Emerson Rosemount 8782 - Page 126

Table 12-1: Basic diagnostic messages
Error message Potential cause Corrective action
Empty Pipe Empty pipe None - message will clear when pipe is full
Wiring error Check that wiring matches appropriate wiring
diagrams
Electrode error Perform sensor tests - see Installed sensor tests
Conductivity less than 50
microSiemens per cm
Increase conductivity to greater than or equal to 50
microSiemens per cm
Intermittent diagnostic Adjust tuning of empty pipe parameters - see
Troubleshooting empty pipe
Coil Open Circuit Improper wiring Check coil drive wiring and sensor coils
Perform sensor tests - see Installed sensor tests
Electronics board failure Contact an Emerson Flow representative (see back
page)
Auto Zero Failure Flow is not set to zero Force flow to zero, perform auto zero trim
Unshielded cable in use Change wire to shielded cable
Moisture problems See Installed sensor tests
Electronics Failure Electronics self check failure Cycle power to see if diagnostic message clears
Contact an Emerson Flow representative (see back
page)
Electronics Temp Fail Ambient temperature exceeded the
electronics temperature limits
Move transmitter to a location with an ambient
temperature range of -40 to 140 °F (-40 to 60 °C)
Reverse Flow Electrode or coil wires reverse Verify wiring between sensor and transmitter
Flow is reverse Turn ON Reverse Flow Enable to read flow
Sensor installed backwards Install sensor correctly, or switch either the
electrode wires (18 and 19) or the coil wires (1 and
2)
PZR Activated (Positive
Zero Return)
External voltage applied to terminals
11 and 12
Remove voltage to turn PZR off
Pulse Out of Range The transmitter is trying to generate a
frequency greater than allowed
Standard pulse - increase pulse scaling to prevent
pulse output from exceeding 11,000 Hz
Intrinsically safe pulse - Increase pulse scaling to
prevent pulse output from exceeding 5,500 Hz
Pulse output is in fixed pulse mode and is trying to
generate a frequency greater than the pulse width
can support - see Pulse output
Verify the sensor calibration number and line size
are correctly entered in the electronics
Analog Out of Range Flow rate is greater than analog output
range
Reduce flow, adjust URV and LRV values
Verify the sensor calibration number and line sizes
are correctly entered in the electronics
Troubleshooting Reference Manual
November 2019 00809-0100-8782
126 Rosemount
®
8782 Slurry Magnetic Flow Meter Transmitter with HART Protocol