HEIDENHAIN ND 2100G User Manual
Operating Instructions
ND 2100G
GAGE-CHEK
Software Version
2.60.x
English (en)
10/2011
ND 2100G Introduction
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1 LCD screen
2 Soft keys
3 Dimension keys
4 Command keys
5 Arrow cursor keys
6 Numeric Keypad
7 Fast track keys
8 Send key
9 LCD on/off key
ND 2100G panel keys
Panel keys are used to initiate feature measurements, apply
tolerances, send reports of measurement results and configure
operational parameters.
Panel function key Panel key
Soft keys: Functions change in support of the activities displayed
on the LCD.
Dimension keys: Can be assigned one of six hot key functions
for use when DRO screen is displayed. When graph, bar value or
data screens are displayed, dimension keys are used to display
values for single dimensions or a smaller group of dimensions.
Command keys: Control measurement and data entry
processes.
Arrow cursor keys: Used to scroll through lists and navigate
menus and setup screen data fields.
Fast track keys: Two programmable fast track keys are used to
perform frequently used functions. These keys can easily be
located by touch without taking your eyes off the part. Users can
program either fast track key as described later in the Hotkeys
portion of Chapter 2: Installation, Setup and Specifications.
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Panel function key Panel key
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Numeric keypad: Used to enter numeric data. Additionally, the
decimal point key and +/- key are used to adjust the contrast
of the LCD display.
Send key: Used to transmit measurement results to a computer,
USB printer or USB flash drive.
LCD On/Off key: Press the LCD on/off button to turn the LCD
display off without removing power from the ND 2100G. Press
the button a second time to restore the LCD display. Additionally,
the LCD On/Off key can be used to clear channel calibrations,
delete data stored for a single part or delete data stored for all
parts.
4 Preface
ND 2100G rear panel
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1 Power switch
2 Power connection with fuse
3 Ground (protective ground)
4 Encoder inputs
5 Relay outputs
6 Parallel I/O port
7 RS-232-C interface
ND 2100G side panel
1 Speaker/headset jack
2 USB Type A connector
3 RJ-45 Foot switch/hand switch/keypad connector
ND 2100G GAGE-CHEK 5
Information contained in this
manual
This User's manual covers the operation, installation, setup and
specifications of the ND 2100G. Operating information is contained in
chapter 1. Installation, setup instructions and specifications are
contained in chapter 2.
Fonts used in this manual
The following fonts are used to indicate operator controls or to show
emphasis:
Operator controls - soft keys and other panel keys are shown in
upper case
Emphasis - Items of special interest or concepts that are
emphasized to the user are shown in bold type
Showing sequences of key presses
The ND 2100G user performs sequences of soft key and panel key
presses to measure part features and complete other tasks. These
sequences are indicated using text as shown in the following
example:
Press the MENU... soft key, press the DATUM... soft key and then
press the MASTER soft key is sometimes abbreviated as:
Press MENU/DATUM/MASTER
Symbols within notes
Notes are marked with symbols on the left indicating the type, or
potential severity of the information.
General Information
This is additional or supplementary information about an
activity or concept.
Warning
This warns of a situation or condition that could lead to
measurement errors, equipment malfunction or
equipment damage. Do not proceed until the message is
read and understood.
Caution - Risk of electric shock
This warns of a situation or condition that could lead to
electrical shock and to personal injury or death. Do not
proceed until the message is read and understood.
6 Preface
Safety considerations
General accepted safety precautions must be followed when
operating the system. Failure to observe these precautions could
result in damage to the equipment, or injury to personnel. It is
understood that safety rules within individual companies vary. If a
conflict exists between the material contained in this manual and the
rules of a company using this system, the more stringent rules should
take precedence.
The ND 2100G is equipped with a 3-wire power plug that
includes a separate ground connection. Always connect
the power plug to a 3-wire grounded outlet. Use of 2-wire
power plug adapters or any other connection accessories
that remove the third grounded connection create a safety
hazard and should not be permitted.
Unplug the ND 2100G from the power outlet and seek the
assistance of a qualified service technician if:
The power cord is frayed or damaged or the power plug
is damaged
Liquid is spilled or splashed onto the enclosure
The ND 2100G has been dropped or the exterior has
been damaged
The ND 2100G exhibits degraded performance or
indicates a need for service some other way
ND 2100G channel inputs
The ND 2100G can be connected to the following channel
configurations.
