599176
118
Zoom out
Zoom in
Previous page
1/132
Next page
116
Troubleshooting
bubbles. (See the Installation Section for how to install the
transducer.)
3. When attaching a transducer to the inside of a hull, ONLY
use epoxy available from LEI (see inside back cover for or-
der information).
4. Do NOT use RTV silicone rubber adhesive or any other type
of epoxy. The LEI epoxy is specially formulated so that it will
cure properly for shoot-through applications.
5. Clean the face of the transducer. Oil, dirt and fuel can cause
a lm to form on the transducer, reducing its effectiveness.
6. Electrical noise from the boat’s motor or trolling motor can
interfere with the sonar. This causes the sonar to automati-
cally increase its discrimination or noise rejection feature.
This can cause the unit to eliminate weaker signals such as
sh and can display lines across the screen.
7. The water may be deeper than the sonar’s ability to nd the
bottom. If the sonar can’t nd the bottom signal while it’s in
the automatic mode, the digital sonar display will ash con-
tinuously. It may change the range to limits far greater than
the water you are in. If this happens, place the unit in the
manual mode, then change the range to a realistic one, (for
example, 0-100 feet) and increase the sensitivity. As you
move into shallower water, a bottom signal should appear.
8. Check the battery voltage. If the voltage drops, the unit’s
transmitter power also drops, reducing its ability to nd the
bottom or targets.
1. This is likely due to cavitation (turbulence) in the water sur-
rounding the transducer. You may need to move the trans-
ducer lower in the water or to another location. The trans-
ducer cannot send or receive signals through air bubbles.
2. Electrical noise from the boat’s motor or trolling motor
can interfere with the sonar. This causes the sonar to
automatically increase its discrimination or noise rejection
feature. This can cause the unit to eliminate weaker signals
such as sh or even structures from the display. Try using
resistor spark plugs or routing the sonar unit’s power and
Bottom echo disappears at high speeds, erratic reading
or weak bottom echo while boat is moving
118


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Lowrance HDS-7m at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Lowrance HDS-7m in the language / languages: English as an attachment in your email.

The manual is 4,53 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Lowrance HDS-7m

Lowrance HDS-7m Quick start guide - English - 6 pages

Lowrance HDS-7m Installation Guide - English - 52 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info