Operating Manual R-Series | Version 2.2 | 15.09.2020
© 2012 by Vogel & Plötscher GmbH & Co. KG Page: 6 / 21
2.3 Calibrating the spirit level
The spirit level must be checked and adjusted as necessary prior to use.
Preliminary remarks
The permissible tolerance for cant measurements is ± 1 mm.
The cant measurement fine adjuster mechanism is optimised for clockwise operation.
Procedure
On a section of track with a maximum cant of 20 mm, position the measuring device and measure the
cant (= 1
st
measurement). Then rotate the measuring device 180° and perform another cant
measurement (= 2
nd
measurement).
If the measurement results are identical with an inverted sign, or if they differ by less than 2 mm, no
adjustment is required.
If the measurement results differ by more than 2 mm, carefully re-adjust the spirit level using the
fixed adjuster screws. A correction of less than half a screw turn is normally enough.
Example
Result of 1st measurement: + 10 mm
Result of 2nd measurement: - 5 mm
Adjust the spirit level by the adjuster screws so that the result of the second measurement indicates a
value of -7.5 mm. Then re-check. The measurement results must then be +7.5 mm and -7.5 mm
respectively. If they are not, repeat the adjustment.
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