Freiberg
Instruments
GmbH
ּ Am St. Niclas Schacht 13 ּ 09599 Freiberg – Germany
70 / 78
The access to the radiation source, if installed in the
lexsyg
, is limited to authorized
personnel only: To open the housing of the measuring system a key is required. The
radiation module is affixed to the base transport safety plate of the
lexsyg
by four special
screws requiring special tooling to be unfastened.
The radiation source is safely contained within the radiation source module providing
appropriate radiation shielding. The whole system has been designed such that exposure to
operators and lab workers is limited (see section 2). However, radiation surveys are
recommended to be conducted to verify radiation safety at any time.
The source shutter mechanism (see fig. 6) is pneumatically operated and has two stable
positions, i.e., the shutter is either fully closed or fully open. The actual shutter position is
monitored by sensors. In case of complete failure of electrical power and/or pressurized air
supply the shutter will automatically close due to a retracting spring.
Prior to opening the radiation source module or any activities involving the radiation source
module it is mandatory to verify proper shutter position and to conduct a radiation survey.
The measuring chamber can just be lifted by 15 mm from the
lexsyg
base plate. Thus,
inadvertent access to the lower side of the radiation source module by bare hands will be
avoided.
The sample heater is designed to heat up the sample to 700 °C. Under normal operating
conditions the sample will not be heated when being placed under the radiation source. The
source is being designed to withstand a temperature of 800 °C for one hour (classification
C.63211 per ISO 2919). However, there are software and hardware based safety
mechanisms in place to avoid any thermal load on the source.
