Emerson Rosemount 327T, Быстрый старт

Страница: 21 / 26

5 Troubleshooting
This table includes the steps needed to correct errors with the temperature transmitter.
1. Connect the temperature transmitter to a PC.
2. Read the value for the parameter Fnr .
3. Take corrective measures as instructed by this table:
Fnr Type of fault Corrective measures
0 No fault, no anomaly occurred. None
20 Internal malfunction in the transmitter
electronics. Replace the temperature transmitter.
21 Sensor backup is active, possibly because a
sensor element failed. 1. Replace the temperature transmitter.
2. Continue measurement with only one
sensor element while waiting for
replacement transmitter:
• In two-wire operation, set drEd to
ON so the remaining temperature
sensor element can communicate
the measured temperature value
using the analog signal. In this
case, the analog output provides
diagnostics in case of a failure.
• In three-wire operation, the
temperature transmitter can signal
all diagnostic cases using the
switching output except those
used for drift monitoring
(diagnostic cases 1, 3, 7).
30 Wiring fault Check the wiring.
42 The temperature is outside the allowable
temperature range. The analog signal is
21.5 mA (FOU2 = On) or 3.5 mA (FOU2 =
OFF) 1. Check measuring range.
2. Adjust ASP and AEP values to
accommodate the operating
conditions or correct the process
temperature.
71 Detected sensor drift exceeds warning level
drW
At the first detected drift.
1. Check if the parameter drW is
programmed correctly.
2. Prepare replacement of the unit.
72 Drift exceeds alarm threshold drA . The
temperature measurement might be less
accurate.
1. Check that the parameter drA is
programmed correctly.
2. Replace the temperature transmitter.
Quick Start Guide Troubleshooting
00825-0100-4329 January 2019
Quick Start Guide 21