Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 72)

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IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<6. BASIC OPERATION>
OffLINE CALIBRATIONS
ZERO CALIBRATION – manual or automatic calibration of
Zero - ensure there is no absorption peak feature before
performing a zero calibration, failure to do so can result is false
low readings later when the un-desired target gas has been
removed.
ZERO OFFSET – allows manual adjustment of Zero by applying
a concentration offset – use only with factory guidance
SPAN CALIBRATION – manual or automatic calibration of
Span – use only when sure the purge paths are correctly
configured
TRANSMISSION – adjustment of transmission value
DARK CURRENT – DISABLED feature,
factory use only
PEAK SEARCH – DISABLED feature that initiates a system
scan of absorption peaks to validate current peak selection is
correct,
factory use only
OffLINE VALIDATIONS
CHECK GAS 1 to 2 – allows manual or automatic configuration
up to 2 check gasses.
Two Gas Validation – allows the user to configure two
validation gas checks sequentially.
An example would be Oxygen analyzers used for Marine
Vapor Recovery applications whereby a single “validation”
command shall execute both a zero and span gas check.
Results for the two gas off-line validation are shown for both
gases along with their corresponding results