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/18

Survey: 

Installed in Lloyd’s Type-approved Tank, CS235

 Depth Transducer

Model: 

M192

Patent http://www.airmar.com/patent.html

Tools & Materials

Safety glasses
Dust mask
Ear protection
Water-based antifouling paint (

mandatory in salt water

)

Cable gland
Junction box
Underwater lubricant such as Aqualube

®

Hex wrench: 8M
Marine sealant

NOTE

: The terms tank and housing are used interchangeably.

Antifouling Paint

Surfaces exposed to salt water 

must

 be coated with antifouling 

paint. Paint the housing with an appropriate antifouling, corrosion 
inhibiting coating. Use only 

water-based

 antifouling paint on the 

radiating face of the transducer. 

Never

 use ketone-based paint on 

the transducer’s face since ketones can attack many plastics 
possibly damaging the transducer. It is easier to apply antifouling 
paint before installation, but allow for sufficient drying time.

Installation

CAUTION

: Do not remove the rubber retaining rings.The 

transducer’s mounting screws utilize rubber retaining rings to hold 
the screws in place during installation.

CAUTION

: Lubricate the screw threads.Lubrication is necessary 

for removing the screws, if the transducer needs to be replaced.

1. Inspect the transducer, cable, and connectors carefully before 

installing. All parts must be clean and free of oil, grease, paint, 
solvents, and other foreign material that may hinder 
performance.

2. Pull the tagged end of the transducer cable (P/N 22-136-01) 

through the housing cable passage and the seamless pipe until 
the cable stop is seated 

firmly

 against the cable passage 

opening (Figure 1). Approximately 305mm (12") of cable will 
remain in the housing with the male connector attached.

3. Use a suitable cable gland at the top of the pipe to support and 

clamp the cable.

4. Secure the free end of the cable in a junction box located in a 

dry, gas free environment within the ship.

5.

Carefully

 push the socket head end of each mounting screw 

into the counterbore of the transducer to fully expose the 
threaded end of the screw. Sparingly apply a uniform coat of 
Aqualube

®

 or other similar underwater lubricant to the screw 

threads.

6. Push the threaded end of each screw back into the transducer 

until approximately 7mm (0.25") of the lubricated threads are 
exposed and held in place by the retaining ring.

7. While supporting the weight of the transducer, plug the mating 

connectors together until they are fully engaged. The connector 
faces 

must

 touch.

8. Slowly rotate the transducer approximately 1 to 2 turns as it is 

raised into the housing to properly dress the cable and joined 
connectors in the cable storage cavity. The transducer face will 
be almost flush with the flange of the housing when the cable is 
properly stowed and the mounting screws are seated in the 
threaded holes of the housing.

Figure 1. Installation

seamless

pipe

tank 

cable

connectors

cable

cable

loop

storage

cavity

stop

transducer

rubber

retaining

ring (3)

mounting

screw (3)

radiating face

counterbore (3)

flange

cable

passage

(housing)

Follow the precautions below for optimal product 

performance and to reduce the risk of property 

damage, personal injury, and/or death.

WARNING

: Always wear safety glasses, a dust 

mask, and ear protection when installing.

CAUTION

: Never pull, carry, or hold the transducer 

by the cable as this may sever internal 

connections.

CAUTION

: Never use solvents. Cleaner, fuel, 

sealant, paint, and other products may contain 

solvents that can damage plastic parts, especially 

the transducer’s face.

IMPORTANT

:

 Please read the instructions 

completely before proceeding with the installation. 

These directions supersede instructions in your 

instrument manual if they differ.

Copyright © 1999 Airmar Technology Corp.

OWNER’S GUIDE      &       INSTALLATION  INSTRUCTIONS

Record the information found on the cable tag for future reference.

Part No._________________Date___________Frequency________kHz

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