Accurate Technology DigiScale 18 User manual

Models 18 & 28
DigiScale™
User Manual

Manual Part # 800-1404-001, Rev B Page 2 of 36

Accurate Technology DigiScale Models 18 & 28 User Manual Page 3 of 36
WARRANTY
Accurate Technology, Inc. warrants the DigiScale Models 18 & 28 against
defective parts and workmanship for 1 year commencing from the date of
original purchase. Upon notification of a defect, Accurate Technology, Inc.,
shall have the option to repair or replace any defective part. Such services
shall be the customer's sole and exclusive remedy. Expenses incidental to
repair, maintenance, or replacement under warranty, including those for labor
and material, shall be borne by Accurate Technology, Inc. (Including freight
or transportation charges during the first 30 days).
Except as expressly provided in this warranty, Accurate Technology, Inc.
does not make any warranties with respect to the product, either expressed
or implied, including implied warranties of merchantability or fitness for a
particular purpose, except as expressly provided in this agreement.
Accurate Technology, Inc. shall not be liable for any special, incidental, or
consequential damages or for loss, damage or expense directly or indirectly
arising from the customer's use of or inability to use the equipment either
separately or in combination with other equipment, or for personal injury or
loss or destruction of other property, or from any other cause.
To request repair work, (either warranty qualified parts or not) contact
Accurate Technology, Inc. directly by phone, fax, or e-mail. A Returned
Merchandise Authorization (RMA) number is required before returning a
product for repair.
Accurate Technology, Inc.
+1 828.654.7920 800.233.0580 828.654.8824 (F)
www.proscale.com [e-mail]
P/N 800-1404-001, Rev B Copyright © 2010, Accurate Techno ogy, Inc. A rights reserved.
S
SA AF FE ET TY Y W WA AR RN NI IN NG G
Before installing DigiScale on any machinery:
Turn off machine and disconnect power.
S
SA AF FE ET TY Y W WA AR RN NI IN NG G

Manual Part # 800-1404-001, Rev B Page 4 of 36
Table of Contents
SECTION 1 GENERAL INFORMATION................................................. 6
INTRODUCTION........................................................................................... 6
ABOUT THIS MANUAL.................................................................................. 6
SPECIFICATIONS......................................................................................... 6
SPECIFICATIONS......................................................................................... 7
ABOUT DIGISCALE...................................................................................... 8
Scale.................................................................................................... 8
Encoder................................................................................................ 8
Digital Readouts................................................................................... 8
SECTION 2 INSTALLATION.................................................................. 9
MODEL 18................................................................................................. 9
MODEL 28................................................................................................11
FREQUENTLY ASKED QUESTIONS................................................................13
SECTION 3 DIGI READOUT................................................................14
MOUNTING ...............................................................................................14
THE LCD .................................................................................................15
CHANGING THE BATTERIES.........................................................................15
CHANGING THE BATTERIES.........................................................................16
CALIBRATION ............................................................................................16
CIRCUIT BOARD JUMPERS..........................................................................17
OPERATION ..............................................................................................18
Readout Keys......................................................................................18
TIMING........................................................................................................ 18
ON/OFF ....................................................................................................... 18
UNITS KEY ................................................................................................... 18
+AND -KEYS ............................................................................................... 19
DATUM KEY.................................................................................................. 19
Readout Functions...............................................................................19
REVERSE READINGS...................................................................................... 19
INCREMENTAL MEASUREMENTS....................................................................... 20
KEY LOCK ................................................................................................... 21
RESOLUTION................................................................................................ 21
RESTORE READOUT TO FACTORY SETTINGS....................................................... 21
PROGRAMMING .........................................................................................22
Programming Parameters....................................................................23
Pr 1 – Datum Key Value........................................................................... 23
Pr 2 – Reading Direction.......................................................................... 23
Pr 3 – Key Lockout................................................................................... 23
Pr 4 – Resolution ..................................................................................... 23

Accurate Technology DigiScale Models 18 & 28 User Manual Page 5 of 36
SECTION 4 COMPACT READOUT.......................................................24
MOUNTING ...............................................................................................24
Surface Mount Configuration................................................................24
Panel Mount Configuration...................................................................25
THE LCD .................................................................................................26
CHANGING THE BATTERY ...........................................................................26
CALIBRATION ............................................................................................26
CIRCUIT BOARD JUMPERS..........................................................................27
OPERATION ..............................................................................................28
Readout Keys......................................................................................28
TIMING........................................................................................................ 28
IN/MM KEY................................................................................................... 29
+AND -KEYS ............................................................................................... 29
DATUM KEY.................................................................................................. 30
Readout Functions...............................................................................31
REVERSE READINGS...................................................................................... 31
INCREMENTAL MEASUREMENTS....................................................................... 31
KEY LOCK.................................................................................................... 32
RESOLUTION................................................................................................ 32
RESTORE READOUT TO FACTORY SETTINGS....................................................... 32
PROGRAMMING .........................................................................................33
Programming Parameters....................................................................34
Pr 1 – Datum Key Value........................................................................... 34
Pr 2 – Reading Direction.......................................................................... 34
Pr 3 – Key Lockout................................................................................... 34
Pr 4 – Resolution ..................................................................................... 34
ERROR CODES.........................................................................................35

