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Instruction sheet 554 83
5
Mounting/ demounting the sensor holder
Mounting:
- Remove the target holder.
- Loosen the knurled screw on the sensor arm.
- First insert the bottom guide rail of the sensor holder in the
bottom groove of the sensor arm and then insert the top
guide rail into the top groove until it snaps in.
- Set the desired distance between the target and the sensor
and then fix the sensor holder in position with the corre-
sponding knurled screw.
Demounting:
- Remove the sensor.
- Remove the target holder.
- Loosen the knurled screw on the sensor arm.
- Lift the top guide rail of the sensor holder out of the top groo-
ve of the sensor arm and lower the sensor holder.
Adjusting the sensor arm:
- Loosen the knurled screw on the sensor arm.
- Set the desired distance between the target and the sensor
and then fix the sensor holder in position with the
corresponding knurled screw.
6
Inserting a sensor
- Slide the goniometer to the left in the experiment chamber
as necessary.
- Loosen the knurled screw at the sensor seat.
- Remove the cover cap from the end-window counter, care-
fully insert the counter in the sensor seat from the rear as far
as it will go and then tighten the knurled screw.
- Press the SENSOR key and use the ADJUST knob to check
that the sensor holder can move freely in the angular range
you wish to investigate.
When using the internal rate meter:
- Connect the lead of the counter tube to the socket marked
GM TUBE in the experiment chamber.
When using an external counter:
- Connect the counter tube lead to the socket marked HV
OUT in the experiment chamber and connect the socket HV
IN on the connector panel of the X-ray apparatus to the ex-
ternal counter.
