Test And Finish The Installation - Humminbird PiranhaMAX 197c Installation And Operation Manual

5. Test and Finish the Installation

Once you have installed both the control head and the transom transducer, and
have routed all the cables, you must perform a final test before locking the
transducer in place. Testing should be performed with the boat in the water.
1. Press POWER once to turn on the control head. If the unit does not
power up, make sure that the connector is fully plugged into the
terminal slot and that power is available.
2. If all connections are correct and power is available, the control head
will enter Normal operation.
3. If the bottom is visible on-screen with a digital depth readout, the unit
is working properly. Make sure that the boat is in water greater than
2' but less than the depth capability of the unit, and that the
transducer is fully submerged, since the sonar signal cannot pass
through air.
NOTE: The transducer must be submerged in water for reliable transducer detection.
4. If the unit is working properly, gradually increase the boat speed to
test high-speed performance. If the unit functions well at low speeds,
but begins to skip or miss the bottom at higher speeds, the transducer
requires adjustment.
NOTE: Down Imaging provides the maximum detail at slower boat speeds, however
high-speed performance is available in the Down Imaging and traditional sonar views.
5. If you have the correct angle set on the transducer, yet lose a bottom
reading at high speed, adjust the height and the running angle in
small increments to determine the ideal transducer position for your
boat. First, adjust the height in small increments (Figure 23).
NOTE: The deeper the transducer is in the water, the more likely that a rooster tail of
spray will be generated at high speeds, so make sure the transducer is as high as it can
be and still submerged in the water.
If you are still not getting good high speed readings, you may need to disassemble
the transducer mounting assembly and re-position the ratchets (Figures 18a - 18d).
19
Transom Transducer Installation