High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases
can be released unexpectedly and with extreme force. High pressure systems should be assembled and
operated only by personnel who have been instructed in proper safety practices.
reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose,
without the express written permission of DH Instruments, Inc. 4765 East Bea utiful Lane P hoenix AZ
85044-5318 USA.
DH Instruments makes sincere efforts to ensure accuracy and quality of its’ published materials;
however, no warrant y, express ed or implied, is pr ovided. DH Instruments dis claims an y responsibility or
liability for any direct or indirect damages resulting from the use of the information in this manual or
products described in it. M ention of an y product does not c onstit ute an endors em ent by DH Instruments
of that product. This manual was originally com posed in English and was subs equently translated into
other languages. The f idelity of the translation can not be guaranteed. In case of conflict between the
English version and other language versions, the English version predominates.
DH Instruments, DH, DHI, PPCK, PPC2, PPC2+ and COMPASS are trademarks, registered and
otherwise of DH Instruments, Inc.
Windows is a registered trademark of Microsoft Corporation.
Document No. 550095a-02
020925
Printed in the USA.
TABLE OF CONTENTS
T
AABBLLEE OOFF
T
C
OONNTTEENNTTS
C
S
TABLE OF CONTENTS ............................................................. I
TABLES ................................................................................ V
FIGURES .............................................................................. VI
USER REGISTRATION............................................................ IX
ABOUT THIS MANUAL............................................................ XI
5.2.1 TEST INITIALIZATION............................................................................................................................ 11
5.2.1.3 SELECT TEST FILE.............................................................................................................................14
5.2.1.7 USER ID.............................................................................................................................................. 18
5.2.2 RUN TEST............................................................................................................................................... 18
5.2.2.1 MANUAL ENTRY DATA ACQUISITION............................................................................................... 19
5.2.3 TEST CONCLUSION ............................................................................................................................... 20
10.3.1.6 [FILE], [SAVE AS ]................................................................................................................................ 65
10.3.1.7 [FILE], [SAVE ALL ]...............................................................................................................................65
10.3.1.9 [FILE], [CLOS E AL L ]............................................................................................................................ 65
10.4.1 DRAG AND DROP.................................................................................................................................. 72
10.4.2 COMMAND LINE ARGUMENTS............................................................................................................. 72
10.4.3 DDE (DYNAMIC DATA EXCHANGE)...................................................................................................... 72
11. THE [HELP] MENU ........................................................... 73
13.1.1 EXAMPLE #1........................................................................................................................................... 79
13.1.1.1 SET UP AN RS232 DUT...................................................................................................................... 79
13.1.1.2 SET UP A PPC2+ AS THE REFERENCE............................................................................................ 80
13.1.1.3 RUN THE TEST................................................................................................................................... 81
13.1.2 EXAMPLE #2........................................................................................................................................... 82
13.1.2.1 SET UP DMM DATA ACQUISITION DUT............................................................................................ 82
13.1.2.3 RUN THE TEST................................................................................................................................... 85
13.1.3 EXAMPLE #3........................................................................................................................................... 85
13.1.3.1 EXAMPLE MULTIPLEXER SETUP...................................................................................................... 86
13.1.3.2 EXAMPLE DMM SETUP...................................................................................................................... 87
13.1.3.3 UPDATE THE CONFIGURATION ........................................................................................................87
13.1.3.4 CONNECT THE DUTS......................................................................................................................... 87
13.1.3.5 RUN THE TEST................................................................................................................................... 87
14.1 HOW DO I? ............................................................................................................................................89
15.5 BEST FIT................................................................................................................................................94
Please fill out this r egistration s heet and return it to DH Instruments. Registering as a user will allow us
to contact you with important inform ation about COMPASS
and product announcement s .
COMPASS® for PPC/RPM™ User Contact:
Company/Organization:
R
EEGGIISSTTRRAATTIIOON
R
Pressure Calibration Software
Name:
Address 1:
Address 2:
City: State/Province:
Postal Code: Country:
Tel: Fax:
N
®
inc luding prod uct upgrades, p ossible reca lls
email:
1)
I am using COMPASS for PPC/RPM Ver. ____ ___ _ ____ __.
