OWS 15 ppm alarm testing (Bilgmon 488). Firstly the alarm limit is increased to 15 ppm and the 3 way overboard valve position can be seen moving. Later vice-versa is done.
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OWS 15 ppm alarm testing (Bilgmon 488). Firstly the alarm limit is increased to 15 ppm and the 3 way overboard valve position can be seen moving. Later vice-versa is done.
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