User`s manual

Accurate Technology ProScale Page 10 of 48
Readheads
Absolute
Absolute (ABS) style ReadHeads have “BLACK END OF SCALE” labels on
the housing cover, and the cable exits from the corner of the housing. Care
must be taken not to damage the brass “fingers” inside the ReadHead
housing. ABS style ReadHeads, used in all Model 150 and Model 250
systems, must only be used on ABS Scales and with a particular orientation.
Each ReadHead has an arrow on the label pointing in the direction of the
“BLACK END OF SCALE”.
Each ABS style Scale will have one end
painted black. This relationship is very
important, since the ReadHead may
work, but produce erratic results if
installed backwards. To insure proper
operation, be sure the arrow on the
ReadHead is pointing toward the
BLACK end of the Scale. The standard
ABS ReadHead has a round black (older
systems have flat gray) cable 10 ft. (3m)
long. For special cable lengths, contact
Accurate Technology, Inc. ABS ReadHeads will only work on ABS Scales.
Standard ABS ReadHead is supplied with a 3m (10ft) cable. Custom length
cables are available up to 6m (20ft).
Part #: 701-1500-120 (last 3 digits indicate cable length in inches)
Incremental
Older ProScale M100 and M200 Systems
use Incremental style ReadHeads. These
ReadHeads may not have labels on the
cover, the wire is black or gray and exits
from the center of the ReadHead housing.
Incremental ReadHeads will only work on
incremental Scales.
Standard Incremental ReadHead is supplied with a 300mm (12in) cable.
Part #: 701-1500-N12 (last 3 digits indicate cable length in inches)
All ProScale Model 150 and Model 250 Systems Use Absolute (ABS) parts.
Absolute and Incremental ReadHeads are not interchangeable.