LB 134
7. Probes for the LB 134
108
11. Take the Tritium probe out of the holding device to
open the gas valve and place it on a flat table surface.
12. With the double pressure reducer
closed
, open the P10
gas cylinder.
13. Slowly open the double pressure reducer until the ro-
tameter indicates a level of 200. Keep in mind that it
takes a certain time until the gas has reached the rota-
meter. When using the aperture plate, less gas is
needed, so that the double pressure reducer may be
set to about 100cm³/min.
14. Re-place the probe again in the holding device.
Measurement
15. Turn the LB 134 on. The instrument identifies the con-
nected Tritium probe and sets the measurement mode
accordingly.
16. The instrument is ready for measuring surfaces con-
taminated with Tritium: take the probe out of the holding
device and place it onto the surface being measured.
The measured Tritium activity is indicated on the
LB 134 display. If necessary, run a test measurement
using the appropriate test source.
17. For the measurement of finger tips, place the aperture
plate over the probe. The plate is held by magnets.
When using the aperture plate, the gas flow has to be
reduced and adjusted accordingly.
End of measurement
18. Once the measurement is over, re-place the Tritium
probe correctly in its position (see steps 5. and 6.) to
close the gas valve.
19. Close the P10 gas cylinder if you do not use the probe
for a longer period of time.
Using the
β
-
γ
-probe
On the left side of the trolley console there is space for the
β-γ
probe LB 1231; its connecting cable to the LB 134 is placed in a
holder.
1.
Turn off the LB 134.
2.
Pull out the spiral cable connecting the Tritium probe to the
LB 134.
3.
Insert the spiral cable of the
β-γ-probe into the LB 134
socket.
Summary of Contents for LB 134
Page 2: ......
Page 6: ...LB 134 Content IV...
Page 8: ...LB 134 Working with the User s Manual VI...
Page 10: ...LB 134 Safety Instructions VIII...
Page 34: ...LB 134 2 System Description 24 Figure 2 9 LB 134 with wall bracket...