1, 4, or 8 single input channels
Up to 16 networked RS-232 input channels
Or combinations of single input channels and networked RS-232
input channels for a total of up to 16 channels
Software version
The software version is shown in the About setup screen discussed
later in chapter 2.
Cleaning
Use only a cloth dampened with water and a mild detergent for
cleaning the exterior surfaces. Never use abrasive cleaners, and never
use strong detergents or solvents. Only dampen the cloth, do not use
a cleaning cloth that is dripping wet.
ND 2100G GAGE-CHEK 7
8 Preface
1 Operation .... 17
1.1 ND 2100G Overview .... 18
Overview .... 18
1.2 Basic operation of the ND 2100G .... 20
Switching on the ND 2100G .... 20
Switching off the ND 2100G .... 20
1.3 Panel key descriptions .... 21
Dimension keys .... 23
1.4 LCD screens and menus .... 26
Screen navigation .... 26
Home screen .... 27
DRO screen .... 27
View soft keys and screens .... 28
View soft keys for subgroups of one .... 28
Dimension graphs for SPC subgroups of one .... 28
Dimension histograms for SPC subgroups of one .... 29
Bar and dial current value displays .... 30
Dimension data tables for SPC subgroups of one .... 31
View soft keys for subgroups greater than one .... 32
Dimension x
Dimension r charts for subgroups greater than one .... 33
Dimension data tables for subgroups greater than one .... 34
in/mm menu items .... 35
Master menu items and screens .... 35
Master screen for calibrating encoder datums .... 35
Master screen for calibrating transducer ranges .... 36
Menu soft keys .... 37
The datum menu functions .... 37
The Extra menu functions .... 38
Fast3 .... 39
Setup menu functions .... 40
charts for subgroups greater than one .... 32
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1.5 Operating instructions .... 41
Select a part to begin a measurement .... 42
Establish a reference for the measurement .... 43
Calibrating channels using the Master function .... 43
Calibration of a single reference point .... 44
Calibration groups (G1, G2, G3...G18) .... 45
Calibrations of transducer resolution (Min-Max calibrations) .... 46
Establishing a temporary dimension reference .... 48
Zeroing a dimension reference .... 48
Presetting a dimension reference to a specific value .... 49
Clearing channel calibrations .... 50
Clearing dimension references (presets) .... 50
Conducting measurements .... 51
Manual measurements .... 51
Sequential measurements .... 52
Dynamically sampled measurements .... 53
Semi-automated measurements .... 54
Reviewing measurements .... 55
Printing reports or sending results to a computer .... 55
Printing reports .... 55
Sending data to a computer .... 56
Data reports .... 57
Clearing stored measurement data .... 58
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2 Installation, Setup, Formulas and Specifications .... 59
2.1 ND 2100G Shipment Contents .... 60
Items included with the ND 2100G .... 60
Optional items possibly included .... 60
Repackaging the ND 2100G .... 61
2.2 Hardware Installation .... 62
Assembling the mounting stand .... 62
Benchtop location and mounting .... 62
Arm mounting (optional) .... 63
Connecting power .... 64
Connecting channel inputs .... 65
Connecting a computer .... 66
Connecting headphones and USB printer .... 66
Connecting headphones .... 66
Connecting a USB printer .... 66
Connecting an optional foot switch or remote keypad .... 67
2.3 Software setup .... 68
Setup menu .... 69
Accessing and navigating the Setup menu .... 70
Using dimension keys in the setup mode .... 71
Entering data into setup fields .... 71
Deleting data entries .... 72
Entering setup parameters .... 72
Changing the channel or dimension number .... 72
Entering parameters .... 73
Copying parameters to other parts, dimensions or channels .... 73
Saving a parameter and advancing to the next .... 74
Saving a parameter and returning to the Setup menu .... 74
Discarding changes and returning to the Setup menu .... 74
Leaving the Setup menu .... 75
Printing ND 2100G setup configurations .... 75
Saving or loading ND 2100G configurations .... 75
Minimum setup requirements .... 76
Setup screens .... 76
About setup screen .... 76
Dimensions setup screen .... 77
Creating part numbers .... 77
Selecting part numbers .... 77
Labeling parts and dimensions .... 78
Defining visible and hidden dimensions .... 78
Copying dimension parameters to other parts .... 79
