<9. Inspection and Maintenance>
9-16
IM 11Y01D01-01EN
9.3.2
Preparation Procedure
Perform the following procedure. Purge pipe connection is different for offline validation, zero
calibration, and span calibration. For details, see sections 9.4, 9.5, and 9.6.
CAUTION
• Do not apply physical shock to the TDLS8000 when relocating the TDLS8000 to a
calibration cell and when returning it to the process. Doing so can cause a malfunction.
• During calibration work, do not remove the LU or SCU while the power is on.
• If the process gas is positive pressure, shut off the TDLS8000 from the process, stop the
process window purge, and prevent excessive pressure from being applied to the process
window.
(1) Recording the settings
Before removing the TDLS8000, check the following settings and the process conditions.
These will be used when returning the TDLS8000 to the process.
• Process optical path length
• Process pressure (record only when the input mode is set to Fixed)
• Process temperature (record only when the input mode is set to Fixed)
• Transmission
(2) Turning the TDLS8000 off
Turn the TDLS8000 off.
(3) Removing the TDLS8000 from the process
(a) Stopping the purge gas
Stop the nitrogen gas (or instrumental air) for process window purging and analyzer internal
purging.
Prevent pressure from being applied between the inside of the TDLS8000 and the ball valve or
between process windows (attached to alignment flanges or process isolation flanges) and the
ball valve.
(b) Shutting off the TDLS8000 side from the process side (using a ball valve)
Check that there is no residual internal pressure, and then shut off the TDLS8000 from the
process. (Close the process ball valve or the like.) If there is no component for shutting off the
TDLS8000 side from the process side, check that the process is completely stopped before
removing the TDLS8000. If there is no component for shutting off the TDLS8000 side from the
process side and the process is running, do not remove the TDLS8000 as the process gas may
blow out.
(c) Removing piping
Remove the pipes from the TDLS8000. (To make reinstallation easier after offline validation or
calibration, we recommend that you mark the pipes.)
Apply vinyl tape or other protector to the TDLS8000 ports and pipe ferrule areas.
3rd Edition: Jun. 10, 2016-00
Содержание TDLS8000
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