Doza DKG-07D Panduan Pengguna - Halaman 10
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6) calculate relative measurement error of AED of gamma radiation , in per cent, by the
following formula
*
where
H
t
is the reference (calculated) value of AED, μSv;
ref
H
*
is the arithmetic mean value of three measurement results of AED for the test point, μSv;
mean
is the uncertainty of the calibration installation (from the calibration certificate), %.
CAL
t is the duration of exposure, hours.
The result of calibration is considered satisfactory if the relative measurement error of AED of
gamma radiation does not exceed the limit stated in the section 1.2.3.
5 ROUTINE REPAIRS
5.1 Possible problems and their solutions are shown in the Table 5.1.
Table 5.1 - Possible problems and their solutions
Problem
Dosimeter won't turned on
After the dosimeter is turned on
random symbols appear on the LCD
6 STORAGE
6.1 Prior to putting into operation dosimeter shall be stored in a heated warehouse with natural
ventilation:
-
in manufacturer's package – at ambient temperatures from +5 to +40 C and relative
humidity up to 80 % at +25 C;
-
unpacked – at ambient temperatures from +10 to +35 C and relative humidity up to 80 %
at +25 C.
6.2 The storage location should be free of dust, chemical vapours, aggressive gases and other
substances that may cause corrosion.
The storage location shall exclude exposure of dosimeters to the direct rays of sunlight.
7 TRANSPORTATION
7.1 Dosimeters in the original manufacturer's package can be transported by all means of
transport at any distance:
-
transportation by railway shall be carried out in clean boxcars;
-
when transported by open motor transport boxes shall be covered by the water-proof
material;
-
when transported by air the boxes with dosimeters shall be placed in air-tight heated
compartment;
-
when transported by water and sea transport the boxes with dosimeters shall be placed in
the hold.
*
Н
H
mean
1
1 .
*
H
ref
Possible cause
Batteries are discharged or absent
No contact between batteries
Batteries are discharged
FVKM.412113.026RE
10
2
*
t
2
ref
100
CAL
t
Replace batteries
(4.2)
Solution