Sampling beer to find out sg

[joiner_8]

I have my juicy ipa brewing just now since last Sunday and was going to sample it this weekend to see how it's progressing, I have a coppers fv with a tap, if I take a sample from the tap will it give the same reading as if I took the lid off and sampled it I am reluctant to remove the lid at the stage

 

[RichardM]

It depends how low your tap is. If it is too low then you may get trub in your sample which will make a difference to your reading. You really shouldn't worry about opening the lid to take a sample.
Whether you use the tap or lift the lid, wait another week before checking the SG

 

[joiner_8]

Its a coopers beer fv so the tap is a good 50mm from the turb