Accredited by the Bulgarian Accreditation Service

in compliance with EN ISO / IEC 17025:2018

Certificate No 22 ЛК / 17.01.2024

We perform calibration of the following measurement equipment types:

1. Voltmeters for direct voltage – scopes from 0.02 to 1000 VDC
2. Voltmeters for alternating voltage – scopes from 0.2 to 1000 VAC (50Hz)
3. Ammeters for direct current – scopes from 0.2 mA to 10 ADC
4. Ammeters for alternating current – scopes from 2 mA to 10 AAC (50Hz)
5. Ohmmeters ( R ) – scopes from 0.01 Ω to 100 kΩ
6. Equipment for measurement of parameters of el. installations:
   • ground resistance RA (RE) – scopes from 0.5 Ω to 2 kΩ
   • “phase-zero” loop impedance, phase-insulated conductors (LOOP) in scopes from 0.1 Ω to 200 Ω
   • contact voltage Uc (Uf) - scopes from 0.1 V to 90 V
   • trip current of  RCDs - 10mA, 30mA, 100mA, 300mA, 500mA
   • trip time of RCDs and other protection equipment
   • insulation resistance (megohmmeters) – scopes up to 1 ТΩ by test voltage up to 5000V
7. Current clamps for direct and alternating current in ranges from 10 to 950 A AC/DC

A scanned copy of our certificate of accreditation you can find here.

And the Appendix pages with the scope of accreditation you can find here.

Contacts:

E-mail: lab@deltainst.com

Eng. Diliana Samardzhieva     Tel: +359 2 974 62 37

Eng. Mihail Mihaylov     Tel: +359 2 974 62 37