YOKOGAWA TB820D, User Manual, Page: 71 / 87

<8. MAINTENANCE>
8-10
IM 12B01B30-02EN 2nd Edition : June 09 , 2021-00
8.8 Window glass replacement
For TB820D you can replace the window glass of the Flow cell. There are three window glasses
in the Flow cell (see Figures 8.2, 8.10).
Refer to Section 8.9 when replacing each Flow cell.
<Flow cell left side>
(Light source side)
<Flow cell front> <Flow cell right side>
Window glass position-a Window glass position-b Window glass position-c
with oscillator cable (-U1)
Figure 8.10 Window glass positions
Arrange the window glass and O-ring as below.
Table 8.6 Spare parts: Window glass, O-rings, gaskets
Part No. Name Description
K8003KS GLASS ASSY 1 window glass (large), 1 O-ring (for window glass position- a and c)
K8003KT GLASS ASSY 1 window glass (small), 1 O-ring (for window glass position- b)
K8003KV GLASS ASSY 1 window glass (large) with oscillator, 1 O-ring (for window glass
position-a, -U1)
K8003NQ Gasket 67 mm × 119 mm, for upper part of Flow cell
K8003NR Gasket 65 mm × 65 mm, for clear cover
K8003NU Gasket ASSY One gasket each (K8003NQ, K8003NR),
2 O-rings (large), 1 O-ring (small)
CAUTION
Be sure to turn off the power of the instrument before you start replacing the window glass.
n
Removal of Flow cell
(1) Sample drainage
Close the sample supply valve and open the drain valve behind the detector to drain the
sample.