I will run COMPASS on a computer whose operating system is:
2)
Windows95 WindowNT Other__________
I plan to use COMPASS with the following reference pressure devices:
3)
PPC2 PPC2+ PPCK RPM1 RPM3 Other________
I plan to test up to __________ DUTs at a time with COMPASS.
4)
When I run tests with COMPASS, I will acquire data from the DUT(s) using the following:
5)
Manual DMM DMM+multiplexer RS232 direct IEEE 488 direct
Please return this form by mail or fax to: ATTN: COMPASS Registration
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
or via
Fax: 602.431.9559
email: dhi@dhinstruments.com
NOTE: COMPASS for PPC/RPM is a licensed software product intended for single computer use.
This manual provides the user with the basic information necessary to set up and run COMPASS
for PPC/RPM. It also includes a great deal of additional information provided to help you optimize
COMPASS use and take full advantage of its many features and functions.
Before using the manual, take a moment to familiarize yourself with the Table of Contents structure.
Sections 1 through 12 describe each of the six main menu selections in detail.
Quick Tips (see Section 13) provides responses to commonly asked questions and situations.
Certain words and expressions have specific meaning as they pertain to COMPASS for PPC/RPM.
The Glossary (see Section 15) is useful as a quic k refer ence for us age of s pecific term s and expr essions
as they are used in this manual and the program.
For those of you who don’t read manuals, go directly to Section 2.3 to install COMPASS and then
Section 3 for a summary of operating principles. Later … when you have questions or start to wonder
about all the great features you might be missing, get into the manual.
Cross references are used extensively to direct you towards additional information on a topic.
Cross references are generally in parenth eses and give the reference’s section num ber. For example:
(see Section 11).
[ ] indicates COMPASS menu or tab selections (for example [Data]) . Menu or tab selec tion paths are
always described hierarchically from highest to lowest level. For example: [Tools], [Options],
[Maintain Lists].
< > indicates COMPASS text displays such as screen names, field names, prompts, warnings
and instructions. For example: <Enter user ID>.
File names are designat ed in quotation m arks when they do NOT include a file ex tension. For example:
“log” file or *.log.
(CAUTION) is used in manual to identify user warnings and cautions.
(NOTE) is used in the manual to identify operating and applications advice and
Welcome to COMPASS® for PPC/RPM™, the complete pressure calibrati on software package f or users
of DHI PPC2, PPC2+, PPCK and RPM3 pressure transfer standards. COMPASS for PPC/RPM is
designed to suppl y the miss ing link nee ded to get f rom individu al autom ated hard ware com ponents to an
automated pressure ca libration s ystem. Using COMPASS for PPC/RPM, you can create any number of
calibration test s cenarios; define characteris tics of various devices u nder test (DUT); run tests ; analyze
test data and generate rep orts without ever leavin g the program or you can exp ort test data for anal ysis
using other applica tions. COMPASS’s flexible approach makes it easil y adaptable to a wide variet y of
hardware and allows you to adjust the level of automation for a variety of tasks and hardware
configurations from analog gauge calibration to fully automated multiple DUT test runs.
Please fill in and return the User Registration form located in this manual immediately following the
This section expla ins how to install COMPASS for PPC/RPM on your computer. Although COMPASS
for PPC/RPM is a multilingual application, the installation always uses English.
2.2 SYSTEM REQUIREMENTS
COMPASS for PPC/RPM is an application designed for Windows 32 bit operating systems.
The following minimum configuration is required to run COMPASS:
• Windows 95, 98, or NT
• 100 MHz, Pentium processor
• 16 MB RAM
• 5 MB free hard disk space
2.3 INSTALLING COMPASS FOR PPC/RPM
Insert the COMPASS for PPC/RPM disk 1 in your floppy drive.
