Mensor CPA2501 Air Data Test Indicator Operating Instructions
Below you will find brief information for Air Data Test Indicator CPA2501. This instrument is a single channel altitude/altitude rate indicator (Ps only), a single channel airspeed/airspeed rate indicator (Qc only) or it can be a dual channel unit configured with a Ps channel and Pt channel or a Ps channel and a Qc channel. All of the applications and features of the Air Data Test Indicator CPA2501 are described in detail in this document.
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Air Data Test Indicator
CPA2501
Operating Instructions
Air Data Test Indicator CPA2501 PN 0018909001E • 07/2017
Air Data Test Indicator
CPA2501
!
Warning
This Warning symbol indicates that danger of injury for persons and the environment and/or considerable damage
(mortal danger, danger of injury) will occur if the respective safety precautions are not taken.
!
Caution
This Caution symbol indicates danger for the system and
material if the respective safety precautions are not taken.
i
Notice
This Notice symbol does not indicate safety notices but
information for a better understanding of the facts.
2 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
Table of Contents
1. General Information 7
1.3 FCC Radio Frequency Emission Notice 7
1.5 Software License Agreement
1.6.3 Certifications and Accreditations
2. Safety Notices
2.3 Warnings and Caution Notices
3. General Description
9
11
4. Specifications
15
4.2 Measurement & General Specifications
5. Installation
17
5.5 Remote Communication Connections
Operating Instructions - CPA2501 3
Air Data Test Indicator
CPA2501
6. Local Operation and Setup
6.2.1 Contact and Version Information Application
6.3 Application Selection and Parameter Inputs
6.4.1.1
Pressure Mode / Emulation Mode
6.4.1.2
6.4.1.3
6.4.1.4
6.4.2.1
6.4.2.2
6.4.2.3
6.4.2.4
User Base Units / Base Units Multiplier
6.4.2.5
6.4.2.6
6.4.2.7
6.4.3.1
6.4.3.2
6.4.4.1
6.4.4.2
6.4.4.3
6.4.4.4
6.4.4.5
6.4.4.6
6.4.5.1
6.4.5.2
6.4.8 Troubleshooting Application
21
4 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
6.4.10 Unlocked Service Application
7. Remote Operation
7.4.1 Serial Cable Requirements
7.9 CPA2501 Commands and Queries
7.9.1 Units Command Syntax for Measurement Units
7.9.3 SCPI Commands and Queries
7.9.4 SCPI Commands Error Messages and Error Codes
8. Options
8.1.1 Gauge Pressure Emulation
8.1.2 Absolute Pressure Emulation
46
59
8.1.4 Barometric Reference Calibration
8.1.5 Barometric Reference Specifications
8.2 External Transducers (CPT6100 and CPT6180)
8.2.1 External Pressure Transducer Connection Cable
8.5.1 Remote Calibration Kit for Internal Transducers.
8.5.2 Barometric Reference Calibration Sled
8.5.3 External Calibration Procedures
8.5.3.1
8.5.3.2
Operating Instructions - CPA2501 5
Air Data Test Indicator
CPA2501
9. Maintenance
10. Calibration
10.1
10.2
10.3
10.4
Calibration Services by Mensor or WIKA worldwide 65
64
65
10.5
10.6
10.7
10.8
10.9
10.10
11. Appendix
11.1
72
11.2
11.3
11.4
6 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
1 General Information
1.1 Warranty
All products manufactured by 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, and no affirmation of
Seller, by words or actions, shall constitute a warranty. SELLER DISCLAIMS ANY IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSES 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. The judgment of Mensor will be final as to all matters concerning condition of the product, the cause and nature of a defect, and the necessity or manner of repair.
Service, repairs or disassembly of the product in any manner, performed without specific factory permission, voids this warranty.
MENSOR MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MANUAL, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 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
The product specifications and other information contained in this manual are subject to change without notice.
Mensor has made a concerted effort to provide complete and current information for the proper use of the equipment. If there are questions regarding this manual or the proper use of the equipment, contact
Mensor at:
Mensor
201 Barnes Drive
San Marcos, Tx 78666
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
1-512-396-4200
63911 Klingenberg / Germany
tel:
1-800-984-4200 (USA only)
1-512-396-1820
email:
website: www.mensor.com
9372/132-8767
[email protected] website: www.wika.de
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.
Operating Instructions - CPA2501 7
8
Air Data Test Indicator
CPA2501
1.4 Trademarks and Copyrights
Mensor is a registered trademark of Mensor, LP. All other brand and product names are trademarks or registered trademarks of their respective companies. ©2014, Mensor, LP. All rights reserved.
