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Calibrating Machine, Universal
Calibrating Machine, Universal
Morehouse universal calibrating machine is a device in which a load cell and a proving ring can be positioned and loaded in series with a mechanical force. This machine is very useful to calibrate proving rings, hardness testers, load cells and ring force gauges. The mechanical force is produced by a special hydraulic jack activated by a precision, dead weight type two-speed pump. The machine is designed so that it can quite easily be adapted to calibrate either compression-type or tension-type load cell. It is available in many different capacities from 10,000 pounds to 1,000,000 pounds. Special capacities are designed and made to order. The entire design of the machine has just one purpose -ultimate accuracy. Friction between the calibration standard (proving rings, etc) and load cell has been completely eliminated. This is essential as even the slight friction found in some types of calibrating machines results in gross inaccuracies. The jack is designed and constructed so that its leak rate is low enough as not to interfere with precise calibration work. It is activated by a precision two-speed pump which advances the ram quickly until a pressure of about 750 PSI is reached and then more slowly until the desired load is achieved. An auxiliary screw piston is provided on the pump for application of loads in minute increments. The pump is connected to the ram by a hydraulic hoses with quick disconnect couplings.
