WIKA Mensor CPA8001 User manual
CPA8001
Operating Instructions
Air Data Test Set CPA8001 PN 0018608001G • 05/2019
Air Data Test Set
Air Data Test Set
CPA8001
2 Operating Instructions - CPA8001
This Warning symbol indicates that danger of injury for persons and the
environment and/or considerable material damage (mortal danger, danger of
injury) will occur if the respective safety precautions are not taken.
This Caution symbol indicates danger for the system and material if the
respective safety precautions are not taken.
This Notice symbol does not indicate safety notices but information for a
better understanding of the facts
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Operating Instructions - CPA8001 3
Table of Contents
1. General Information 7
1.1 Warranty 7
1.2 Important Notice 7
1.3 FCC Radio Frequency Emission Notice 7
1.4 Trademarks and Copyrights 8
1.5 Software License Agreement 8
1.6 Mensor Service Plus 8
1.6.1 After the Warranty 8
1.6.2 Calibration Services 9
1.6.3 Accreditations 9
1.7 Packaging for Shipment 9
2. Safety Notices 10
2.1 User Responsibilities 10
2.2 General Safety Notices 10
2.3 Warnings and Caution Notices 11
3. Product Description 12
3.1 General Description 12
3.2 IntelliScale Transducer Choices 12
3.3 Front Panel 13
3.3.1 Power Switch 13
3.3.2 USB Port 13
3.3.3 Information Label 13
3.3.4 Screen 13
3.3.5 Main Screen Features 14
3.3.5.1 Screen Navigation 14
3.4 Main Features 15
4.Specications 16
4.1MeasureSpecications 16
4.2ControlSpecications 17
4.3GeneralSpecications 17
4.4 Transducer Removal/Replacement 18
4.5 Regulator 19
4.6 Transducer Module 19
4.7 IntelliScale 20
5. Installation 21
5.1 Initial Installation 21
5.2 Unpacking the System 21
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4 Operating Instructions - CPA8001
5.3 Dimensions (inches) 22
5.4 Turning on the CPA8001 23
5.5 Pressure Connections 23
5.6 Pneumatic Connections and Pressure Fittings 25
5.7 Electrical & Communication Connections 26
5.7.1 Notices Regarding the Electrical Connections 27
5.7.1.1 Power Supply 27
5.7.1.2 Interfaces 27
5.7.1.3 Ethernet Interface 27
5.7.1.4 USB Host Interface 27
5.7.1.5 USB Device Interface 27
5.7.1.6 RS-232 Interface 27
5.7.1.7 IEEE-488 Interface 27
6.LocalOperation 28
6.1 General 28
6.1.1 Buttons, Keys, Switches, Tabs, and Other Terms 29
6.1.2 Map of the Main Screen Features 29
6.2 Main Screen Buttons / Features 30
6.2.1 CPA8001AirDataTestSetCongurationOptions:Ps/PtorPs/Qc 31
6.2.2 Avionics / Pressure Reading 31
6.2.3 Setpoint Buttons 32
6.2.4 Setpoint Value 32
6.2.5 Setup 33
6.2.6 Setpoint Entry Methods 33
6.2.6.1 Number Pad 34
6.2.6.2 Number Pad / Step 35
6.2.6.3 Digital Step 35
6.2.6.4 Program Data Entry 36
6.2.7 Favorites 37
6.2.8 Status Bar 37
6.2.9 Secondary Display 38
6.2.10 Limits 39
6.2.11 Instrument Modes / Avionics Units / Pressure Units 40
6.2.12 Pressure Type 40
6.2.13 Operating Modes 41
6.2.13.1 Measure Mode 42
6.2.13.2 Control Mode 44
6.2.13.3 Vent Mode 46
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6.2.13.4 StateoftheIsolationValveswhentheCPA8001iso 48
6.2.14 Vacuum Setting 49
6.2.15 Automated Zero 50
7. Setup 52
7.1 General Tab 53
7.1.1 Instrument Mode 53
7.1.2 Linked Modes 54
7.1.3 Language 54
