Thermo Scientific Thermolyne NCAT F85930, Инструкция по установке и эксплуатации

Страница: 48 / 94

11
Software Features
Equations Used to Determine Bitumen Ratio
46 NCAT Asphalt Content Tester Thermo Scientific
Equations Used to Determine Bitumen Ratio
The Bitumen Ratio has been added to the Rev. G software. This test result is used in the United States,
Canada and Europe. The Bitumen Ratio equation is detailed as follows:
Bitumen Ratio = (Weight Loss/Sample Weight after ignition) x 100 minus temperature compensation,
minus correction factor.
The Bitumen Ratio test results are printed in the header above the calibrated asphalt content for each
test.
Calibrated Asphalt = (Weight Loss/Sample Weight Content) x 100 minus temperature compensation,
minus correction factor.
If you use Bitumen Ratio for your end results, you must use this factor during your
mix calibration procedure. Ignore the calibrated asphalt content number.
Test Interrupt/Power Interrupt
If the power to the furnace is interrupted during an ignition test, and then restored—the furnace will
continue the test but will print the following information on the ticket.
{Results Invalid}
Test Interrupted
Time: XX:XX:XX
The elapsed time will restart at 1 and continue to count up. The software will continue to monitor the
weight loss and recognize the endpoint to end the test.
This feature will prevent smoke from entering the lab should a power interrupt occur. Once power has
been restored the blower will start up again to maintain air flow through the chamber. This will also
prevent the user from prematurely opening the door.
The power interrupt feature also applies to the programmable timer. Should the power go off during
the night while the unit is asleep and then come back on prior to the programmed “wake-up” time, the
software will recognize the present time and “wake-up” at the correct programmed time.
Auto Shutdown Mode
The software can be toggled between Auto Mode and Manual Mode by performing a Hidden Temp
Key Routine. In the Auto Mode, the unit will recognize the endpoint, stop the blower, print the results
and then BEEP once every 60 seconds until the operator presses the START/STOP key. This will
unlock the door and disable the beep.
In the Manual Mode the unit will recognize the endpoint and place an asterisk by the endpoint. It will
continue to run the test and beep until the operator presses the START/STOP button.