In situ probe with improved diagnostics and compensation

摘要

A process combustion transmitter is provided. The transmitter includes a process probe extendible into a flow of process combustion exhaust. The process probe has a measurement cell and a diffuser that define a chamber within the process probe. Electronic circuitry is coupled to the measurement cell and is configured to provide an indication relative to a combustion process based on an output signal of the measurement cell. A pressure sensor is coupled to the electronic circuitry and is fluidically coupled to the chamber. The electronic circuitry is configured to provide an adjusted calibration based on pressure measured within the chamber during a calibration.

主权项

1. A process combustion transmitter comprising;
a process probe extendible into a flow of process combustion exhaust, the process probe having a measurement cell and a diffuser, the measurement cell and the diffuser defining a chamber within the process probe; electronic circuitry coupled to the measurement cell and configured to provide an indication relative to a combustion process based on an output signal of the measurement cell; a pressure sensor operably coupled to the electronic circuitry and fluidically coupled to the chamber; and wherein the electronic circuitry is configured to provide an adjusted calibration based on pressure measured within the chamber during a calibration, and wherein the electronic circuitry is configured to provide an indication of diffuser plugging based on pressure measured during the calibration.