SECTION THREE OPERATION
3.1 OPERATOR SAFETY
1. Make certain to close and latch the safety shield door before operating the press.
2. The operator should wear safety glasses or a face shield when performing operations under high load
conditions to prevent eye or face injury should a test specimen burst and scatter.
3. When using caustic or acid test specimens, a face shield, apron, and rubber gloves should be used for the
protection of the operator.
4. Place the CARVER 3619 Pellet Die in the recessed area on the 4” dia. Platen (be sure the die is seated in the
bottom of the recess). This will prevent tilting of the platen and possible ejection of the work piece under
pressure. Always avoid uneven loading of the press components. If another die is to be used and its diameter is
greater than that of the recess, insert the filler disk.
WARNING: The use of an extension handle longer than provided with the standard press may cause the press to
be unstable, and may cause an "over pressure" condition, resulting in damage to the hydraulic unit.
5. When the top head has been repositioned, the height on both sides must be measured to be sure that the top
bolster is parallel with the base.
CAUTION: CARVER recommends the use of safety glasses while operating this equipment.
6. Always check the pressure rating of the pressed apparatus prior to pressing to be sure it is rated for the applied
force.
IMPORTANT: The gauge on the CARVER laboratory press shows the total force exerted by the press. It DOES
NOT show the pressure on the specimen (PSI). To find the PRESSURE (P) on the specimen, the
observed FORCE (F) reading on the gauge must be divided by the specimen AREA (A), per the
equation P = F/A. When using a CARVER test cylinder outfit or pellet die, use the ID measurement
to find the actual AREA (A) of the specimen.
3.2 OPERATING THE HYDRAULIC PRESS
Before attempting to operate the hydraulic unit, make certain that the release valve screw is closed finger tight.
IMPORTANT: DO NOT
rotate the release valve more than one full turn in the counterclockwise direction.
Opening the release valve approximately one-half turn releases the pressure and allows the platen to open.
Decompression can be slowed to some degree by very slowly turning the release screw.
Please keep in mind that no hydraulic unit will maintain constant pressure without some additional pumping. This is
especially true when pressing against a soft or yielding material. Some pumping is required to offset normal packing
leakage. After the desired pressure is obtained, an occasional stroke or two will normally maintain the pressure.
3.3 DAYLIGHT ADJUSTMENT
Refer to drawing 100426C for information describing your press.
3-1
To Next Page
Loading...