Mitutoyo ProScale 950 Series User manual

ProScale
Series 950
User
Manual

Mitutoyo America Corp. - ProScale Series 950 DRO 2 of 34
SAFETY WARNING
Before installing ProScale products, turn off the
machine and disconnect it from its power source to
avoid injury.
SAFETY WARNING
Warranty
Mitutoyo America Corporation Inc., (MAC) warrants this product against defective parts
and workmanship for one year, commencing from the date of original purchase. Upon
notification of a defect, MAC 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 MAC. Freight or transportation charges to MTI shall be paid
by the customer.
Except as expressly provided in this warranty, MAC., does not make any warranties in
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.
MAC 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.
Revision B, P/N 800-1024-002. Copyright

2002, All rights reserved.
ProScale™
General Instruction Manual
Includes: ProScale Model 150 & 250
ProStop
Measurement Table Kits
ProPanel
ProCaliper
Digital Displays

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Table of Contents
SECTION 1 GENERAL INFORMATION................................................................................................................... 4
Introduction ..................................................................................................................................................... 4
ProScale Terminology..................................................................................................................................... 4
Scales ............................................................................................................................................................. 5
Readheads...................................................................................................................................................... 6
Displays........................................................................................................................................................... 7
Replacement Parts.......................................................................................................................................... 7
Product Specifications..................................................................................................................................... 8
SECTION 2 950-404 AND 950-405.................................................................................................................... 9
Installation:...................................................................................................................................................... 9
Calibration:.................................................................................................................................................... 10
Calibration:.................................................................................................................................................... 11
Maintenance:................................................................................................................................................. 11
SECTION 3 950-406 AND 950-407.................................................................................................................. 12
Installation:.................................................................................................................................................... 12
Calibration:.................................................................................................................................................... 15
Maintenance:................................................................................................................................................. 15
SECTION 4 DIGITAL DISPLAY.......................................................................................................................... 16
Display Power............................................................................................................................................ 16
Programming The Display.......................................................................................................................... 16
Position Display Units................................................................................................................................. 18
Measuring Modes....................................................................................................................................... 18
Offset Adjustment....................................................................................................................................... 19
Lock Mode ................................................................................................................................................. 19
Display Hold Mode..................................................................................................................................... 19
Position Monitor Mode................................................................................................................................ 20
Segment Offset Adjustment........................................................................................................................ 20
Sending position to SPC device ................................................................................................................. 21
Jumpers..................................................................................................................................................... 21
Changing the Batteries............................................................................................................................... 22
Mounting the Display.................................................................................................................................. 22
SECTION 5 MISCELLANEOUS .......................................................................................................................... 23
Scales........................................................................................................................................................ 23
Readheads................................................................................................................................................. 23
Frequently Asked Questions ...................................................................................................................... 24
Error Codes & Factory Service................................................................................................................... 25
Communicating With Other Equipment....................................................................................................... 25
Read Head Output ..................................................................................................................................... 25
Abbe Error.................................................................................................................................................. 27
Appendix A................................................................................................................................................. 28
SECTION 6 ACCESSORIES .............................................................................................................................. 31
ProMUX-3 ..................................................................................................................................................... 31
ProMUX-4, ProMUX-8................................................................................................................................... 32
Pro RF........................................................................................................................................................... 33

