Yokogawa Extractive Oxygen Gas Analyzer TDLS220 - Manual (Page 62)

<7 ROUTINE MAINTENANCE> 7-9
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
• Once the window has been thoroughly cleaned, it should be re-installed using a reverse procedure
as above.
- CAUTION! – Ensure the window is installed in the correct orientation with the
stainless steel ring clamping the window onto the o-ring. Note the window holder
holes a distinct hole pattern and can only fit in one rotational position on the cell.
• Carefully install the window onto the cell and rotate such that the holes align with the threads, hand
tighten the fasteners with lock washers in position with 7/64” Allen key...
• Using the 7/64” Allen key wrench, carefully hand tighten each screw using a diagonal pattern and
gradually increase each screw incrementally – do not fully tighten one screw at a time, tighten them
down evenly and incrementally to a maximum of 18 lb/in torque.
• When the window is fully fastened, check the transmission level to see if normal levels have been
restored and if the measurements now appear normal. If so, replace the enclosure cover and allow
30 minutes for temperature stabilization.
- CAUTION! – Do not pinch wires between cover and enclosure
- CAUTION! – Do not cross-thread the Phillips head screws into the cover
• Check the Zero and Span with appropriate gases.
• If there is no change in transmission and/or the results are still noisy/unexpected then contact
Yokogawa for further assistance.