Humboldt HM-2800 Multi-Speed Load Frame - Manual (Page 6)

Operation
Control Panel
An On-Off rocker switch on the front right side on the machine is the
power switch and is illuminated when in the On or I position. The
control panel is situated on the front left hand side of the machine base.
A backlit LCD displays the speed and units in either in/min or mm/min.
A membrane key pad enables setting the speeds and units and control
of machine travel.
Speed Selection
On the control panel pressing the Enter/Edit key causes the display
cursor to blink indicating you are in the edit mode. Select the
magnitude of the digit using the up or down arrow key(s). Pressing the
Next Digit key moves the cursor to the next position for selection of
the digit for that position. When finished, pressing the Enter/Edit key
enables return to the operating mode.
Units Selection
From the edit mode press the Rapid Platen Up/Stop key to select
inches/min or press the Rapid Platen Down/Stop key to select
millimeters/min. Press the Edit key to return to operating mode.
Running a Test
After selecting the desired speed and positioning the sample, initiate
a test by either pressing the Run Test key, or if running a Marshall/ TSR
test pressing that key. Note, the Marshall/TSR key allows running this
test while leaving another preset speed in the display. Upon conclusion
of the test press the Stop Test key (or either of the Rapid Platen/Stop
keys). See Page 7 for a chart of common tests and test speeds.
Rapid Travel
Pressing either of the Rapid Platen/Stop keys allows travel at slightly
over 2 in/min in the direction chosen and re-pressing either key will
stop the travel.
Maximum Travel
A redundant limit switch prevents over travel in the down direction
by stopping the machine automatically. Maximum travel in the up
direction is limited by the jack screw extending beyond its housing
preventing further loading. The maximum travel of the platen is 3.50
inches (88mm).
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