7.1.4 Brightness 55
7.1.5 Volume 55
7.1.6 Zero Reminder Interval 56
7.1.7 Save[Conguration] 56
7.1.8 Load[Conguration] 57
7.2 Remote Tab 58
7.2.1 Remote Command Set 58
7.2.2 IEEE-488 Address 58
7.2.3 Ethernet Communication 59
7.2.4 Termination Character 59
7.2.5 Serial Communications 60
7.3ChannelSetup[Ps],[Pt]and[Qc] 61
7.3.1 Setup Units 62
7.3.2 Rate Units 62
7.3.3 Secondary Display 63
7.3.4 Secondary Display Units 63
7.3.5 Filter 64
7.3.6 Resolution 64
7.3.7 NegativeQcLimits 65
7.3.8 QcReference 66
7.3.9 True Airspeed Enable 67
7.3.10 True Airspeed Temperature 67
7.3.11 Maximum Limits and Minimum Limits 68
7.3.12 Stable Limits and Stable Delay 69
7.3.13 Rate Maximum Limits and Rate Minimum Limits 71
7.3.14 Rate Stable Limits and Rate Stable Delay 72
7.3.15 Vent Rate (Go-To-Ground parameters) 73
7.4 Applications 74
7.4.1 Passwords 75
7.4.2 Calibration - Guidelines 76
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6 Operating Instructions - CPA8001
7.4.2.1 Calibration Environment 76
7.4.2.2 Calibration Pressure Standards 76
7.4.2.3 Calibration Media 76
7.4.2.4 Calibration Setup 77
7.4.3 Calibration Procedures 78
7.4.3.1 1 Point Calibration 79
7.4.3.2 2 Point Calibration 82
7.4.3.3 Linearize 83
7.4.3.4 Head Correction (password protected) 85
7.4.4 Programs 86
7.4.5 Favorites 87
7.4.6 Troubleshoot 87
7.4.7 Admin 88
7.5 Info Tab 88
8. Remote Operation 89
8.1 Software/Functions 89
8.2 Remote Command Set 89
8.3 SCPI Commands 97
8.4 SCPI Error Messages and Error Codes 101
9. Options 102
9.1 Transport Case 102
9.2 Rack Mount Kit 102
9.3 Barometric Reference Transducer 102
9.4 Adaptor Fittings 103
10. Maintenance 103
10.1 Beyond the Warranty 103
10.2 Troubleshooting 103
10.2.1 Pressure Transducer Location 105
10.2.2 Transducer Removal / Replacement 105
11. Appendix 107
11.1 Avionics Overview 107
11.2 Measurement Units 108
11.3 Conversion Factors, bar 109
11.4 Conversion Factors, PSI 110
11.5 Conversion Factors, millitorr 111
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Operating Instructions - CPA8001 7
1. General Information
1.1 Warranty
All products manufactured by Mensor LP (Mensor) are warranted to be free of defects in workmanship
and materials for a period of two years from the date of shipment. No other express warranty is given,
andnoarmationofSeller,bywordsoractions,shallconstituteawarranty.SELLERDISCLAIMSANY
IMPLIEDWARRANTIESOFMERCHANTABILITYORFITNESSFORANYPARTICULARPURPOSES
WHATSOEVER. If any defect in workmanship or material should develop under conditions of normal
use and service within the warranty period, repairs will be made at no charge to the original purchaser,
upon delivery of the product(s) to the factory, shipping charges prepaid. If inspection by Mensor or
its authorized representative reveals that the product was damaged by accident, alteration, misuse,
abuse, faulty installation or other causes beyond the control of Mensor, this warranty does not apply.
ThejudgmentofMensorwillbenalastoallmattersconcerningconditionoftheproduct,thecauseand
nature of a defect, and the necessity or manner of repair. Service, repairs or disassembly of the product
inanymanner,performedwithoutspecicfactorypermission,voidsthiswarranty.
