Table of Contents
Advertisement
DST110 User's Manual
4 Maintenance
4.1 Using the Blanking Plug
To protect the paddlewheel, use the blanking plug when the boat will be kept in salt water for
more than a week, or when the boat is removed from the water, or aquatic growth build-up on
the paddlewheel is suspected due to inaccurate readings from the instrument.
Warning: The O-rings must be intact and well lubricated to make a watertight seal.
1. Inspect the O-rings on the blanking plug (replace if necessary) and lubricate them with
the silicone lubricant supplied or petroleum jelly (Vaseline
2. Remove the insert from the housing by removing the safety wire. Loosen the cap nut.
3. With the blanking plug ready in one and, pull the insert most of the way out. Remove
the insert and rapidly replace it with the blanking plug. With practice, only 250 ml (10
oz.) of water will enter the boat.
4. Screw the cap nut several turns until there is resistance. Continue to tighten the cap nut.
Hand-tighten only. Do not over tighten.
Warning: Always attach the safety wire to prevent the insert from backing out in the
unlikely event that the cap nut fails or is screwed on incorrectly.
5. Reattach the safety wire.
6. Winterizing
After the boat has been hauled for winter storage, remove the blanking
plug/insert to let the water drain away before re-inserting it. This
will prevent any water from freezing around the blanking plug/insert and
possibly cracking it.
4.2 Servicing the Insert
Aquatic growth can accumulate rapidly on the depth transducer's surface and impede or freeze
the paddlewheel's rotation, reducing performance within weeks. Clean the insert with a soft cloth
and mild household detergent. If the fouling is severe, remove the paddlewheel with needle-
Page 12
Figure 7 – Replacing the Paddlewheel and O-rings
®
) (see Figure 7).
Revision 1.3
Advertisement
Table of Contents
