The two optical ports (SC/APC) are physically connected in the optical link during testing.
To avoid wearing out the two PON power meter optical connectors, it is highly recommended to use two sacrificial patchcords (SC/APC to SC/APC), to be connected to the PON meter at all time.
Using the video inspection probe to check the connector end face regularly, change the patchcords accordingly.
Using PON power meter to test the SSS drop cable
Using PON power meter to test the Multi-port