MENSORMAKESNOWARRANTYOFANYKINDWITHREGARDTOTHISMANUAL,INCLUDING,
BUTNOTLIMITEDTO,THEIMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESSFOR
A PARTICULAR PURPOSE. Mensor shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
1.2 Important Notice
Theproductspecicationsandotherinformationcontainedinthismanualaresubjectto
change without notice.
Any reproduction of this manual or parts thereof by any means is prohibited.
1.3 FCC Radio Frequency Emission Notice
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules.These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment.This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communications. Operation of
this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his or her own expense.
Use shielded cables to connect external devices to this instrument to minimize RF radiation.
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8 Operating Instructions - CPA8001
1.4 Trademarks and Copyrights
WIKA is a registered trademark of WIKA Alexander Wiegand SE & Co. KG.
Mensor is a registered trademark of Mensor LP. ©2012, Mensor LP. All rights reserved.
All other brand and product names are trademarks or registered trademarks of their respec-
tive companies.
1.5 SoftwareLicenseAgreement
This product contains intellectual property, i.e., software programs, that are licensed for use by the end
user/customer (hereinafter “end user”).
This is not a sale of such intellectual property. The end user shall not copy, disassemble, reverse
engineer or de-compile the software programs.
The software programs are provided to the end user “as is” without warranty of any kind, either
expressorimplied,including,butnotlimitedto,warrantiesofmerchantabilityandtnessfora
particular purpose.The entire risk of the quality and performance of the software program is
with the end user.
Mensoranditssuppliersshallnotbeheldtoanyliabilityforanydamagessueredorincurredbythe
end user (including, but not limited to, general, special, consequential or incidental damages including
damagesforlossofbusinessprots,businessinterruption,lossofbusinessinformationandthelike),
arising from or in connection with the delivery, use or performance of the software program.
1.6 Mensor Service Plus
Mensorhasmadeaconcertedeorttoprovidecompleteandcurrentinformationfortheproperuseof
the equipment. If there are questions regarding this manual, proper use of the equipment, or if you have
problemsusingyourCPA8001andyoudon’tndtheanswerinthismanual,contacteitherMensoror
WIKA for personal assistance.We are ready to help.
Mensor WIKA Alexander Wiegand SE & Co. KG
201 Barnes Drive Alexander-Wiegand-Straße 30
San Marcos, Tx 78666 63911 Klingenberg / Germany
tel: 1-512-396-4200 tel: +499372/132-5015
1-800-984-4200 (USA only)
fax: 1-512-396-1820 fax: +499372/132-8767
email:sales@mensor.com email: CTSales@wika.de
website:www.mensor.com website:www.wika.de
1.6.1 After the Warranty
Mensor’s concern with the performance of this instrument is not limited to the warranty period. We
providecompleterepair,calibrationandcerticationservicesafterthewarrantyforanominalfeeas
explained in Section 10. Maintenance.
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Operating Instructions - CPA8001 9
1.6.2 Calibration Services
In addition to servicing our own products, Mensor provides complete pressure calibration services up
to20,000psiformanypressureinstruments.ThisserviceincludesaCerticateofComplianceand
Calibration and a record of traceability to the pressure standards of the United States National Institute of
Standards and Technology (NIST).
1.6.3 Accreditations
MensorisregisteredtoISO9001:2008.ThecalibrationprogramatMensorisaccreditedbyA2LA,as
complyingwithboththeISO/IEC17025:2005andtheANSI/NCSLZ540-1-1994standards.
1.7 Packaging for Shipment
Iftheproductmustbeshippedtoadierentlocationorreturnedforanyreasonthroughacommoncarrier
it must be packaged properly to minimize the risk of damage.
The recommended method of packing is to place the instrument in a container, surrounded on all sides
with at least four inches of shock attenuation material such as styrofoam peanuts.
If the instrument will be subjected to frequent transport then the optional Transport Case shown in
Section 9, Options, might be an economical solution.This wheeled case is very rugged and provides
complete and long term protection against rough handling.
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10 Operating Instructions - CPA8001
2. Safety Notices
2.1 User Responsibilities
Toensuresafety,theoperatormustmakesurethatthefollowingconditionsaremet:
■Thesystemisusedproperly,nodangerousmediaareusedandthatalltechnicalspecicationsare
observed.