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SECTION 1 GENERAL INFORMATION
Introduction
ProScale digital measuring systems are affordable precision electronic devices for
making linear measurements with speed and accuracy. ProScale consists of a scale, a
readhead (or encoder) and a digital display. It uses capacitive encoder technology, the
same technology used in digital calipers.
ProScale is ideal for most measuring requirements where high –(<10 μm) –accuracy is
not needed. Because ProScale shows the exact measurement on its display, it
eliminates the guesswork involved in reading and interpreting tape, pointer, or shaft
encoder scales. It is compatible for retrofitting or as original equipment on most
machinery and as a result, machine setup time can be reduced considerably, maximizing
throughput on a machine.
ProScale's measurement mode can be changed to display sixteenths, thirty-seconds,
sixty-fourths, or thousandths of an inch; millimeters or centimeters. In any mode,
ProScale is designed to provide and maintain its accuracy for years.
ProScale is extremely rugged and durable. Unlike optical measurement systems, the
accuracy of capacitive systems is not affected by sawdust or other non-conductive
contaminants. Additionally, power consumption is much less than magnetic or optical
measurement systems.
Because ProScale is a solid-state electronic device there's very little to wear out. The
readhead and scale are designed to withstand shop dirt, dust, and other airborne
contaminants, and the controls are sealed with a protective cover for long life. With
normal care, ProScale will last for years.
ProScale Terminology
All ProScale systems consist of a SCALE, a READHEAD, and a digital DISPLAY.
The SCALE consists of a series of conductive patterns bonded to an aluminum extrusion.
The READHEAD contains a computer chip, which transmits and receives signals to the
scale using capacitive coupling. The received signal is used by the readhead to calculate
it’s position to within 0.005mm. This position data is then sent to the digital DISPLAY,
where it can be displayed in millimeters, centimeters, inches, or sent to an external data
acquisition device.
Absolute technology systems use a robust and sophisticated method to measure
position, resulting in a high immunity to electrical interference and one that does not
forget its position when power is removed.

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Scales
An absolute, (ABS), system measures its actual position by reading a pattern which is
unique at any given location over its length. The maximum length of a ProScale absolute
pattern is 430mm (16.932 in.). The pattern must then repeat itself.
Consider the illustration above to represent a ProScale ABS. There are three absolute
patterns (each pattern is 430mm long), joined together end to end. Within each pattern
the system is totally absolute. However, crossing over a pattern joint now presents the
readhead with information identical to what it read in the previous pattern. At this point
the system must be able to recognize that it has crossed over a pattern joint and
therefore must add or subtract the value of 1 pattern offset - 430mm. In fact, each time
the readhead passes over a pattern joint it must keep track of how many patterns it has
passed, and in which direction. This action is accomplished by the digital display.
What does all this mean? If the readhead remains on the same absolute pattern, it can
have power removed, its position changed and power restored without loss of position
information. However, if power is removed and the readhead passes over a pattern joint,
the transition will not be recognized. When power is restored the system knows its
absolute position on the new pattern, but does not know how many patterns it has
passed, or in which direction!
ProScale displays provide the operator with a method to adjust the pattern offset so the
system displays the correct reading at all times without loss of accuracy. See Section 4
All ABS scales have a “zigzag” pattern etched onto the green laminate. Take care to not
damage this etching or remove the green coating. There should also be a pattern
“break” approximately every 430mm (17in.). Do not attempt to shorten ABS style
scales; call Accurate Technology 800-233-0580 for assistance.
All 950-404 & 405 Series scales should be mounted to machinery using the supplied M5
(or 10-32) machine screw and Connector Link. This Connector Link is specially designed
to flex slightly if there is any mechanical binding in the readhead-to-scale mounting.
The Connector Link should always be mounted in the same direction as the scale (see
the diagram Section 2). Warranty is void if the Connector Link is not used.
All 950-406 & 407 scales are designed to be mounted on machinery using M4 (or 6-32)
Flathead screws. MAC provides a Guide Clip to attach the readhead to a moving part of
a machine, see the diagram in Section 3 Warranty is void if the Guide Clip is not used.

