Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 135)

9-9 9-10
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<9. TROUBLE SHOOTING>
Warning Action Steps
Process Pressure out of range. The gas pressure
range for the application is programmed into the
analyzer. Check pressure transducer feed to analyzer
Check to ensure software setting
(Advanced Menu, Configure) is correct
Process Temperature out of range. The gas
temperature range for the application is
programmed into the analyzer. Check pressure transducer feed to analyzer
Check to ensure software setting
(Advanced Menu, Configure) is correct
Concentration out of range. The process
pressure range for the application is
programmed into the analyzer. Check to ensure software setting
(Advanced Menu, Configure) is correct
L or D unit temp out of range. The Launch Unit
and Detect Unit have built in temperature
sensors. This diagnostic is triggered if they
sense the ambient temperature is outside of the
analyzer design range
(-5 to 55C) Check purge system flows and excessive
heat output from SBC and/or other
electronic components
Look for excessive heat output from
adjacent processes and/or radiant process
and/or direct sunlight
9.4 Analyzer faults
For analyzer faults it is recommended that you contact Yokogawa Laser Analysis Division immediately. There is
typically no user intervention that should be attempted unless specifically diagnosed or directed by Yokogawa.
Yokogawa Laser Analysis Division personnel will step you through diagnostic and repair steps.
Laser Temperature Out of Range. This is an indication that the system can not control the laser
temperature, resulting in wavelength instability of the laser.
Detector Signal High. Detector is saturated (i.e. too much detector signal gain) or has been damaged.
If using on a high temperature application in excess of 700 ˚C then please check to ensure the
analyzer was specified for high temperature service. Detector Signal High fault alarm can occur when
high temperature infrared radiation saturates a standard low temperature gas configured analyzer. Refer to
“Adjustment of Detector Signal Gain” for further assistance.
Detector Signal Lost. The analyzer is not receiving a detector signal – please check all electrical
connections and follow the procedure for Troubleshooting Low or Lost Transmission.
Peak Center Out of Range. Indication that the system can not keep the peak centered in the scan
range. Please review the absorption spectra to check the actual peak position, check that some target gas
in the optical path – capture spectra and send to Yokogawa Laser Analysis Division or local agent for
further assistance.