The CalCard EXT1 works similar to the more commonly termed "".
It provides a range of fixed calibration resistance's for confirming
the operation of electricians insulation and continuity instruments as
per NICEIC .. This is a fundamental requirement of "Part P" for domestic installers.
The CalCard EXT 1
is currently been used by hundreds of Part P registered tradesmen who
have been certified and their records checked by inspectors against
measurements using the CalCard Ext 1
professionals are members of various institutes and recognised bodies.
To date the Calibration Checkbox CalCard Ext1 has been viewed and
accepted by IEE, NICEIC, NAPIT, ECA, IET and ELECSA to name but a few.