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ABS Style Pattern
Readheads
ABS readheads have “BLACK END OF SCALE” labels on the cover, and the wire exits
from the corner of the housing. Extreme care must be taken not to damage the six brass
“fingers” inside the readhead housing. ABS style readheads, used in all 950 Series
systems, must be mounted on ABS scales 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 incorrectly installed.
To insure proper operation, be sure the arrow on the readhead is pointing toward the
BLACK end of the scale. The standard readhead has 2m (10 ft.) of cable. For special
cable lengths, contact MAC.
ABS Readhead
ABS Scale

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Displays
Refer to Section 4 - Digital Displays - for installation, programming and operation.
General Purpose LCD Display
(Replaces all previous displays)
Replacement Parts
Part
Part Number
950-404 Scale only
700-1510-001
950-405 Scale only
700-1518-001
950-406 Scale only
700-2504-001
950-407 Scale only
700-2508-001
950-404 & 405 Flex link
100-1025-001
950-406 & 407 Guide clip
100-1026-001
Instruction Manual
800-1024-002
Digital Display
701-1006-001
Read head
701-1003-001

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Product Specifications
Measuring Range:
950-404 Up to 250mm (10in)
950-405 Up to 450mm (18in)
950-406 Up to 1200mm (4ft)
950-407 Up to 2400mm (8ft)
Accuracy: + .165mm/m to + .20mm max error @ 2 meters
+ .002in/ft to + .008in max error @ 8 feet
Repeatability: .01mm or .001in
Display Range: + 9999.99 mm; + 999.999 cm; + 394.000 in; + 99 63/64 in.
Operating Temp: 0 to 51

C, 32 to 120

F
Power: 2 AA Batteries
Temp Coef: 25ppm/1°C (i.e. .06mm / over 2.5m / 10° C)
Max. Slew Rate: 450 mm/sec. (18 inches/sec.)
Input Format: Mitutoyo SPC (mm only)
Output Format: Mitutoyo SPC (mm or inch)
Readhead: 2m, 10-conductor Mitutoyo 936937 termination
Dimensions: See Appendix A
US Patents: 4420754, 4879508, 4878013, 4959615
Warranty: One year from date of purchase.
All ProScale products are MADE IN USA

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SECTION 2 950-404 AND 950-405
ProScale 950- 404 and 950-405
General Purpose system with standard measuring ranges of 250mm and 450mm.
950-404/405 systems use ABS style scales, ABS style readheads, and general-purpose
digital displays. Neither the scale nor readhead are compatible with other MAC ProScale
incremental systems.
ProScale is easy to install. By following the basics of good installation in this section,
reliable, error-free operation is assured. Because ProScale can be installed on many
different types and brands of equipment, all installations will be a little different.
Therefore, it's the responsibility of the installer to choose the bolts, screws, or other
mounting hardware that guarantee proper installation for optimum operation.
Installation:
1. Note the orientation of the readhead on the scale. Be sure the arrow on the readhead
points towards the “BLACK END OF SCALE”. This orientation is critical for proper
operation of ProScale. Be sure the mounting location for the readhead and scale will
allow this orientation.
2. Determine an appropriate mounting location for the system. The readhead should be
mounted to a stationary part of the machine. The scale should be mounted to the
moving part of the machine with the connector link. Be sure to allow sufficient space
to accommodate the connector link, which is used to mount the scale to the moving
part of the machine. The Display should be mounted in a location which allows for
easy viewing by the machine operator. The location of the parts should also
safeguard the cable from possible damage. All ProScale wiring should be kept as far
away as possible from the machine’s wiring and motors and dust collection systems.
Avoid running the readhead wiring parallel to high voltage/current wiring.

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Connector Link
3. Mount the readhead using three screws or bolts. It may be necessary to use washers
or spacers to ensure a good mount (if the readhead is to be mounted on an uneven
surface).
4. Check that the scale is properly aligned with the direction of motion of the moving part.
The connector link will compensate for only a small amount of
misalignment. The connector link must be mounted in the
same direction as the scale (as in the figure below).
Note: Failure to use the connector link will void the
warranty.
5. Mount one end of the connector link to the scale using an M5
(or 10-32) screw and the other end to the moving part of the
machine. Check that both connections are secure;
inaccurate/erratic readings may otherwise occur.
6. Plug the readhead into the display. See Section 4 regarding
mounting and use of different display versions.
MOVING PART OF MACHINE
DISPLAY
CONNECTOR LINK
MOVEMENT
A Typical Model 950-404 Installation
READHEAD

