ADR-Auto Range
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9901X0215 Issue 5
4.7.10 Ram Runout Conditions
If the
Run
key is pressed, and no sample is present in the frame, the ram will
continue to rise until the ram runout switch is tripped. This will cause the pump to
stop and the dump valve to operate. Press the
Stop
and then the
Reset
keys to
return to the
Initial Screen
.
4.7.11 Stopping the Test Manually
The test can be stopped at any time by pressing the
Stop
key. The ADR-Auto treats
this as a normal sample failure as described in 4.7.12.
4.7.12 Sample Failure
While the sample is being loaded, the ADR-Auto is continually comparing the current
load on the sample with the peak load seen by the sample. When the current load is
below the peak load by the percentage set when setting up the ADR-Auto (the default
setting is 15%), the machine senses this as a failure, switches off the pump and
dumps the load. The screen will then switch to show the sample failure details and
will be of the form –
Note that the stress value is not calculated for all sample types. See Appendix 3 for
the stress calculations performed by the ADR-Auto.
To prepare the ADR-Auto for the next sample, press the
Reset
key to return to the
Initial Screen
. At this point, if the options have been configured, the ADR-Auto will
print out the test results and record the results in the memory. Note that if necessary
the sample details can be updated before the
Reset
key is pressed by pressing the
Sample
key and editing the details as required. The stress and density values will
reflect any changes made to the sample’s dimensions or air and water weights.
4.7.13 Printing the Test Results (see section 4.11 for the printer configuration)
The test results can be printed during the
Sample Failure Details
screen display by
pressing the
key. If the printer is not connected or does not respond, the ADR-
auto will display the message –
Printer Busy. Retry? – No
on the bottom line of the screen. Use the
Left
or
Right Arrow
keys to select
Yes
or
No
and press the
Enter
key. The format of the printout will depend on the sample
type selected. See Appendix 4 for printout formats.
4.8
ACV and TFV Tests
The way the ADR-Auto controls the loading of the sample is different when the
sample has been chosen for an Aggregate Crushing or Ten Percent Fines Value test.
Provided that the automatic form of pace control has been selected, the machine will
control the loading of the sample at the entered pace rate until the load specified in
the
Failure Threshold
parameter is reached, at which point the load is dumped, and
the peak load displayed.
_________
Sample Failure Results
_________
Maximum Load 1045
Stress 134.4
Pace Rate 6.80
Density 350
