Airmar M191 User Manual

INSTALLATION INSTRUCTIONSOWNER’S GUIDE &

Portable Survey Transducer

Models: M191, SS510, SS538, SS549

WARNING: Always wear safety goggles and a dust
mask to avoid personal injury.

CAUTION: Never pull, carry, or hold the transducer by
the cable as this may sever internal connections.

17-228-01 rev. 03 10/20/10

CAUTION: Never use solvents. Cleaners, fuel,
sealants, paint, and other products may contain strong
solvents, such as acetone, which attack many
plastics, greatly reducing their strength.

IMPORTANT: Read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.

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

Part No._________________Date___________Frequency________kHz

SS549

SS538

SS510

M191

Applications

• Over-the-side mounting recommended

Tools & Materials

Safety goggles
Dust mask

®

Silicone lubricant or petroleum jelly (Vaseline
Pipe: 1-1/4 - 2" diameter

• long enough to adjust the depth of the transducer below the
water surface

• threaded at each end to match the pipe coupling and elbow

Right-angle pipe elbow (with removable plate)
Pipe coupling(s)
Pipe coupling adaptor:

M191, SS510 1/2" x 14NPS threads

SS538, SS549 3/4" x 14NPS threads
Cable ties (some installations)
Chains or cables or lines
Clamps
Water-based anti-fouling paint (mandatory in salt water)

)

Mounting location

• Locate the transducer at a sturdy support on the side hull near

the center (see Figure 1) This location will minimize noise from
the propeller, bubbles caused by the boat’s travel, and the
effect of heave.

• The transducer must be fully submerged in water and not

subjected to air bubbles or turbulent water flowing under the
face. Mount the transducer 1m (3’) below the water surface.

Installation

1. Apply silicone lubricant or petroleum jelly to the threads of the
pipe at both ends to facilitate disassembly.

2. Twist the right-angle pipe elbow onto the upper end of the pipe.
The elbow will prevent the pipe from dropping off, protect the
cable, and can be used to orient the transducer.

3. With the appropriate pipe coupling adaptor in place, twist the
pipe coupling onto the opposite end of the pipe.

4. Guide the transducer cable through the pipe.

Alternately, after the transducer is attached, attach the cable to
the outside of the pipe using cable ties.

5. Apply silicone lubricant or petroleum jelly to the transducer
stem. Thread the transducer stem into the pipe coupling.

6. Attach chains, cables, or lines to the pipe near the transducer
that will support the pipe from the force of the water when the
boat is underway (see Figure 1).

7. Clamp the pipe to the gunnel. Be sure the pipe and thus the
transducer is perpendicular to the water surface.

RV Hydro Surveyor

Figure 1. Over-the-side installation

Copyright © 2006 - 2010 Airmar Technol ogy Corp.

8. Fasten the chains, cables, or lines as far fore and aft as is
practical. Use sufficient tension to support the pipe when the
boat is underway.

9. Route the cable to the instrument being careful not to tear the
cable jacket. To reduce electrical interference, separate the
transducer cable from other electrical wiring. Coil any excess
cable and secure it in place with cable ties to prevent damage.

10.Refer to the survey recorder owner’s manual to connect the
transducer to the instrument.

Maintenance & Replacement

Anti-fouling Paint

Surfaces exposed to salt water must be coated with anti-fouling
paint. Use water-based anti-fouling paint only. Never use ketone­based paint since ketones can attack many types of plastic
possibly damaging the transducer.

Inspecting the Cable

Periodically inspect connections and connectors for indications of
corrosion. Inspect the cable for kinks, abrasions, and cuts. Repair
any damage using Airmar’s splash-proof Junction Box No. 33-035.

Cleaning

Keep the transducer assembly free of weeds and debris.

Aquatic growth can accumulate rapidly on the transducer’s
surface reducing its performance within weeks. Clean it using a
Scotch-Brite® scour pad and mild household detergent, being
careful to avoid making scratches. In severe cases, lightly wet
sand the surface with fine grade wet/dry paper.

Parts & Transducer Replacement

The information needed to order a replacement transducer is
printed on the cable tag. Do not remove this tag. When ordering,
specify the part number, date, and frequency in kHz. For
convenient reference, record this information on the top of page 1.

Lost, broken, or worn parts should be replaced immediately.
Obtain parts from your instrument manufacturer or marine dealer.

Airmar EMEA Tel: [phone]

(Europe, Middle East, Africa) Fax: [phone]

email: [e-mail]

®

AIRMAR

TECHNOLOGY CORPORATION

2

35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA

www.airmar.com

Copyright © 2006-2010 Airmar Technology Corp. All rights reserved.