14 Laboratory services
SONEL Testing and Calibration Laboratory has been accredited by the Polish Center of Accredi-
tation 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
instruments”, SONEL S.A. recommends periodical metrological inspection of the instruments it manu-
factures 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.
NOTE!
The person performing the measurements should be absolutely sure about the effi-
ciency 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
confirmed by PCA), it is certain that they were made in accordance with applicable
standards, procedures, including the best reliability.
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