Teledyne 3290 - OEM percent oxygen analyzer - Manual (Page 43)

Percent Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 33
4. Insert the cell block electrical connector plug into the socket in
the sensor is such a way that that the sensing membrane is facing
down to facilitate water evaporation away from the sensing
membrane and that any bubbles that form will migrate away
from the sensing cathode due to gravity effects.
5. Reconnect power to the instrument.
To install a new C-5 or C-5F sensor:
1. Disconnect power to the analyzer.
2. 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.
3. 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. The sensing
membrane should face downward to facilitate water evaporation
away from the sensing membrane and any bubbles that form will
migrate away from the sensing cathode due to gravity effects.
4. Screw the cap back into place. Apply as much pressure as you
can with your fingers, but use no tools. Then insert the probe
with the new cell into the manifold cavity.
5. Reconnect power to the instrument.
5.2.5 Cell Warranty Conditions
The E-2 oxygen sensor is the typical cell used in the Model 3290.
This cell is a long life cell and is warranted for 2 years (under specified
operating conditions—see Appendix) from the date of shipment. Note
any Addenda attached to the front of this manual for special information
applying to your instrument. Some instruments are shipped with a C-5
or C-5F cell. These sensors are used in applications requiring extended
cell lifetime in air or long lifetime in the presence of CO
2
. These cells
carry a 6 months warranty.
With regard to spare cells, warranty period begins on the date of
shipment. The customer should stock only one spare cell per instrument
at a time. Do not attempt to stockpile spare cells.