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Calibration:
Once installed, ProScale can be calibrated easily and quickly. Following is an example
for calibrating ProScale on an industrial sander. Other installations follow the same
general procedure.
1. Check to be sure installation of all parts is complete, all fasteners are secure, and the
display is plugged in.
2. Set the machine to operate as normal. Run a part through the sander.
3. Measure the thickness of the sanded part with the most precise measuring tool
available (digital calipers if possible).
4. Press the zero key on the ProScale digital display.
Note:If the direction of movement and the direction shown on the digital display are
opposite, the programming should be changed. See Section 4 Digital Displays for
more information.
5. Press and hold the PLUS key to scroll until the thickness measurement is displayed
(the longer the PLUS key is held down, the faster the display will scroll).
6. When the proper reading is reached, lock the display if desired. This prevents
accidentally re-zeroing of the display. See Section 4 for more information about how
to lock the display.
7. Re-calibrate, if necessary, after changing sanding belts (or applicable tooling).
8. Calibration is not necessary after batteries are changed.
Maintenance:
The aluminum scale should be cleaned of debris often. This will prevent premature
damage to the scale or readhead. Should the scale become difficult to move, check that
it is thoroughly cleaned. Find and remove any burrs, which may have developed on the
aluminum scale. Do not use any liquid lubricants on the scale assembly, as this may:
1. Impede the readhead's ability to operate properly.
2. Attract other contaminants to the scale.
The Digital Display should be cleaned periodically with compressed air to remove any
dust on the lens and keys. All mounting fasteners should be checked occasionally for
tightness.

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SECTION 3 950-406AND 950-407
ProScale 950-406 and 407
General Purpose system with standard measuring ranges of 1.2m and 2.4m.
950-406/407 systems use ABS style scales, ABS style readheads, and general-purpose
digital displays. Neither the scale nor readhead are compatible with other MAC ProScale
incremental systems
ProScale is easy to install. By following the basics of good installation in this section,
reliable, error-free operation is assured. Because ProScale can be installed on many
different types and brands of equipment, all installations will be a little different, therefore
it's the responsibility of the installer to choose the bolts, screws, or other mounting
hardware that guarantee proper installation for optimum operation.
Installation:
1. Note the orientation of the readhead on the scale. Be sure the arrow on the readhead
points towards the “BLACK END OF SCALE”. This orientation is critical for proper
operation of ProScale. Check to be sure the mounting location for the system will
allow this orientation.
2. Determine an appropriate mounting location for the system. The scale should be
mounted to a stationary part of the machine. The readhead slides along the scale,
using the supplied guide clip to transfer machine movement to readhead movement.
The Display should be mounted in a location which allows for easy viewing by the
machine operator. The location of the parts should also safeguard the cable from
possible damage. All ProScale wiring should be kept as far away as possible from the
machine’s wiring and motors. Avoid running the readhead wiring parallel to high
voltage/current wiring or dust collection systems.

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Guide Clip
3. Mount the scale using M4 (or #6) screws. It may be necessary to use washers or
spacers to ensure a good mount if the scale is to be mounted on an uneven surface.
Be sure the screw heads do not protrude above the surface of the extrusion. If they
do, they will interfere with the readhead.
a. Check that the scale is properly aligned with the direction of
motion of the moving part (any error in alignment will be
magnified by the digital components, and could cause
premature failure). Adjust the scale alignment if necessary.
4. Referring to the figure, note these two installation requirements:
a. For accurate measurements, the guide clip should be mounted
perpendicular to the direction of travel of the readhead.
b. Over the full range of travel, the guide clip should exert some
pressure on the readhead so the two move as a single unit.
Note:Failure to use the guide clip will void the warranty.
Reinstall the readhead if it has been removed from the scale.
Care should be taken to not damage the readhead’s sensitive internal ground fingers.
Also note the orientation label on the readhead housing. Carefully slide the readhead
onto the scale, checking for the proper orientation.
Guide
Clip
Scale
Cable
Readhead
Moving
part of
machine
Typical 950-406 Installation

