Teledyne 9700 - Flue gas analysis system - Manual (Page 30)

4-2
4 Operation Model 9700
TELEDYNE BROWN ENGINEERING
Analytical Instruments
The Micro-Fuel Cell is supplied separately in a controlled atmosphere
package and must be installed prior to startup. To install the cell, use the
following procedure:
Note: Do not open the sealed package until the system is to be started
and a flue gas sample is available .
(1) Make sure that the RANGE switch is in the OFF position
(power “off”).
(2) Locate the cell holder assembly (white unit on the back plate
assembly) and withdraw the cell probe from its holder, using a
twisting motion. Remove the cap by unscrewing counterclock-
wise (CCW).
(3) Open the cell package and remove the shorting clip .
(4) Place the Micro-Fuel Cell in the probe with the gold colored
sensing surface facing toward the outside, and the printed
circuit contact end facing the contacts inside the probe body.
Replace cap previously removed (refer to instructions in the cell
box).
(5) Insert the cell probe back into the probe holder bv pushing it in
with a slight twist until the the probe strikes bottom.
4.1.4 Initial Calibration and Equilibration
Before stable, reliable operation can be achieved, the Micro-Fuel Cell
requires a period of time to adjust to its new environment. When observing
the integral meter, this period of time will appear to be about 15 minutes.
In actuality, however, true stability is not achieved for many hours, which
can be demonstrated by recording the output on a circular chart recorder,
then analyzing the results of the first 24 hours of operation. The user will
note a few percentage points of drift covering a period of hours after the
initial first 15 minutes of equilibration.
If speed is of the essence, TBE/AI suggests that the instrument be
placed in service atter it appears to have stabilized (usually about 15
minutes), and the slight instability of the ensuing hours tolerated. Any error
incurred during this period will be eliminated during the first operational
calibration.