Cleaning Measurement Cell - Fuji Electric ZSVS-2 Instruction Manual

5.3.8 Cleaning measurement cell

Entry of dust or water drops into the measurement cell may cause internal contamination, which may
result in drifting.
Be sure to clean the measurement cell if contamination is found.
At the same time, check the filter in particular, to prevent the entry of dust or mist into the cell.
Two types of cells are available for measurement, namely, the block cell (length: 4mm, 8mm, 16mm,
32mm) and the pipe cell (length: 64mm, 125mm, 250mm).
There may be a case where both cells of the two-component analyzer may be included in the optical
system. In this case, remove the pipe cell, and then the block cell. (See Fig. 5-1.)
(1) Cleaning the pipe cell (See Fig. 5-1.)
1) Stop feeding the gas for measurement. If toxic gas is contained, purge the measurement cell fully
with zero gas.
2) Turn off the power switch.
3) Remove the pipe connected to the measurement cell.
4) Loose the screw (No.1 in Fig. 5-1) that fastens the infrared ray light source unit (No.5 in Fig. 5-1) to
create a gap between the unit and the pipe cell (No.12 in Fig. 5-1).
5) Remove the screw (No.7 in Fig. 5-1) of the cell presser (No.11 in Fig. 5-1) fastening the pipe cell.
6) Remove the cell, and then remove the windows on both sides (No.14 in Fig. 5-1). The screw of the
window is right-handed.
Note: The reflection board within the cell is attached to the cell and cannot be removed.
7) When cleaning the internal surface of the cell and the infrared ray penetration window, remove
large dust using a soft brush first, and then carefully wipe them with soft cloth.
Never use hard cloth.
CAUTION
The window can be broken easily.
Handle it with care, and be careful not to wipe it strongly.
8) If severe contamination is found on the window or within the cell, paste absolute ethanol on soft
cloth, and wipe off the contamination with it.
9) If the window is found to have corroded, attach chrome oxide powder to soft cloth, and wipe the
window with it if the corrosion is not so severe. If corrosion has progressed significantly, replace
the window.
10) Reverse the procedure in 3) to 6) to assemble the cell. Allow a gap of 0.5mm between the infrared
ray light source unit and the cell, and the cell and the detector when assembling the unit.
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INZ-TN2ZSVS-E