 °F) for Type J Thermocouple |
| Ambient Temperature Effects | 0.003 °C per 1 °C change in ambient temperature for PT100 |
| Stability | 0.1% reading or 0.1°C whichever is greater for 2 years for RTD ±0.1% of reading or 0.1°C, whichever is greater for one year for thermocouples |
| Input | 8 channels (combination of 2-3 wire RTD’s, thermocouples, millivolts and ohms) 4-20 mA inputs using optional connectors |
| Output | FOUNDATION™ fieldbus Manchester-encoded digital signal that conforms to IEC 1158-2 and ISA 50.02 |
| Supply Voltage/Current Consumption | 9.0 to 32.0 V dc; 22ma maximum |