6212C Manual Version 15_22 Rev 07-19.docx
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There are very few surfaces or conditions that would produce such a low value. This should be interpreted as
possible problem with Lasercheck electronics, gross misalignment, or poor cable connections. As a reference,
Lasercheck should return values of several volts for the sum_voltage values on steel or aluminum surfaces that
have been turned, ground or similarly finished.
There are many other materials and surface types that can produce lower values and still be well aligned,
operating and calculating correctly, but 300 mV is minimal under most circumstances. This value depends
somewhat on roughness
–
low voltage is an increasingly greater problem on rough surfaces. For example 300
mV for “sum_voltages” will cause several microinches of “noise” and lack of repeatabili
ty on a 50 microinch
surface and would generally be considered unacceptable performance on this surface. On a 10 microinch
surface, Lasercheck will exhibit less than 0.5 microinches of noise and repeatability with the same 300 mV for
“sum_voltages”, which may be acceptable. The “lv” error should therefore be interpreted as a warning condition
and not necessarily a fatal error condition.
