Emerson MMI-20019043 Manuel D’Utilisation

Emerson

12

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

207