Emerson Rosemount 935, Reference Manual

Page: 51 / 76

7.7 NQ Ratio below the permitted limit
Host status = F
0-20 = 1 mA
Light-emitting diode (LED) = yellow, blinking
Table 7-7: Potential cause and resolution
Potential cause Resolution
Gas in path Ensure that the path is clean and the weather
conditions are good.
7.8 NQ Ratio above the permitted limit
Host status = F
0-20 = 1 mA
LED = yellow, blinking
Table 7-8: Potential cause and resolution
Potential cause Resolution
Poor alignment Align.
7.9 Ratio out of the limit
Host status = F
0-20 = 1 mA
LED = yellow, blinking
Table 7-9: Potential causes and resolutions
Potential cause Resolution
Poor alignment Align.
Dirt on the window Clean the window.
Detector fault Replace or repair the detector.
7.10 Source fault
Yellow light-emitting diode (LED) blinking at the source
Table 7-10: Potential Causes and Resolutions
Potential cause Resolution
Low/high input voltage Check the power supply and installation.
Internal fault Replace the source.
Reference Manual Troubleshooting
00809-0100-4035 May 2022
Rosemount 935 51