■The system is in perfect operating condition.
■The operation manual is legible and accessible to the user at the system’s location.
■Thesystemisoperated,servicedandrepairedonlybyauthorizedandqualiedpersonnel.
■The user receives instruction on industrial safety and environmental protection, and is knowledgeable
of all operating instructions and safety notices relevant to the current procedure.
2.2 General Safety Notices
The system should be operated only by trained personnel who are familiar with this manual
and the operation of the instrument.
A condition for trouble-free and safe operation of this system is proper transport,
proper storage, installation, assembly and proper use as well as careful operation
and maintenance.
Any operation not described in the following instructions should be prohibited. The
system must be handled with care required for an electronic precision instrument
(protectfromhumidity,impacts,strongmagneticelds,staticelectricityand
extreme temperatures). Do not insert any objects into the instrument.
The system is powered via the power cable with a voltage that can cause physical
injury. Even after disconnecting the system from the power supply, dangerous
voltages can temporarily occur due to capacitance.
The use of hazardous or toxic media is prohibited.
Repairs must be performed only by authorized service personnel.
Additional safety notices are found throughout this manual.
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2.3 Warnings and Caution Notices
WARNING: HIGH PRESSURE! High pressure gases are potentially hazardous.
Energy stored in these gases can be released suddenly and with extreme force.
High pressure systems should be assembled and operated only by personnel who
have been trained in proper safety practices.
WARNING:POSSIBLEINJURY!Thetubing,valvesandotherapparatusattachedto
the instrument must be adequate for the maximum pressure which will be applied,
otherwise physical injury to the operator or bystanders is possible.
CAUTION: Use the proper pressure medium. Use only clean, dry, noncorrosive
gases. This instrument is not designed for oxygen use.
WARNING:NOTEXPLOSIONPROOF!Installationofthisinstrumentinanarea
requiring devices rated as intrinsically safe is not recommended.
CAUTION: ESD PROTECTION REQUIRED. The proper use of grounded work surfac-
es and personal wrist straps are required when coming into contact with exposed
circuits (printed circuit boards) to prevent static discharge damage to sensitive
electronic components.
WARNING: The calculation from the current Ps and Qc pressure becomes theoreti-
calfortheengineeringunitMach,aboveMach6.UsetheMachvaluesaboveMach6
at your own risk.
Additional Warning and Caution notes are included throughout this manual.
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12 Operating Instructions - CPA8001
3. Product Description
3.1 General Description
TheCPA8001AirDataTestSethasthefollowingfeatures:
■19” rack mount compatibility
■Designed for serviceability and reliability
■Wide screen display with glass capacitive touchscreen
■Front panel door gives access to instrument interior
■APs/PtorPs/Qctransducerpackage(Appendix 11.1 gives an overview of altitude and airspeed
avionics terminology and hardware.)
■Dual channel control of altitude/altitude rate and air speed/airspeed rate (air data mode)
■Dual Channel control of pressure and pressure rates (pressure mode)
■Adaptive control algorithm
■Automated Zero adjustment sequence using internal high accuracy reference transducer
■Ethernet, RS-232, USB, and IEEE-488 communications
■Remote communication emulation of Mensor legacy products
■Emulation of competitive instrument command sets
■Local program capability
■Multiple language support
■On board diagnostic logging
■Barometric reference option
■High Accuracy
■Complies with latest CE and 61010 regulations
The CPA8001 Air Data Test Set is designed to automate the testing and calibration of avionics altitude
and airspeed instruments. A unique single package dual transducer, removable / interchangeable
modulecontainingPs/QcorPs/Pttransducersisincluded.Thistransducermoduleisconguredwithits
own calibration parameters on board.
This unique Transducer set, in combination with the internal control valve regulator, provide a dynamic
output. The operator can choose to control in air data mode or in pressure mode. Transducer pressure
rangescanbechosentotspecicaltitudeandairspeedrequirements.
