Ophir 20C-A-1-Y 1h zeroing test

Now that my LPM is done I decided to do a long zeroing test to see if it's stable.

The test was done on a closed room. I zeroed it as soon as possible (at 11.633mW) and took a 1h graph of the offset from this initial value without shining any laser on the head.



The peaks on the graph are because I touched it or had to open the door/pass in front of it to leave/enter the room.

After 300s (5min) it varied between 1.820 e 2.294 above the initial zero, ignoring the peaks. The amplitude of the variation was 0.474mW, just under the listed noise of 0.5mW.

Conclusion: wait 5min before zeroing your Ophir head

Neat!

Just thought of something that should be added to Peregrine, it should change the scale to minutes after a certain duration.

Noted. That would be a nice feature indeed!