Ada Schmidt Hammer 225 А00191 [27/36] Schmidt hammer 225

Schmidt Hammer 225

MEASUREMENT FOUNDATION

Operational procedures of test hammer

Test hammer proper operation can improve the testing accuracy. Test hammer in operation throughout the entire process

should pay attention to hand holding instruments posture correct: namely, One hand hold the front part of the Test Ham-

mer, the other hand hold and pressure the tail of end cover. The basic essentials of operation are: slowly and evenl with

the pushing press, vertical alignment measurement surface and no shaking.

Test hammer procedures are as follows:

1. Return zero

Test hammer strike rod withstand the concrete components surface, press tail cover lightly, positioning pins disengaged

hook-oriented ange; slowly lifting instrument, under the action of the compression spring, strike rod shots out, hook and

rebound hammer hung at the same time-oriented ange will be brought to zero pointer to the pointer slider, that red scale

line on the pointer slider overlap the zero line and Gauge.

2. Test Hammer action to obtain the energy

Would have been shot out of the strike rod targeting the surface of concrete component measuring point, even slowly

pushing and press Test Hammer, strike rod has been pressed into the Test Hammer, strike tension spring stretched; when

the instruments to push down to a certain location , hook back on oriented ange contact to the end of adjust bolt on back

cover and starts turn, to hook disengaged strike hammer monment, strike tension spring elongation up to the require

standard length 75mm, at this time has been nominal kinetic energy of 2.207Nm, rebound hammer in a hair-trigger state.

This operation process should be always maintained Test Hammer axis perpendicular to the inspecting surface, aviod

pushing and pressure force is too big and speed too fast.