A barometric transducer is available as an option for reference indication of atmospheric pressure.
3.2 IntelliScale Transducer Choices
The CPA8001 is supplied with IntelliScale Transducers. Refer to Section4Specications, for a full
descriptionoftheuncertaintyspecicationandSection 4.7 IntelliScale.
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3.3 Front Panel
The front of the CPA8001 has a smooth, uncluttered appearance. Its main feature is the large color
displayplusanidenticationlabelinthelowerrightcornerofthedisplaypanel.Thedisplaypanelis
hinged for easy access to remove or replace the transducer modules inside.The instructions for access-
ing the transducers are provided in Section 10.2.2, Transducer removal/replacement. Immediately to the
right of the display panel is a USB port and a power switch.
Hinged Display Panel
Power Switch
USB Port
Label
Ps:0...37inHgA|0.009%IS-50
Qc:0...110inHgD|0.01%FS
S/N:920004|TAG920004
CPA8001
Figure 3.3 - Front View
3.3.1 Power Switch
The power switch is a two-state device with an action similar to that of a ball point pen. Push the button
with enough force to latch it in to turn the unit ON. Push it again to release it to turn the system OFF.
If power to the instrument is interrupted while ON it will shut down until the power is
restored, then immediately resume operation.
3.3.2 USB Port
The front panel USB port is a Host port like the USB port on the rear panel. Both are intended for future
expansions or software upgrades
3.3.3 InformationLabel
Thefrontpanellabelidentiestheinstalledtransducerrangesinthepressureunitsspeciedbythe
customer, the serial number and tag number.
3.3.4 Screen
The large (9 inch diagonal) LCD color screen has a glass capacitive touch screen for navigation within
theintuitiveoperatorinterface.Atpowerupthemainscreenispresented.(Seegure3.3.5).
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14 Operating Instructions - CPA8001
3.3.5 Main Screen Features
On power up, the main screen will show a numeric data entry key pad in the center of the display, Ps
channelontheleftandQcorPtchannelontheright.Thedataentrykeypadcanbeswitchedbetween4
dierentmethodsfordataentry.SeeSection6,LocalOperation,formoredetails.
Appendix 11.1 gives an overview of altitude and airspeed avionics terminology and
hardwareandincludesdenitionsofPs,PtandQc.
ThePs(left)andQcorPt(right)screensections(Seegure3.3.5)containthetransducerreadings,
setpoints,currentdisplayconguration,rangelimitsandlabels(seeSection 6, Local Operation, for more
details). Avionics or pressure calibration and testing functions are performed through Interaction with this
screen; the majority of an operator’s local operation time will be spent working with this screen. A map of
the individual features on the various displays is included in Section 6.1.2.
Main screen
ALTITUDE
Test/Calibration
Parameters
Data entry
AIRSPEED
Test/Calibration
Parameters
Pt TOTAL PRESSURE
Test/Calibration
Parameters
Qc
or
Pt
Figure 3.3.5 - Main Screen Features
3.3.5.1 Screen Navigation
Individual screens are accessed or opened by a series of touches on tabs, buttons or icons. Nomencla-
ture that designates a screen and how to navigate to it will be given in this manual in the following struc-
ture:“Iconname”[IconGraphic]/[Tab]/[ButtonName].
For example the screen used to set the resolution of the Ps transducer would be designated by the
navigationalscreenhierarchy,startingfromthemainscreen,asfollows:Setup [ ] / [Ps] / [Resolu-
tion].This convention is similar to a computer folder system and will be used to designate a screen and,
inherently, how to navigate to it.
All of the setup screens have two display areas.The left 2/3 of the screen shows information about test
and calibration parameter being adjusted.The left 1/3, data entry section, has the number key pad,
variable sliders or discrete choice buttons (radio buttons) that all act to input alpha numeric information or
mode changes relating to the test or calibration information being shown on the left.
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Operating Instructions - CPA8001 15
Buttons on the screen are shown with a gradient background. When inactive the buttons are shown
with the gradient dark on the bottom and light on the top; when selected the button changes color and is
light on the bottom and dark on the top. Buttons are labeled in an intuitive fashion and when selected its
function is obvious.
