In article <4j1h3a$q9b@panix3.panix.com>, sokoloff@panix.com (Alex Sokoloff)
writes: [long post about Nikon F2 meter errors deleted]

In checking an F2 meter, try shifting the lens aperture ring and the
camera shutter speed dial over their whole ranges when the ASA has been
set at the smallest value, at a middle value, and at the highest value.
Watch the meter needle for the dreaded "bobble", or tendency to jump.
If it does have a problem here, a cleaning of the internal resistor
by a repair service that specializes in older Nikons may help.
If the meter shows no problem here, check its reading at any ASA
against a meter of known accuracy (set to the same ASA) at low, medium,
and high light levels (use large neutral-color subjects, cover the
camera eyepiece with your eye or hand while metering [to prevent
metering of the light entering through the eyepiece], and be sure to
properly index the F2 meter for the speed of the lens in use). If
resetting the ASA on the F2 is needed for meter agreement, after which
there is agreement at all light levels, leave the ASA ring set at the
new value and loosen the three tiny screws in the knurled part of the
shutter speed knob, and move the freely turning ASA ring to the correct
value, and tighten the three small screws (an easy fix!). If there
is not agreement between the two meters in different light levels,
even with (a single) ASA change on the F2, the meter is non-linear,
which can be corrected with a trim pot under the top cover leatherette
(a confusing operation best left to a proffesional). Be sure that all
of the above is done with cleaned battery contacts, and fresh batteries!
Hope This Helps