For calibrating you system with the pink noise from your receiver or Avia/DVE, use C weighting, and slow speed.

A Quick Overview of Home Theater Calibration

I have an RS analog meter that is, at least, 25 years old. Seems to be working just fine. It gives me the same readings as my 1 1/2 year old RS digital meter.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton