ADR-Auto Range
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9901X0215 Issue 5
Note than even when the automatic tare option is turned on, the manual tare function
is still operational.
4.7.5 Pacing
Control
The ADR-Auto has three ways of controlling pace, Automatic, Manual and Board.
(The correct one of these must have been selected when setting the options in the
Setup Mode
screen). The selected option comes into effect once the ADR-Auto has
closed the gap between the sample and the upper platen, and has detected an
increase in load on the sample.
4.7.5.1 Automatic
Once the ADR-Auto detects that the sample is being loaded, it turns on the pace
control system. At the start of the loading cycle, the pace error bar will show an error
but this will soon stabilise as the automatic pacer takes over.
4.7.5.2 Manual
Once the ADR-Auto detects the sample is being loaded, the pace rate must be
controlled manually. This can be done from the keyboard using the
Left
and
Right
Arrow
keys. One press of either key increases or decreases the rate at which the
load is being applied.
4.7.5.3 Board
Once the ADR-Auto detects a load on the sample, it applies loads as fast as possible
to compress the board on either side of the sample. This continues until the average
pace rate measured over the previous 1 second is 90% of the set rate. The pace
control system is then turned on.
4.7.6 Pace Error Bar Display
When the ADR-Auto is loading the sample, the error display takes the form of a bar
running from the central line to either the plus or minus signs. The length and
direction of the bar is proportional to the pace error and a full scale deflection is equal
to a ± 15% error in the pace rate.
4.7.7 Altering the Pace Rate whilst the Test is Running
The pace rate (or pace rates and transition load if dual rates have been selected) can
be changed at any time while the sample is being loaded. Press the
Pace
key and
enter the new values. The new values take effect when the
Escape
key is pressed to
return to the test screen. Note that the pace bar display will show an error until the
ADR-Auto is pacing at the new rate.
4.7.8 Pausing the Test
If the ADR-Auto is controlling the pace rate (in Automatic or Board pace control
modes) the test can be paused at any time by pressing the
Pause
key and the ADR-
Auto will hold the load constant. Press the
Run
key to resume loading at the set
pace rate.
4.7.9 Overload
Conditions
If the load reaches the frame limit before the sample fails, the message “Warning –
Overload” will flash on and off on the screen, and the ADR-Auto will release the load.
Press the
Reset
key to return to the
Initial Screen
. Under these conditions sample
data record is not recorded or printed.
