Pre / post-survey instrument checks : Radiation monitoring strategy : Radiation : Good practice online modules : Publications : National Physical Laboratory

Pre-/post-survey instrument checks

Man checking off items in a to do list Before the use of any instrument consideration should be made to the:

limitations of calibration
mechanical condition
battery condition
cable and connector conditions
background indication
potential for surface contamination on the instrument itself
response to a check source
display digits (smooth operation)
analogue meter (free movement of needle)
audio output
condition of the detector window (e.g. light leaks)
alarm setting
mode of operation

Appropriate check sources with sufficient output to produce a significant reading on all instruments used on a job are extremely useful.

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