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 Wireless Temperature Transmitter
A Wireless Solution for High Density Temperature Measurement Applications
Many users across the process industry need to monitor hundreds to thousands of temperature measurements in a plant to ensure efficient operations. The 848T Wireless monitors up to four independently configurable RTD, thermocouple, ohm, millivolt and 4 – 20 mA inputs allowing users access to more temperature measurements without any signal wire. Increased visibility to plant operations allows for proactive maintenance and monitoring of key assets such as motor bearings that drive pumps, fans and compressors, as well as heat exchangers, tanks, reactors and boilers.
Fully compatible with any WirelessHART™ network, the Rosemount 848T Wireless provides the same rich diagnostic data and reliable performance as other devices in the Smart Wireless family. It monitors many temperature measurements with one device ensuring accurate and stable measurements and continuously monitors measurement integrity. The device is self-powered and utilizes SmartPower™ to provide an intrinsically safe power module with long battery life.
Features & Benefits
Four independently configurable RTD, thermocouple, ohm, millivolt and 4 - 20 mA signals
Lowers installed cost by eliminating long wire runs to the control room
Dependable performance by enhancing measurement reliability for trustworthy data
-Mount close to process to keep sensor wiring short to minimize effect of electromagnetic interference(EMI)
-Transmitters compensate and filter noise and EMI for stable measurement performance
Simplified installation and configuration practices for faster start-ups
-Reduction of required loop drawings, eliminates cable trays and large wiring cabinets
-Enhanced user interface makes configuration intuitive for faster configuration and commissioning
Fully compatible with WirelessHART networks with greater than 99% data reliability
Eight user configurable alerts for advanced measurement monitoring
Temperature sensor diagnostics for continuous monitoring of sensor integrity
Type 4x, IP66 housings allows for installation in harsh process environments
Best ambient temperature compensation reduces measurement error in harsh applications, especially for wide fluctuations of ambient temperature
Specifications
| Reference Accuracy | ± 0.3°C (± 0.54°F) PT100 @ 20°C |
| ± 0.70 °C (± 1.26 °F) for Type J Thermocouple | |
| Stability | ±0.15% reading or 0.15 °C (0.27 °F), whichever is greater for 2 years for RTD |
| ±0.15% of reading or 0.15°C (0.27 °F), whichever is greater for one year for thermocouples | |
| Input | 2, 3, 4-wire RTD, thermocouples, mV, ohm, and 4-20 mA signals |
| Output | WirelessHART™ |
| Power Module | 1 minute update rate – 6 years |
| 10 minute update rate – 10 years | |
| Update Rate | User selectable 4 seconds to 60 minutes |