Navigator 500
Sodium analyzer
8 Maintenance
OI/ASO550–EN Rev. G
65
8.6 Replacing plastic tubing – multi-stream wet-sections
It is recommended that all plastic tubing is replaced every 12 months. Use only the correct size and type of tubing – refer to Fig. 8.5
and Fig. 8.6 (page 66) for tubing location and Table 8.1, page 66 for tubing lengths.
Two sections of tubing are critical:
tubing (item
A
) between the reagent container and entrainment ‘T’ piece – this must be a polyethylene-lined tube with good
chemical resistance to the reagent.
tubing (item
J
) between the constant-head unit and the entrainment ‘T’ piece – cut 100 mm (4 in.) of the 1 mm ID silicon
rubber tube and fit onto the tube connectors. The tube should be taut to prevent interference with the flow and self-starting
characteristics.
Note.
Tubes
B
,
C
and
D
use QD couplings at the solution bottles, all other tubing connections are to barbed connectors.
*For inlet tube routing on wet-sections
with flowmeters
, refer to item Fig. 8.6, page 66, item
M
.
Fig. 8.5 Physical arrangement, all plastic tubing – sodium multi-stream wet-section
without
flowmeters
*
Key to tubing
Multi-stream configuration –
wet-sections
without
regeneration option.
Multi-stream configuration –
wet-sections
with
regeneration option
Entrainment T-piece and
constant-head unit moved forward
for clarity only. Refer to Fig. 2.1,
page 6 for locations within cubicle.
To flowcell