E-8 | Model 888 ATEX IECEx Tail Gas Analyzer
Cell RTD Defective [10]
The software monitors the condition of the Resistive Temperature De-
tector (RTD) that monitors cell temperature. If the device fails, a Level 1
alarm occurs. The RTD could be defective or one of the three RTD wires
may have been disconnected.
User intervention is needed to clear the alarm condition.
Demister RTD Defective [11]
The software monitors the condition of the Resistive Temperature Detec-
tor (RTD) that monitors demister temperature. If the device fails, a Level 1
alarm is asserted.
User intervention is needed to clear the alarm condition. The RTD could
be defective or one of the three RTD wires may have been disconnected.
Flange RTD Defective [12]
The software monitors the condition of the Resistive Temperature Detec-
tor (RTD) that monitors the temperature of the mounting flange. If the
device fails, a Level 2 alarm occurs because the analyzer is still capable of
making concentration measurements. However, flange temperature can-
not be monitored until the RTD is repaired.
User intervention is needed to clear the alarm condition. The RTD could
be defective or one of the three RTD wires may have been disconnected.
Oven Heater RTD Open [13]
The software monitors the condition of the Resistive Temperature Detec-
tor (RTD) that monitors heater temperature in the oven. If the device fails,
a Level 1 alarm occurs. This is a safety issue as the heater cannot be al-
lowed to exceed 200 °C and reach the auto-ignition temperature of pro-
cess gas. There are two redundant sensors in the heater.
User intervention is needed to clear the alarm condition. The RTD could
be defective or one of the three RTD wires may have been disconnected.
To Next Page
Loading...