1.5 Software License Agreement
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 or reverse compile the software program.
i
Notice
The software programs are provided to the end user “as is” without warranty of any kind, either express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose. The entire risk of the quality and performance of the software program is with the end user.
Mensor and its suppliers shall not be held to any liability for any damages suffered or incurred by the end user (including, but not limited to, general, special, consequential or incidental damages including damages for loss of business profits, business interruption, loss of business information and the like), arising from or in connection with the delivery, use or performance of the software program.
1.6 Mensor Service Plus
If you have problems and you don’t find the answer in this manual, contact Mensor at 1-800-984-4200
(USA only) or 1-512-396-4200 for personal assistance, or at any of the contact addresses listed on the rear cover of this manual. We are ready to help.
1.6.1 After the Warranty
Mensor’s concern with the performance of this instrument is not limited to the warranty period. We provide complete repair, calibration and certification services after the warranty for a nominal fee.
1.6.2 Calibration Services
In addition to servicing our own products Mensor can perform a complete pressure calibration service, up to 30,000 psi, for all of your pressure instruments. This service includes an accredited calibration.
1.6.3 Certifications and Accreditations
Mensor is registered to ISO 9001:2008. The calibration program at Mensor is accredited by A2LA, as complying with both the ISO/IEC 17025:2005 and the ANSI/NCSL Z540-1-1994 standards.
1.7 Packaging for Shipment
If the product must be shipped to a different location or returned to Mensor for any reason through a common carrier 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.
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
2 Safety Notices
2.1 User Responsibilities
To ensure safety, the user must make sure that:
• The system is used properly, no dangerous media are used and that all technical specifications are observed.
• The system is operated in perfect operating condition.
• This operation manual is legible and accessible to the user at the system’s location.
• The system is operated, serviced and repaired only by authorized and qualified personnel.
• The operator receives instruction on industrial safety and environmental protection, and is knowledgeable of the operating instructions and the safety notices contained therein.
2.2 General Safety Notices
i
Notice
!
Warning
The system should only be operated by trained personnel who are familiar with this manual and the operation of the instrument.
WARNING: 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 (protect from humidity, impacts, strong magnetic fields, static electricity and 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.
Extreme care must be taken with pressure connections when using hazardous or toxic media.
Repairs must only be performed by authorized service personnel.
i
Notice
Additional safety notices are found throughout this manual.
Operating Instructions - CPA2501 9
Air Data Test Indicator
CPA2501
2.3 Warnings and Caution Notices
!
Warning
WARNING: HIGH PRESSURE! High pressure gases are potentially hazardous.
Energy stored in these gases and liquids 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
WARNING: NOT EXPLOSION PROOF! Installation of this instrument in an area requiring devices rated as intrinsically safe is not recommended.
!
Warning
WARNING: POSSIBLE INJURY! The tubing, valves, and other apparatus attached to the gauge must be adequate for the maximum pressure which will be applied, otherwise physical injury to the operator or bystanders is possible.
!
Caution
CAUTION: USE THE PROPER PRESSURE MEDIUM! Use only clean, dry, non-corrosive gases unless otherwise specified by Mensor. This instrument is not designed for oxygen use.
!
Caution
CAUTION: As with most sensitive electronic equipment, switch the power switch off before connecting or disconnecting to a power source to prevent data loss. Do not position the equipment so that it is difficult to disconnect the DC power jack.
CAUTION: ESD PROTECTION REQUIRED. The proper use of grounded work surfaces and personal wrist straps are required when coming into contact with exposed circuits (printed circuit boards) to prevent static discharge to sensitive electronic components.
Additional Warning and Caution notices are found throughout this manual.
10 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
3 General Description
The CPA2501 can be a single channel altitude/altitude rate indicator (Ps only), a single channel airspeed/ airspeed rate indicator (Qc only) or it can be a dual channel unit configured with a Ps channel and Pt channel or a Ps channel and a Qc channel. In the Ps/Pt version, Qc is calculated using the equation Qc
= Pt - Ps and is displayed in a “virtual” channel. In the Ps/Qc version, Pt is also calculated using the same equation and is displayed in a “virtual” channel. Pressure in each channel can also be read in standard pressure units. An optional barometer can also be installed and displayed as a channel.
