Using The Scale Slider (Ma2-Gr/Ma2-Mr); Grain Scale Slider (Ma2-Gr) - Nikon ECLIPSE MA200 Instructions Manual

3.20

Using the Scale Slider (MA2-GR/MA2-MR)

Attach the MA2-GR/MA2-MR slider to the MA200 main body to measure steel structures or to photograph
images.
3.20.1

Grain scale slider (MA2-GR)

The following two types of scales are provided for a single slider for Austenitic steel measurement.
• Austenitic steel measurement scale (ASTM E112-63 reticle numbers 1 to 8)
Compare the reticle pattern (numbers 1 to 8) with the sample-structure size in order to measure the grain
size. Normally, the 10X objective is used in measuring the grain size. To use the 20X objective, select the
reticle number two scales up, whereas to use the 5X objective, select the reticle number two scales down.
• Lattice scale (0.5 mm intervals; Vertical/Horizontal: 20 each)
The lattice scale is normally used for the Nonmetallic Inclusion test, and it can also be used for simple
lattice-measurement. The lattice, whose intervals on a reticle indicate 0.5 mm, consists of 20 vertical or
horizontal lines. When the 10X objective is used, the lattice intervals equivalent to those on the sample
become 0.05 mm.
Positioning index line
Figure 3.20-1 Grain scale slider
Chapter 3 Operation Details
Austenitic steel
measurement scale
Lattice scale
When inserted, the grain scale slider is pressed down
by a leaf spring installed inside of the slot to adjust
the desired inserting position. To place the scale in
the optical path, use the icons to indicate the current
scale type on the slider and the positioning index line.
53