2.2.4 Recommendations on targets inspection.
2.2.4.1 When evaluating the radiation environment remember, that the ionizing
radiation has a statistical stochastic nature, so even in the same conditions the readings of
the product for a short measurement period will be slightly different from each other. For
more accurate determination of dose rate and flux density, we recommend to carry out not
less than 8 cycles of observations without switching the product off (until the icon « » –
the full «glass» appears).
2.2.4.2 Since the case of the product absorbs beta particles, to estimate the beta-
radiation you should place the switched on product with the back side (with open window
of the beta-detector (see art. 1.3.1)) in the direction of the radiation source, so that both
detectors are over the scanned target. When the location of the radiation source is
unknown, carry out the evaluation in different directions to achieve maximum values.
2.2.4.3 When determining the radioactive contamination of foodstuffs, household
items, etc. you should move the product to the object of study at a distance of 3 to 5 mm,
switch it on and carry out a survey.
2.2.4.4 In detecting the radioactive contamination of the liquids dose the dose rate
evaluation is carried out over the open surface of the liquid. To protect the product in such
cases we recommend using a plastic bag, but no more than one layer. Remember that any
material is a filter for beta radiation and the readings may be distorted. Do not allow liquid
to the surface and inside the unit.
2.2.4.5 The estimation results exceeding the level of the natural radiation
background, which is characteristic for the area, evidence of radiation contamination of the
object being surveyed. For the convenience of the survey there is an estimation of the
background and the mode «MEASURE» taking the background into account in this
product (art.1.3.3.1).
2.2.4.6 To determine the location of the source of ionizing radiation you should move
the product over the surface of the object being surveyed, focusing on the increasing of
the sound signals frequency. Remember that the signals frequency will increase sharply
as the product approaches the source, and as the product moves from the source it will as
sharply decrease. To implement the source detection according to the sound frequency
switch on the ring in the «MENU» or switch off the threshold.
2.3
Utilization of the product
2.3.1 Switching on the product.
Before switching the product on you must push the shutter closing the beta-detector
window with the runner up to the stop.
To switch the product on, press
C
(see art. 1.3.1.4), then will «screen RD1008»
appears on the display.
RD1008
■
●
MENU
OFF
●
25