Press the [Start] button and select [Run].
In the Run dialog box, t ype a:\setup or b:\setup, depend ing on the drive in which you plac ed the
COMPASS for PPC/RPM disk.
OR
Insert the COMPASS for PPC/RPM disk 1 in your floppy drive.
Use the Add/Remove Programs feature in the Windows Control Panel. Press [Start] and select
[Settings] followed by [Control Panel].
Double-click the [Add/Remove Programs] icon and c lick the [Install] butto n. Follow the prom pts to
install COMPASS.
2.4 RUNNING THE PROGRAM
When the software installation is complete, a new Windows group is created to hold the
COMPASS program. To run th e program , select it by pressi ng [Start], selecting the [Program s] sub-menu
followed by the [COMPASS] group. Click the [COMPASS for PPC/RPM] icon to start the program.
2.5 LANGUAGE SUPPORT
When COMPASS loads, a prompt displays requiring the selection of the language to use. Make the
selection from the lis t and press [OK]. The progr am displays all m essages and prompts in the selected
language. Subsequent runs of COMPASS display this dialog in the language selected in the previous run.
The [English] button will always run COMPASS in English and has the same effect as choosing
[English] from the language list. Check the <Do not display..> box at the bottom of the window to
prevent this displa y in the future. The language c an be changed while running COMPASS by selecting
[Tools], [Options], [Language] (see Section 8.3.6).
Figure 1. Language Selection
2.6 UNINSTALLING
To uninstall COMPASS, use the Remove COMPASS for PPC/RPM icon in the COMPASS program
group created during ins tallation. Alternatively, use the Ad d/Remove Programs feature in the W indows
Control Panel and select COMPASS for PPC/RPM. In both cases, a series of prompts must be followed in the
application removal program to uninstall COMPASS. All installation files and registry updates are removed.
Data directories cr eated by running COMPASS are not rem oved by uni nstalling. It is up to the user to
manually remove th ese da ta dir ect ories. T he a pplic ati on rem oval program wil l al ways dis pla y a mes sage
indicating COMPASS was not com pletely removed when executed and th e data directories ar e present.
Any file management tool such as Windows Explorer can be used to remove these data directories.
COMPASS for PPC/RPM is an application program intended to automate the test and calibration process
to the extent supported by your calibration hardware and appropriate for the DUT being calibrated.
COMPASS supports autom ated operation of DHI PPC and RPM transfer standards but can als o be used
with any type of pres sure standard from any manuf acturer. This feature allows COMPASS to be used
systematically to provide consistent data formats and report generation for all of your pressure calibrations.
COMPASS sets up and maintains files on devices under test (DUT) (see Section 6) and testing
procedures (see Sec tion 7) to assoc iate with DUTs . These files are recalled to run tests. Tests are run
using the hardware th at has been configur ed (see Section 8.2) in COM PASS. While running a tes t, data
is acquired and stored in a standard ASCII comma or tab delimited data file (see Section 12). Within
COMPASS, data files m ay be viewed (see Section 9 .2), used to generate plots (see Sec tion 9.4) and
used to generate reports (see Section 1) which can be customized with user edited templates.
COMPASS operations foll ow conventional Windows protocol for file management, menu and message
formatting, graphics and editing.
Devices under test (DUT) and test pr ocedures are def ined and recorded in *.dut and *.ts t files. To run a
test, first a *.dut f ile m ust b e create d (see Secti on 6.2) to def ine the DUT that wil l be test ed and a *.ts t file
must be created (se e Section 7.2) to pro vide COMPASS with the exac t testing procedure f or that DUT.
The hardware configurat ion, including the pressure referenc e device, the electrical measuring dev ice (if
present) and the computer ’s IEEE 488 card (if present) used to run the t est is specified with a Hardware
Configuration Tool ( see Section 8.2). Once “DUT” and “test” files have been set up, and the hardware
configuration has been defined, tests can be run (see Section 5.2).
