On Jun 24, 9:34*am, Andrew VK3BFA wrote:
On Jun 23, 11:39*am, Jim Wilkins wrote:
...
My VIS level may not be exactly centered. I bought it cheap, broken in
shipping, along with a replacement vial the shipper sent. ...
jsw

Checking the level - measure in one plane, swing the level 180
degrees, should be same reading.

Andrew VK3BFA.

Doing that with a level sensitive to 0.0005" in 10" isn't easy. The
test surface has to be nearly level and finely adjustable, and not
shift when I stand anywhere near it or add the weight of the level..

The vial in those is glued with plaster into a pivoting brass block
with an adjustment screw. The block bottomed out against a plate on
one end, which may be what's supposed to happen. I couldn't keep the
surface plate level enough to check exact centering.

jsw