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Portable Trace Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 43
in such a way as to obviate any possibility of incurring damage. Under
no circumstances should you disturb the integrity of the cell
package until the cell is to be actually used. If the cell package is
punctured and air permitted to enter, the cell will immediately start to
react to the presence of oxygen.
CAUTION: THE MICRO-FUEL CELL CONTAINS KOH SOLUTION,
WHICH IS CAUSTIC. SHOULD THE CELL RUPTURE,
A LEAK MAY CAUSE INJURY. PLEASE REFER TO
MATERIAL SAFETY DATA SHEET IN THE APPENDIX
TO LEARN ABOUT POTENTIAL HAZARDS AND
CORRECTIVE ACTION IN CASE OF ACCIDENT.
No tools are required to replace the cell in the instrument. Simply
unscrew (counterclockwise) the plug at the bottom of the analyzer and
the cell will drop out of the manifold cavity.
Remove the new cell from its package, and carefully remove the
shorting clip. Do not touch the silver-colored sensing surface of the cell,
as it is covered with a delicate Teflon membrane that can be ruptured in
handling.
Place the cell on the end of the cell holder cap so that the sensing
surface of the cell is in contact with the cap and the electrical contact
plate end of the cell is facing upwards. Insert the cell and cap in the
manifold cavity, and screw the cap back into place. Apply as much
pressure as you can with your fingers, but use no tools.
After the cell has been installed, purge the instrument with an inert
gas (or the sample), and then proceed as directed in section 3.1.1.
4.6 Cell Warranty
The Class B-2C, A-2C, B-2CXL and Insta Trace micro-fuel cells
used in the Model 3110 are warranted for six (6) months of service.
With regard to spare cells, service time starts when the cell is
removed from its oxygen barrier packaging. The customer should stock
only one spare cell per instrument at a time. Do not attempt to stockpile
spare cells.
If the Model 3110 is used in trace analysis applications where CO
2
is a major component in the sample, the A2C micro-fuel cell should be
used. At low CO
2
concentrations (1,000 PPM or less) the standard B2C