Chapter 6 Troubleshooting; Overview - Emerson Rosemount 648 Reference Manual

Reference Manual
00809-0200-4648
6 Troubleshooting
6.1

Overview

The following tables provide summarized maintenance and troubleshooting suggestions
for the most common operating problems. If you suspect malfunction despite the absence
of any diagnostic messages on the Field Communicator display, follow the procedures
described here to verify transmitter hardware and process connections are in good
working order. Always deal with the most likely checkpoints first.
6.1.1 Device status
Electronics failure
Description
An electronics error that could impact the device measurement reading has occurred.
Recommended actions
Terminal block failure
Description
A critical failure has occurred in the transmitter's terminal block.
Recommended actions
Sensor failure
Description
The device has detected an open, short, or too much resistance for this sensor.
Recommended actions
Rosemount 648 Wireless
1. Reset the device.
2. Reconfirm all configuration items in the device.
3. If the condition persists, replace the electronics.
1. Reset the device.
2. Replace the terminal block.
1. Verify the sensor connection and wiring. Refer to the wiring diagrams found on
the terminal compartment to ensure proper wiring.
2. Verify the integrity of the sensor and sensor lead wires. If the sensor is faulty,
repair or replace the sensor.
3. Reconfirm sensor configuration.
4. Replace the sensor.
Troubleshooting
May 2020
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