Humboldt HM-2800 Multi-Speed Load Frame - Manual (Page 2)

Introduction
Applications
The HM-2800 Multi-speed Load Frame is designed for those who want
a high-quality but simple, multi-purpose load frame without built-in
data acquisition capabilities. The HM-2800 is ideal for applications
where the operator either is not concerned with data acquisition; or,
already has or is planning to construct their own data acquisition
system. With its digital display, the HM-2800 provides the operator with
the ability to precisely select any speed with three decimal accuracy
within the machine’s speed range.
The HM-2800 features a quiet, direct drive DC motor that provides a
range of loading speeds from .008 to 1.999 in/min. This speed range
is more than adequate for the majority of standard soil tests. The
HM-2800 also incorporates a separate, dedicated control to
accommodate 2.00 in/min. for use in Marshall and TSR Testing, as
well as a rapid travel speed of 2.25 in/min for moving the platen into
position quickly. Speeds are controlled through the use of edit keys and
a digital display.
Product Use
This product is intended for use only in accordance with the directions
and specifications contained in this User Guide. The HM-2800 Multi-
speed Load Frame has been designed for testing that complies with
ASTM D1883, D2850, D2166, D4767, D5581 and D6927 and AASHTO
T193, T296, T297, T208, T245, T246, as well as other applicable
International standards.
Features include:
• 10” nickle-plated platen provides roomy, stable base
for test equipment
• Backlit LCD display
• Test speeds adjustable from .008 to 1.999 in/min. via keypad
• User selectable unit change from keyboard between U.S. Standard
and Metric units.
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