Deleting parts .... 79
Formats setup screen .... 80
Specifying a dimension .... 80
Specifying radius or diameter .... 80
Display resolution .... 81
Formulas setup screen .... 82
Variables setup screen .... 83
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Tolerances setup screen .... 84
Nominal values with tolerances .... 85
Nominal with +/- tolerances .... 85
Nominal with ++ tolerances .... 86
Nominal with -- tolerances .... 87
Nominal with fixed limits .... 88
Specifying an audio alert .... 89
Mirror values .... 90
SPC setup screen .... 91
Subgroup size .... 91
Max subgroups .... 91
Graph points .... 92
Next record ID .... 92
Dimension .... 92
UCL and LCL .... 93
x
, r Ucl and Lcl .... 93
Warning limits .... 95
Showing and hiding SPC graphs .... 95
Header setup screen .... 96
Labels .... 96
Prompts .... 96
Memory setup screen .... 97
S labels setup screen .... 97
S formulas setup screen .... 98
Globals setup screen .... 98
Channels setup screen .... 99
Specifying the input channel .... 99
Selecting the channel input type .... 100
Specifying input channel setup parameters .... 101
Master link probe balancing .... 101
Setting the resolution for the linked channels .... 102
Specifying channel input resolution .... 103
Specifying units of measure .... 104
Reversing channel input polarity .... 104
Specifying encoder reference marks .... 105
Changing the machine zero position .... 106
Enabling scale error notification .... 106
Calibrating LVDT and HBT transducer gain .... 106
Centering (nulling) LVDT and HBT transducers .... 107
Selecting an external RS-232 channel .... 108
Specifying an RS-232 input port .... 108
EnDat 2.2 encoder interface .... 109
Master setup screen .... 111
Specifying the number of calibration points .... 111
Selecting calibration type .... 111
Locking the calibration process if warnings occur .... 112
Specifying a calibration interval .... 112
Using dynamic Min/Max values for calibration .... 113
Specifying Min and Max calibration warnings .... 114
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SLEC setup screen .... 115
SLEC or LEC, which is right for my application? .... 115
LEC (Linear error correction) .... 115
SLEC (Segmented linear error correction) .... 116
SLEC setup procedure .... 118
Clear all datums .... 118
Cycle power & set machine zero .... 119
Clear old values & disable SLEC .... 120
Enter machine zero offset .... 121
Enter new station values .... 122
Enable SLEC .... 123
Display setup screen .... 123
Radix for numeric displays .... 123
Display mode for angles .... 123
Startup angular and linear display modes .... 124
Bar graph orientation .... 125
Bar graph or dial displays .... 125
Colors that indicate measurement results .... 125
Units of measure .... 126
Home screen .... 126
Report setup screen .... 127
Record number .... 128
Lines per page .... 128
Columns per page .... 129
Type of records to be printed .... 129
Report characters setup screen .... 130
Send setup screen .... 132
Auto Send Rec .... 132
Record Number .... 132
Record date, label and units of measure .... 132
Record content .... 133
Min Dimen Size .... 133
Send characters setup screen .... 134
Parallel setup screen .... 135
Remote control .... 135
I/O Debounce interval .... 135
RS-232 setup screen .... 136
Uart Id .... 136
Baud rate .... 136
Word length .... 136
Stop bits .... 137
Parity .... 137
Handshaking .... 137
End of character (EOC) delay .... 137
Specifying end of line (EOL) delay .... 138
Serial port data type .... 138
ND 2100G GAGE-CHEK 13
USB setup screen .... 139
Data .... 139
Destination .... 139
File type .... 140
Current auto (file) number .... 140
Hot Keys setup screen .... 141
Front panel keys for hot key mapping .... 141
Remote switches and parallel port pins for hot key mapping .... 142
Assigning hot key functions .... 143
Clock setup screen .... 152
Setting the date and time .... 152
Date format .... 152
Time format .... 153
External edge setup screen (optional) .... 154
Edge input .... 154
External edge probe timing .... 154
Edge Type .... 155
Direction factor .... 155
Teaching a probe diameter .... 157
Misc. setup screen .... 158
Key delay .... 158
Speaker volume .... 158
Data entry message time .... 158
Switch view .... 159
Cpk/Ppk display .... 159
Slew limit .... 159
Start Scr saver .... 159
Scr Saver Off .... 160
Startup hold .... 160
Strict Unit Check .... 160
Supervisor setup screen .... 161
Password .... 161
