The national standard for AC/DC voltage transfer of Slovakia will be calibrated by PTB on a regular basis: AC voltmeter HOLT 68 in the voltage range from 1 V to 1000 V and at frequencies from 40 Hz to 100 kHz.
Progress Report 2018-08-14
Recalibration of thermocomparator HOLT is done every 5 years at PTB.
Next calibration is planned for 2019.
Progress Report 2014-03-20
update, calibration of AC voltmeter, recalibration interval 5 years