Basic HTML Version
Appendix B
5/20/2009
26
17.3.4.5.5. Close the cover, and tighten equally on all four
screws. This should be performed in an
alternating sequence to achieve a uniform seal.
Never over-tighten or use any tools on the
screws.
17.3.4.5.6. Open and remove any spent capsules in the
capsule receiver. Re-grease the gasket and re-
install cover.
17.3.4.5.7. Close the purge valve, let pressure build up for
about 30 seconds. Re-open the purge valve for
about 5 seconds and then close again.
17.3.4.5.8. Select “OK” to continue operation.
17.3.4.6.The Sample Run
17.3.4.6.1. The sample is automatically injected into the
combustion tube at the appropriate time. Upon
completion of the fill time the ladle is retracted
and allowed to cool. At the end of the run the
results are printed and the soft key commands
are followed if any has been selected. The
screen returns to sample entry.
17.3.4.7.Run Display and Commands
Once the run begins, the screen displays the following
information:
17.3.4.7.1. Run number, Sample Weight and ID., the
operating K and B values, the preset combustion
and purge times, valve status, and the elapsed
time in minutes:seconds.
17.3.4.7.2. Temperatures and Pressure are also displayed
near the bottom of the screen. These numbers
may not be updated all of the time as time
critical sections of a run occur. Run counters
for the various tubes are displayed above the
valve status diagram. The run counters will
change from blue to red when they approach
10% within the thresholds set by the user.
17.3.4.7.3. During the run the analyst has various options
available through the buttons at the top of the
screen (accessed via simply selecting one). If a
key is actuated, the button changes from grey to
white. The buttons are for the following
functions:
a.
Ks & Bs
- To access the Ks and Bs
table at the end of the current run. This
allows the operator to change the
operating values.