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10 Troubleshooting
Topics covered in this chapter:
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Status LED states
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Status alarms
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Flow measurement problems
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Density measurement problems
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Temperature measurement problems
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Milliamp output problems
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Frequency output problems
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Use sensor simulation for troubleshooting
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Check power supply wiring
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Check sensor‐to‐transmitter wiring
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Check grounding
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Perform loop tests
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Check for radio frequency interference (RFI)
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Check the HART communication loop
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Check HART Address and Loop Current Mode
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Check HART burst mode
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Check the trimming of the mA output
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Check Lower Range Value and Upper Range Value
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Check mA Output Fault Action
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Check Frequency Output Maximum Pulse Width
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Check Frequency Output Scaling Method
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Check Frequency Output Fault Action
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Check Flow Direction
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Check the cutoffs
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Check for slug flow (two‐phase flow)
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Check the drive gain
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Check the pickoff voltage
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Check for electrical shorts
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Check the core processor LED
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Perform a core processor resistance test
Troubleshooting
Configuration and Use Manual 143