Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 134)

9-9
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<9. TROUBLE SHOOTING>
If there is any sign of a transmission signal then try adjusting the angles very slightly to see if any stronger
signal can be obtained. If, after adjusting the direct angle between the two units there is still no transmission
then the laser diode (and or detector) has failed. Please contact Yokogawa Laser Analysis Division for further
assistance and information pertaining to Laser Module replacement. If a weak signal is achieved then this is
an indication that the laser module has weak output power. Please contact Yokogawa Laser Analysis Division
as this may be caused by dirt/contamination on one of the internal optical surfaces (usually caused by
contaminated purge gas).
9.1.2 Off Process (or Off-Line)
• Clean Process Windows. Visually inspect and clean analyzer windows.
• Check Analyzer with Validation Standard. Mount the analyzer on a calibration or flow cell and perform
Basic Menu zero and span check – capture spectrum for each condition.
•
Record Results. Download data files from the analyzer for e-mail to Yokogawa Laser Analysis Division
9.2 field Up-Gradable files and Software from factory
The analyzer has the capability to upload certain software and files that are supplied by the factory for field use.
Any files that are to be uploaded to the TDLS-200 should be done so via the factory supplied SanDisk USB
memory stick and only when instructed to do so by factory (or factory authorized personnel).
Please also ensure that the USB is inserted only into the allocated analyzer for which the files were intended
otherwise, damage and files corruption may occur. Please also ensure (before copying any of the following
factory supplied up-load files) the USB stick is empty.
Available field up-loadable files include:
√ “TruePeak.exu” in USB memory to upgrade “TruePeak.exe”.
√ “TruePeak.uiu” in USB memory to upgrade “TruePeak.uir”.
√ “system.upl” in USB memory to replace “system.cfg”.
√ “system.lau” in USB memory to replace “system.las”.
√ “zero00.upl” in USB memory to replace “zero00.spe”.
√ “span00.upl” in USB memory to replace “span00.spe”.
9.3 Analyzer Warnings
Warning Action Steps
Detector Signal Low. This is based on the amount of
signal generated by the detector. Refer to Low or Lost Transmission
procedure
Transmission Low. This is the most
important diagnostic feature of the
analyzer. Transmission is a measurement of the laser
power striking the detector. It is an arbitrary number
(%) that can be calibrated. The analyzer, mounted on
a calibration cell in the factory, is calibrated at 100%
transmission when leaving the factory. Adjust analyzer alignment
Clean windows
Check on calibration/flow cell
Set analyzer so that Launch and Detect Unit
flanges are butted together
Refer to Low or Lost Transmission
procedure
Spectrum Noise High. This is based on a
measurement of the noise (standard deviation)
of the absorption peak baseline regions. Adjust analyzer alignment
Clean windows
Check on calibration/flow cell
Set analyzer so that Launch and Detect Unit
flanges are butted together