VEGA WEIGHTRAC 31 4 … 20 mA_HART - four-wire User Manual

Page 11

3 Product description

WEIGHTRAC 31 • 4 … 20 mA/HART - four-wire

42374-EN-131119

A handling permit is required for operation of a system using gamma

rays. This permit is issued by the respective government office or the

responsible authority (in Germany, for example, offices for environ-

mental protection, trade supervisory boards, etc.)
You can find further instructions in the operating instructions manual

of the source container.

When handling radioactive substances, unnecessary radiation

exposure must be avoided. An unavoidable radiation exposure must

be kept as low as possible. Take note of the following three important

measures:

Fig. 3: Measures for protection against radioactive radiation
1 Shielding

2 Time

3 Distance

Shielding - Provide good shielding between the radioactive source

and yourself as well as all other persons. Special source containers

(SHLD-1) as well as all materials with high density (e.g. lead, iron,

concrete, etc.) provide effective shielding.
Time - Stay as short a time as possible in radiation exposed areas.
Distance - Your distance to the source should be as large as possi-

ble. The local dose rate of the radiation decreases in proportion to the

inverse square of the distance to the radiation source.

The plant operator must appoint a radiation safety officer with the

necessary expert knowledge. He is responsible that the radiation

protection ordinance is maintained and that all radiation protection

measures are implemented.

Control areas are areas in which the local dose rate exceeds a certain

value. Only persons who undergo official dose monitoring are allowed

into these control areas. You can find the respectively valid limit values

for control areas in the guideline of the respective authority (in Ger-

many, for example, the radiation protection ordinance).
We are at your disposal for further information concerning radiation

protection and regulations in other countries.

Handling permit

General instructions for

radiation protection

Radiation safety officer

Control area