Rosemount 8732
Reference Manual
Troubleshooting Empty Pipe
GROUND/WIRING FAULT DETECTION
Ground/Wiring Fault Parameters
The following actions can be taken if Empty Pipe detection is unexpected.
1.Verify the sensor is full.
2.Verify that the sensor has not been installed with a measurement electrode at the top of the pipe.
3.Decrease the sensitivity by setting the Empty Pipe Trigger Level to a value above the Empty Pipe Value read with a full pipe.
4.Decrease the sensitivity by increasing the Empty Pipe Counts to compensate for process noise. The Empty Pipe Counts is the number of consecutive Empty Pipe Value readings above the Empty Pipe Trigger Level required to activate the Empty Pipe alert. The count range is
5.Increase process fluid conductivity above 50 microsiemens/cm.
6.Properly connect the wiring between the sensor and the transmitter. Corresponding terminal block numbers in the sensor and transmitter must be connected.
7.Perform the sensor electrical resistance tests. Confirm the resistance reading between coil ground (ground symbol) and coil (1 and 2) is infinity, or open. Confirm the resistance reading between electrode ground (17) and an electrode (18 or 19) is greater than 2 kohms and rises. For more detailed information, consult Table
The Ground/Wiring Fault Detection diagnostic provides a means of verifying installations are done correctly. If the installation is not wired or grounded properly, this diagnostic will activate and deliver a PlantWeb alert. This diagnostic can also detect if the grounding is lost
Turning Ground/Wiring Fault On/Of
The Ground/Wiring Fault diagnostic can be turned on or off as required by the application. If the advanced diagnostics suite 1 (D01 Option) was ordered, then the Ground/Wiring Fault diagnostic will be turned on. If D01 was not ordered or licensed, this diagnostic is not available.
The Ground/Wiring Fault diagnostic has one
Line Noise
Reads the current amplitude of the Line Noise. This is a
