(1) Prepare the specimen as required by the rock test code. (2) Check that the tester is installed smoothly and that the loading and unloading of the jack are normal, and check that the ball seat between the jack and the pressure frame should be in the process. (3) adjust the middle screw of the Jack according to the height of the sample, make the bottom plate of the lower pressure head rise (or drop) to the appropriate height, tighten the lower screw of the Jack with the Jack pressure rod (see schematic diagram)(4) put the sample between the upper and lower head, select the position of the compression point, and load the Jack at the same time, so that the sample and the head can be in complete contact.