Using The Receiver; Handling; Levels Of Sensitivity; Vu-Meter - Chauvin Arnoux LOCATO 110 Mode D'emploi

USING THE RECEIVER

After having connected the Emitter following one of the methods described,
according to the type of trace to be done, the pulsed current will run in a
cable which may be out of sight under skirting boards, in partitions,... or
may be in a cupboard, but amongst tens of other wires.
With the Receiver the user may now follow the cable run and identify it
throughout its run by means of a dual signal: audio signal (beep) and vu-
meter.
Sighting axis
Coil axis

Handling

Hold the Receiver so that your thumb is naturally
placed on the red sensitivity buttons.
Sensitivity levels
The Receiver has three sensitivity push buttons.
In total 5 levels of sensitivity are available: 3 direct
(marked 1, 3, 5) and 2 intermediate, which are obtained by pressing two
buttons at the same time (marked 2, 4).
Min. sensitivity is on level 1 and Max. sensitivity on level 5.

Vu-meter

The Vu-meter consists of 9 diodes which indicate the intensity of the signal
detected.
Left-hand diode: Min. threshold - shows the receiver is switched on.
Diodes 1 to 7 : Increasing signal intensity
Right-hand diode : Max. threshold - saturation.

Operational test

When a button is pressed the Receiver is powered by its 9 V battery. If the
user is a long way from the circuit to be tested, only a hissing noise will be
heard and only the left-hand light will come on. When the Emitter is
approached, the audio signal gets louder and the vu-meter lights up.
NB : If the sound signal and the vu-meter don't work, the battery must be
changed (See chapter on changing the battery).
Operation
Press button 5 (Max. sensitivity) and hold the Receiver at arms length, in
various directions: you will note that in certain places the audio signal
comes on and the vu-meter lights up.
Now simply continue moving in the direction which gives the strongest
audio signal.
By these means a Max. visual display is obtained (or even saturation:
right-hand diode lit). The approximate position of the circuit (in the axis of
the sight) is found in this way. Now change to a lower sensitivity (4 or 3)
and continue in the same way.
Proceed in this way down to the Min. sensitivity (button 1) for which Max.
deviation of the Vu-meter is sought. The circuit being traced is now in the
line of sight.
This method of use by successive approximations is called the maximum
method. It works in the majority of cases.
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