1–6
The oven features two audible indicators, an internally mounted
beeper
and a louder
annunciator
mounted on the rear panel. The
beeper emits a short beep in response to a valid keystroke on the
oven keypad. It sounds a longer beep when the operator presses an
invalid key or the oven displays an error message. The annunciator
sounds when the door is unlocked at the completion of a burn cycle.
The red
BURN COMPLETE
indicator on the front panel also
lights when the door is unlocked.
The
internal printer
enables the operator to print sample data and
system status information, either automatically or manually.
Two ports, a
serial communications port
and an
auxiliary port
, are
mounted on the rear panel of the oven. The serial communications
port, the leftmost of the two ports (as viewed from the rear of the
oven), is used to output data to a serial device, such as a computer
or printer. The auxiliary (right) port is intended for factory use only.
The oven stores up to twenty user-defined
aggregate correction
factors
(
ACFs
), which are percentage values used to adjust the
measured asphalt content for specific aggregates.
During a burn cycle, the oven displays measurement units of
percent loss
(
%Loss
). The
%Loss
measurement is the difference
between the sample weights before and after the burn cycle,
expressed as a percentage of the starting mass.
The oven offers two
burn modes
. The burn time can be set manually
by the operator (
Program Time
mode), or it can be adjusted
automatically by the oven (
Auto-Control
mode). In
Auto-Control
mode, the oven limits the burn time according to the
cutoff limit
specified by the operator. The cutoff limit can be defined in grams
or as a percentage.
The oven features three burn
profiles
, which define the operation of
the oven during a burn cycle. The
Default
profile should be used for
most materials; the two optional profiles can be used to optimize the
burn cycle for less standard mixtures.
The oven can store data for up to 200 HMA samples. Sample data is
stored in
project
files created by the operator. Up to twenty project
files can be defined. Sample data is stored in the active project file,
either manually using identification numbers entered by the
operator, or automatically using the
Auto-Store
function.
Summary of Contents for NTO 4730
Page 10: ...x LIST OF TABLES Table Title Page 4 1 Oven Keys 4 3 5 1 Recommended Minimum Burn Times 5 6...
Page 30: ...2 10 NOTES...
Page 90: ...5 36 NOTES...
Page 110: ...6 20 NOTES...
Page 136: ...Appendix A 16 NOTES...
Page 148: ...Appendix C 6 NOTES...
Page 156: ...Index 8 NOTES...