Unlocking and locking critical functions .... 161
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2.4 Formulas .... 163
Introduction to formulas .... 163
How do formulas relate inputs to dimensions? .... 165
Visible or hidden dimensions? .... 165
Visible dimensions .... 165
Hidden dimensions .... 165
When are dimensions stored in the ND 2100G database? .... 166
What can formulas do? .... 166
When are formulas constructed or edited? .... 167
How can formulas be recorded for safekeeping? .... 167
Constructing and editing formulas .... 168
Formula setup screen .... 168
Formula construction example .... 171
Long formulas .... 175
Deleting formula elements .... 175
Formula functions .... 176
Basic and advanced formula functions .... 177
Basic formula functions .... 178
Channel functions .... 179
Dimension functions .... 181
Arithmetic operators .... 183
Units of measure .... 184
Basic math functions .... 185
Exponent function (exp) .... 186
Trig and inverse trig functions (sin through atan) .... 187
Absolute value (abs) function .... 188
Integer function (int) .... 189
Pi and other constants .... 190
Advanced formula functions .... 191
Commas (,) .... 194
Semicolon (;) .... 195
Logical and control .... 196
Din .... 198
Dout .... 198
MinIndex and MaxIndex .... 199
RsetDyn .... 199
If function .... 200
Case function .... 201
Minimum (min) and maximum (max) functions .... 204
Average (avg) and median (md) functions .... 206
Modulo (mod) function .... 207
Sequence (seq) function .... 208
Trip function and measurement automation .... 212
Dynamic minimum (Dmn) and dynamic maximum (Dmx) functions .... 215
Dynamic average (Davg) and dynamic median (Dmd) functions .... 217
Fail function .... 218
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Xtra menu functions .... 219
Ask function .... 222
Beep function .... 223
Clear all data function .... 224
Clear data function .... 224
ClrTrig, SetTrig and user defined events .... 225
OnEvent function .... 226
DateStr function .... 228
TimeStr function .... 228
Time function .... 229
Din and DinBin function .... 230
Din .... 230
DinBin .... 232
Dout and DoutBin function .... 233
Dout .... 233
DoutBin .... 235
Display function .... 237
FnDefine, FnParam and FnCall functions .... 238
Variable and Global functions .... 240
Variables .... 240
Globals .... 242
Loop function .... 243
Remark function .... 244
HwDmn and HwDmx functions .... 245
RsetDyn function .... 245
HwLx function .... 246
Lookup and data lookup .... 247
Master function .... 250
MaxIndex and MinIndex functions .... 251
PartNo function .... 252
Preset function .... 253
Recall function .... 254
Relay function .... 255
Report function .... 257
Scan function .... 258
Send function .... 263
SendMsg function .... 264
SendRec function .... 265
SetColor function .... 266
Setup function .... 267
Xlatch function .... 268
2.5 Specifications .... 270
Dimensions .... 272
Arm mount bracket .... 273
16
Operation
1.1 ND 2100G Overview
Overview
The ND 2100G is an advanced digital readout system for performing
single or multiple gage measurements at very high levels of precision
and accuracy. Dimensional inspections of components are performed
using encoders or transducers as part of in-line production activities,
or final quality inspection. Measurements are conducted under
operator control, or are semi-automated and conducted in conjunction
with a fixtured gage system.
The ND 2100G is configured at the factory to support
One, four or eight single-input channels, or
Up to 16 multiplexed RS-232 input channels, or
1.1 ND 2100G Overview
Combinations of single-input channels and multiplexed RS-232 input
channels for a total of up to 16 channels
Channel inputs can be algebraically combined or processed by
powerful math and control formulas to display dimensions such as
flatness, volume and runout. Formulas are created as part of the
ND 2100G setup using straightforward screen control and math
functions.
C1=28.846 mm Sum=C1+C2 Sum=12.820
C2=-16.026 mm Dif=C1-C2 Dif=44.872
Channel inputs are processed by formulas to display dimensions.
18 1 Operation
The intuitive user interface includes a large character color LCD for fast
and accurate measurement feedback. User interface screens include
a digital readout of current values, bar and dial position value
indicators, graphs of values, histograms of measurement statistics
and tables of measurement and of SPC data.
