Mahr umaxum II User manual

Instruction Manual
Digital Indicator
Document Part No. 2249001 Rev. C

2
These instructions cover the following µMaxµm II Digital Indicators:
µMaxµm®II Standard Model
NOTE: Features available for the Standard Version are noted with this symbol “[S]” where
applicable throughout this manual. Advanced features are not included.
Range = ± 0.040 in / ± 1.0 mm
For model number ordering assistance see the product catalog or call:
1-800-343-2050
Part Description Stem Diameter Stem Length
2034101 Standard Version 0.375in 0.46in
2034103 Standard Version 0.375in 1.5in
2034105 Standard Version 8mm 11.68mm
2034107 Standard Version 8mm 38.1mm

3
µMaxµm®II Advanced Model
Range = ± 0.040 in / ± 1.0 mm
For model number ordering assistance see the product catalog or call:
1-800-343-2050
Part Description Stem Diameter Stem Length
2034201 Advanced Version 0.375in 0.46in
2034203 Advanced Version 0.375in 1.5in
2034205 Advanced Version 8mm 11.68mm
2034207 Advanced Version 8mm 38.1mm
2034401 Advanced
Perpendicular 0.375in 0.46in

4
CONTENTS
µMaxµm II Standard Model ................................................................................ 2
µMaxµm II Advanced Model .............................................................................. 3
1.0 Precautions and General Information .............................................................. 7
2.0 Product Features ................................................................................................ 7
2.1 Hardware Display ........................................................................................... 7
2.2 Control Features ............................................................................................. 8
2.3 Setup Features ............................................................................................... 9
2.4 Special Options Available in µMaxµm II Indicators ...................................... 11
3.0 Inspection ......................................................................................................... 13
4.0 Mounting Gage for Setup ................................................................................ 13
5.0 Setup Mode ....................................................................................................... 14
5.1 Changing Measurement Direction (M1) [S] .................................................. 16
5.2 Changing Analog Magnification (M1) [S] ...................................................... 17
5.3 Entering a Preset (M2) [S] ............................................................................ 18
5.4 Entering Tolerances (M12, M23) [S] ............................................................ 20
5.5 Changing Digital Resolution (M13) [S] ......................................................... 22
5.6 Multiplier Entry (M3) ..................................................................................... 23
5.7 Changing Operation to Difference Mode (M1 X1) ........................................ 24
5.8 Changing to Dynamic Max, Min or TIR Operation (M2 X1) .......................... 26
5.9 Changing Dynamic Hold Operation (M2 X1) ................................................ 27
5.10 Changing Data Output Configuration (M3 X1) ........................................... 28
5.11 Calibration Mode (M123) [S] ...................................................................... 30
6.0 User Operation ................................................................................................ 32
6.1 Measurement Direction [S] ........................................................................... 32

5
6.2 Analog Magnification [S] ............................................................................... 33
6.3 Preset [S] ...................................................................................................... 34
6.4 Tolerances [S] .............................................................................................. 34
6.4.1 Analog Bargraph Operation [S] ........................................................... 35
6.4.2 Digital GO/NOGO operation [S] .......................................................... 35
6.5 Resolution [S] ............................................................................................... 36
6.6 Multiplier ....................................................................................................... 36
6.7 Difference Mode ........................................................................................... 37
6.7.1 Dynamic Max, Min, TIR ....................................................................... 39
6.8 Hold Function ............................................................................................... 40
6.9 Display Messages ........................................................................................ 40
6.9.1 Battery Low Signal .............................................................................. 40
6.9.2 Lockout ................................................................................................ 41
7.0 Maintenance ..................................................................................................... 41
7.1 Spindle Maintenance .................................................................................... 41
7.2 Changing the Battery .................................................................................... 41
7.3 Data Output .................................................................................................. 44
8.0 Parts and Service ............................................................................................ 50
8.1 Replacement Parts ....................................................................................... 51
8.1.1 µMaxµm II ........................................................................................... 52
8.2 Accessories .................................................................................................. 54
9.0 Specifications - µMaxµm II ............................................................................. 56
10.0 Special Options ................................................................................................ 57
10.1 Program Codes .......................................................................................... 57
10.2 Lockout Password ...................................................................................... 58

