Power Unit and Frame with manually operated safety cover
Manual Load Lock for repeat testing
Cylinder Speed Adjustment
Load Limit Control
Load Cell and Digital Meter with Auto Ranging:
1% to 100%
1,000 to 100,000 lbs.
(453.6 kg to 45,360 kg)
Lower limit 1% -- 1,000 lbs. (453.6 kg)
Portable Load Cell
Specifications
Hydraulic Cylinder Stroke 36" (0.9144m)
Total length 21' 4" (6.5024m)
Maximum pull pin to pin (approx.) 15' (4.572m)
Width outside (standard) 38" (0.965m)
Center line height from floor (std) 13-1/2" (34.29cm)
Speed of cylinder per min. (approx.) 36" (0.9144m)
Features
Tension is supplied by the hydraulic cylinder. For easier and
faster hook up, the cylinder is in the pulling mode.
The portable proof tester does not have
an adjustable carriage. The Roberts wire rope grip (literature
is attached) serves as the adjustment device for different lengths
of slings. A sling 11/2" (3.81
cm) or 2" (5.08 cm) is placed in the grip. As the length needs
changing, the sling in the grip is moved to a different position,
thereby shortening or lengthening as needed. By turning a longer
sling around and testing both ends, up to a 30' (9.144 m) long
sling may be tested.
Speed adjustment is another feature of 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 foundation of this system is the hydraulic
power unit. The ability 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
United States National Institute of Standards and Technology.
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 a proof test or a 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 machine
and still have good visual contact.
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
also has electric valves versus manual valves.
For repeat testing, a manual loadlock is furnished at no charge.
For testing several items, the operator sets the loadlock on the
first test piece. The machine will automatically return to this
pressure load each time a new piece is placed into the machine
A remote control pendant is furnished at no charge. This allows
for safer, faster, and easier hookups.
The load measuring system electronic load
cell is the heart of the system. The load cell allows the very
accurate recording of the load attained during a test. The electronic
strain gage load cell is an independent measuring system not
tied into the hydraulic system. This load cell system, with two
ranges, may be calibrated to 1% 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).
Load cells and gauges are normally calibrated from 10% to 100%
of their range. The lower 10% of a range is usually not calibrated.
Our Auto Ranging allows calibration from 1% to 100%. The lower
limit is at least 1% of the maximum capacity of the machine.
The load cell is portable. The load cell is designed to be removed
from the test bed and used independently. An example would be load
testing an overhead hoist.
The separate peak/hold system is an excellent feature, it automatically
resets. The peak/hold recall must be manually reset after each
use. At times, the last peak could be lost if the peak/recall were
not reset before each test. With an automatic system, you never
lose the peak of the last test because it automatically resets.
RS-232 compatibility allows optional Test Certificate software
program to print a computer-generated Test.
Additional Features
Length = 21' 4" (6.5024 m)
Test Length = 16' (4.8768 m)
Quick disconnect on hydraulic hoses
Load cell with two ranges:
10,000 lbs to 100,000 lbs
(4,536 kgs to 45,360 kgs)
1,000 lbs to 10,000 lbs
(453.6 kgs. to 4,536 kgs)
75' (22,86 m) of cord from load cell to indicator
Portable
Electrical (power unit)
220 Volts, 3 PH, 60 Hz
7.5 h.p.
Electrical (digital indicator)
110 Volts, 1 PH, 60 Hz
Separate circuit
Weight (approximate)
frame = 1,500 lbs (680.4 kgs)
power unit = 700 lbs (317,52 kgs)
Options
The Roberts Proof Test Certificate software (Test 35) is included
with machine.
Computer with Mircosoft XP software and printer.
Installation Requirements
Installation and training is done under the direction
and supervision of Joseph E. Roberts, President of Roberts Testing
Equipment, Inc. One trip as a minimum will be required to conduct
installation and training at a reasonable rate will be assessed.
Air fare and expenses are not included in this price. The airfare
and expenses will be billed, at cost, on the final invoice.
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
(digital readout, load cell, etc.), test machine frame (frame will
be sandblasted, primed, and painted),
Advise installation,
All training for proper use of test equipment, and
Operation manual and maintenance manuals.
The following is a list of items to be furnished
by the customer:
Labor for installation
All lifting equipment,crane and/or lifts or sufficient size for
safe unloading and installation including operator.
All electrical connections and electrician to hook up motor and
controls.
