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The Leica GPM3 parallel plate micrometer provides direct
result readings to 0.1mm and approximated readings to 0.01mm. This makes both
the NA2 and NAK2 into a precise and accurate level for monitoring and
industrial measuring projects or deformation tasks.
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For precise levelling the GPM3 is fitted onto the NA2 or
NAK2 telescope objective and locked in position with the knob.
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By turning the micrometer knob the parallel-sided glass plate is tilted,
thereby causing the line of sight to be raised or lowered. The range of
displacement is 10mm.
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On the scale, seen in the GPM3's eyepiece, the amount of displacement is read
directly to 0.1mm and estimated to 0.01mm.
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10”/2mm tubular level accuracy and with a double run with PPM 0.3mm per 1km.
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