valve opener in a safe place and use it for transportation or
storage.
2. Using the screws and dowels supplied with the instrument,
install the wall bracket for the detector LB 6359 on a vertical
wall in a convenient height. If you intend to use the monitor
not just for field measurements but also as a semi-stationary
instrument for measurement of the hands, you should install
the wall bracket in a higher position, so that you can easily
place your hand from above onto the measuring area of the
counter tube.
3. Connecting the gas supply
When using P10 gas bottles, first install a double pressure
reducer on the gas bottle; make sure the pressure reducer is
closed. When the instrument is connected to the central P10
gas supply, you need a pressure reducer or a needle valve
which has to be closed during start-up.
4. Slip one end of the supplied PVC hose over the left valve
nozzle of the wall bracket and connect the other end to your
gas source (pressure reducer of gas bottle or central gas
supply system) (see Figure 7.7).
5. Connect the outlet valve with the rotameter.
6. Attach another piece of hose to the rotameter output for the
gas outlet. Its length should not exceed 6 m.
7. Place the hand probe into the wall bracket such that the
measuring area of the detector is facing you and that you
can place your hand from above onto the counter tube. In-
sert the hand probe so far that the valves are pushed into
each other (at the end you have to overcome a slight re-
sistance) until they fit together perfectly (visual check!).
Thus, the self-closing valves on the wall bracket and the de-
tector are firmly connected with each other.
8. Slowly open the gas flow regulator to let the gas flow
through the detector as illustrated in Figure 7.7.
9. Wait for the rotameter to react to the gas flow before in-
creasing the flow rate.
10. Gradually open the regulator so much that you get a flow
rate between 70 and 100 cm³/min (i.e. the indicator on the
rotameter should be between 5 and 10; "10" corresponds to
100 cm³/min). After about 15 minutes the detector is flushed
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