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 to authorized persons.
Provisions shall be made to permit testing of visual and/or sound warning indicators withoutthe use of radiation sources.
Alarm threshold values shall be calculated by the instrument automatically using backgroundmeasurements and user definable alarm factors.
4.3.1 Documentation supplied
The manufacturer shall provide instrument performance specifications and instructions foroperation.See Clause 8 for details.
Manufacturer provided information shall describe the radiation detector types used for neutrondetection and the personal protection alarm (e.g.， 3He,GM).For gas-filled counter tubes theinternal pressure shall be stated by the manufacturer.
The instrument’s fluence response to bare and moderated52cf shall be stated by themanufacturer.
The dimensions of the instrument shall be specified by the manufacturer with maximumdimensions of 350 mm x 200 mm x 150 mm excluding the handle.
The weight or mass of the instrument shall be specified by the manufacturer and should beless than 5 kg.
4.4Operating modes4.4.1 Monitor mode
The instrument shall have the ability to monitor the area surrounding the instrument forchanges in radiation levels that may be caused by a source passing through the area.Thisshall be done without actions by the user and shall work autonomously.The user shall havethe ability to select whether the alarm will be silent or audible,and visual or not.
The instrument shall have a search function that is activated by the user.The instrument shallprovide an audible and visual indication when operated in search mode.Audible and visualindications shall be related to the magnitude of the radiation field (e.g., increasing frequencyor pitch of beep tone with increasing radiation signal) for eyes-free searching and localization.
4.4.3 Integration mode
The instrument shall have the ability to integrate counts for an extended period of time. The start and end of the integration time shall be user activated with the accumulated counts displayed as the measurement proceeds. An alarm shall be provided based on the accumulated counts. The integrated mode alarm method shall be described by the manufacturer.