Teledyne 2120 - Trace Nitrogen in Argon Analyzer - Manual (Page 56)

Maintenance Model 2120
To remove the cell from the cell holder:
1. The cell holder has two side plates that hold the cell in place.
To loosen the grip of these side plates, remove the four bolts
that hold together the plates: two bolts toward the top of the cell
assembly (E) and two toward the bottom (F). The bottom bolts
go through the mounting bracket as well. DO NOT REMOVE
THE SCREWS ON TOP OF THE CELL HOLDER. THEY
HOLD THE OPTICAL SENSOR BOARD ON TOP OF THE
CELL IN PLACE.
2. Open the cell holder assembly from the bottom, letting the top
of the assembly (where the optical sensor board and high
voltage sticker are placed) act as a hinge. Carefully remove the
cell from the cell holder.
To install a new cell:
1. To begin installation of a new cell, first disassemble the cell
holder as described above.
2. Slide new cell into the opened cell holder assembly. Re-install
the four bolts that hold together the sides of the cell holder. The
bottom two bolts must hold the mounting bracket to the cell
holder.
3. Securely re-attach high the voltage transformer leads to the
electrode connections.
4. Carefully lower the cell assembly into the mounting plate in the
bottom of the analyzer, placing it over the bolts that fit into the
cell's bracket. Using four nuts and washers, attach the cell
assembly to the mounting plate.
5. Carefully install the inlet and outlet fittings on the cell inlet and
outlet glass tube stubs.
5.4.6 Photomultiplier Tube
Note: DO NOT handle the PMT glass surface with bare hands.
Skin oil can create high-voltage leakage paths and affect
the optical characteristics.
DO NOT handle the optical filter with bare hands. Skin oil
affects the filters optical characteristics.
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Teledyne Analytical Instruments