Teledyne 3010TAC - Split architecture trace oxygen analyzer (EU - CENELEC) - Manual (Page 77)

Oxygen Analyzer Part II: Analysis Unit
Part II: 4-1 Teledyne Analytical Instruments
Maintenance
4.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas connec-
tions, routine maintenance is limited to replacing Micro-Fuel cells and fuses,
and recalibration.
Self-diagnostic testing of the system and fuse replacement in the Con-
trol Unit are covered in Part I, chapter 5 of this manual. For recalibration, see
Part I, section 4.4 Calibration.
WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS
MANUAL.
4.2 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 3010T is usually characterized inability to zero the
instrument down to a satisfactorily low ppm reading. When this occurs, the
3010TAC system alarm trips, and the VFD displays a failure message.
#.# ppm Anlz
CELL FAIL/ ZERO HIGH
Before replacing the cell:
a. Check your span gas to make sure it is within specifications.
b. Check for leaks downstream from the cell, where oxygen may be
leaking into the system.
If there are no leaks and the span gas is OK, replace the cell.