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5-2
5 Maintenance & Troubleshooting Model 9700
TELEDYNE BROWN ENGINEERING
Analytical Instruments
Note: Do not over-order or stockpile Micro-Fuel Cells. Only one cell per
instrument should be kept in reserve.
When installing the oxygen cell in the probe housing, make certain
that the shorting clip is re- moved and that the cell membrane is facing up
(or outward). Do not install the oxygen cell upside down.
Caution: When replacing the oxygen cell, use care not to scratch the
membrane covering the gold-plated electrode. If the membrane
is ruptured or damaged in any way, the sensor must be re-
placed.
The oxygen cell contains a caustic liquid (potassium hydroxide solu-
tion). If the Teflon membrane is ruptured, the liquid in the cell can leak
out. The liquid has a characteristic slippery feel and if contact with the skin
or eyes occurs, wash with copious amounts of water and seek medical
attention, if required.
Note: Do not install an oxygen cell into a system that is in storage or in a
non-operating condition. The oxygen cell will commence the oxida-
tion process and eventually will become useless as a sensor. Also,
when the on-line system is shut down for a short time, every effort
should be made to adjust the controls in the system to prevent air
from coming into contact with the Micro-Fuel Cell.
5.1.3 Cell Warranty
The A-3 Micro-Fuel Cell carries a warranty that covers its normal life
expectancy. Cell warranty is for 6 months of continuous service in normal
flue gas applications.
Customers having warranty claims should return the cell in question
to the factory for evaluation. If it is determined that failure is due to faulty
material or workmanship, the cell will be replaced free of charge.
Note: Evidence of tampering or abuse will render the warranty null and
void. If the cell was working satisfactorily, but fails short of its
warranty period, the customer will receive credit, on a prorated
basis, towards the purchase of a replacement cell.