Equipment and Calibration
The reliability of our results depends on the accuracy of our equipment. Equipment that affects test results is calibrated by a calibration laboratory accredited by TÜRKAK to TS EN ISO/IEC 17025. Below you will find our equipment and the current calibration certificate for each item.
Every certificate can be verified independently by scanning its TÜRKAK QR code at asist.turkak.org.tr. Calibrations are renewed annually; equipment outside the scope of accredited calibration is controlled through our written internal verification and maintenance programme.
Concrete
| Equipment | Make / model | Calibration certificate | Date |
|---|---|---|---|
| Concrete compression testing machine 2000 kN (TS EN 12390-4:2025, Class 1) | UTEST UTC-4231 | 0036K-0326-04813 | 04.04.2026 |
| Diamond core drilling rig | Hilti DD 200 | Internal verification / maintenance programme | — |
| Diamond core drilling rig | Hilti DD 160 | Internal verification / maintenance programme | — |
Measuring and general equipment
| Equipment | Make / model | Calibration certificate | Date |
|---|---|---|---|
| Precision balance | DİKOMSAN JS 06 BH | 0036K-0326-04805 | 04.04.2026 |
| Precision balance | DİKOMSAN QW | 0036K-0326-04806 | 04.04.2026 |
| Precision balance | DİKOMSAN EHB | 0036K-0326-04807 | 04.04.2026 |
| Precision balance | DİKOMSAN QW | 0036K-0326-04814 | 04.04.2026 |
| Drying oven | UTEST UTC-1300 | 0036K-0326-04808 | 04.04.2026 |
| Digital caliper | INSIZE 1103-300 | 0036K-0626-00549 | 04.06.2026 |
| Steel rule | — | 0036K-0326-04596 | 07.04.2026 |
| Dial gauge | — | 0036K-0326-04633 | 07.04.2026 |
| Dial gauge | — | 0036K-0326-04634 | 07.04.2026 |
| Temperature and humidity meter | HTC-1 | 0036K-0326-05137 | 06.04.2026 |
| Temperature and humidity meter | HTC-1 | 0036K-0326-05138 | 06.04.2026 |
| Glass thermometer | — | 0036K-0326-05139 | 06.04.2026 |
| Glass thermometer | — | 0036K-0326-05140 | 06.04.2026 |
| Glass thermometer | — | 0036K-0326-05141 | 06.04.2026 |
| Infrared thermometer | TOLSEN 35196 | 0036K-0326-05142 | 06.04.2026 |
Soil and aggregate
| Equipment | Make / model | Calibration certificate | Date |
|---|---|---|---|
| CBR load frame 50 kN | UTEST | 0036K-0326-04810 | 04.04.2026 |
| Methylene blue test set | UTEST UTA-0439 | 0036K-0326-04815 | 04.04.2026 |
| Proctor rammers (standard / modified), CBR moulds | — | Internal verification / maintenance programme | — |
| Casagrande liquid limit device | — | Internal verification / maintenance programme | — |
| Los Angeles abrasion machine | — | Internal verification / maintenance programme | — |
| Marshall compactor and moulds | LİYA | Internal verification / maintenance programme | — |
| Sieve shaker | — | Internal verification / maintenance programme | — |
Field
| Equipment | Make / model | Calibration certificate | Date |
|---|---|---|---|
| Light weight deflectometer (LWD), 10 kg, Ø300 mm plate | Zorn ZFG 3.1 | Manufacturer calibration (annual) | — |
| Sand cone set | — | Internal verification / maintenance programme | — |
| Dynamic cone penetrometer (DCP) | Matest S051N | Internal verification / maintenance programme | — |
Test sieves (ISO 3310-1:2016) – 31 sieves, each with its own accredited certificate
| Aperture (mm) | Make / model | Calibration certificate | Date |
|---|---|---|---|
| 75 | UTEST | 0036K-0326-04567 | 07.04.2026 |
| 50 | UTEST | 0036K-0326-04568 | 07.04.2026 |
| 37.5 | UTEST | 0036K-0326-04569 | 07.04.2026 |
| 31.5 | ENDECOTTS | 0036K-0326-04579 | 07.04.2026 |
| 25 | UTEST | 0036K-0326-04570 | 07.04.2026 |
| 22.4 | ENDECOTTS | 0036K-0326-04580 | 07.04.2026 |
| 19 | UTEST | 0036K-0326-04571 | 07.04.2026 |
| 16 | ENDECOTTS | 0036K-0326-04581 | 07.04.2026 |
| 12.5 | LİYA | 0036K-0326-04577 | 07.04.2026 |
| 9.5 | UTEST | 0036K-0326-04572 | 07.04.2026 |
| 8 | ENDECOTTS | 0036K-0326-04635 | 07.04.2026 |
| 5.6 | ENDECOTTS | 0036K-0326-04582 | 07.04.2026 |
| 4.75 | UTEST | 0036K-0326-04573 | 07.04.2026 |
| 4 | ENDECOTTS | 0036K-0326-04583 | 07.04.2026 |
| 2 | UTEST | 0036K-0326-04574 | 07.04.2026 |
| 2 | ENDECOTTS | 0036K-0326-04584 | 07.04.2026 |
| 1.7 | UTEST | 0036K-0326-04590 | 07.04.2026 |
| 0.850 | UTEST | 0036K-0326-04589 | 07.04.2026 |
| 0.500 | ENDECOTTS | 0036K-0326-04585 | 07.04.2026 |
| 0.425 | UTEST | 0036K-0326-04575 | 07.04.2026 |
| 0.250 | ENDECOTTS | 0036K-0326-04586 | 07.04.2026 |
| 0.250 | UTEST | 0036K-0326-04591 | 07.04.2026 |
| 0.180 | LİYA | 0036K-0326-04578 | 07.04.2026 |
| 0.125 | ENDECOTTS | 0036K-0326-04587 | 07.04.2026 |
| 0.106 | UTEST | 0036K-0326-04592 | 07.04.2026 |
| 0.075 | UTEST | 0036K-0326-04576 | 07.04.2026 |
| 0.075 | UTEST | 0036K-0326-04594 | 07.04.2026 |
| 0.075 | LİYA | 0036K-0326-04595 | 07.04.2026 |
| 0.075 | LİYA | 0036K-0326-04636 | 07.04.2026 |
| 0.063 | ENDECOTTS | 0036K-0326-04588 | 07.04.2026 |
| 0.063 | UTEST | 0036K-0326-04593 | 07.04.2026 |