14 Laboratory services
SONEL Testing and Calibration Laboratory has been accredited by the Polish Center of Accredita-
tion for the calibration of measuring instruments AP 173 in the following field - electrical properties in
DC and LF circuits: voltage and current (DC), voltage and current (AC), resistance (DC), electrical
power.
SONEL Testing and Calibration Laboratory offers validation and
calibration services for the following instruments used for measuring
electrical and non-electrical parameters. The following instrument
types are calibrated:
meters for measurements of electrical properties and parame-
ters of power networks:
o voltage meters,
o current meters (including clamp meters),
o resistance meters,
o insulation resistance meters,
o earthing resistance meters,
o short-circuit loop impedance meters,
o RCD meters,
o power quality analyzers,
o electrical equipment safety testers,
o active and passive electrical power meters for alternating current,
o multimeters,
o multifunction meters covering the functions of the above-mentioned instruments,
standards of electrical properties:
o calibrators,
o resistance standards,
instruments for the measurements of non-electrical:
o pyrometers,
o thermo-imaging cameras.
o lux meters.
The Calibration Certificate is a document specifying the relationship between the standard and the
instrument's indication with indication of measurement uncertainty.
According to ILAC-G24:2007 „Guidelines for the determination of calibration intervals of measuring in-
struments”, SONEL S.A. recommends periodical metrological inspection of the instruments it manufac-
tures no less frequently than once every 13 months.
For new instruments provided with the Calibration Certificate or Validation Certificate at the factory, re-
calibration should be performed within 13 months from the date of purchase, however, no later than
25 months from the date of purchase.
ATTENTION !
The person performing the measurements should be absolutely sure about the efficiency of
the device being used. Measurements made with an inefficient meter can contribute to an
incorrect assessment of the effectiveness of health protection and even human life.
Measurements carried out in an accredited calibration laboratory (with competences con-
firmed by PCA), it is certain that they were made in accordance with applicable standards,
procedures, including the best reliability.
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