The setup screens are accessed by pressing the double gear icon [ ].Thesesetupscreensareused
foravarietyofinstrumentsettingsincluding,generaldisplaysettings,Ps,QcorPtsettings,andremote
interface settings. This area also contains the application used to calibrate the internal transducers
plusvariousadministrative,informationandcongurationsettings.Detailedinformationaboutallsetup
screens can be found in Section 7, Setup.
Touchtheleftpointingarrow[◀]inthebottomleftcornerofanysetupscreentoreturntothemain
screen.
Full operational descriptions of all of the screens, symbols, labels and switches are provided in Section
6, Local Operation.
3.4 Main Features
■Auniqueremovable/interchangeablepressuremodulecontainingbothPsandQcorPttransduc-
ers (see Section 10.2.2, Transducer Removal/Replacement).The transducer module is a totally self-
contained and includes its unique calibration data.
■TruedifferentialpressuremeasurementintheQctransducerisachievedthroughcharacterizationof
the transducer at operational line pressures.
■IntelliScale calibrations for maximum accuracy specifications.
■A zeroing sequence that automatically adjust Ps and/or Pt transducer zero to an internal high accura-
cyabsolutetransducer,andadjuststheQctransducerzerotoatmosphericpressure.
■An optional high performance barometer module can be installed for auxiliary barometric pressure
indication.
■A large 9- inch diagonal color LCD with glass capacitive touch screen for intuitive operator interface.
■Quietprecisionpressureregulator.
■Multiple languages; simply touch one of the national flags on the display to instantly change the
on-screen text language, and the corresponding number and date formats. For more detailed informa-
tion see Section 7.1.1, Language.
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16 Operating Instructions - CPA8001
4. Specications
4.1 MeasureSpecications
Transducer Range
UncertaintySpecication
Ps 0 ... 29.5 to 0 ... 37 (0 ... 950 to 0 ... 1253), inHgA@0oC (mbar)
Measurement Uncertainty (2) 0.009%IS-50(1)
Pt 0 ... 40 to 0 ... 110 (0 ... 1355 to 0 ... 3725), inHgA@0oC (mbar)
Measurement Uncertainty (2) 0.01%IS-50(1)
Qc -1...3to-1...100(-34...100to-34...3386),inHgD@0oC (mbar)
Measurement Uncertainty (2) 0.01%FullSpan
Barometric reference 17 to 34 (575 to 1151), inHgA@0oC (mbar)
Measurement Uncertainty (2) 0.01%Reading
Vacuum reference 100-1000 mtorr
Measurement Uncertainty (2) 0.4%Reading
Altitude uncertainty
0.009% IS-50 Ps Transducer
0...32 in HgA
0.009% IS-50 Ps Transducer
0...34 in HgA
Sea level ± 2.5 ft Sea level ± 2.5 ft
29000 ft ± 3.4 ft 29000 ft ± 3.6 ft
41000 ft ± 5.7 ft 41000 ft ± 6 ft
Pressure uncertainty
0.009% IS-50 Transducer
0-32 in HgA
0.009% IS-50 Transducer
0-34 in HgA
32 ±0.0027 in Hg 34 ±0.0027 in Hg
15 ±0.0014 in Hg 15 ±0.0015 in Hg
5 ±0.0014 in Hg 5 ±0.0015 in Hg
Airspeed uncertainty
0.01% FS Qc Transducer
-1...32 in Hg
0.01% FS Qc Transducer
-1...80 in Hg
250 ± 0.12 knots 250 ± 0.31 knots
500 ± 0.05 knots 500 ± 0.13 knots
661 ± 0.03 knots 661 ± 0.08 knots
1000 ± 0.03 knots
Compensated temperature range 15 ... 45 oC
Calibration stability 1 year (all transducers)
Calibration adjustment Zero adder and span multiplier, up to 11 point linearization for each transducer.
