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Appendix B
5/20/2009
22
17.1.2.
Standby Mode - To reduce helium consumption and minimize wear
on the terminal screen, the overnight or short term standby mode is
used.
17.1.2.1. Select the overnight standby mode (in the Run pull-
down menu).
17.1.1.1. Return to normal operation.
17.1.1.1.1. Select Stop Overnight Standby in the Run pull-
down menu
17.1.2.
Powering Down - It is preferable for the system to remain powered
up at all times since this will extend the life time of the glassware,
reagents, and electronics. However, helium and power will be
consumed during this standby and it might be necessary to power down
the 440 instrument. To assure minimum disruption for a future start up
after a power down, proceed as follows:
17.1.2.1. Turn the furnace temperature controllers to zero.
17.1.2.2.Allow several hours for the furnace temperatures to drop
below 100°C.
17.1.2.3.Turn off the power to the instrument as well as gas valves
between the instrument and the regulators.
17.1.2.4.Turn off the gas on the cylinder.
17.2.
440 Software Summary
17.2.1.
Run Pull-Down Menu
17.2.1.1.Carbon, Hydrogen, Nitrogen Run
17.2.1.2.Oxygen
17.2.1.3.Sulfur
17.2.1.4.Overnight Standby (save carrier gas)
17.2.1.5.Change Blanks and Ks
17.2.1.6.Balance Interface Weight Entry
17.2.2.
Service Pull-Down Menu
17.2.2.1.Datalog Signals
17.2.2.2.Leak Test
17.2.2.3.Profiles
17.2.2.4.Tube Replacement (Includes packing and installing)
17.2.2.5.Valve Rebuild
17.2.2.6.Maintenance Schedule
17.2.2.7.Maintenance Log
17.2.2.8.Bridges
17.2.2.9.Test Injector Drive
17.2.2.10.
Calibrate CEC-490
17.2.2.11.
Diagnostics
17.2.2.12.
Balance Interface Test
17.2.3.
Calculate Pull-Down Menu (Manipulating existing data)
17.2.3.1.Recalculate data and statistics
17.2.3.2.BTU/lb.
17.2.3.3.Dry, Dry Ash Free