Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 71)

6-14 6-15
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<6. BASIC OPERATION>
LASER SPECTRA & CONTROL
Displays Raw Detector Signal and Absorption Spectrum as
well as Gas Concentration, Gas Temperature, Gas Pressure,
Transmission, Laser Temperature, Peak Center Position and
other parameters
CAPTURE – allows a manual spectra capture (user will be
prompted to enter a unique file name for captured spectra)
CONTROL MODE – allows selection of Automatic (laser
temperature is controlled to keep peak centered using peak
center position as set point) or Manual (laser temperature is
controlled using integral laser temperature sensor). Important
auto-tune peak-height threshold values should not be adjusted
without factory guidance – ONLY ADJUST WITH FACTORY
ASSISTANCE
Manual adjustment of the laser temperature set-point (LTS)
may be done with care and factory guidance – used only
to re-adjust the absorption peak position if the peak has
moved outside of the normal operating range – advanced
troubleshooting.
LASER TEMP SETPOINT (LTS) – In manual mode allows
adjustment of laser temperature – ONLY ADJUST WITH
FACTORY ASSISTANCE. NOTE, the analyzer will return to
automatic mode if un-touched for 30 minute!
LTSP LIMITS – setting of guard limits for laser temperature set
point – ONLY ADJUST WITH FACTORY ASSISTANCE
MAX CURRENT – setting of center point for laser current ramp
–ONLY ADJUST WITH FACTORY ASSISTANCE
FAST UP-DATE – this function can be Enabled (faster
update times) or Disabled (normal operation) as necessary.
When enabled, the analyzer up-date is approximate twice
as fast as normal to allow for faster/easier alignment during
commissioning or troubleshooting. Normal up-date time is
restored automatically after 30 minutes when the screen saver/
backlight feature also enables
ADVANCED CALIBRATE & VALIDATE MENU
OFFLINE CALIBRATIONS – allows zero calibration, zero offset,
span calibration, transmission adjustment,
OFFLINE VALIDATIONS – allows manual or automatic
configuration of check gases 1 or 2 or a separate two gas
check
ONLINE VALIDATIONS – allows manual or automatic
configuration
CLEAR VALIDATION ALARMS – allows the user to clear
the validation alarm if the user knows that the analyzer is
functioning and tuned to correct absorption peak.