Metrology laboratory
Calibration of measuring devices
The Institute’s metrology laboratory calibrates, as accredited activities, the measuring devices as follows:
- Vernier callipers,
- clock-type dial indicators,
- electrical displacement transducers,
- steel pocket rules,
- force measuring instruments,
- bar sieves.
- Vernier callipers for proportional division,
- thickness gauges,
- feeler gauges,
- laser length measuring devices,
- measuring pins, measuring magnifiers,
- strain gauges,
- meters of air content in fresh concrete,
- special measuring test equipments.
Verification of designated measuring devices
As the authorized body, the metrology laboratory verifies measuring devices designated by the decree of the Office of Standards, Metrology and Testing No. 210/2000 Coll. for a mandatory periodic verification, namely:
- test sieves of woven wire, perforated plate and electric forming film
- compressive and tensile force test machines
- tensioning machines for manufacture of prestressed concrete
- concrete test hammers, type Schmidt
- steel pocket rules – metal materialized measures of length
To verify test sieves the laboratory has initiated and achieved validation (amendment of the abovementioned Decree in 2008) in determining the average size of the holes. This is done by sieving special glass beads with identified distribution of individual fractions in a premixed batch of beads. The laboratory has been applying this method very effectively for a long period of time.
When it comes to verified force test machines, presses for testing the strength of hardened concrete dominate. The Institute was the first in the Slovak Republic to verify the presses according to EN 12390-4, i.e. verifying not only the force, but also the rate of force increase and the application of force on the specimen influenced, first of all, by the behaviour of the joint.
Contact:
Ing. Marián Hatala
Phone: +421 2 49228 128
Fax: +421 2 49228 444
E-mail: hatala@tsus.sk