Installation manual

Introduction
27
851--160117 / B
6.3 Starting up the transmitter
During the following procedure, there must be one person on the
bridge, and onein the sonar room to control if theTransceiver Unit
system works properly. If problems occur in the sonar room, set
the service switch S202 to OFF position (see figure 1).
This procedure is made in duplicate, one for the person on the
bridge (chapter 6.3.1), and one for the person in the sonar room
(chapter 6.3.2). These checking lists have to be used
simultaneously in co-ordination. An asterisk (*) means that this
test or action is made in the ”other end”.
Actions on the sonar control unit
j Start up thesonar by pressing the ON/OFF--HOISTING
button.
* CheckthattheTransceiverUnitstartsup,andthatafter
some seconds the two LEDs at the top of SPB--31 start
blinking (marked COM on figure 12).
j Set the sonar range to 125 meters.
j Check that the depth is sufficient for lowering of the
transducer.
j Lower the transducer to MIDDLE position by giving a
short press on the LOWER button.
Normally the transmitting will not start before the
transducer reaches the middle position. In cases where it is
impossible to lower the transducer, this system can be
overridden in the following way:
- Move the menu cursor below PP FILTER to
CONSTANTS in the extra menu, and push enter.
- Move the cursor to SIMRAD TEST and push enter.
- Move the cursor to TX POWER and push enter.
- Move the cursor to ON and push enter.
In such a case, the sonar trunk must always be air-bleeded.
j Setthe TXPOWER inthe mainmenuto LOW,andcheck
that echoes appear on the display.
* Check that the voltmeter on the HV power unit shows
approx. 20 volt.
* Check that the TX enable LED (TXEN) on the TIB board
startsblinking. ForlocationoftheTXENLED,seefigure
12.
j Set the TX POWER in the main menu to MEDIUM, and
check that the echoes become stronger.