Hirschmann PRS 80, Руководство оператора и сервисное руководство

Страница: 34 / 48

Operator’s Manual PRS 80 34
6.8.2 Accuracy and Test Requirements
Check the angle display by changing the angle of the boom to known angles. The accuracy of the
angle indication shall be within the tolerance of SAE J375, refer to complete SAE standard before
testing.
Accuracy
For Boom Angle Indicating Systems, the indication is to be as follows: For boom angles 65 deg or
more, the indicated angle is to be neither greater than the actual boom angle nor more than 2 deg less
than the actual boom angle. For boom angles less than 65 deg., the indicated angle is to be neither
greater than the actual boom angle nor more than 3 deg less than the actual boom angle.
Test Requirements
For system calibration, three or more test radii or boom angle are to be employed to establish
compliance with the accuracy section above. Test angles are to be as near as practical to the
minimum, mean, and maximum of the operating range.
For periodic calibration checks, two or more boom angles are to be employed.
Level the crane to within 0.5 deg in an area that is clear of obstructions, so that the boom may be
moved from maximum radius/minimum boom angle to the minimum radius/maximum boom angle.
For boom angle indicating systems, the following test procedure or equivalent is used:
At each test position, the boom angle is measured by an adjustable level, protractor, or equivalent
calibrated means and the measurement compared to the boom angle indicator. The adjustable level
or protractor must be positioned on a smooth surface of the boom base section parallel with the
longitudinal centerline.
© Hirschmann PRS80 REV. C 09/26/05 190183_D.DOC