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Intermittent alarms can be difficult to catch. If a temperature transmitter goes into an alarm state that quickly disappears, the identity of the alarm may remain unknown. Intermittent alarm condition causes could be anything from a "Transmitter Out Of Operating Range" alert to a vibrating sensor wire temporarily disconnecting and reporting an "Open Sensor" alarm.
The Rosemount 3144P offers a Diagnostics Log that records which alerts and alarms have occurred since the last device reset. Alarm information can be retrieved even if the event has disappeared, making it easier to troubleshoot alarms.
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Temperature transmitters are often installed in areas where the ambient temperature fluctuates. Use a Rosemount 3144P with Min/Max Temperature Tracking to verify that installation temperatures have not exceeded recommended operation limits.
Minimum and Maximum Temperature Tracking also records the minimum and maximum temperatures reached by the sensors and their differentials. Use this capability when troubleshooting output quality issues to ensure optimal temperatures were not exceeded.
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Standard sensor curves are loaded into the transmitter at the factory. Every RTD temperature sensor is unique, and is characterized by a polynomial equation known as the Callendar-`Van Dusen equation.
The Rosemount 3144P features the Transmitter-Sensor Matching capability, which enables you to upload the coefficients from a sensor’s unique Callendar Van Dusen (CVD) equation. These CVD coefficients alter the factory-standard curve for that RTD type to match its own unique sensor, minimizing the error due to the sensor and resulting in a more accurate temperature point.
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When process temperatures fluctuate beyond certain values, it is beneficial to know the fluctuation is occurring. Configurable process alerts allow users to customize alarms and alerts that are activated when specific temperatures are exceeded.
Customized alerts can be ideal for applications with unique or critical setpoints. For the Rosemount 3144P with 4-20 mA/HART(r) output, customize the High and Low Alarm and Saturation Levels. For the 3144P with FOUNDATION (tm) fieldbus output, configure the HI-HI, HI, LO and LO-LO Alert Limits.
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Every Rosemount 3144P is characterized across its operating range to determine how ambient temperature changes affect its measurement.
This characterization is uploaded into the transmitter. The 3144P utilizes this characterization and internal references to compensate for any ambient temperature effects that the transmitter experiences, resulting in the most reliable measurement possible, despite an extreme ambient environment.
