Environmental inspection of the Transceiver Unit
Satisfactory environmental conditions are important to ensure long and trouble-free operation of the Transceiver Unit. An environmental inspection of the Transceiver Unit is required to verify the quality of the sonar room.
Prerequisites
The MS70 is installed as specified in the MS70 Installation manual. You need the following equipment:
•  Thermometer
•  Hygrometer
Context
The sonar room is the compartment in which the Transceiver Unit and the three Power Supply Units are installed.
Observe the installation shipyard’s procedures for workmanship, installation of physical units, and installation and termination of cables.
Procedure
1 Verify that the compartment ("sonar room") in which the Transceiver Unit is installed is clean and dry.
2 Verify that the ambient temperature in the sonar room meets the environmental specifications.
a Verify that the temperature in the sonar room is controlled using a suitable ventilation system.
Record the type of ventilation system that is installed.
b Verify that the ventilation system has been physically connected to the air outlet at the top of the transceiver cabinet.
c Verify that the temperature in the sonar room is monitored.
d Measure the ambient temperature in the sonar room when the MS70 is switched off.
e 30 minutes after the MS70 has been switched on and put to normal operation:
•  Measure the temperature in front of one of the transceiver cabinet’s air inlets.
During normal operation, the maximum permitted air inlet temperature is +33ºC.
•  Measure the temperature in the transceiver cabinet’s air outlet.
During normal operation, the maximum permitted air outlet temperature is +50ºC.
3 Verify that the relative humidity in the sonar room meets the environmental specifications.
a Measure the relative humidity in the sonar room.
b 30 minutes after the MS70 has been switched on and put to normal operation, measure the relative humidity one more time.
4 Check the sonar room and the MS70 cabinets for corrosive attacks.