Yokogawa Extractive Oxygen Gas Analyzer TDLS220 - Manual (Page 66)

<7 ROUTINE MAINTENANCE> 7-13
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
AUTOMATIC OFFLINE VALIDATION SETTINGS
Please see below for detailed explanations of
Validation Settings.
There are several critical parameters that must be preconfigured in the TDLS220 software when using
the automatic validation sequence. These parameters MUST be correctly set otherwise the analyzer will
report false/incorrect validation results.
• Check Gas Concentration specifies the concentration (ppm or %) of the gas
within the offline flow cell.
• Check Gas Pathlength specifies the optical path length of the offline flow cell.
This is typically preset to 40” (or metric equivalent)
• Check Gas Temperature can be selected for either Fixed or Active.
o If Active Temperature, then follow on screen instructions.
o If Fixed Temperature, then enter in the temperature of the gas within the
offline flow cell. Remember that this value will be used whenever the auto
validate is used so try to select a value that is representative of when the
auto validate might take place (day/night, etc.) Press ENT to proceed.
• Check Gas Pressure specifies the pressure at which the gas within the offline
line flow cell.
• Valve Selection specifies which analyzer’s solenoid valve driver is used for the
check gas.
• Check Gas Purge Time specifies how long the check gas will purge the flow
cell.
• N2 Purge Time specifies how long N2 will purge the flow cell.
• Analog Output Mode specifies Block, Track, or Hold of all 4 to 20 mA output
during offline check.