4.
D. To locate the radio transmitter, you will need to open the front cover of the exterior
case. You will now see the radio transmitter (Figure 1). To change the settings of the
radio transmitter, please go through the procedure in the next section.
E. The black knob at the bottom of the circuit board on the left is the sensitivity con-
trol (Figure 1-5). This can be
used to increase or decrease
the sensitivity of the probe. In
most locations the sensitivity
should be set at the mid point
(12 o’clock). Rotate the knob
clockwise in one hour incre-
ments to increase the sensi-
tivity. Note, do not operate
with the sensitivity knob fully
clockwise, as false signals may
result. Move the knob slightly
off the fully clockwise stop.
Figure 1
5
1
2
3
4
