Test Set-up
IMPORTANT
: Test results taken on a TDT Test Block will be different from those taken on an
installed transducer in the water.
Using the TDT1000, a transducer can be tested in one of three ways:
•
Good
: Test the transducer using the TDT Test Block in air.
•
Better
: Test the transducer using the TDT Test Block submerged in water.
Bench testing with the TDT Test Block submerged in a tub of water will produce more
consistent results than testing in air.
•
Best
: Test the transducer installed in a hull with the boat in at least 2m (6') of water.
Using the TDT Test Block
CAUTION
: The Test Block must be clean. To clean the Test Block, use water ONLY.
CAUTION
: Do not store anything on top of the Test Block. It may become permanently deformed.
Always remove the transducer, clean the Test Block, and store it in a safe place.
Good: Test Using the TDT Test Block in Air
The Test Block simulates 1 to 2m (3 to 6') of water.
1. Apply 30 to 40ml. (2 to 3Tbsp.) of water to the center of the testing surface.
2. Gently place the acoustic face of the transducer onto the Test Block.
3. Gently move the transducer from side to side to fully wet its acoustic face.
Be careful not to
agitate the water.
Air bubbles in the water will interfere with transmitting and receiving signals.
Testing an Installed Transducer
The Test Block can be used to test an installed transducer while the boat is out of the water (Figure 1).
1. Wet the surface of the Test Block using a water-based lubricant such as K-Y
®
Jelly.
2. Hold the Test Block firmly against the transducer.
Figure 1. Testing an installed transducer
Copyright© 2020 Airmar Technology Corporation
8