The radiation survey meter will not need to be calibrated in the field.
Calibration is performed as part of the annual maintenance on the unit
by the manufacturer. The radiation survey meter operates on alkaline
batteries. The condition of the batteries will be checked prior to each
day's activities by using the battery check
function on the meter. If the batteries are low, they will be replaced
by spares carried by the field team.
Operation of the meter is as follows:
Before attaching the probe to the meter, ensure the unit is turned
Attach the probe to the meter and turn the unit on.
Set the function switch to "Battery Check" and read the
display to determine if the batteries need replacing.
If the batteries are in good condition, set the function switch to
read from 0-10 mR/hour.
Background levels of radiation throughout the United States will
typically range between 5 and 100 μR/hr.
The NRC limits the radiation level in an unrestricted area, i.e., an
area accessible to members of the public, to no greater than 2 mR/hr.
Therefore, while operating the radiation survey meter during fieldwork, if
a reading in excess of 2 mR/hr is observed, the area will be immediately
evacuated until further guidance is received from the Operation Section
After use, the unit will be inspected for damage and cleanliness, and
repaired or cleaned as necessary. The batteries in the unit will be replaced