Instron 300DX, Руководство по эксплуатации

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Chapter 3: Operation
30 M47-17027-EN
Adjustable crosshead
control switch HPS control
box Adjust the position of the adjustable crosshead either before or after a
test. This changes the height of both the tension test opening and the
compression test opening. Do not apply a load to the specimen using this
switch. If this control will not function, be sure the
Emergency Stop
button is released. Move the adjustable crosshead as follows:
1.
Start the system; see page 37. Start the HPS.
2.
Rotate the switch in the required direction -
Up
and
Down
arrows
indicate resulting crosshead direction.
3.
Hold the switch until the crosshead is at the required height.
4.
Release the switch. The switch automatically returns to its neutral
position and crosshead motion stops.
Display and
associated buttons User control
panel
(
Figure 5 )
The display and its associated buttons operate together with the
controlling software. The numbered buttons, labeled 1, 2, 3 and 4,
operate as either “soft keys” or “live display keys” and the button to the
left of the display is the toggle button that switches the numbered buttons
between those two operations.
As soft keys, you can assign up to four functions that you use frequently,
such as Balance Load. Any soft key functions that you have assigned in
the controlling software are shown in the display next to the appropriate
button. Pressing a button performs the action displayed next to it.
As live display keys, you can assign up to four live displays. The live
displays are copies of any live displays that you have set up in the
controlling software.
If the display is showing live displays you must toggle back to show the
soft key functions if you want to use a soft key button on the control panel.
For information on setting up the display and numbered buttons; refer to
the controlling software’s On-line Help.
Jog Controls User control
panel
(
Figure 5 )
These buttons actuate the piston of the hydraulic cylinder in the direction
indicated. When the
JOG DOWN
button is held longer than three
seconds, the dump valve will open to allow oil to return directly to the
reservoir, thus providing for a faster unload rate. The dump valve actually
cycles to maintain the error signal within prescribed limits. This can cause
a pulsing sound from the frame while it is unloading. This is considered
normal and is not a cause for concern.
If you hold the button in, the adjustment speed increases linearly, up to a
preset maximum, until you release the button.
FINE JOG
(or FINE POSITION) User control
panel
(
Figure 5 )
Turn this thumbwheel for slow but accurate positioning of the piston
within the hydraulic cylinder.
FINE JOG
allows you to set an accurate
zero extension point, or to set a precise grip position for loading
specimens. It can also be used to apply a controlled preload to
specimens.
ZERO EXTENSION
(or RESET GL) User control
panel
(
Figure 5 )
Press this button to set the current position of the piston as the zero
extension point (or gauge length) position. After setting the zero extension
point, the piston returns to this position when:
•
The piston encounters a pre-set limit or event that instructs the piston
to return to zero extension point
•
You press the
RETURN
button (with Bluehill software only)
Table 9. Control functions. (Continued)
Control Location Description