sewerin Duophon, Operating Instructions Manual

Page: 34 / 47

32
3.0 The DUOPHON® Receiver
The receiver is switched off when in Position 13.1.
When in Position 13.2 the battery capacity will be checked:
When the pointer is within the tightly blocked range of the scale
(Item 17) the receiver is ready for operation. Otherwise the
batteries have to be exchanged (Refer to paragr. 4.0 „Charging/
Current Supply").
When electro-acoustic water leak detection shall be made the
rotary switch (Item 13) must be in position 13.3 and the bodysound
or the ground microphone (Item 15) as well as the earphones (Item
9) have to be connected to the
DUOPHON® .
By pushing the microphone key (Item 8) the picked-up sound can
be heard and the sound intensity will be displayed on the instrument
(Item 16).
In this operating mode the fine tuning (Item 12) has no function.
When the receiver shall be used for pipe location the rotary switch
(Item 13) must be in position 13.4 and the search coil (Item 15) and
the earphones (Item 9) have to be connected to the
DUOPHON® .
The sound intensity will be displayed on the instrument (Item 16).
The transmitting frequency will be selected with the fine tuning
(Item 12).
In this operating mode the microphone key (Item 8) has no function.
Power carrying cables (50/60 Hz) and cathodically protected
pipes (100 Hz) can be located with the rotary switch in position
13.3. The search coil (Item 15) and the earphones (Item 9) have to
be connected. By pushing the microphone key (Item 8) the signal
can be received.
When required, the sensitivity control (Item 11) and the volume
(Item 14) can be adjusted.