User`s manual

ProScale M150, M250 and all products with General Purpose LCD Digital Displays 10 of 44
Readheads
Absolute
Absolute (ABS) style readheads have “BLACK END OF SCALE” labels on the cover,
and the wire 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 will 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 3m (10 ft.) of cable. For special cable
lengths, contact Accurate Technology, Inc.
Standard ABS Readhead is supplied with a 3m (10ft) cable
OLD Part # 701-1510-001, NEW Part # 701-1500-120
Incremental
Incremental style readheads do not have labels on the
cover, and the wire exits from the center of the housing.
Care must be taken not to damage the brass “fingers”
inside the readhead housing. Incremental readheads
work on incremental scales ONLY. Orientation of
incremental readheads on the scale is not important.
Incremental readheads are still used on some current
Accurate Technology products such as: ProStop, ProKit,
Measuring Kits, ProCaliper, and ProPanel.
Standard Incremental Readhead is supplied with a 300mm (12in) cable
Old Part # 701-1002-002, NEW Part # 701-1500-N12
Avoid making extension cables. If a different cable length is required, contact Accurate
Technology, Inc.
Readheads used on Absolute and Incremental systems should never be mixed.