Troxler NTO 4730, Руководство по эксплуатации и инструкции

Страница: 62 / 158

5–8
CUTOFF LIMIT AS A PERCENTAGE.
To enter the cutoff limit
as a percentage of the initial sample mass, press
〈
2
〉
at the Cutoff
Units menu shown on page 5–7. The oven displays:
Current Cutoff Limit
X.XXX %
do you want to
change Cutoff Limit?
f
To exit without changing the cutoff limit, press
〈
NO
〉
. The oven
returns to the
Burn Parameter Menu
.
f
To change the cutoff limit, press
〈
YES
〉
. The oven displays:
Enter Cutoff Limit
from 0.001% - 1.000%
in 0.001% steps
then press ENTER
Use the numeric and decimal keys to enter a cutoff limit from
0.001% to 1.000% in increments of 0.001%. Use the numeric
keys to set the burn time. After entering the cutoff limit, press
〈
ENTER
〉
. The oven returns to the Burn Parameter Menu .
Calculation Type
The oven provides two methods for calculating
%Loss : the bitumen-
to-sample method and the bitumen-to-aggregate method. Both
methods measure the difference in the sample weights before and
after the burn. However, the
bitumen-to-sample method expresses
the difference as a percentage of the starting mass while the
bitumen-to-aggregate method expresses the difference as a
percentage of the final (aggregate) mass .