6
11.0 Quick User Flow Chart ..................................................................................... 60
11.1 Measuring Mode Flow Chart ...................................................................... 60
11.2 Setup Mode Flow Chart .............................................................................. 61
[C] 1861 [S] 1918

7
1.0 Precautions and General Information
All µMaxµm II Series Models:
µMaxµm II (Micro-Maxum) Series Models are ruggedly built to withstand hard use, and
their gasketed case, crystal and stem assemblies resist encroachment by most fluids.
However, µMaxµm II Series Models should never be immersed. Regularly inspect all
seals to guard against fluid penetration.
NOTE: To prevent contaminate from entering the 4-pin digital output connector, the output
cover should always be firmly in place whenever an output cable is not connected.
All µMaxumII style indicators are covered in this manual.
2.0 Product Features
2.1 Hardware Display
Rotating Bezel
Allows rotation through 270° for ease of reading.
Power Management
The μMaxum II also makes use of an auto power down feature. If it senses 15 minutes of
inactivity (i.e. no spindle movement, no buttons pushed, and no data output requests), the
unit will turn itself off.

8
Range Signal
Notifies an “off-scale” condition when the digital range is exceeded. The digital display will
turn off and the analog left or right arrow will be left on.
2.2 Control Features
Makes use of three push buttons (inch/mm, M/OFF, ZERO/ON).
NOTE: If the unit is configured with a lockout feature, it will prompt the operator for a fac-
tory set password.
inch/mm (Hold)
Normal Operation [S]: Allows the selection of inch or metric display any time a reading is
present.
Dynamic Operation : Toggles between hold and resume of the displayed reading.
M/OFF (Data)
Normal Operation [S]: Used to turn the unit “OFF”, send data, and for entering Setup
Mode.The M/OFF button must be held down for a minimum of 3 seconds to turn the unit
“OFF”. A quick press sends the displayed reading to the Output Port.
Dynamic Operation: Cycles through Difference Mode Data Collection.
ZERO/ON (Reset)
Normal Operation [S]: This button is used to turn the unit “ON”. It is also used to electroni-
cally set the analog display to its mid-point and set the digital display to zero or a preset
value (if used).
Dynamic Operation: Used to reset and restart a min, max, TIR Dynamic Measurement.

9
The button can also be used to place the unit into a Non-Zero or True Spindle Position
(TSP) mode. To enter this mode, press and hold ZERO/ON for 1+ second. Once the mode
is selected, the unit displays the actual position of the spindle in the indicator’s measuring
range and the analog display changes to a single element mode showing the position of
the spindle to its range. To zero the gage, press and release ZERO/ON. the TSP Mode is
available in both Normal and Dynamic operation.
2.3 Setup Features
ANALOG MAGNIFICATION (Mode M1) [S]
Allows the selection of different magnifications for the analog scale. The scale can be
selected at X1, X5, X10, X50, or left blank.
MEASUREMENT DIRECTION (Mode M1) [S]
Allows the normal or reverse sensing of the indicated reading. Selections are Normal
(blank) or reversed (“R”).
PRESET VALUE (Mode M2) [S]
Allows the entry of any value from ± 0.00001in. to 99.99999in.
(± 000.0001mm to 999.9999mm) as a preset or actual number.
TOLERANCE LIMITS (Mode M12 & M23) [S]
Allows the entry of a pair of tolerance limit values in the range of ±99.99999 in.
(±999.9999mm).
GO/NOGO [S]
Allows tolerance evaluation by displaying GO/NOGO tolerance symbols instead of the
measurement value.

