10 Troubleshooting
Topics covered in this chapter:
• Quick guide to troubleshooting
• Check power supply wiring
• Check grounding
• Perform loop tests
• Status LED states
• Status alerts, causes, and recommendations
• Density measurement problems
• Temperature measurement problems
• API referral problems
• Concentration measurement problems
• Velocity measurement problems
• Milliamp output problems
• Discrete output problems
• Time Period Signal (TPS) output problems
• Using sensor simulation for troubleshooting
• Trim mA outputs
• Check HART communications
• Check Lower Range Value and Upper Range Value
• Check mA Output Fault Action
• Check for radio frequency interference (RFI)
• Check Flow Direction
• Check the cutoffs
• Check for two‐phase flow (slug flow)
• Check the drive gain
• Check the pickoff voltage
• Check for internal electrical problems
• Locate a device using the HART 7 Squawk feature
10.1 Quick guide to troubleshooting
The meter may report or exhibit issues that are caused by installation problems, wiring
problems, configuration problems, process problems, problems with external devices, or
mechanical issues with the sensor itself.
Troubleshooting
Configuration and Use Manual 135
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