Mahr - Product Catalog Page 125
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MarTest | Avoiding Measuring Errors For accurate measurements the axis of the contact point must be perpendicular to the measuring direction (fig. 1). If this is not possible, it is necessary to multiply the reading on the dial with a correction factor, which depends on angle α (fig. 2). The correction factor is negligible for angles below 15°. Angle α 15° 30° 45° 60° Corr. factor 0.96 0.87 0.70 0.50 Example: Angle α: Reading on dial: Meas. values: 30° (estimated) 0.38 mm 0.38 x 0.87 = 0.33 mm MarTest 800S l = 14.5 Please use only the provided measuring insert length for the type of device (e.g. 800 S) MarTest 800S l = 41.2 MarTest | Automatic Switch of Measuring Direction MarTest | Metrological Characteristics functional description Deviation of reading Measurement in both directions is possible without switch. The pointer moves clockwise. This guarantees clear and errorless reading. Nominal value against the measuring force in the directions of the measuring force MarTest | Versions Standard Model 800 S Extra Long Styli 800 SL 800 EW Larger Measuring Range 800 SR Higher Resolution 800 SM 800 EWL Horizontal Model 800 H Vertical Model 800 V MarTest | Test Indicators and Touch Probes 121
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