RKI Instruments GD-70D Series - Manual (Page 77)

Detection principle
- 77 - GD-70D
The detector has the pyrolysis-particle type sensor, which is a radioisotope-equipped device. It is
examined in accordance with the regulations on "Article 12 - 3 of Act on Prevention of Radiation Disease
Due to Radioisotopes, etc." (Nuclear Safety Technology Center, a certification and registration body), and
certified as a specified designing certification device, which is regarded as a device causing little radiation
damage.
(Certificate Number: 091 )
No registrations have to be made to use a gas detector with the pyrolysis-particle type sensor installed
(as far as it is used in accordance with this operating manual).
When the pyrolysis-particle type sensor is used as a single device, observe the certification conditions
specified in the "Safety Manual".
<Safety Manual> No.4019 4059 2
The pyrolysis-particle type sensor (SS-1923/1924 and SS-1925 Note1)) is a radioisotope-equipped device
which uses radioisotope 37 kBq 241-Am.
This pyrolysis-particle type sensor is certified as a specified designing certification device by Nuclear
Safety Technology Center, a certification and registration body causing little radiation damage.
(SS-1923/1924 : Certificate Number 027, SS-1925 : Certificate Number 091)
When the sensor is used within Japan, no registrations have to be made Note2).
However, because the regulations are applied to the sensor, it must be used in accordance with the
following certification conditions Note3).
• Do not disassemble the sensor Note4).
• The sensor must be installed in our product when it is used. Do not remove it from the product if not
necessary.
• When the sensor is detached from the product and is stored, you must introduce measures to prevent
it from being taken out freely, i.e., putting it into the dedicated box we specify, and keeping it in a
locked room.
• When the sensor is no longer needed, do not dispose of it, but return it to us.
• The sensor must be handled as a L-type package. It must be put into the dedicated box we specify or
integrated into our product which is labeled as a "Radioactive L-type package" when it is transported.
• When the sensor is transported, it must be handled by a transportation company which can handle
L-type packages Note5).
Note 1)
SS-1925 indicates the sensor installed in the pyrolysis-particle type sensor unit SSU-1925.
Note 2) When the sensor is used outside of Japan, observe the regulations of the respective
country.
Note 3) When the sensor is used in a way not in accordance with the certification conditions, a
usage registration must be made to the Minister of Education, Culture, Sports, Science
and Technology.
If you find the sensor which is not controlled properly, please let us know.
Note 4) Do not disassemble the pyrolysis-particle type sensor unit SSU-1925 in which SS-1925 is
installed.
Note 5) L-type packages can be handled by us and service companies we specify.
Web site on the designing certification: http://www.mext.go.jp/
2-7-6 Azusawa Itabashi-ku Tokyo, 174-8744 Japan
TEL 03-3966-1112
RIKEN KEIKI CO., LTD.