Digital readout (DRO) Horizontal bar Vertical bar Dial
Graph of values Histogram of values Measurement data SPC data
1.1 ND 2100G Overview
ND 2100G GAGE-CHEK 19
1.2 Basic operation of
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the ND 2100G
Switching on the ND 2100G
Switch on the ND 2100G. The POWER switch is
located on the rear of the enclosure. After switching
the power on, or after a power failure, the power-up
screen will be displayed.
Press the FINISH key to advance from the power-up
screen to the home screen.
Your ND 2100G is now ready for operation.
1.2 Basic operation of the ND 2100G
Switching off the ND 2100G
Power-up screen.
Switch the ND 2100G off. The parts, formulas and
dimensions that have been saved during operation
will be retained in memory.
20 1 Operation
1.3 Panel key descriptions
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Descriptions of panel key functions are provided in the following
pages for Command, Fast Track, Send, LCD On/Off and Arrow Cursor
keys. Soft key functions are also described later as part of LCD
screens and menus.
Command keys Function
Enter data: Press the ENTER key to enter
data for a measurement. Information on the
LCD is stored as measurement or
configuration data. This information includes
current dimension values or alphanumeric
data for a configuration or user prompt data
field.
Exit a screen: Press the FINISH key to exit a
screen saving any changes that were made.
The FINISH key may also be used to return
from the display of measurement or SPC data
to the current home screen.
Delete data or features: Press the CANCEL
key to erase the last data value entered into
the system from the numeric keypad or
delete data in configuration fields.
Quit current activity: Press the QUIT key to
abort the current task and return to the home
screen or to exit the current menu.
Fast Track keys Function
Left frequently used function:
Press the LEFT WIDE key to initiate
the function programmed for this
key. The factory default function for
this key is RSETDYN.
Right frequently used function:
Press the RIGHT WIDE key to
initiate the function programmed for
this key. The factory default function
for this key is ENTER.
ND 2100G Panel keys.
1.3 Panel key descriptions
Send key Function
Transmit measurement results: Press the
SEND key to transmit measurement data to a
computer, a USB printer or a USB memory
drive.
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LCD On/Off key Function
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Turn the LCD off or clear data: Press the
LCD ON/OFF key to toggle between LCD on
and LCD off, or to clear channel calibrations,
delete data stored for a single part or delete
data stored for all parts
Arrow cursor keys Function
Numeric keys Function
1.3 Panel key descriptions
Navigate menus and setup screen
data fields.
The numeric keypad is used primarily
for numeric data entry. The decimal
point key and +/- key can also be used
to increase or decrease the LCD
screen contrast when a decimal point
or +/- input are not expected by the
system as part of a data entry
process. The screen contrast setting
will be saved when the system is
powered down and used as the
default contrast setting the next time
the system is turned on.
22 1 Operation
Dimension keys
Dimension keys can be assigned one of six hot key functions for use
when the DRO screen is displayed. When graph, bar value and data
screens are displayed, the dimension keys are used to display values
for single dimensions or a smaller group of dimensions.
Dimension keys Function
Pressing a dimension key in the:
DRO screen: performs the function
assigned in the hotkey setup
screen. By default no hotkey
function is assigned until the user
makes the assignment
Graph screens: displays a single
graph for the corresponding
dimension
Bar screens: Displays a single bar
showing current values for the
corresponding dimension
Data screens: displays a single data
table of stored values for the
corresponding dimension
Hot key assignments are discussed in detail on page 141.
1.3 Panel key descriptions
Soft keys Function
Soft keys initiate functions that are
labeled above the keys at the bottom
of the LCD screen. As different
system functions are selected, the
soft key labels change in support of
those functions.
ND 2100G GAGE-CHEK 23
Pressing the dimension A key in a graph screen
selects the A graph for display.
Pressing the VIEW... soft key changes soft key labels to show five
screen viewing options, graph, histogram, bar, data and DRO.
Pressing the VIEW... soft key causes soft key labels to change,
offering five options for viewing data.
When viewing graphs of stored data, current value bars or tables of
1.3 Panel key descriptions
stored data, pressing a different soft key changes to the view
indicated by the soft key label.
Pressing the DATA... soft key when viewing bars causes the
dimension data table to be displayed.
24 1 Operation
Pressing the currently highlighted soft key alternates between singledimension and multiple-dimensions displays.
