Galvanic Applied Sciences 943-TGX, Operation Manual

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Revision 4 85 August 02, 2019
g) Inspect the measurement cell body. Clean with isopropyl alcohol, using a nonabrasive lint
free tissue such as KimWipes® or a cotton swab. Thoroughly rinse the cleaned surface
with pharmaceutical grade distilled water and dry completely before reassembly.
h) Hold the measurement cell vertically and install the new bottom O-Ring in the top window
recess, ensuring that it is centered and sitting in the O-Ring seat.
i) Insert the cell window. Ensure that there are no finger prints as these will interfere with
the accuracy of the analysis.
j) Place the top O-ring onto the window and replace the cell end cap. The O-Ring will self-
align as the end cap is tightened. Tighten the end cap to hand-tight only.
k) Repeat steps h) through j) to install the O-rings and window for the other window. Look
through the cell and verify that there is an unobstructed light path. It may be necessary to
remove one or both of the SMA connectors to check the light path. Replace the
connectors to hand-tight when done.
l) When both windows are installed, the measurement cell assembly is ready for
reinstallation as described in Section 7.8.
7.8 Measurement Cell Installation
Refer to the Flow Diagram, the Sample System Components and the Measurement Cell
Assembly drawings while performing these steps.
The
measurement cell
is to be removed by trained and authorized
personnel only. The oven compartment and all of its components are HOT
(150 o
C). Wear appropriate personal protective equipment (gloves, eye wear,
clothing etc) if working with hot surfaces or wait until surface have cooled
to safe temperatures before performing maintenance tasks.
Procedure:
a) Place the measurement cell in its approximate position focusing on the engagement of
the Swagelok
®
fitting connections. Tighten the Swagelok
®
fitting nuts to finger tight.
b) With your fingers wrapped around the side of the cell block, work the heater bracket plate
into place. Install one (1) of the four (4) ¼-20 x 2" heater bracket screws with a 3/16" ball
driver. A small screwdriver or awl may be used to align the tapped holes in the bracket
with the screw holes in the measurement cell.
c) Install the remaining screws and tighten.
d) Tighten all of the Swagelok
®
fitting connections that were opened during the
measurement cell removal.
e) Open the
Zero Air Flow Control
valve to about ½ of a turn. This will pressurize the
measurement cell and related plumbing to about 20 psig. (Keep the isolation valves
closed.)