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5. Slide the readhead until it meets and engages with the guide clip. Check that the
guide clip exerts sufficient pressure on the readhead, as seen in the figure above.
6. Place the cable in a secure position. If necessary, fasten it with a wire tie or other
fastening device. Do not leave the cable where it could be damaged or pulled from
the readhead. If the application requires over twenty feet of cable, the display may
need to be modified for proper operation. Also, if the application requires a shorter
scale, please call Accurate Technology for assistance.
7. Plug the readhead into the display. See Section 4 regarding mounting and use of
different display versions.
Note:If any other mounting method is used, observe the following:
a. Do not drill through the green portion of the scale at any point over which the
readhead will travel.
b. Do not mount the scale so the mounting hardware interferes with the movement of
the readhead.
Readhead
950-406 Scale
33.0mm (1.3")
21.2mm
(.83")
Guide Clip
Guide Clip Pressure/Spacing
(End View)

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Calibration:
Once installed, ProScale can be calibrated easily and quickly. Following is an example
for calibrating ProScale on a table saw fence. Other installations follow the same general
procedure.
1. Check to be sure installation of all parts is complete, all fasteners are secure, and the
display is plugged in.
2. Cut a part using the normal fence operation.
3. Measure the length of the part with the most precise measuring tool available (i.e.
digital calipers).
4. Press the zero key on the ProScale digital display.
Note:If the direction of movement and the direction shown on the digital display are
opposite, the programming should be changed. See Section 4 Digital Displays for
more information.
5. Press and hold the PLUS key to scroll until the length measurement is displayed (the
longer the PLUS key is held down, the faster the display will scroll).
6. When the proper reading is reached, lock the display if desired. This prevents
accidentally re-zeroing of the display. See Section 4 for more information about how
to lock the display.
7. Re-calibrate, if necessary, after changing saw blades (or applicable tooling).
8. Calibration is not necessary after batteries are changed.
Maintenance:
The aluminum scale should be cleaned of debris often. This will prevent premature
damage to the scale or readhead. Should the readhead assembly become difficult to
move, check that the scale is thoroughly cleaned. Find and remove any burrs, which
may have developed on the aluminum scale. Do not use any liquid lubricants on the
scale assembly, as this may:
1. Impede the readhead's ability to operate properly.
2. Attract other contaminants to the scale.
The Digital Display should be cleaned periodically with compressed air to remove any
dust on the lens and keys. All mounting fasteners should occasionally be checked for
tightness. If there is any wear on the green laminate of the scale, the guide clip pressure
on the readhead should be reduced. If wear continues, the readhead bearing should be
replaced. Call Mitutoyo America for assistance.

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SECTION 4 DIGITAL DISPLAY
Display Power
Momentarily pressing the On/Off key will cause the unit to turn the display on or off.
While on, if no key presses or positional changes occur for more than 15 minutes, the
ProScale will automatically turn itself off to conserve battery life. While off, if a position
change is detected or the On/Off button is pressed, the display will automatically turn
itself on.
Programming The Display
To customize the General Purpose Digital Display, several functions of the display are
user programmable. The following instructions describe how to change the system’s
factory defaults.
To enter programming mode, press and hold the MODE key and momentarily press the 0
key. Release the MODE key.
The display shows the current parameter ID in the format: Pr x where x represents the
parameter number. After approximately 1 second, the display will change to show the
current value of the parameter. Use the + or –keys to change the value. Binary (0 or 1)
values can be toggled to opposite values by pressing either the + or –keys. Other
values are incremented with the + key or decremented with the –key.
Pressing and holding the MODE key will show the currently selected parameter number
without moving to the next parameter. Releasing the MODE key will again display the
parameter value.
Momentarily pressing the MODE key will move to the next parameter, displaying the
parameter ID for 1 second and then the parameter value. Successive momentary

