Calculate the DER value in µSv/h by the formula (3.1).
Calculate the main relative error of measurement in percentage.
Place the УПГД-3В carriage together with the radiometer in the position,
where DER from
137
Cs source is 800 µSv/h, and wait until the statistical error of
DER measurement results goes down to the value of not more than 10 %. Then
register five DER measurement results in the protocol with 5 s interval.
Calculate the average DER value and the main relative error of measurement
in percentage.
The radiometer is acknowledged to have passed the verification if the main
relative error in percentage during measurement of each DER level does not exceed
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