Loading Unit
The loading unit is of fully welded construction having a cross head, base and solid side plates. The hydraulic jack is fixed to the base. The platens of the machine are hardened, ground and polished and provided with guidelines to keep the specimen coaxial with hydraulic ram.
The upper platen is provided with self- aligning action to facilitate testing of various size specimens, suitable size spacers are provided.
The loads are measured on Bourdon tube type load gauges which are calibrated against certified proving rings. The load gauges are fitted with a maximum load pointer.
Both the Pumping units, Manually operated and Electrically operated, are of two-speed design. The two speed pump facilitates fast approach of the platens for daylight closure, thus eliminating the need for the lead screw.
In the Electrically Operated Pumping Units, load gauges are fitted with micro switches to switch-off the motor when the load approaches the maximum capacity of the gauge, avoiding any over-loading. Relays are incorporated so that the motor does not restart on its own after a power breakdown.
The electrically operated pumping units are provided with a control knob to adjust the pace rate which can be effectively controlled by an experienced operator during the course of testing, by observing the progress of the load gauge reading.