Calibration data storage Calibration data is stored on each removable transducer.
Aviation Resolution 0.1 (0.1) ft (knots)
Pressure Resolution 4, 5 or 6 digits (selectable)
Orientationeects
(for std. and opt. Transducers) Negligible
Pressure units
psi,psf,osi,ATM,inH20@4C,inH20@20C,inH20@60F,mbar,bar,Dy/
cm2,pascal,hPa,kPa,MPa,inHg@0C,inHg@60F,mTorr,Torr,mmHg@0C,
cmHg@0C,MHg@0C,mmH20@4C,cmH20@4C,MH20@4C,mmH20@20C,
cmH20@20C,MH20@20C,MSW,ftH20@4C,ftH20@20C,ftH20@60F,inSW,
ftSW,tsi,tsf,gm/cm2,kg/cm2,kg/M2,+plus2userdenedunits(multiplier
from psi or pascal)
Aviation units Altitude:feet,meter,
Airspeedunits:knots,km/h,meter/s,mach
(1)0.009%IS-50(IntelliScale-50)=0.009%ofreadingfrom100%to50%ofmaximumpressurerangeand0.009%of50%ofmaximumpressurerangefrommini-
mumpressurerangeto50%ofmaximumpressurerangefor365days.SeeSection4.7IntelliScale.
(2)MeasurementUncertainty(k=2)includeshysteresis,linearity,repeatability,referencestandard,driftandtemperatureeectsoverthecalibratedrangeforthe
calibrationintervalspecied,withperiodicre-zeroing
.
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Operating Instructions - CPA8001 17
4.2 ControlSpecications
Stability of controlled pressure 0.002 %PressureSpan
Stability of Controlled Avionics Units
Altitude
(ft.)
Altitude Stability
(+/-ft.)
Airspeed
(knots)
Airspeed
Stability(+/-Knots)
-1870 0.56 0 4.684
0 0.59 10 1.042
5000 0.69 20 0.540
10000 0.80 30 0.363
20000 1.11 40 0.273
30000 1.58 50 0.218
40000 2.39 60 0.182
50000 3.88 70 0.156
60000 6.28 80 0.136
65000 7.99 90 0.121
100 0.108
200 0.052
300 0.033
400 0.023
500 0.017
600 0.013
710 0.009
Stability of control rate 0.05%ofrate+/-50ft/min
Pressure control rates 0.001%ofrange/secto10%ofrange/sec
Sourcepressurerequirements[media]
SourceRequirements–10%overrangeofpressuretransducer
Forsinglesupplyoption10%overtherangeofthePt/Qcpressuretransducer.
Exhaust Requirements – Vacuum source required for any control below
atmosphere.[Clean,dryair(class3instrumentairperISO8753)ornitrogen]
Minimum controlled pressure 0.05%FSor0.025psioverexhaustpressure,whicheverisgreater.
External volume recommendation Maximum:60cu.in.(1000cc)
Minimum:3cu.in.(50cc)
4.3 GeneralSpecications
Mechanical
Size See drawing on page 2
Weight 38 lbs., 17 kg
Pneumatic interface 7/16-20 Female SAE threaded ports for Supply, Exhaust and Measure/Control
ports.Hosebarbforoptionalbarometerand/orQcreference.
Overpressure protection Safetyvalves,scaledto110%offullscalenominalrangeofeachtransducer.
Filters 40micron,onallpressureportsexcepttheBarometerandQcreference.
Screen HD color touch screen
Mounting Handles are standard, 19 in. rack mount optional.
Electrical & Communications
Power supply 100-120 VAC or 200-240 VAC, 50-60 Hz
Energy Consumption Max 140 VA
Communications interface IEEE-488, RS-232 (null modem cable not required), Ethernet and USB
Environmental
Warm up 60 minutes
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18 Operating Instructions - CPA8001
Operating temperature 15 to 35 °C
Storage temperature 0 to 70 °C
Humidity 0to95%RHnon-condensing
Certications
CE-mark Conformitycerticate
Calibration
Includescalibrationcerticate(s).TheMensorcalibrationlaboratoryisac-
credited in accordance with the recognized International Standard ISO/IEC
17025:2005andalsomeetstherequirementsofANSI/NCSLZ540-1-1994.Ac-
creditation is by the American Association for Laboratory Accreditation (A2LA).
