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Reference Manual
00809-0100-4808, Rev CA
June 2008
Rosemount 3051N
4-2
Table 4-1. Rosemount 3051N Troubleshooting Chart.
The Rosemount 3051N is supplied by Rosemount Nuclear Instruments, Inc. as a non-field repairable
device to ensure its qualification status is maintained. The Rosemount 3051N must be returned to
Rosemount Nuclear Instruments, Inc. (RNII) for repairs and/or failure analysis. Instructions for returning
product follow. Any piece parts, if available, must be supplied by RNII to maintain the Rosemount 3051N
qualification status.
Returning Rosemount
Products and Materials
Authorization for return is required from Rosemount Nuclear Instruments Inc.
prior to shipment. Contact Rosemount Nuclear Instruments, Inc. at (952)
949-5210 for details on obtaining Returned Material Authorization (RMA).
Rosemount Nuclear Instruments will not accept any returned material
without Returned Material Authorization. Materials returned without
authorization are subject to be returned to the customer.
Materials returned for repair should be shipped (prepaid) to:
Rosemount Nuclear Instruments, Inc.
8200 Market Blvd
Chanhassen, MN 55317
USA
Symptom Corrective Actions
Milliamp Reading Is Zero
• Check if power polarity is reversed.
• Verify voltage across terminals (should be 10 to 55 V dc).
• Check for bad diode in terminal block.
Transmitter Not Communicating with
HART Communicator
• Check power supply voltage at transmitter (minimum 10.5 V).
• Verify calibration settings (4 and 20 mA points)
• Check load resistance (250 Ω minimum).
• Check if unit is addressed properly.
Milliamp Reading Is Low or High
• Check pressure variable reading for saturation.
• Check if output in alarm condition.
• Verify 4 and 20 mA range points.
• Perform 4–20 mA output trim.
No Response to Changes in
Applied Pressure
• Check test equipment.
• Check impulse piping for blockage.
• Check disabled span adjustment.
• Check if output in alarm condition.
Pressure Variable Reading Is
Low or High
• Check impulse piping for blockage.
• Check test equipment.
• Perform full sensor trim.
Pressure Variable Reading Is Erratic
• Check impulse piping for blockage.
• Check damping.
• Check for EMF interference.