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presses of the MODE key will quickly migrate down the parameter list without displaying
each parameter value. When the desired parameter is reached and the MODE key is no
longer depressed, the parameter value will then be displayed. When the end of the
parameter list is reached, the display will loop back to parameter 0.
To exit programming mode, press and hold the MODE key then momentarily press the 0
key. Release the MODE key.
The following parameters are available for programming. Values within { } reflect the
available range of values that can be programmed for an entry.
Factory defaults are shown in bold
Pr0 –Encoder Direction {0,1}
Changes the Display readings from Positive to Negative or visa-versa.
Pr1 –Enable/Disable Long Scales {0, 1}
0=Model 950-404 Only
1=Segment offsets enabled for scales longer than 430mm
Pr2 –Enable/Disable Offset Change {0,1}
0=Disallows Zero, + and –keys to zero reading, increment/decrement readings
1=Allows Zero, + and –keys to zero reading, increment/decrement readings
Pr3 –Aux Keypad Key Enable {0..7}
ABS/INC Button = 1
Monitor Button = 2
Hold Button = 4
To enable buttons, add up combination of button values. Store sum in Pr3. A
value of 0 disables all three buttons. A value of 7 enables all 3 buttons.
Pr4 –Future Enhancement DO NOT CHANGE {0..63}
Pr5 –Future Enhancement DO NOT CHANGE {0..31}
Groups individual ProScale displays to a common “cell”. Allows various cells of
Pr6 –Future Enhancement DO NOT CHANGE {0, 1}
Pr7 –Display Resolution {0, 1, or 2}
Sets the displayed resolution in decimal mode.
0 = Reduced resolution. Inch = xxx.xx MM = xx.x
1 = Normal resolution. Inch = xxx.xxx MM = xx.xx
2 = Increased resolution (Inch only). Inch = xx.xxxx MM = xx.xx
Pr8 –Metric Display Mode {0, 1}
Controls whether the position is displayed in millimeters or centimeters when the
metric display mode is selected.
0 = millimeters
1 = centimeters

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Pr9 –Scaling Factor {.001 .. 99.999}
Applies a scaling factor to the encoder position with the result being displayed as
the current position. Scaling factor values less than 1.000 result in displayed
positions less than the actual position. Values greater than 1.000 result in
displayed position greater than the actual position. Pressing the 0 key restores the
default value of 1.000 (No Scaling).
PrA –Drift Tolerance {.03 .. } mm, {.001 ..} inch
Defines a tolerance of motion allowed (+/-) while the ProScale is in Monitor mode.
This tolerance value is automatically converted to the appropriate units based on
the currently selected display units. Default =. 01in.
PrB –Disable Fractions/Inches {0, 1, 2}
0 = Allows the display to show all measurement modes (decimal inch, fractional
inch, millimeters and centimeters)
1 = Inhibits the display of fractional inches. Only decimal inches and metric units
can be displayed.
2 = Displays Only metric units. No inch display of any kind.
Position Display Units
The ProScale measurement system can display position information in decimal inches,
fractional inches or millimeters/centimeters. To change the current display mode,
momentarily press the Mode key. With each key activation, the unit will cycle from
decimal inches to fractional inches (1/16), (1/32), (1/64) and then to
millimeters/centimeters. Pressing the Mode key again returns the unit to decimal inches.
When the display is in a “fraction” mode, each bar in the display's upper right corner
represents an additional 1/64th of an inch.
Measuring Modes
The ProScale display has two measurement modes. One is referred to as Absolute
(ABS) and the other is Incremental (INC). The Absolute measurement system is
designed to allow the user to set a current position on the display referenced from a fixed
position such as a saw blade, fence or stop. The Incremental measurement system is
designed to take distance measurements from one arbitrary point to another. Both
systems operate independently allowing separate positions offsets to be programmed.
Absolute (ABS) Mode –The ProScale automatically enters ABS mode when power is first
applied. This is indicated by the ABS symbol in the upper left corner of the display.
While in the ABS mode, all position measurements are related to the current system
reference (i.e. saw, fence, etc.) To enter the INC mode, momentarily press the ABS/INC
button.

