Daily Use of the Bridge Manoeuvring System

Preparation and change over. Preparation and change over of the engine for the bridge control should be made in accordance with the instructions issued by the engine builder. The following points should be noted: The pump station for the hydraulic amplifier is started to provide oil pressure in the amplifier.

The automatic stop piston valve must be turned to the "Service" position.

Control Panel.

Check that the test telegraph switches on the mimic diagram are in the "Normal" position.

Check also that the switch in the engine speed test unit is in the "Tacho" position. If this switch is left in the "Test" position, the unit lamp will light up. If a start attempt is made, registration of the engine's turning will not take place and the tacho and repeated start supervision unit (TRS) will register the missing tacho signal, and after 6 sastart blocking and a tacho failure alarm will be initiated. If the control system is not furnished with a TRS Unit, starting air will be admitted until the pressure switch is activated.

The overspeed, slow turning, load program and reversing level switches on the mimic diagram are to be placed in the "On" normal position in order to incorporate these functions.

Check with the aid of incorporated voltmeter that all necessary voltages are present.

Check that the power supply switch is in the "Normal" position. If it is in the "Battery" position, the system will still be able to work, but normal running calls for the switch in the "Normal" position. Remember to press button if a change over from "Battery" to "Normal" becomes necessary.

Examine whether any of the lamps in the signal panel for emergency are lit up. If some are lit, the indicated fault should be remedied.

Check whether the safety panel shows any alarms or any shut- or slow-down channels. The lamps in the panel are extinguished under normal conditions. If an alarm occurs, the lamps will light up strongly. If a channel has been "pushed" out of working order, the lamp will continue to light up weakly provided there is no alarm on the channel. If an alarm occurs on a channel, the lamp will .also light up strongly in this condition.

When these preparations have been carried out the system is ready for automatic control.