Spectrex Xenon 700 SIL Open-Path Gas Detection System - Manual (Page 61)

Troubleshooting Problems 49
8 Troubleshooting
➣ In this chapter…
Troubleshooting Problems page 49
8.1 Troubleshooting Problems
Table 21: Troubleshooting Problems
Problem Cause Solution
“Maintenance call”
status or R, S1 and
S2 are below 2.5V DC
at Gain 4
Poor alignment Perform alignment
Dirt on the
window Clean the window
Poor light source Replace the light source
Detector fault
Replace/repair Detector
NQRat1 and NQRat2
below the permitted
limit
Gas in the path Make sure that the path is
clean and the weather
conditions are good
NQRat1 and NQRat2
above the permitted
limit
Poor alignment Perform alignment
R/N, S1/N, S2/N
below 50 Poor alignment Perform alignment
Dirt on the
window Clean the window
Poor light source Replace the light source
Detector fault
Replace/repair Detector
Temperature higher
than 25° C beyond
the room
temperature
Electronic
problem Replace/repair Detector
Ratio1 and Ratio2 out
of the limit Poor alignment Perform alignment
Dirt on the
window Clean the window
Detector fault Replace/repair Detector
Voltage less than 16V
DC. The Detector at
“V” fault
Low input
voltage Check the power supply and
installation