Many operationa l preferences relating to how test are i nitialized and ru n, and how data is g athered and
stored are configurabl e with user options (see Sectio n 8.3). The use of these configura ble preferences
results in a test environment that is customizable to meet the testing needs of a diverse group of end users.
As a test runs, the data is c oll ected in a “ l og” f ile ( s ee Sect ion 12 .2) . When the test completes, the r es u lts
of the test are copied f rom the “ log” f ile in to “da ta” f iles . “Data” f iles are des igned to be eas il y exported t o
other applications by the u ser for further analysis or report ge neration. In addition, COMPASS includes
integrated analysis and reporting func tions which allo w full custom ization of repo rts (see Sec tion 1). Any
number of custom report formats can be creat ed and employed. Re ports can then be edit ed, printed or
saved. A plottin g function allows vario us auto-sc aled err or plots fo r test results t o be view ed and printed
(see Section 9.4).
Detailed inform ation and assis tance on COMPASS application a nd functions ar e available i n this manual
and with on-line help (accessed by pressing [F1] or selecting [H
In summary, the following steps and sections s hould be refer red to while trying to s et up and
run a test for the first tim e. Subseque nt tests will onl y require a sel ection of the desired DUT
and test file. The Run T est section of this manual has a m ore detailed explanation of the
requirements to run a test in COMPASS (see Section 5.2). Several COMPASS exam ples
and frequently asked ques tions are in t he Qu ick Tips section of this m anual ( see Section 1 3).
These sections are also very useful in gett in g star te d.
• Select [DUT], [Create] to create a DUT (see Section 6.2). A DUT that outputs an
electrical signal suc h as V, m V or m A will most lik ely use a dig ital m ultimeter . This DMM
should be set up in the program configuration (see Section 8.2).
• Select [Tools], [Configure Hardware] to update the program configuration
(see Section 8.2). This includes setting up the press ure reference as well as any other
peripheral devices required by a DUT. This option should be used t o set up a DMM,
multiplexer and s elect the system IEEE 488 i nterface card. Once these selec tions are
made there is no need to access the configuration unless a change in one of these
devices occurs. M ake sure the des ired selec tions are m ade on the [CONFIGURATION]
tab of the hardware configuration.
• Select [Test] , [Create Test] to create a test that will define the pr essure sequence and
other aspects of the testing procedure (see Section 7.2).
• Select [Run], [Run Test] or the corresponding toolbar shortcut to run the test.
• Main menu bar to access all COMPASS menus and functions (see Section 4.2).
• Run test toolbar with seven test running short cut keys (see Section 4.4).
• Run test screen providing complete real tim e information on test progress and results as a test is
running (see Section 4.3).
4.2 MAIN MENU BAR
The main menu is divi ded into seven separate selections. Each menu item is summarized below and
covered in detail in Sections 1 through 1:
[Run] Initialize and run tests. This menu also contains the choice used to exit the program
(see Section 1).
[DUT] All device under test (DUT ) inf orm ation is hand led her e b y creating, editin g and d eletin g *.dut
files (see Section 6).
[Test] All test procedure information is handled here by creating, editing and deleting *.tst files
(see Section 7).
[Tools] Access tools to c onfigure the test hard ware used by COMPASS, sel ect user preferences to
customize test ini tializati on and exec ution, select user pref erences f or file locati ons, m aintain
lists and send discreet commands to interfaced devices (see Section 8).
[Data] View, plot or print the raw data contained in the *.dat files that result from test execution
(see Section 9).
[Report] Edit report templates. Generate reports from *.dat files, save and print reports (see Section 1).
[Help] Access on-line help (see Section 1.
The Run Test screen provides real time information on test execution while a test is running.
Figure 2. Run Test Screen
The run test screen is segmented into eight functional areas described on Table 1.
