IEC 60846-2-2015 pdf free download.Radiation protection instrumentation – Ambient and/or directional dose equivalent (rate) meters and/or monitors for beta, X and gamma radiation – Part 2: High range beta and photon dose and dose rate portable instruments for emergency radiation protection purposes. 8.15.2 Method of test The instrument shall be tested as required in 8.1 through 8.14 with the detector located at the minimum and maximum distances (or cable length) specified by the manufacturer. The response shall be the same, within 5 %. for both distances (or cable length). 9 Electrical characteristics of directional and ambient dose equivalent (rate) meters For the purposes of this standard, 9.1 to 9.3 of IEC 60846-1:2009 apply, without modifications, except as stated in the following subclauses. The changed subclauses are identified by the same number as in IEC 60846-1 :2009 or, for new subclauses. by a higher number not used in IEC 60846-1:2009. 9.2 Warm-up time 9.2.1 Requirements The instrument shall be capable of starting operation at the lowest temperature of the rated range and operate as normally. One (1) minute after instrument switched on, the indication shall not differ by more than 10 % from the value obtained after 60 mm. 9.2.2 Test method The dose equivalent meter with the batteries fitted shall be placed for at least 4 h inside the environmental chamber with the temperature at –25 °C. With the dose equivalent (rate) meter switched off, expose it to an appropriate radiation source that will provide an indication in the second most sensitive range. Switch on the instrument and note the readings every 15 s during a period of 2 mm after switching on. 60 mm after switching on take a sufficient number of readings and use the mean value as the final value of the indication. 9.2.3 Interpretation of the results From the graph of readings as a function of time determine the reading after 1 mm. If this value does not differ by more than 10 % from the value obtained after 60 mm then the requirements of 9.2.1 are met. 10 Mechanical characteristics of directional and ambient dose equivalent (rate) meters For the purposes of this standard, 10.1 to 10.3 of IEC 60846-1:2009 apply, without modifications, except as stated in the following subclauses. The changed subclauses are identified by the same number as in IEC 60846-1 :2009 or, for new subclauses. by a higher number not used in...
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