Simrad SP270 Installationshandbuch PDF herunterladen (Seite 100)

Simrad SP 270

Adjustingi.

the, iddle position switch

Normally, when the transducer is selected to middle position on

the Sonar Control Unit

, only one half of the transducer

face

should be outside the sonar

trunk (see figure 5). The middle

position switch

, which is a magnetic switch, must then be

adjusted according to the

trunk length:

With the Hull

Unit fully

hoisted to upper position

measure the

distance x between the bottom of the

transducer and the trunk end.

See the lower part of figure

~X= mm

Ifit is impossible to measure the

distance x, it can be

calculated

by using the total trunk height D from page 12 in section

Installation procedures

" .

Total

trunk height D =

- Distance flange/transducer bottom =

760 mm

= Distance X

Use the hoistingllowering switch in the

motor control

unit to position the transducer in the

calculated correct

position x + 240 mm (see figure 5).

Loosen the bracket for the middle

p~sition switch and

align the switch relative to the magnet as shown on figure

5. Ifneeded

, spare cable is coiled up behind the bracket.

Fasten the bracket and check that the distance

between

the magnet and the switch is approximately 5-

8 mm.

Check the passing of the middle position switch by using

the hoistingllowering switch.

Use the hoistingllowering switch to hoist the Hull Unit to

its upper position.

Release the motor overload switch S301 by pressing the

red button marked " . This to prevent

unwanted

lowering of the transducer.

160573/A

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