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8.1 Quantization
error
With a dose of 40 kGy and a measured intensity of 1000, the relative quantization error is 0.75 %.
With the same dose and a measured intensity of 500, the relative quantization error is 1.5 %.
9. Measuring
film
Pararosanilin is also UV-sensitive and should therefore not be exposed to sunlight. The film
should be stored away from bright light.
However, the film is not so sensitive that it has to be covered during the measurement process.
No discoloration will occur if the film sheets are openly placed on the measurement surfaces in
ordinary room lighting.
The measuring film is supplied in rolls 20 m long and 25 mm wide; it consists of 2 layers for
ease of handling.
- the actual dosimeter film (thickness approx. 20 µm or 20 g/m
2
) and
- a supporting film (thickness approx. 50µm) for better handling of the dosimeter film.
Please note that the dosimeter film must always lie on top when measuring doses with low-
energy electrons.
The dosimeter film should be evaluated without the supporting film. If you wish to perform
evaluation using supporting film, the dosimeter must first be calibrated with the supporting film
and without the dosimeter film.
The maximum operating temperature must be taken into account during measurement. A
maximum temperature of 50°C is specified for the film. At temperatures higher than this, the
dosimeter film is prone to stronger discoloration than that caused by the ionizing radiation. In
electron beam engineering, irradiation does not produce this temperature.
Delivery size:
20 m long x 25 mm wide rolls Article No: 6 710 022
Dosimeter film thickness:
approx. 20 µm
Supporting film thickness:
approx. 50 µm
Max. dose in the linear range:
80 kGy
Max. temperature:
50°C
Tempering:
15 min at 40°C, after irradiation,
for artificial ageing at accurate measurements
Storage:
in dark places, sensitive to UV
