Teledyne 3020T - Manual (Page 59)

Trace Oxygen Analyzer Maintenance 5
5-3
Teledyne Analytical Instruments
5.3.1 Storing and Handling Replacement Cells
To have a replacement cell available when it is needed, it is recom-
mended that one spare cell be purchased 9-10 months after commissioning
the 3020T, or shortly before the end of the cell's one year warranty period.
CAUTION: Do not stockpile cells. The warranty period starts on
the day of shipment.
The spare cell should be carefully stored in an area that is not subject to
large variations in ambient temperature (75 °F nominal) or to rough handling.
WARNING: THE SENSOR USED IN THE MODEL 3020T TRACE
OXYGEN ANALYZER USES ELECTROLYTES
WHICH CONTAIN TOXIC SUBSTANCES, MAINLY
LEAD AND POTASSIUM HYDROXIDE, THAT CAN
BE HARMFUL IF TOUCHED, SWALLOWED, OR
INHALED. AVOID CONTACT WITH ANY FLUID OR
POWDER IN OR AROUND THE UNIT. WHAT MAY
APPEAR TO BE PLAIN WATER COULD CONTAIN
ONE OF THESE TOXIC SUBSTANCES. IN CASE OF
EYE CONTACT, IMMEDIATELY FLUSH EYES WITH
WATER FOR AT LEAST 15 MINUTES. CALL PHYSI-
CIAN. (SEE APPENDIX, MATERIAL SAFETY DATA
SHEET.)
CAUTION: Do not disturb the integrity of the cell package until
the cell is to actually be used. If the cell package is
punctured and air is permitted to enter, the cell will
require an excessively long time to reach zero after
installation (1-2 weeks!).
5.3.2 When to Replace a Cell
The characteristics of the Micro-Fuel Cell show an almost constant
output throughout its useful life and then fall off sharply towards zero at the
end. Cell failure in the 3020T is usually characterized inability to zero the
instrument down to a satisfactorily low ppm reading. When this occurs, the
3020T system alarm trips, and the screen displays a failure message.
#.# ppm Anlz
CELL FAIL/ ZERO HIGH