Page 125 - Mahr马尔量具完整

MarTest | Avoiding Measuring Errors

For accurate measurements the axis of the contact point must be
perpendicular to the measuring direction (fi g. 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 (fi g. 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: 30° (estimated)
Reading on dial: 0.38 mm
Meas. values: 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 MarTest | Metrological Characteristics
of Measuring Direction

Measurement in both directions is possible without switch.
The pointer moves clockwise. This guarantees clear and
errorless reading.

Deviation of reading Nominal value

against the measuring force
in the directions of the measuring force
functional description

MarTest | Versions

Standard Model Extra Long Styli Higher Resolution
800 S 800 SL 800 SM

800 EW 800 EWL
Larger Measuring Range Horizontal Model Vertical Model
800 SR 800 H 800 V

MarTest | Test Indicators and Touch Probes 121