Unstable Readings

Unstable or noisy readings may be symptomatic of a contaminated flow system.  Hydrocarbon contamination can occur in multiple areas: external components, like the fuel or air supplies, external frits and filters, regulators or supply tubing; internal flow components, such as pressure regulators and gauges; and finally, with water or condensation infiltration of the burner itself.

Contamination issues can be mitigated with intensive cleaning of the suspect components, or with their replacement.

 

Keywords: Rosemount 400A troubleshooting