Table 1. Run Test Screen
FEATURE DESCRIPTION
Status Message Bar
(Top line next to the
run test toolbar)
Read-out Panel
(Top left hand
quarter of screen)
Ready Indication LED
(Circle in the top left hand
corner of the screen)
Test Progress Summary
(WHITE characters in upper
right hand quarter of screen)
Current Function Box
(BLUE box in top right hand
quarter of screen)
Test Progress Bar
(Across middle of screen)
Displays real time messages describing t he sp ecific acti on COMPASS is executing. Uses
color coding and font changes to indicate that the program is running and to draw attention
when needed.
Provides real time readings of reference press ure, DUT output, DUT pressure (c alculated
from DUT output if DUT output is other than pressure), rate of change (stability) of
reference pressure and a green/red circular indicator of pressure ready/not ready (see
PPC or RPM Operation and Maintenance Manual for ready/not ready definition).
Readings are only displayed for values that can be read remotely by COMPASS from
interfaced devices. If no values are available, the fields show < -------- >.
Changes color from GREEN to RED to indicate whether the pressure reference meets or
fails the stability criterion specified in the test file.
Displays current DUT # (always one for single DUT tests), test point currently being
executed and total number of points in test, cycle # (always one for single c ycles tests),
and nominal pressure of current test point.
Indicates the current macro test function being executed by COMPASS (<IDLE>,
Visualizes test progress with a p rogressive horizontal bar and percent executed value.
Progress is in terms of current test point over total number of test points.
Identifies the DUT that is currently being displayed in the test point log and in the run time
plot. DUTs are identified by serial number/ID. If multiple DUTs are being tested, a dropdown menu to select an individual DUT or <All> is available.
Selecting <Pre Test> causes information on the leak test and/or cycling (exercising)
conducted at the beginning of the test to be displayed i f these were included in the test
definition.
The data for each test point is recorded and displayed in the test point log. If the DUT
error for the current test point exceeds the DUT tolerance, the computer beeps (if audible
feedback is enabled) and the row containing the t est point is highlighted (only the most
recent out of tolerance test point is highlighted). The status column for this point will
include a <T> for out of tolerance.
When testing multiple DUTs, selecting a single DUT in the <Current Display> selector
causes the complete test log for the DUT to be shown; selecting <All> causes the current
point for all the DUTs to be shown. The change f rom a single t o all DUTs c an be made at
any time.
<Test Point> is the number of the pressure point in the pressure point sequence.
<Reference Pressure> is the reading from the reference pressure device.
<DUT output> is the output recorded from the DUT. <DUT Pressure> is the pressure
calculated from the output using the output and pressure spans from the “DUT” file. If the
DUT output is pressure, DUT output and DUT pressure are identical.
<Error> is the difference between the DUT pressure and the ref erence pressure (DUT
pressure – reference pressure).
The <Status> column reports the status of the test point.
<OK> indicates that the test point executed normally and the DUT error was in tolerance.
<T> indicates that the DUT error was out of tolerance.
<S> indicates that data was taken from the reference when the reference was not ready
(applies only to automated reference devices).
The run time plot shows a plot of the DUT error (DUT pressure - reference pressure) in the
DUT pressure units.
The plot can scale automatically to the error data or include DUT tolerance bars and scal e
automatically to the DUT tolerance. Which scaling is used is determined by user
preference: [T
When testing multiple DUTs, selecting a single DUT in the <Current Display> selector
causes the error plot of the selected DUT only to be shown; selecting <All> causes error
plots for all the DUTs to be shown simultaneously. The change from a single to all DUTs
can be made at any time. Clicking on the plot causes a plot legend to appear.
The <Maximiz e Graph> key of the run test tool bar (see Section 4.4) may be used to
maximize the graph to the full screen. Click the key again to minimize the graph.
ools], [Options], [Run Test], <Plot data to tolerance> (see Section 8.3.3).
The run test toolbar pro vides a shortcut method for starting a t est, accessing DUT and test procedure
information while a test is running and other test func tions. The toolbar is located in the up per left-hand
corner of the main run screen. To use a tool, click on the tool icon.
Table 2 lists the tools available on the toolbar.
