4–8
DAILY STARTUP AND OPERATION
WARNING
To prevent personal injury or equipment damage, the
operator should become familiar with the safety
warnings and information in Chapter 2 before operating
the Troxler NTO Asphalt Content Ignition Oven.
Troxler recommends the following method for burning samples. For
additional information, refer to the following ASTM or American
Association of State Highway and Transportation Officials
(AASHTO) standards:
♦ ASTM C 117 (AASHTO T11), Materials Finer Than 76-µm
(No. 200) Sieve in Mineral Aggregates by Washing
♦ ASTM C 136 (AASHTO T27), Sieve Analysis of Fine and
Coarse Aggregates
♦ ASTM D 979 (AASHTO T168), Sampling Bituminous
Pavement Mixtures
1. Power the oven on as follows:
f If the Auto-Timer is not enabled, close the chamber door
and position the circuit breaker/power switch (shown in
Figure 1–1) to the ON (up
) position.
The oven performs a
self-test, displays the default screen as shown on page 4–5,
then applies power to the IR element.
f
If the Auto-Timer is enabled and the chamber door is closed,
the oven will automatically apply power to the IR element
and exhaust fan at the designated start time. To set up the
Auto-Timer, see page 5–15.
Note that opening the cham
ber door prohibits the oven from
applying power to the IR element.
NOTE
To ensure consistent, repeatable results, Troxler
recommends allowing the oven chamber to reach 400 °C
(750 °F) for a 120 V ac (Model 4730) unit or 375 °C
(707 °F) for a 240 V ac (Model 4731) unit before burning
a sample.
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