Turning on the entire system - Bridge steps
When all cables have been properly connected, the CS90 can be started. In order to turn on the CS90 for the first time in a controlled manner, two tasks must be done simultaneously. These tasks are done on the bridge.
Prerequisites
The CS90 is installed as specified in this manual.
•  The door on the Transceiver Unit is removed.
•  The door on the Motor Control Unit is open.
You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks.
Context
Certain steps in the two procedures are location specific. The steps marked [Sonar room] are done in the sonar room.
Procedure
1 Make sure that you have sufficient water depth below the keel before you lower the transducer.
2 Turn on the CS90.
a Turn on the display.
b Turn on the Processor Unit.
c On the Operating Panel, press Power, and keep it depressed for a few seconds.
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d Once the program has started, observe that the presentation fills the entire screen.
3 Lower the transducer to its middle position.
a On the Operating Panel, press Middle.
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To indicate transducer movement, the Middle indicator lamp flashes, and an audible signal is sounded. When the middle position has been reached, the indicator lamp is lit, and the audible signal stops.
b [Sonar room] When the transducer shaft stops, make sure this happens at the correct middle position.
4 On the Horizontal menu, set Range to a suitable range.
5 Set Mode to Bow Up.
6 Start "pinging".
a Set Tx Power to Low.
b Verify that echoes appear on the CS90 presentation.
c [Sonar room] Make sure that all the 16 transceiver boards are fully functional.
d [Sonar room] If possible, verify that you can hear the sound of the transmit pulse from the transducer.
e Set Tx Power to Medium.
f Verify that echoes on the CS90 presentation appear stronger.
g [Sonar room] If possible, verify that the sound of the transmit pulse is louder.
h Set Tx Power to Maximum.
i Verify that echoes on the CS90 presentation appear even stronger.
j [Sonar room] If possible, verify that the sound of the transmit pulse is even louder.
7 Set TX Power to Off.
8 On the Operating Panel, press Up.
9 [Sonar room] When the transducer shaft stops, make sure this happens at the correct middle position.
10 Notify the sonar room that the test is finished.
11 [Sonar room] Close the door on the Transceiver Unit.
12 [Sonar room] Close the door on the Motor Control Unit.
13 [Sonar room] Close the Power Supply Unit.
Further requirements
After these tasks, the CS90 is turned on, but it is not transmitting ("pinging"). The transducer is hoisted to its upper position. If you wish to proceed with the setting to work tasks, leave the CS90 in this state. If you wish to proceed later, turn the CS90 off.