Table 2. Tools Available on the Toolbar
ICON DESCRIPTION
Starts a test, beginning with DUT selection or displays an option to re-run a test. Tests
Run
can be re-run only if the previous test was succ essfully initialized, and no configuration
changes have occurred since the com pletion of the previous run. The current DUT and
test file can be edited only. If this criterion is not met, the re-run option will not display
and test initialization immediately begins with DUT selecti on.
Step Back
Step Forward
View DUT
View Test Procedure
Maximize Graph
Causes the current test point to be interrupted and t he test point sequence to st ep back
to the most recent set pressure step. Subsequent clicks caus e the tes t to step back one
point for each click. This key is used to repeat points when needed.
Causes the current test point to be interrupted and the test point sequence to step
forward to the set pressure s tep of the next pressure point. This key enables only after
the step back key has been used; it cannot be us ed to s tep f orward over tes t point s t hat
have not been executed. Most often it is used to avoid repeating all previously execut ed
points when the step back key has been used to go back several pressure points.
Causes the DUT Profile screen to be displayed over the run test screen. This allows
complete information on the DUT being run to be reviewed without i nterrupting the t est.
Click <OK> to close the screen.
Causes the Test Definition screen to be dis played over the run tes t screen. This al lows
complete information on the current test proc edure to be reviewed without interrupting
the test. Click <OK> to close the screen.
Causes the current run time plot t o be maximized. Toggles between maximized and
standard size plots.
Abort
Causes the <Abort Test> confirmation pop-up to appear to abort the test that is running.
The [Run] menu is used to execute a test and to exit COMPASS. It has the following choices:
un Test], [Re-Run Test] and [Exit].
[R
5.2 [RUN], [RUN TEST]
This menu selectio n is used to start execution of a test. Pressing the [Run] key on the r un test toolbar
has the same effect as selecting this menu option. Test execution is divided into three sequential parts:
Test Initialization Selects the DUT and test procedure to run, sets up the reference, sets up DUT
identification and communications, enters user ID. The sequential steps of test
initialization can be turned ON or OFF using [Tools], [Options], [Initialize Test]
(see Section 8.3.2).
Run Testuns leak check (if included), runs pressure cycling to exercise DUTs (if included),
runs test pressure points and takes data at each point. The test run details are
defined by the *.dat file. Certain aspects of operation can be customized using
[Tools], [Options], [Run Test] (see Section 8.3.3).
Test Conclusion Presents <Test Notes> screen to rec ord test specific notes and <T est Complete>
screen with various test conclusion options.
5.2.1 TEST INITIALIZATION
Test initialization is the first part of test execution. The seven sequential steps of test
initialization can be turned ON or OFF using [To
(see Section 8.3.2). The test initialization sequential steps are listed immediately following
below (see Sections 5.2.1.1 through 5.2.1.7 for details on each initialize test step):
Select DUT File (see Section 5.2.1.1): The DUT selection tool is presented allowin g
browsing of DUTs avai lable and selection of the DUT file to run. If this s tep is turned
OFF, the screen is not shown and the last DUT file used is automatically selected.
Preview DUT (see Section 5.2.1.2): The DUT profile screen is presented to allow
verification of the DUT file to run. If this step is turned OFF, the step is omitted entirely.
Select Test File (see Section 5.2.1.3): The select test file screen is presented
identifying the primary and secondary test files associated with the current DUT and
allowing browsing of the test f iles available. If this ste p is turned OFF , the scree n is not
shown and the primary test file associated with the DUT is automatically selected.
Preview Test (see Sect ion 5.2.1.4): The pre view test file sc reen is presented to allow
verification of the test file to run. If this step is turned OFF, the step is omitted entirely.
Reference Verification/Range Selection (see Section 5.2.1.5): The reference
verification scree n is presented ident ifying the source of reference pressur es to be used
in running the test. If the reference has m ultiple ranges and ca n be communic ated with
remotely, the range selection function is included. The range recommended by
COMPASS or a d ifferent r ange can be selec ted. If this step is turned OF F, the screen is
not shown and the recommended range is automatically accepted.
