ABL77 Service Manual
Chapter 6: Replacements
Valve Board,
Continued
Removing the
old valve board
Follow these steps to remove the old valve board with replaceable valves. Refer to
the figures on the following page to determine which valve board in the analyzer.
Step Action
1.
•
Select
Shutdown
from the
Main Menu
•
Select
Long-Term Storage
and perform this procedure.
NOTE: This procedure will remove all liquid from the internal
tubing and prevent fluid from contacting the electronics during
tubing removal. Failure to remove all fluid may result in damage to
the electronics.
2.
Disconnect the lower module according to the instructions in
Chapter 5
.
•
Disconnect the cables from the lower module
•
Disconnect the manifold tubing from the lower module
3.
Using scissors, carefully trim 3/8" to 1/2" (9.5 to 12.7 mm) off and
dispose of the disconnected ends of the manifold tubing. Make sure
the ends are neat and square.
NOTE:
The manifold tubing may be trimmed until the length makes
re-assembly of the analyzer difficult. If the tubing has been trimmed to
a length that makes re-assembly difficult, replace the manifold (REF:
924-297).
4.
To prevent crystallization and to avoid discrepancies of age among the
tubing elements, replace all tubing when the valve board is changed.
a) Disconnect and remove all existing tubing from the valves and
waste drain path.
b) Discard tubing appropriately.
5.
Disconnect the cables of the three valves from the in-use valve board
connectors: J7, J8, J9, J10 or the Y-cable.
6.
Disconnect the waste pump cable from J4 on the valve board or the
Y-cable.
7.
Disconnect the roller pump cable from J5 on the valve board.
8.
Disconnect the opto sensor cable from J6 on the valve board.
Continued on next page
Rev. F
6-11
Содержание ABL 77 Series
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Страница 333: ...ABL77 Service Manual Chapter 9 Spare Parts Modules and Externals Continued Module diagrams continued Rev F 9 3 ...
Страница 335: ...ABL77 Service Manual Chapter 9 Spare Parts Upper Module Components Continued Upper module component diagram Rev F 9 5 ...
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