WARNING! This is class A equipment for emissions and is intended for use in industrial
environments. In other environments, e.g. residential or commercial installations, it can
interfere with other equipment under certain conditions. In such circumstances the operator
is expected to take the appropriate measures.
4.4 Transducer Removal/Replacement
WhenreplacingtransducerstheCPA8001shouldbeturnedo.
The CPA8001 transducer package can be removed from the chassis for the purpose of calibration or to
interchange transducers. Removal requires that the front be opened by loosening the captive Phillips
Head screws on the right hand side of the hinged door. For more information on transducer removal/
replacement see Section 10.2.2 in the Maintenance section.
Transducer Module
Figure 4.4 - Front cut-away view showing Transducer Module
Air Data Test Set
CPA8001
Operating Instructions - CPA8001 19
4.5 Regulator
The CPA8001 is supplied with a needle valve regulator (NVR) that is tuned for the transducer module that
is installed. A transducer module with an identical range can be interchanged with the transducer module
installed.Ifthereisaneedtoreplacethetransducermodulewithoneofadierentrangeconsultthe
factory.
4.6 Transducer Module
Thetransducermodulehastwosilicontransducersoftype:Ps/QcorPs/Pt.
Table 4.6 Transducer Type / Range / Mode / Uncertainty - Calibration Stability
Standard Transducer Module
Type Transducer Ranges Mode Uncertainty - Cal Stability
Ps 0 ... 29.5 to 0 ... 37 inHgA Absolute 0.009%IS-50-365days
Pt 0 ... 40 to 0 ... 110 inHgA Absolute 0.01%FullScale-365days
Qc -1 ... 3 to -1 ... 100 inHgD Dierential 0.01%FullSpan-365days
Air Data Test Set
CPA8001
20 Operating Instructions - CPA8001
4.7 IntelliScale
IntelliScale(IS)isa“shorthand”waytodescribeapercentofreadinguncertaintyspecication.Or,said
anotherway,IntelliScaleisdesignedtofurtherreducetheuncertaintyspecication.Itdoesthisbysplit-
tingthefullspanintwo.Itthendenestheuncertaintyofthelowerportionofthespanasapercentoffull
scale, and the uncertainty of the upper portion as a percent of reading.
FortheCPA8001theIntelliScalespecicationis0.009%IS-50.Thismeansthatthelowerhalfofthe
range(50%ofthemaximumrange)hasanuncertaintyof0.009%x50%or0.0045%ofthemaximum
range.Theupperhalf(values>50%ofthemaximumrange)hasanuncertaintyof0.009%ofthe
pressurereading.Thus,anypressurewithinthelowerportionofthepressurerangehasaxednumber
fortheuncertainty(0.0045%ofMaximumRange),whiletheuncertaintyanywhereintheupperportionof
thespanisaslidingscalenumberthatisapercent(0.009%)ofanyreading.
For example, a device with a pressure range from 0 to 32 in HgA with an IntelliScale uncertainty speci-
cationof0.009%IS-50willhaveanuncertaintyof0.0014inHg(0.009%x50%x32)onanypressure
from0psito16inHgA,andanuncertaintyof0.009%ofreading(0.009%xR)foranypressureabove16
inHgA(Seegure4.6)
50
20 40 60 80 100
Total Uncertainty
0.009% of Pressure Reading
%FS Pressure
Total Uncertainty
0.009% of 50%
of FS pressure
Figure 4.7 - IntelliScale IS-50
Alternatively,aQcdierentialtransducerwithapressurerangefrom-1to32in.HgDwith%ofFullSpan
uncertaintyspecicationof0.01%FullSpanwillhaveanuncertaintyof0.0033in.Hg(0.01%x33)onany
pressure from -1 psi to 32 in HgD.
Table of contents
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