Setup DUT(s) (see Section 5.2.1.6): The setup DUT(s) screen is presented.
This screen is intended to allow input of DUT identification and communication details
if necessary. If the DUT being run is a m anual data acquisition t ype DUT and the DUT
file is a DUT defini tion, t he scr een serves as verificat ion of DUT identif ication onl y. If the
DUT file is a DUT prof ile, identification of the DUT( s) must be provided. If the DUT(s)
being run is/are DMM, RS232 or IEEE 488 data acquisition type, the DUT
communications deta ils can be verified, changed and tested. If this step is turn ed OFF
and the DUT file is a DUT definition, the step is om itted entirely when all requ ired DUT
communications inf ormation is curren tly configured. T his means that a DMM is set up for
a DMM output DUT and the default R S232 or IEEE 488 comm ands have been set up to
meet the requirem ents of the current DUT (see Sectio n 8.3.3). If this step is turned OF F
and the DUT file is a DUT profile or the previous inform ation is not set up, the screen is
still presented and DUT identification(s) must be entered.
User ID Entry (see Section 5.2.1.7): The user ID entry screen is presented. T he last
user ID can be accepted, a new user ID m ay be enter ed, or a previo usly ent ered user ID
may be selected from the user ID drop-do wn list. If thi s s tep is turned OF F, the s creen is
not shown and the last user ID selected is automatically used.
Test initialization is complete, run test begins (see Section 5.2.2).
5.2.1.1 SELECT DUT FILE
The DUT selection tool is presented allowing browsing of DUTs available and
selection of the DUT file to run. If this step is turned OFF, the screen is not
shown and the last DUT file used or accessed is automatically selected.
DUTs available are listed by manufacturer, model, serial number and
identification as extracted from *.dut files. The list is alphabetical by
manufacturer. Us e your k eybo ard’s ar ro w k e ys or po in ting de vic e to hi ghl ig ht th e
desired DUT. The highlighted DUT file name and path are listed following:
To select the DUT based o n its f ile nam e, or if the f ile you want was not store d in
the directory specified for DUTs in your file location preferences (see Section
8.3.5), click <Browse> to activate a standard Windows file selection pop-up.
Figure 3. Select the DUT file for the Test Screen
5.2.1.2 PREVIEW DUT
The DUT profile screen is presented to allow verification of the DUT file to run. If this
step is turned OFF , the ste p is sk ipped entir ely. Edits cannot be m ade to a DUT
file during test initialization.
If the previe wed D UT is cor r ect, clic k <OK> and test ini ti ali zat io n wi ll c ont in ue. If the
DUT is not correc t, click <Cancel> to return to the DUT selection tool an d make
a new DUT selection. To abor t the tes t completely, click <Cancel> from the DUT
selection tool.
The select test file s c reen i s pres ente d i dent ifying the primary and secondary test
files associated with the current DUT and allowing browsing of the test files
available. If this step is tur ned O FF , the s cr een is not s ho wn and the pr imary test
file associated with the DUT is automatically selected.
The test selection screen c ontains the core information about the s elected DUT
which may be helpful in selecting the test file to run. The DUT’s primary and
secondary test files display and one of these can be selected by clicking the
corresponding selection button. To select a test file other than the primary or
secondary test file associated with the DUT, click <Browse> to activate a
standard Windows file selectio n pop-up. Click <Cancel> to abort the test completely.
Figure 5. Select Test File Screen
5.2.1.4 PREVIEW TEST
The preview test screen is presented to allow verification of the test file to run. If this
step is turned OFF, the step is skipped entirely.
The test cannot be m odified using this po p-up, but all the charac teristics can be
viewed by clicking on the appropriate tabs.
If the previewed test is correct, click <OK> and test initialization will continue. If the
test is not correct, click <Cancel> to return to the tes t selection tool and make a
new test selection. To abort the test completely, click <Cancel> from the test
selection tool.
