Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 120)

8-20
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<8. VALIDATION AND CALIBRATION>
Wait for the reading to stabilize.
Many processes are dynamic but judge for yourself when
you believe the check gas has fully purged the integral check
gas flow cell – typically at least one minute depending on the
location of the switching valve.
Press ENT to proceed.
Re-apply the original purge gas (typically Nitrogen) and again
wait for the reading to stabilize (as the check gas is being
purged from the check gas flow cell).
Press ENT to proceed.
Observe the on-screen results. If there is some doubt about the
result, the Validation may be performed again as many times as
required.