
P874E
7 CHECKING SIMRAD EN ONBOARD
Ref. No.
Test point
E101-
23/24
P301- 1/2
J201-1/3
P301 , J301
Potmeter
R325
P/J302-
P30 1-
3/4
P302-
P302-
5/6
Recording
styl us
P401-
P401-
P401-
P401-
13, 14
Waveform/measurement
Mains
Mains
Mains
Resistance dependent on setting of
INTENSITY CONTROL R325
Oohm
60V
~ "
:' I
Ii .
~~ .
'-""IIliil'
I..
JOeY
20V
60V
1BV 1
, Oy
20V
6ms
6ms
3 - 12 m s
3ms
Comments
Visual inspection
Switch off mains.
Measure
resistance of R325 with stylus
off paper
Echo obtained at a depth of
5 metres
Measure between contact bar
and ground
Echo obtained at a depth of
5 metres
Pulse duration dependent upon
range and model of echo sounder.
Pulse duration t~0.
3 or 1.
3 ms
dependent upon range
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