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Incremental (INC) Mode –While in the INC mode, the INC symbol is shown in the upper
left corner of the display. When the INC mode is initially entered, the displayed position
will change to reflect a new reference point from the current position of the readhead.
This is typically a position of 0 but may be changed by using the + or - keys to provide a
distance offset. This offset may be used to compensate for the kerf of a saw or other
requirements. Moving the readhead in either direction will display the distance moved
from the initial starting point. To complete another incremental measurement from the
new current position, momentarily press the ABS/INC key. The display will again change
to either 0 or the previously programmed offset. To return to the ABS mode, press and
hold the ABS/INC key for approximately 3 seconds.
Offset Adjustment
Use the +, - and 0 keys to change the currently displayed position to a different value.
The zero key forces the unit to display 0. Momentarily depressing the + key increments
the current position by one unit (.001” or .01mm). Momentarily depressing the – key
decrements the current position by one unit. Pressing and holding the + or –keys will
cause the displayed position to change continuously. Continued holding of the key will
cause the amount of change to increase from 1 unit to 10 units, then 100 units, etc. This
allows for quick adjustments over a range of large values.
Lock Mode
The user can “lock-out” the position offset adjustment functions (+, -, 0 keys) to prevent
accidental changes of the current displayed position. To activate the lock mode, press
and hold the On/Off key and then momentarily press the Mode key. The LOCK symbol
on the LCD display will turn on and off with each key operation. When the LOCK symbol
is displayed, the +, - and 0 keys will not change the displayed position. ABS
and INC modes have independent lock operations. That is to say that the ABS mode can
be locked and the INC mode can be unlocked.
Display Hold Mode
The ProScale unit provides a feature that allows the displayed position to be “frozen” in
time while the readhead is moved from its initial position. This allows measurements to
be captured on the display and held for later viewing regardless of the current readhead
position. To activate the Hold mode, momentarily press the Hold key. The HOLD symbol
will be shown in the upper left corner of the display. The currently displayed position will
be frozen from this point. To release the hold feature, momentarily press the Hold key
again.

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Position Monitor Mode
The ProScale display has the ability to monitor a preset position to detect position drift
caused by machine vibration or other factors. To activate the monitoring mode, position
the readhead to the desired location and momentarily press the MON key. The ABS
symbol will flash on the display to indicate that the position monitor mode is active.
If the readhead is moved outside the programmed tolerance (programming parameter A),
the displayed position will also flash indicating a drift condition. When the readhead is
moved back within the programmed tolerance, the displayed position will stop flashing.
To exit the position monitor mode, momentarily press the MON key. This can be done
regardless of whether the display is indicating a drift condition. The ABS symbol will stop
flashing and if the position was previously drifted, the currently displayed position will also
stop flashing.
NOTE: Position monitor mode can only be activated while in the ABS measuring mode.
If the ABS/INC key is depressed while monitoring, the position-monitoring mode is
automatically exited.
Segment Offset Adjustment
ProScale encoder scales that are shorter than 17 inches are designed with an absolute
measurement encoder pattern such that the readhead can calculate its position directly
from this pattern. For encoder scales that are longer than 17 inches, multiple encoder
pattern segments are installed end-to-end on the aluminum scale extrusion. This
provides a pseudo-absolute measurement capability in which the readhead can calculate
its position on any individual encoder scale segment but cannot determine which encoder
segment it is on. To solve this problem, the ProScale display tracks which encoder scale
segment the readhead is on by detecting the readhead crossing from one encoder
segment to encoder segment.
In certain situations, the crossing from one segment to another may not be detected by
the display. This may occur if the readhead is disconnected from the display and then
moved along the scale to another encoder segment. It may also occur if the readhead is
moved too quickly between two encoder segments.
If the encoder segment tracking count is incorrect because of one of the above situations,
the user can re-adjust the display to correct the error. This modification is referred to as
the Segment Offset Adjustment.
To add the distance of one encoder segment, to the display, press and hold the Mode
key and then momentarily press the + key. The displayed position will increase by
16.932 inches.