BS IEC 62534 pdf download RADIATION PROTECTION INSTRUMENTATION – HIGHLY SENSITIVE HAND-HELD INSTRUMENTS FOR NEUTRON DETECTION OF RADIOACTIVE MATERIAL 4.2 Physical configuration The instrument case design shall meet the requirements stated for lP code 53 (seeIEC60529). Controls and adjustments that may affect the operation of the instrument including setting ofalarms shall be designed so that access to them is limited...