Pressing the BAR... soft key when viewing multiple-dimensions
causes the currently selected dimension to be displayed by itself.
The left most soft keys can be designated hotkeys to
provide quick access to commonly used functions when
the home screen is displayed. Hot key assignments are
discussed in detail in Chapter 2: Installation, Setup and
Specifications.
1.3 Panel key descriptions
ND 2100G GAGE-CHEK 25
1.4 LCD screens and menus
The ND 2100G LCD presents a variety of screens and menus selected
by the user to display current dimension values, pass fail test results,
dimension value graphs, statistical process control graphs and data
tables, and setup and part configuration options.
Screen navigation
ND 2100G screen navigation is straightforward. For example, to
display a bar graph of current values from the home screen, press the
MENU... soft key, then press the VIEW... soft key and then the BAR...
soft key.
1.4 LCD screens and menus
Press the VIEW... soft key then the BAR... soft key.
26 1 Operation
Home screen
The home screen is displayed after the startup screen when power is
applied to the ND 2100G, and is displayed after the FINISH key is
pressed to complete a measurement or screen evaluation.The default
home screen is the DRO, but can be reassigned to another screen in
the Display setup screen.
The assignment of the home screen is discussed in detail
in Chapter 2: Installation, Setup and Specifications.
DRO screen
The DRO screen is the default home screen displayed after power is
applied and the startup screen is shown.The DRO screen provides
numeric displays of the current values of up to four dimensions. The
unit of measure, current datum and current part number or part name
are displayed in the upper right corner of the screen.
Use the arrow cursor keys to scroll dimensions when more than four
dimensions are active.
1.4 LCD screens and menus
DRO screen
ND 2100G GAGE-CHEK 27
View soft keys and screens
View soft keys for subgroups of one
Pressing the VIEW... soft key when using subgroups of one, changes
soft key labels to show five screen viewing options. Graph, histogram,
bar, data and DRO.
View soft keys Function
GRAPH... Displays data in a line graph
HISTO... Displays data in a histogram
BAR... Displays data in a bar graph
DATA... Displays numerical data
DRO... Displays the DRO screen
Dimension graphs for SPC subgroups of one
1.4 LCD screens and menus
The dimension graph screen is displayed for SPC subgroups of 1, and
displays graphs for up to 16 dimensions.
Press the GRAPH... soft key to change the number of graphs
presented on the screen. Press a dimension soft key to display a graph
of the dimension and the minimum additional dimensions. Use the
arrow cursor keys to scroll the graphs when more data is stored than
will fit on the screen.
Individual samples are selected by a vertical line on the graph. Move
the vertical line left and right through the stored data using the arrow
cursor keys. The time and date that the selected sample was stored
are shown in the upper left corner of the screen. The ID number of the
sample for the dimension and the value of the data are also shown in
the upper left corner. Displays of a single dimension also show the
nominal and control limit values.
View soft keys for subgroups of one.
Vertical selection lines.
Dimension line graphs for subgroups of one.
28 1 Operation
Dimension histograms for SPC subgroups of one
The dimension histogram screen displays histograms of values for up
to 16 dimensions. The dimension histogram screens are displayed for
SPC subgroups of one.
Press the HISTO... soft key to change the number of histograms
presented on the screen. Press a dimension soft key to display the
histogram of a single dimension.
The display of a single dimension also shows the total range and mean
of the values.
1.4 LCD screens and menus
Dimension histograms for subgroups of one.
ND 2100G GAGE-CHEK 29
Bar and dial current value displays
The bar and dial screens provide graphic displays of the current values
of up to 16 dimensions. The default bar screen can be configured to
display current value bars in horizontal or vertical orientation using the
Display setup screen.
Bar displays of multiple dimensions show current values. Bar displays
of single dimensions include the current value, nominal value, and high
and low warning and limit values.
Press the BAR... soft key to change the number of bars presented on
the screen. Press a dimension soft key to display a bar for a single
dimension.
The display can be configured in the Display setup screen to include a
dial in addition to the bars. When the dial display is also available, press
the BAR... soft key to toggle between the bars and the dial.
The display of a single dimension can be configured to be
a bar or a dial, but cannot be toggled between a single bar
and a single dial.
1.4 LCD screens and menus
Bar graphs for subgroups of one.
30 1 Operation
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