Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 103)

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IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<8. VALIDATION AND CALIBRATION>
Moving the analyzer to the off-line calibration cell:
1 If the process gas is at a positive pressure, Isolate the analyzer from the process and shut-off the
window purge gas flow to prevent excessive pressure building up on the window.
2 If the process is at or near negative pressure then be aware that ambient air will be drawn in to
the process/stack when the analyzer is removed from its interface.
3 Remove the detect unit by loosening three of the Allen screws (5/32” Allen wrench). The three to
loosen by one turn are top left, top right and lower left. The screw located lower right is to be fully
removed.
4 Carefully twist the detect unit anti-clockwise until the Allen screw heads align with their openings,
then pull the detect unit away from the alignment flange using an slight twisting action – Take
care not to damage the O-Rings.
5 Carefully place the detect unit adjacent to the off-line calibration cell taking care not to contami-
nate the window.
6 Repeat same removal process for the Launch unit and place it VERY CAREFULLY adjacent to the
off line calibration cell.
7 Check to see that there are three Allen Head screws in the top left, top right and lower left
positions and that they are backed out to clear the analyzer quick connect. Attached the Detect
unit to one end of the off-line calibration cell – Carefully slide the unit over the O-Rings making
sure the O-Rings are not damaged/cut during mounting. Twist the analyzer in to the vertical
position. Hand tighten the three screws – do not fully tighten at this time.
8 Insert the Allen screw to the lower right position and tighten. Tighten all other Allen screws now
also
9 Repeat same mounting process for the Launch unit and handle it VERY CAREFULLY
10 With the appropriate user interface, observe the transmission (75-100%) level to ensure correct
mounting and alignment. Note, there is no means for alignment adjustment when mounted to the
calibration cell other than as noted below.
11 Connect all purge tubes as required (see below) and leak check accordingly – note that any haz-
ardous gases (CO, H2S, CH4, etc.) should be vented to safe area in accordance with any local
requirements.
Note, any leaks can cause erroneous results and can present hazardous situations!