14
Possible Solutions May Be:
1. Turn the analyzer off, and then back on again. Now proceed to
carefully calibrate the analyzer.
2. Check the complete sampling system for leaks, and be sure that
everything is tight.
3. Increase the flow rate and/or add downstream tubing in order to dilute
or minimize the introduction of oxygen from the room back into the
sensor.
4. Be sure that the measurement gas pressure is stable. Changes in the
operating pressure will cause measurement value variations. The cell
is designed to measure Oxygen at atmospheric pressure. There
should be nothing downstream that could restrict gas flow and increase
cell pressure.
Caution: The measurement cell could be destroyed if the
maximum pressure rating is exceeded.
If necessary, use a non-adjustable pressure reducer on the
measurement gas inlet.
5. If none of these steps correct the problem, than replace the sensor.
6.4 CELL REPLACEMENT
The sensor used in this analyzer uses electrolytes which contain toxic
substances, mainly lead and potassium hydroxide. These 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 physician. (A Material Safety
Data Sheet is available from the Factory.)
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 may require an excessively long time to
reach zero after installation, possibly as long as one to two weeks!
6.4.1 WHEN TO REPLACE A CELL
The ageing characteristic of the Oxygen measurement cell shows an almost
constant output throughout its useful life. Near the end of its life it falls off
sharply, reaching zero output at the end.