Figure 6. Test Definition (C:\COMP4PRS\TEST\TEST1.TST) Screen
The reference verif ication sc reen is pr esented identif ying the sour ce of r eference
pressures to be used in ru nning the test. If COMPASS can communicate with
the reference remotely and the reference has multiple ranges, the reference
range selection tool and h ead adjustment is also included . If this step is turned
OFF, the screen is not shown, the recommended range is automatically accepted
and the current head (if the reference supports head corrections) is accepted.
See the Reference Pressure Device Operations and Maintenance Manual for
details on head corrections.
The reference shown is the reference currently selected in [T
ools], [Config
Hardware], [CONFIGURATION]. To change references, abort the test and go to
ools], [Config Hardware], [CONFIGURATION] to set up and/or select a
[T
different reference (see Section 8.2.1).
If COMPASS is able to communicate remotely with the reference, the range
selection tool is disp la yed. T his too l rec omm ends the range tha t COM P ASS has
determined to be the optimum range based on the span and pressure
measurement mode of the DUT . A different range may be selec ted by clicking
on the corresponding button.
If COMPASS is able to communicate remotely with the reference and the
reference supports automated pressure head corrections the current head
correction height is displayed and m ay be edited to reflect the correc t height for
the current setup. The head correction un its and/or medium cannot be change d
using this pop-up. To change these, abort the test and m ake the changes using
the reference device’s front panel function keys then restart the test. See
Reference’s Operatio n and Mainte nance Manua l for com plete information o n the
head correction function).
Erroneous data may be logged if the reference device’s characteristics are
modified manually without restarting the test. Always restart the test if
pressure reference device changes are made using the reference device’s
front panel.
The setup DUT( s) screen is pr esented. T his screen is intended to a llow input of
DUT identification and communication details if necessary.
See Section 6.2 for information on DUT profiles vs. definition files and DUT
data acquisition type.
Do not use the following characters in the serial number or identification
fields: \,/, :, *, ?, “, <,>, |, a comma or tab character. These characters will cause
problems when importing the “data” file or creating the “data” file directory.
The setup DUT(s) screen’s appearance and operation vary depending on
whether the DUT file being run is a DUT definition or a DUT profile and on th e
DUT’s data acquisition type (see Section 6.2):
• If the DUT file is a DUT definition file and the DUT data acquisition type is
manual, the screen sets up for a single DUT. The screen serves only for DUT
verification as the DUT ide ntification comes from the *.dut file and there are
no communications to verify. If the setup DUT step is turned OFF, setup
DUT is omitted entirely.
• If the DUT file is a DUT definition file and the DUT data acquisition type
is DMM, RS232 or IEEE 488, the screen sets up for a single DUT.
DUT communication details c an be verif ie d, c han ged a nd tested. If the setup
DUT step is turned OFF, s etup DUT is omitted ent irely. This f eature can be
removed only when a DUT definition is used with DMM data acquisition or the
default interface parameters (see Section 8.3.3) will work with the current DUT.
• If the DUT fi le is a DUT p rofil e file , the scr een se ts f or entr y of up to 5 0 DUTs .
The screen requires entry of a DUT serial number for each DUT to be t es ted.
Serial number entr y in the DUT position is the means b y which COMPASS
determines how many DUTs to include in the test run and the position of
the DUTs. Identification is not a requ ired field. If the DUT data acquisiti on
type is DMM, RS232 or IEEE 48 8, DUT comm unication det ails for each DUT
individually can be verified, changed and tested. If the setup DUT step is
turned OFF, the setup DUT sc reen will still ap pear and r equire serial num ber
entry to identify the DUTs to be tested.
To check communications with the DUT(s), click the <Communications Test> button. COMPASS attempts to comm unicate with all DUTs that have
had a serial number entered using the command specified in the DUT file
and the current comm unications settings. If communication is successful, the
DUT output is update d in the <D UT O utp ut> column. If communication fails,
an error message is displayed.