10
SWITCHABLE RESOLUTION (Mode M13) [S]
Resolution can be selected per the resolution table Ref: (Section 5.5, page 21). From
0.00001in to 0.01in (0.0002 to 0.2mm) depending on the indicator unit.
MULTIPLIER (Mode M3)
Allows the indicator to display a reading that is a multiple of the scale movement. Any mul-
tiplier from 00.001 to 99.999 may be entered to satisfy ratio type applications. For exam-
ple, if the multiplier is 2.00000, and the scale is moved 0.10000, the unit will display 0.200.
Multipliers less than 1.000
Using a multiplier less than 1 (one) will reduce the displayed resolution. For example: given
a multiplier of 0.01 and a resolution of 0.0001, the digital display will convert the scale loca-
tion of 0.1575 to 0.0016.
Additional resolution selections are available that allow the user to display a smaller resolu-
tion than that provided by the scale. Using the previous example with a resolution of
0.00001, the display value will be 0.00158, preserving more of the indicator’s resolution.
Non-Integer Multiplier
A non-integer multiplier will also cause the count size to be different from the resolution.
Normally, the least significant digit changes by the resolution. When a multiplier of 11.3333
is used with a resolution of 0.00005, the step size will be 0.00057. It is recommended that
the resolution be greater than the step size. For our example we would suggest 0.001.
Multipliers greater than 1.000:
Using a multiplier greater than 1 (one) will increase the display resolution. For example,
given a multiplier of 10.000 and a resolution of 0.0001, the digital display will convert the
scale location of 0.1575 to 1.5750. In this case, the least significant digit will be created by
the multiplication and not from the scale. In this case, the resolution should be changed
until the least significant digit is derived from the scale. In the example, the resolution
should be changed to 0.001. With this resolution, the digital readout will display 1.575.

11
DIFFERENCE MODE (Mode M1 X1)
Allows the indicator to collect two measurements sequentally and display the difference or
centerline value. Useful for preset or dynamic operation.
DYNAMIC MODE (Mode M2 X1)
Allows the indicator display to hold a live (static) reading or display and hold a dynamic
maximum, minimum or total indicated reading (TIR). TIR is the result of the maximum read-
ing minus the minimum reading.
DATA OUTPUT CONFIGURATION (Mode M3 X1)
Allows the data output to be configured for manual operation (send data button) or con-
tinuous output. The output string may also be set to include the indicator’s unique serial
number Identification.
2.4 Special Options Available in μMaxμm II Indicators
All µMaxµmII models may have one or more of the following factory installed optional fea-
tures:
POWER UP UNITS
A default of “in” or “mm” can be set whenever the indicator’s battery is changed (default is
inch units).
LOCKED inch/mm BUTTON
The inch/mm button is locked to prevent reading and data collection of mixed units
(default: unlocked inch/mm button).
LOCKED SETUP MODE [P]
Setup mode is locked out. Access to setup mode feature is possible by entry of factory
password (default: unlocked Set-Up Mode).

12
LOCKED MULTIPLIER
The indicator can be set to lock out the multiplier used in setup mode. This function is fac-
tory locked out (default unlocked multiplier entry).
LOCKED CALIBRATION (µMaxµm II only) [P]
The calibration mode is locked and accessible using the entry of a factory password
(default: unlocked Calibration Mode).
AUTO POWER DOWN DISABLED
Disables the indicator’s power down function. The indicator can only be powered down by
use of the “M/OFF” button (default: Auto-Power Down Enabled).
NOTE: No Auto-Power Down:
Standard units automatically power down after 15 minutes of inactivity: i.e. no spindle move-
ment, no buttons pushed and no data output requests. Selection of this option will disable the
Auto-Power Down feature so that the unit remains on until manually turned off. This feature
may reduce the battery life depending on usage.

13
NOTE: Factory Lockout:
The standard indicator allows access to all the features using the appropriate combination of
the three interface buttons. If the lock out option is specified, the user will not be able to
access those lock out features. All features are enabled or disabled at the factory. Locked fea-
tures identified by a [P] are accessible by entry of a fixed password that is factory set.

14
3.0 Inspection
The µMaxµm II indicator is shipped without batteries installed. Refer to Section 7.0 for
battery installation instructions. After batteries have been installed, turn the unit on by
pressing the ON button.

15
4.0 Mounting Gage for Setup
The µMaxum II indicator, normally stem mounted, can be mounted in a gage or fixture
using an optionally available back or adapter.
1) If the unit is OFF press and release the ZERO/ON button to turn the unit ON. If
unit is already ON, press and hold ZERO/ON button to enter TSP Mode.
2) Mount the indicator in the gage or stand.
3) Place the zero or nominal master in the gage or stand.
4) Mechanically adjust the indicator until the reading is at or near the desired
value/or spindle position. For the µMaxum II Comparator a zero setting value is
ideal.
5) Securely lock the Indicator into position.
6) Press and release the ZERO/ON button to set the indicator to the zero or preset
value.
You are now ready to take readings. The bargraph should either be blank (if Setup to be
blank) or a full bargraph with multiple graduations lit (if setup to be x1, x5, x10 or x50).
NOTE: A single grad segment traveling left and right indicates the Indicator is in TSP
Mode and not in gaging mode.

