Emerson Rosemount 327T, Quick Start Manual

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Parameter Description
drF Drift failure threshold drF = drA + 5.4 °F (3 °C) . If the temperature
measurement exceeds the deviation value, the temperature transmitter sends
a failure diagnostic message.
Note
• The drF value is a result of the drA setting. drF cannot be set.
• Setting drA to OFF automatically results in: drF = 14.4 °F (8 °C)
ddr Delay of the drift detection. The time which the drift value must be above the
warning threshold drW or alarm threshold drA before the temperature
transmitter sends a diagnostic signal (0.5 - 300 minutes).
drEd Sets which diagnostic cases the temperature transmitter communicates.
• ON: Limits the diagnostic cases to "failure" cases.
• ONdr: Limits the diagnostic cases to "alarm" and "failure" cases.
• OFF: Limits the diagnostic cases to "warning", "alarm" and "failure" cases.
FOU2 Response of the analog signal when a diagnostic case occurs. Instead of the
measured temperature value, the temperature transmitter provides a defined
current value according to Namur NE43 (On: 21.5 mA; OFF: 3.5 mA).
dOU1 Response of the diagnostic switching output after a diagnostic case occurs.
The output opens, closes, or pulsates depending on the configuration.
P-n The switching logic for the diagnostic output: pnp or npn.
HI Displays the highest recorded temperature measurement.
LO Displays the lowest recorded temperature measurement.
Fnr Shows the fault number. For more information, see Troubleshooting .
rES Restores factory default settings.
Note
Record the current parameter settings before restoring the factory default
settings.
3.2 Operating mode
Eight seconds after applying power, the temperature transmitter is in run mode and is
operating within specifications. In run mode, the transmitter measures and evaluates
temperature and provides output signals according to parameter settings.
Operation Quick Start Guide
January 2019 00825-0100-4329
18 Quick Start Guide