Ada Schmidt Hammer 225 А00191 [29/36] Schmidt hammer 225

Schmidt Hammer 225

MEASUREMENT FOUNDATION

3. Updated the concrete strength presumed method for single piece and batch inspecting.

Calibrate Test hammer

In order to ensure the Test Hammer reliability of technical performance and rebound method measurement accuracy

should be regular or irregular status of the instrument calibration. Calibration of test hammer divided into general and

periodic.

General calibration

Hammer commonly used frequently within effective certication period, the user as the case may be self-calibrate. The

standard self-calibrate devices at home and abroad are generally Hammer steel anvil at present For the Test Hammer

nominal kinetic energy < 2.207N. m, using GZ16 steel anvil Hammer machine technical status of a general self-calibrate

is entirely feasible.

Usually when the Test Hammer use frequently or has doubt for the instrument inspecting data, can calibrate on the steel

anvil, looked at the calibrating of rebound values Rm whether in the 8 0 + 2 or not . With only the calibration of steel anvil

Hammer rebound values to determine whether it is in normal is not complete. Operation must obtain the following proce-

dure that test hammer’s state of technology compliance with standards and using requirements:

1. Check the maximum static friction force between pointer slider and shaft in the machine should be within the 0.5-0.8N,

if it does not meet the requirements to adjust.

2. Check the length of the effective work of strike tension spring is 61.5mm,

usually can adjust strike tension spring different holes location on spring seat to

meet the technical requirements.

3. Check the tension spring stretched standard length is 75mm. The technical parameter can be measured which instru-

ment should be work state, that is in the instrument to measure the length. Users inspecting the parameter is difcult to

measure under lack of detecting condition of Test Hammer.