Beta LaserMike EFL User Manual

EFL Operator Guide
Installation
Part No. MAN/EN5103-0076 Page 12 of 34 Revision A (Jan 2014)
Angular Alignment
For best results, the LaserSpeed gauges must be properly aligned to the fiber optic
cable or buffer tube. Using the guides provided should eliminate any errors. When the
fiber optic cable or buffer tube is not properly aligned with the instrument, an error in
the absolute measurement can be introduced. This error is referred to as cosine error.
Three alignment angles are critical. These are shown in the figure below.
Types of Gauge Misalignment
Measured Velocity = Actual Velocity x cos(A) x cos(B)
Error Angle
(Degrees)
0
0.25
0.50
0.75
1.0
2.0
3.0
4.0
5.0
Cosine
1
0.99999
0.99996
0.99991
0.99985
0.99939
0.99863
0.99756
0.99619
Speed and
Length Error (%)
0
-0.001
-0.004
-0.009
-0.015
-0.061
-0.137
-0.244
-0.381
A
Material Movement
Rotation About Optical Axis
- Causes Measurement Error
B
Material Movement
Not perpendicular to Material Motion
- Causes Measurement Error
C
Not perpendicular to material edges
- No measurement error
Material Movement
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Beta LaserMike EFL Specifications

General

Brand	Beta LaserMike
Model	EFL
Category	Measuring Instruments
Language	English