YOKOGAWA TB820D, User Manual, Page: 73 / 87

<8. MAINTENANCE>
8-12
IM 12B01B30-02EN 2nd Edition : June 09 , 2021-00
(4) Removal of the oscillator cable (when the suffix code -U1 is selected)
Loosen the six (6) screws and open the front cover of the TB820D. Remove the oscillator
cable at the connector as shown in the figure. (See Figure 8.14)
Remove the oscillator cable
at the connector.
Figure 8.14 Removal of the oscillator cable
(5) Removal of Flow cell
First, remove the two nuts on the sample inlet and the sample drain at the bottom of the
Flow cell. Next, loosen the six (6) screws on the top of the Flow cell. In this state, pull up the
Flow cell and remove the Flow cell.
If Suffix code -U1 is selected, the oscillator and oscillator cable are attached to the Flow
cell. Be careful not to damage the oscillator cable when removing the Flow cell. (See Figure
8.15).
Nuts at the bottom of the Flow cell (2 positions)
Flow cell
fixing screws (6 positions)
Figure 8.15 Removal of Flow cell
n
Window glass replacement
There are three window glasses. (See Figure 8.10)
Loosen the four (4) screws (two for position-2), remove the window glass and O-ring, and replace
with a new one.
When the suffix code -U1 is specified, attach the window glass with the oscillator to the window
glass position-1. Install the window glass so that the oscillator cable does not interfere with the
optical path when it is pulled out in the direction shown in the figure (upper right in Figure. 8.10).
. CAUTION
• When removing the window glass, wipe off any water remaining on the window glass
mounting part with a dry cloth. If moisture remains in this area, condensation may form on
the window glass, which may affect the measurement.
• Do not allow fingerprints or other stains to adhere to the window glass. If it gets dirty, wipe it
off completely with the included silicone cloth. Fingerprints on the window glass may affect
the measurement.