Section 10
Model 601/601P/602/602P/603 NDIR Analyzer
California Analytical Model 600_NDIR_Series_v10.0 CE
Operators Manual
Page 62 of 86
10.4.
Removal of Pipe Cell
(Figure 10-1)
1)
Discontinue the sample gas flow. When it contains harmful gas, purge the
measuring cell sufficiently with zero gas.
2)
Turn the power switch to OFF.
3)
After loosening the retaining screws on the sides of the top cover, lift off top cover
and locate the pipe cell.
4)
Disconnect the sample gas inlet and outlet tubes from the measuring cell.
5)
After loosening (do not remove) the two screws (No. 1 in Figure 10-1) which are
used for securing the infrared light source unit (No. 5 in Figure 10-1) to the base
plate, shift the infrared light source away from the pipe cell (No. 12 in Figure 10-
1) to form a gap.
6)
After removing the pipe cell retainer screws (No. 7 in Figure 10-1), remove the
retaining clamps (No. 11 in Figure 10-1).
7)
Carefully remove the cell from the optical bench and remove both windows
(right-hand threaded) (No. 14 in Figure 5-1).
8)
At this time, inspect the O-Ring (No. 13 in Figure 10-1) for signs of deterioration.
Replace if necessary.
9) The
CaF
2
window is bonded to the window holder. Inspect and clean the
windows as necessary using cotton swabs and a suitable cleaning solution.
Alcohol or an alcohol-based glass cleaner is a suitable cleaning solution. A soft cloth
or tissue that will not deposit lint should be used to clean the liner & windows.
10) The pipe cells contain a reflective metal foil liner (not shown in Figure 10-1) to
enhance the light energy through put in the cell. Normally it is not necessary to
remove the liner for cleaning; however, the liner should be removed if the cell is
subjected to grossly excessive moisture. If necessary, clean both sides of the
liner and the inside of the pipe cell. If the liner has been subjected to a corrosive
substance, it should be replaced. In either case, ensure that the small gas holes
in the liner are aligned with the gas fittings at both ends of the pipe cell before
reassembling the windows.
11) The pipe cell can be re-assembled by following the reverse of the disassembly
procedures. In re-assembly, reserve gaps of approximately 0.5 mm between the
infrared light source unit and cell and between the cell and detector, respectively.
Larger gaps are undesirable.
Содержание 600-NDIR
Страница 1: ......
