Carbolite ABA 7/35B - Manual (Page 44)

44 MF60 – 1.04
14.4 End Triggers
The functions of the Min % Weight Change, Constant Mass Limit and Constant Weight Time
are described in section 7.6 - End of Test Trigger.
14.5 Initial Delay Time
The Initial Delay Time parameter is the time period, in minutes, from the start of the test to the
point where the End of Test conditions are monitored. This prevents a false End of Test
condition from being detected at the start of the test. When testing an aggregate to determine
an aggregate only calibration factor the weight change may be so small that the trigger would
cut in prematurely. The Initial Delay Time should be set to an extended time, say 40 minutes.
14.6 Temperature Set Point
The temperature set point is the target temperature for the Main Chamber.
14.7 Print Format
The Print Format settings are described in section 12 - Printer Settings.
14.8 Calibration Format
(Applicable only to standard recipes)
This setting, Asphalt or Aggregate selects which calculation is used to determine the binder
content.
The Asphalt setting uses the British Standard calculation:
Binder % = Total Weight Loss % - Calibration Factor
The Aggregate option uses the following ASTM equation:
Binder % = ((M1
– M2) / M1 x 100) – Calibration Factor
Where:
M1 = total mass of sample prior to ignition
M2 = total mass of aggregate remaining after ignition
14.9 Calibration Factor
(Applicable only to standard recipes)
This value is obtained by running a calibration recipe with a known sample.
14.10 Binder Content
(Applicable only to calibration recipes)
This is the percentage binder content of a known sample. This is zero for an aggregate only
test.