SMAR ld301, Инструкция по эксплуатации и техническому обслуживанию

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LD301 – Operation and Maintenance Instruction Manual
5.2
ERROR MESSAGES POTENTIAL SOURCE OF PROBLEM
SV OUT OF LIMITS
• Temperature out of operating limits.
•
Temperature sensor damaged.
PV OUT OF LIMITS
•
Pressure out of operation limits.
• Sensor damaged or sensor module not connected.
• Transmitter with false configuration.
LOWER RANGE VALUE TOO HIGH • Lower value exceeds 24% of the Upper Range Limit.
LOWER RANGE VALUE TOO LOW
•
Lower value exceeds 24% of the Lower Range Limit.
UPPER RANGE VALUE TOO HIGH •
Upper value exceeds 24% of the Upper Range Limit.
UPPER RANGE VALUE TOO LOW • Upper value exceeds 24% of the Lower Range Limit.
UPPER & LOWER RANGE VALUES
OUT OF LIMITS
• Lower and Upper Values are out of the sensor range limits.
SPAN TOO SMALL
•
The difference, between the Lower and Upper values is less than the 0.75 x (minimum span).
APPLIED PRESURE TOO HIGH •
The pressure applied was above the 24% upper range limit.
APPLIED PRESURE TOO LOW • The pressure applied was below the 24% lower range limit.
EXCESS CORRECTION •
The trim value entered exceeded the factory-characterized value by more than 10%.
PASSED PARAMETER TOO LARGE • Parameter above operating limits.
PASSED PARAMETER TOO SMALL
•
Parameter below operating limits.
Table 5.1 - Error Messages and Potential Source
DIAGNOSTIC WITH THE TRANSMITTER
Symptom : NO LINE CURRENT
Probable Source of Trouble :
Transmitter Connections
•
Check wiring polarity and continuity.
• Check for shorts or ground loops.
•
Check if the power supply connector is connected to main board.
Power Supply
• Check power supply output. The voltage must be between 12 and 45 Vdc at transmitter
terminals.
Electronic Circuit Failure
• Check the main board for defect by using a spare one.
Symptom : NO COMMUNICATION
Probable Source of Trouble :
Terminal Connections
•
Check the terminal interface connection of the configurator.
•
Check if the interface is connected to the wires leading to the transmitter or to the terminals
[
+ ] and [ - ].
•
Check if the interface is models IF3 (for Hart protocol).
Transmitter Connections
• Check if connections are according to wiring diagram.
• Check if there is resistance in the 250
Ω
line.
Power Supply
•
Check output of power supply. The voltage at the LD301 terminals must be between 12 and 45
Vdc, and ripple less than 500 mV.