Humboldt H-1068 Series Ductility Testing Machines - Manual (Page 3)

Introduction
Applications
Ductility machines are used to determine the ductility of formed asphalt/cement
or semi-solid bitumen by measuring the distance of elongation before reaching
the breaking point of a briquet sample, which is pulled apart at a specific speed
and temperature. The H-1068 Ductility machines meet ASTM D113, D6084 and
AASHTO T51, T301 and T300 when H-1021 is utilized. In the absence of any
specified variations in the test method, the test procedure as outlined in these
instructions may be followed.
Installlation
Humboldt H-1068 Ductility machines are shipped complete, ready for
operation. Standard units are supplied for operation on 120V 60Hz or 220V
50Hz operation. Be sure that the power cord is plugged into a properly
grounded electrical outlet. For accurate and repeatable operation, the unit
should be used on a flat, level surface. For best results the unit should be
mounted on four rubber pads.
Note: 220V 50Hz circulators do not ship with a plug on the power cord.
If it is necessary to select different power cord, follow guidelines in the
circulator user manual.
Description
The water bath trough size is 77" x 9-1/2" x 6-7/8" (L x W x D) and is
constructed of polished stainless steel with over flow.
The synchronous, direct-drive motor can be set to maintain a speed of 1/4,
1 or 5 cm per minute. A single, lead screw prevents agitation of water and pre-
mature rupture of specimens, traveling pointer indicates exact position of car-
riage on a linear centimeter scale attached to the front edge of the trough. The
trough is double-wall insulated. Gears & other parts are bronze or solid brass for
lubrication and to prevent rust.
The temperature range of the circulator is -13°F to 300°F (0°C to 30°C). This
permits tests to be run above or below room temperature throughout the entire
testing operation. Some of the features of the circulator include solid state
control; zero crossover, integrated circuitry with contact thermometer; heater
wattage adjustable to 1000W; refrigeration unit is 500W; a three-wire cord is
furnished with the ductility machine and constant temperature circulator. Each
unit can be operated independently.
The temperature tolerance can be more easily achieved by using the cover
H-1068PC, which is available as an accessory.
Standard model operates on 120V, 60Hz, .5F version operates on
220V, 50Hz A.C.