5. Place the probe back in its compartment. The probe is still
ready for operation, but no gas leaks out.
If the probe is not used for a longer period of time (e.g.
over night) you just have to close the tap of the gas cylin-
der. If it is opened again, the correct gas flow is set auto-
matically
7.9.5 Tritium Probe with Trolley
The trolley is specifically designed to accommodate all instru-
ments necessary for the measurement of Tritium (LB 134, Triti-
um probe, P10 gas cylinder) and the probe LB 1231 to measure
beta-gamma radiation (β-γ-probe) and allows simple and quick
handling.
Assembly
The trolley with 2 wheels rests firmly on two fixed feet on the
floor. For transportation, simply tilt it back at the handle to
raise the feet and you can pull or push the trolley on its wheels.
The 3-liter P-10 gas cylinder is strapped to the vertical pipe,
starting at the wheel axle and ending in the trolley handle. It al-
so supports the console for the measuring instruments.
The console is equipped with holders for the Tritium probe
(right) and a β - γ probe (optional). At the rear, the probes are
held in place by a black tapered metal bar, at the front by resili-
ent plastic pivots, at the side by metal bars. The compartment
for the Tritium probe includes an opening for the spring switch
of the gas valve. When the probe is inserted, the gas valve is
closed and when the probe is removed, the gas valve opens.
In the center of the console there are two retention cradles, in-
to which the LB 134 is placed and secured by knurled screws.
The rotameter indicating the actual gas flow is installed to the
left of the Tritium probe.
Inserting the Tritium Probe
The Tritium probe has to be inserted correctly to make sure that
the gas flow valve switch is closed.
(a) Take the probe by its handle and with the rear side first put it
onto the console, directly at the black rail. Then push the
front side down along the resilient pivots.
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