Troxler NTO
1–5
1. INTR
OD
UCTI
O
N
FEATURES OF THE TROXLER NTO
The oven incorporates a number of features that provide
unparalleled efficiency, safety, usability, and flexibility.
The oven heats the HMA sample using an
infrared (IR) element
.
The use of IR radiation serves two purposes: it limits the heating of
the aggregate material in the HMA sample while producing a very
efficient and clean burn process.
The oven can be powered from a 120 V ac, 50/60 Hz, 12 A source
(Model 4730) or from a 208–240 V ac, 50/60 Hz, 12/13 A source
(Model 4731). The oven is therefore convenient for use in
construction trailers, where power sources may be limited.
The
oven door lock
helps ensure operator safety. The oven monitors
the state of the door, and will not apply electrical power to the IR
element if the door is open. The oven door is locked automatically
at the start of a burn cycle. The door remains locked until five
minutes have elapsed since the chamber temperature has peaked or
since the
〈
ABORT
〉
key was pressed.
The
sample basket assembly
is designed to provide operator safety
while handling HMA samples, and to ensure an even burn of the
asphalt binder. A
basket carrier
is provided for lifting the baskets in
and out of the oven. A
sample safety cage
shields the hot sample
basket assembly while the asphalt sample cools.
The
integrated scale
continuously monitors the sample mass loss
during a burn cycle.
The oven features an
Auto-Tare
function that automatically tares
(zeroes) the integrated scale when no mass is present. The oven
software also enables the operator to tare the scale manually, to
calibrate the scale, and to verify the scale calibration.
The oven
keypad
and
internal logic
provide control, data storage,
and output flexibility. The keypad enables the operator to set up and
operate the oven, to store sample data, to calibrate and verify the
integrated scale, and to enter correction factors.
The oven includes an
Auto-Timer
function that can preheat the oven
automatically based upon start and stop dates and times entered by
the operator.
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...
