Emerson Model 1700 Manual De Usuario

Emerson

10

Troubleshooting

Topics covered in this chapter:

•

Status LED states

•

Status alarms

•

Flow measurement problems

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Density measurement problems

•

Temperature measurement problems

•

Milliamp output problems

•

Frequency output problems

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Use sensor simulation for troubleshooting

•

Check power supply wiring

•

Check sensor-to-transmitter wiring

•

Check grounding

•

Perform loop tests

•

Trim mA outputs

•

Check the HART communication loop

•

Check HART Address and Loop Current Mode

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Check HART burst mode

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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 for radio frequency interference (RFI)

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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)

•

Check the drive gain

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Check the pickoff voltage

•

Check for electrical shorts

•

Check the core processor LED

•

Perform a core processor resistance test

Troubleshooting

Configuration and Use Manual

173