Manual Mode Zeroing; Cell Failure - Teledyne 3010TA Operating Instructions Manual

Oxygen Analyzer
Press Zero to enter the Zero function. The screen that appears allows
you to select between automatic or manual zero calibration. Use the
to toggle between
blinking, on the display.
Press Enter to begin the zero calibration. After a few seconds the first
of five zeroing screens appears. The number in the upper left hand corner is
the first-stage zero offset. The microprocessor samples the output at a prede-
termined rate. It calculates the differences between successive samplings and
displays the rate of change as
(ppm/s).
NOTE:It takes several seconds for the true
Wait about 10 seconds. Then, wait until
close to zero before pressing Enter to finish zeroing.
given in ppm/s.
Generally, you have a good zero when
for about 30 seconds. When
few seconds, the screen will update.
Once span settling completes, the information is stored in the
microprocessor, and the instrument automatically returns to the Analyze
mode.
Cell failure in the 3010TA is usually associated with inability to zero
the instrument down to a satisfactorily low ppm reading. When this occurs,
the 3010TA system alarm trips, and the LCD displays a failure message.
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
If there are no leaks and the span gas is OK, replace the cell as de-
scribed in Part II Analysis Units, chapter 5 Maintenance.
4.4.1.2

Manual Mode Zeroing

and
4.4.1.3

Cell Failure

leaking into the system.
Part I: Control Unit
zero settling. Stop when
a value in parts per million per second
value to display.
is less than 0.05 ppm/s
is close enough to zero, press Enter . In a
keys
appears,
is sufficiently
is
Part I: 4-13