Manual Part # 800-1404-001, Rev B Page 6 of 36
SECTION 1 GENERAL INFORMATION
Introduction
DigiScale is a general purpose linear measuring system It consists of three
major parts: a SCALE, an ENCODER and a DIGITAL READOUT.
DigiScale is an ideal choice for most measuring requirements up to 60 inches
where affordable digital precision (better than a tape measure) is desired.
Because DigiScale shows the exact measurement on its readout, it
eliminates the ambiguity and mistakes involved when reading and
interpreting tape measures, scales & pointer, or shaft encoders.
Because DigiScale is a solid-state electronic device there's very little to wear
out. The encoder and scale are designed to withstand shop dirt, dust, and
other airborne contaminants. With normal care, DigiScale will last for years.
About This Manual
•This manual includes theory and INSTALLATION information for DigiScale
Models 18 & 28 Scales and Encoders.
•This manual includes OPERATION information for the Digi and the
Compact Readouts used with DigiScale systems.
Digi
Readout
Part #
700-1600-D55
With Firmware Version d 2.xxx & higher
(Firmware version is displayed on power-up)
2AA alkaline batteries
Side input
Compact
Readout
Part #
700-1600-710
With Firmware Version b 2.xxx & higher
(Press and hold the DATUM key for 7 seconds to
display the firmware version.)
1 CR123 Lithium battery
Rear input
Surface or panel mount

Accurate Technology DigiScale Models 18 & 28 User Manual Page 7 of 36
Specifications
Measuring Range: *
Model 18 up to 10 inches
Model 28 up to 60 inches
Accuracy:
Model 18 ± .010 inches
Model 28 ± .012 Inches
Readout Resolution .1inch .1mm or
.01inch .01mm or
.001inch .01mm or
1/16, 1/32 or 1/64 inch
Repeatability: .001inch or .01mm
Readout Range: + 999.999 in; + 399 63/64 in; + 9999.99 mm
Operating Power:
Digi Readout 2 AA Alkaline Batteries
Compact Readout 1 CR123 Lithium Battery
Operating Temp: 40 to 110°F
Slew Rate: 60 inches/second
Encoder cable: 72 inch
* MEASUREMENT range is approximately 4 inches shorter than the PHYSICAL
length of the aluminum scale extrusion.

Manual Part # 800-1404-001, Rev B Page 8 of 36
About DigiScale
All DigiScale systems consist of a SCALE (or track), an ENCODER, (or
readhead) and a DIGITAL READOUT (DRO).
Scale
The scale consists of a series of conductive patterns bonded to an aluminum
extrusion. The Model 18 Scale is .765 inches wide and comes in measuring
lengths up to 10 inches long. The Model 28 Scale is 2.02 inches wide and
comes in measuring lengths up to 60 inches.
All Scales are approximately 4 inches longer in their physical length than
their measuring range.
Encoder
The DigiScale encoder contains electronic circuitry that transmits and
receives signals to and from the scale using a patented technology called
inductive coupling. This data is then sent to the digital readout where it can
be displayed in millimeters, inches, or fractions.
Multiple encoders, each connected to a digital readout, may be used on the
same scale simultaneously.
Models 18 & 28 encoders have black
housings with a cable exiting from one
corner. The encoder orientation on the
scale may be reversed to reverse the
direction of the measurement readings,
or they may be reversed through
programming in the digital readout.
All Models 18 & 28 encoders are supplied
with a 6 foot (72 inch) cable.
Digital Readouts
DigiScale Models 18 & 28 can be used with either of two Digital Readouts.
Refer to SECTION 3and SECTION 4of this manual for information about
programming, installation and operation of these readouts.
DigiScale Models 18 & 28

Accurate Technology DigiScale Models 18 & 28 User Manual Page 9 of 36
Connector Link
SECTION 2 INSTALLATION
Model 18
The Model 18 can be used in many different measurement applications, and
with numerous types of equipment. Therefore all installations will be a little
different and it is the responsibility of the user to choose the bolts, screws, or
other mounting hardware that provides a quality installation and optimum
operation in their application.
Determine an appropriate mounting location and position for DigiScale in
your measuring application. Most installations of the Model 18 will hold the
encoder stationary and allow the scale to pass through the encoder during
measurement. If you choose this installation proceed to Step 1.
However, the DigiScale will also operate correctly is the encoder is moved
along the scale during measurements. If you choose this method, proceed
directly to Step 2
Note: Never drill through the colored portion of the scale at any point over
which the encoder will travel.
1. Stationary Encoder installation
Attach one end of the Connector Link to the scale
using the included screw and fasten the other end of
the connector link to the moving part of the measuring
application or machine. Attach the encoder to a fixed
point using three screws or bolts. Insure that the scale
is properly aligned to pass through the encoder with
the direction of motion of the moving part. Be sure
connections are secure or inaccurate readings could
result. Plug the encoder cable into the readout.
E
nd
v
iew
of
Model 18
DigiScale

Manual Part # 800-1404-001, Rev B Page 10 of 36
Guide Clip
2. Stationary Scale installation
If your application is better suited for the scale to be held stationary and
the encoder moved along it during a measurement, you
should use the Guide Clip to capture the encoder and
move it along the scale (see illustration).
Attach the scale to a fixed point in your application
using the included screw. Place the encoder on the
scale. Attach the guide clip to a moving point in your
application such that the slot on the underside of the
clip engages the post on the top of the encoder and
captures it’s movement along the scale. The guide clip
should exert some pressure on the encoder over the
full range of travel as the two move as a single unit.
Insure the scale and encoder are properly aligned as the encoder is
moved (the guide clip will compensate for slight misalignment in the
direction perpendicular to movement). Adjust the scale alignment if
necessary. Plug the encoder cable into the readout.
Refer to the Digital Readout Operation manual that accompanied your
DigiScale.
Encoder stationary, Scale moving
Scale stationary, Encoder moving
Guide Clip
S cale
Encoder
M oving part
Moving Part
Connector Link
Encoder
Scale