Tension is supplied by
a hydraulic cylinder. For
easier and faster hook up, the cylinder is in the pulling mode.
The foundation of this
system is the hydraulic power unit. Being able to control the hydraulics at small increments
with a constant, steady flow of hydraulic fluid to the cylinder allows
us to calibrate to ASTM E-4, 1%, traceable to the National
Institute of Standards and Technology (NIST). Pulsations or
fluctuations in pressure will not be tolerated. These pulsations
or fluctuations of pressure will be transferred into the load cell
and give you erroneous readings on your test data, whether it be
proof test or break test. The power unit is connected to the
test machine by hydraulic hoses. This allows the operator and
control unit to be located away from the test bed and still have
good visual contact. The electric system is 220 / 440 volt,
3 Ph, 60 Hz.
The hydraulic power unit
has very sophisticated and accurate pumps and valves for the purpose
of adjusting very small increases in pressure and maintaining a
very accurate flow. The
power unit has manual valves.
The hydraulic cylinder
is built to our specifications for this application. It is
an expensive, top-of-the-line, high-pressure cylinder, and must
be compatible with the load cell.
Another feature is a speed
adjustment for the cylinders. It is a very simple item but
by incorporating it into the power unit, we are able to make the
cylinder retract at the speed desired.
The load measuring system
electronic load cell is the heart of the system. The load cell
allows very accurate recording of the load attained during a test. The electronic strain gauge
load cell is an independent measuring system not tied into the hydraulic
system. This load cell system, with Auto Ranging, may be calibrated
from 1% to 100% of the maximum capacity of the load cell. The
load cell will calibrate to ASTM E-4,
1%, traceable to the National Institute of Standards and Technology
(NIST).
Auto Ranging Load Cell. Load cells
and gauges are normally calibrated from 10% to 100% of their range. The
lower 10% of a range is usually not calibrated. Auto Ranging
allows calibration at the lower limits.
Computer Software Roberts
Proof Test Certificate software (see Sample).
Computer Hardware. Optional:
Computer with Microsoft XP software and printer.
NOTE. NOT DESIGNED FOR BREAK TESTING,
THERE ARE NO PROTECTIVE COVERS.
Additional Features:
Electrical:
220/440 volt, 3 Ph, 2 H.P.
Size:
10'7" High (approx.)
8"9" pin to pin
2' wide,
2'4 deep
Weight:
Test Stand / 1,200 lbs (approximately)
Power Unit / 500 lbs (approximately)
Installation Requirements
The following is a list of items furnished
by Roberts Testing Equipment, Inc.:
Design and specifications for the testing machine.
All hydraulic power units, cylinders,
load measuring equipment (i.e.: digital readout, load cells,
etc.), test machine frame components. Frame
will be sandblasted, primed and painted.
Advise on installation.
All training for proper use of test equipment.
Operation manuals and maintenance manuals.
The following is a list of items to be furnished
by the customer:
Reinforced concrete slab, commerical warehouse slab is sufficient.
All foundation work for test machine, including anchoring points,
and anchoring (if required).
All lifting equipment, crane and/or lift of sufficient size for
safe unloading and installation including operator.
All electrical connections and electrician to hook up motor and
controls.
Separate Circuit 110-volt for the computer and indicator. Make
sure you have surge protection to prevent lightning damage. Surge
protector should have gas tube and MOV elements, 55dB electrical
noise filter, 1,550-joule rating (Radio Shack #61-2323 or equal). Do
not split 110-volt power off of 220-volt, 3 phase line.
All installation and equipment for installation. Estimate
maximum two (2) men for 1/2 day.
Miscellaneous hand tools including hammer drill and air compressor,
welder and cutting torch.
Extra hydraulic oil equal to Chevron AW 46.
Touch up paint after installation if desired, Sherwin-Williams
5202-14230 or spray 140-0621
10,000 LB. (4,536 KG.)