Optotest’s measuring cables are certified according to the FOTP171A (A2.2.1) standard; this allows repeat measurements to be carried out.
The HPR series is available with different connectors, which can be found in the datasheet.
There are two different connector ends: the reference end and the source end. The reference end is certified according to the FOTP171A (A2.2.1) standard; the end connected to the source meets the requirements set by PC or APC polishing. This “source end” does not necessarily have to have the same connector as the reference end (hybrid cable).
The measurement connectors have to be checked regularly and replaced if they have scratches or are otherwise damaged.