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DISTANCES
A Traverse unit measures distance in increments of 0.01" on a scale
graduated
in divisions of 0.1" with a vernier. Standard scale lengths
are 6", 12", 18", 24", 30", 36", 25cm, 50cm, 75cm, 100cm, but other lengths
can be custom manufactured.
Linear movement is resisted by the
friction of flat springs sliding on the
scale, adjustable by a thumb screw
which can be tightened to lock the
probe at any location.
ANGLES
Angle of rotation of the probe, used for measuring flow direction, is
measured in movements of 0.2° over a full 360° on a protractor
graduated
in 2° divisions for easy readability and a special large scale
vernier.
Both
vernier and protractor are friction loaded with adjustable springs
and balls for easy, accurate rotation to any angle. The adjusting
spring
screw can be tightened by a thumb screw or an Allen wrench to lock
the probe at any angle. The vernier is fully adjustable, permitting
the
zero angle point to be set at any time without loosening the probe
in
the Collet and losing the distance setting.
SCALES
The Traverse unit is designed for maximum visibility even under
conditions
of poor lighting and awkward position. Verniers are
designed
to eliminate parallax errors and divisions are spaced widely
enough so the
linear scale can be read accurately to .01". Both scales
are easily
visible from the same point regardless of rotation of the
probe.
The flat surface of the scale provides a convenient reference
surface for
aligning a directional probe with the rig by placing a parallel
between
aligning block and scale. |
