Sony ZRD-1 Installation Manual page 24

Precautions when installing the base
. Check that the base is parallel to the floor.
Measuring device: Digital level
Specification: 5/10000 or less
. Do not move the reference base.
Do not hit it strongly when connecting another base.
. When connecting multiple bases, confirm the following.
_ Interval between the bases (Fig.1)
Specification: Equal to the interval of display unit (pitch distance: 403.2 mm) ± 0.2 mm
_ Horizontal precision of upper side and front side between bases (Fig.2)
Measuring device: Digital level or laser rangefinder
Specification: 5/10000 (both upper side and front side)
_ Level difference of base matching surfaces (Fig.3)
Specification: No level difference (rough value: 0.2 mm or less)
Fig.1
Display Display
unit unit
Base
Fig.2
y/L 5/10000
z/L 5/10000
Fig.3
H 0.2 mm
Base
1-14 (E)
Front view
Display Display Display Display
unit unit unit unit
Base
403.2 0.2 mm 403.2 0.2 mm
Front view
L
Top view
L
Front view
H
Base
Display Display Display
unit unit unit
Base
H
Base
ZRD-1/ZRD-2/ZRCT-100/ZRCT-200