1, concrete 4--5 days after concrete solidification before the test machine.

2, with the level of instrument examination suspended roller shaft is leveling, if indeed there is no problem with the coupling nut fastening tightly and check other nut is tightly.

3, check the power supply voltage: rated voltage of 380 volts, the error of 10%.

4, check the electrical wiring and electrical components of the distribution box is connected firmly, the shell must be reliable grounding, the grounding resistance is less than or equal to 4. All lines should be properly placed, to prevent work accidents caused by crushing bumps.

Taper pin 5, inspection positioning door frame is locked.