16
5.0 Setup Mode
All µMaxµm II style indicators are covered in this manual.
NOTE: If the unit is configured with a lockout feature, a prompt to enter a 4 digit numeric
password will appear. Only the Setup and Calibration modes are accessible by entering the
correct password. All other locked features are not accessible.
Entering the setup modes is accomplished by pressing and holding the M/OFF button and
then press and release the inch/mm button. The M1 icon will be displayed. Then press
and release the M/OFF button until the desired Mx icon is displayed in the lower left cor-
ner of the LCD display.
The µMaxum II sequences through several setup modes identified on the display by M1,
M2, M12, M23, M13, (M3, M1X1, M2X1, M3X1) and M123 icons. The icon’s are located
on the lower part of the display to identify the selected setup mode.

17
Setup Modes - Standard Model
M1 signifies Measurement Direction / Analog Scale Magnification [S]
M2 signifies Preset Entry Mode [S]
M12 signifies Limit #1 Tolerance Entry Mode [S]
M23 signifies Limit #2 Tolerance Entry Mode [S]
M13 signifies Digital Resolution Selection Mode [S]
Setup Modes - Advanced Model
M1 signifies Measurement Direction / Analog Scale Magnification [S]
M2 signifies Preset Entry Mode [S]
M12 signifies Limit #1 Tolerance Entry Mode [S]
M23 signifies Limit #2 Tolerance Entry Mode [S]
M13 signifies Digital Resolution Selection Mode [S]
M3 signifies Multiplier Mode
M1 X1 signifies Difference mode operation
M2 X1 signifies Dynamic mode operation
M3 X1 signifies Data output operation
M123 signifies Calibration Mode

18
5.1 Changing Measurement Direction (M1) [S]
1) Simultaneously press and hold M/OFF (1), then quickly press and release inch/
mm (2) once to enable the setup mode. (M1 icon appears in the lower left cor-
ner of the LCD) (Figure 1).
Figure 1 - Entering the Set-Up Mode
2) Press and release ZERO/ON to select the desired measurement direction signi-
fied by the “R” icon for reverse mode and no icon for the normal mode (Figure
2).
Figure 2 - Changing Measurement Direction
3) Press and release M/OFF until it returns to the gaging mode. No “Mx” icon is
displayed. Where “x” could be 1, 2, 3, 12, 23, etc.

19
5.2 Changing Analog Magnification (M1) [S]
1) Simultaneously press and hold M/OFF (1), then quickly press and release inch/
mm (2) once to enable the setup mode. (M1 icon appears in the lower left cor-
ner of the LCD) (Figure 3).
Figure 3 - Entering the Set-Up Mode
2) Press and release inch/mm to select the desired Analog Magnification signified
by the X1, X5, X10, X50, or no icon (blank) - no scale displayed (Figure 4).
3) Press and release M/OFF until it returns to the gaging mode. No “Mx” icon is
displayed. Where “x” could be 1, 2, 3, 12, 23, etc.
Display Icon ± Full Scale Grad Value
(in/mm) (in/mm)
no icon
X1 0.040 / 1.00 0.0020 / 0.050
X5 0.020 / 0.20 0.0010 / 0.010
X10 0.010 / 0.10 0.0005 / 0.005
X50 0.002 / 0.02 0.0001 / 0.001
uMaxumII
bar graph disabled

20
Figure 4 - Changing Analog Magnification
5.3 Entering a Preset (M2) [S]
1) Simultaneously press and hold M/OFF (1), then quickly press and release inch/
mm (2) once to enable the setup mode. (M1 icon appears in the lower left cor-
ner of the LCD) (Figure 3).
2) Press and release M/OFF once to enter the Preset Mode (M2 appears in the
lower left corner of the display) (Figure 5).
3) A cursor appears above the leftmost digital position for the sign. Press and
release ZERO/ON to toggle between “-” and blank “+”.
Figure 5 - Entering the Preset