Figure 3.1 - Desk top version
3.1 Definitions
Static Pressure (Ps): The absolute pressure of still air surrounding a body. Ps is pressure that would have existed in the aircraft’s location if the aircraft had created no pressure disturbances; the atmospheric pressure. Ps is proportional to altitude. The relationship between Ps and Altitude is non-linear.
Total Pressure (Pt): The sum of the local atmospheric pressure plus impact pressure created by the aircraft moving through the atmosphere.
Impact Pressure (Qc): The pressure a moving stream of air produces against a surface which brings part of the moving stream to rest. It is the difference between the Total and Static Pressures (Qc = Pt
- Ps). Qc is proportional to the aircraft speed relative to the surrounding air (indicated airspeed). The relationship between Qc and indicated airspeed is non linear.
Qc = Pt - Ps
3.2 Features
Significant features designed into the CPA2501:
• A removable, highly stable, temperature compensated air data transducer package with Ps/Qc or Ps/
Pt configuration.
• Variant configuration: Single Ps Channel, or Single Qc Channel
• 7” Color LCD with touch screen
Operating Instructions - CPA2501 11
Air Data Test Indicator
CPA2501
• Emulation of Pt or Qc from native internal transducer package.
• Multiple languages; change the language for on-screen text and number/date formats by simply touching one of the “national flag” icons available in the setup screen.
• Desk top or rack mount
• Local Operation, or command and read remotely.
• An optional removable internal high accuracy barometric reference transducer.
• Optional external transducer: Model CPT6100 or CPT6180.
12 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
3.3 Turning On
You can confirm that your CPA2501 is operational right now. Apply power to the power connector on the rear of the instrument with the included power adapter, remove any plastic plugs from the rear panel pressure ports, and press the power switch to ON. The system will go through an initialization process, which takes about 45 seconds, and then a display will appear similar to the screen shown below.
Power Switch
ON/OFF
To see information about the configuration of your new CPA2501, touch the Information Application (App) icon (see below) on the menu and a window will appear listing the Mensor customer service contact, model number and the transducers that are installed. Press the Measure App [ ] to return to the main screen.
Information Application
3.4 Front Panel
The CPA2501 front panel includes a 7” color LCD with touch screen. Operator input is accomplished by pressing the words or App icons presented on the display. There is a single discrete on/off button and a
USB on the right hand side. The front panel also shows the model number designation and brand logos.
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Air Data Test Indicator
CPA2501
3.5 Display
The display is made up of two sections. In the main screen (“Measure Application”), the left two thirds shows the transducer channels that are configured for display, along with the air data or pressure reading, units, channel label, and any auxiliary indications that have been chosen. The right one third of the screen has Application Icons (“Apps”) for setting viewing options, transducer settings, communication settings plus a “Page Down” button [ ] that, when pressed, shows a second and third page of icons for calibration, remote communication error checking and a leak test application.
Page Down
Channel label and range
Reading
Units and Mode
Auxiliary Indications
Transducer Channels Settings Apps
Buttons, Labels and Windows: The CPA2501 touch screen has many buttons with relevant graphic icons or text which, when pressed, will open a related window where changes can be made or information viewed. Some of these buttons will toggle from one state to another, others present choices or display a numerical data entry screen. Text or icons that are displayed, but do not respond to being touched, are called labels or windows. Operators will quickly become accustomed to the particular characteristics of the frequently used buttons.
Main Screen: The main screen or “Measure Application” appears after power-up. This screen contains the channel frames and settings button. It will remain as configured after a power cycle.
Transducer Channel Frame(s): The transducer channel frames (left 2/3 of the screen) contain information specific to a channel. Up to three channels can be displayed at once, two are shown in the picture above. The channel frames are color coded with Ps channel red, Qc channel green, Pt channel Blue, and the remote channel red. The optional barometer channel is sky-blue. If only one channel is installed, a full frame will be displayed in the color of the channel connected. The channel frame contains the pressure reading, units, and any auxiliary displays that have been chosen.
3.6 Chassis Assembly
The chassis assembly is the housing for the system and the removable transducers. The system has no user-serviceable parts, and therefore the chassis should not be opened except by qualified repair personnel at Mensor or certified service locations for any reason except to change the removable transducers.
14 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
4 Specifications
Accuracy specifications presented herein are obtained by comparison with primary standards traceable to a national metrology institute or recognized international standard organization. These specifications are obtained in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM).
The calibration program at Mensor is accredited by the American Association of Laboratory Accreditation
(A2LA) as complying with both the ISO/IEC 17025:2005 and the ANSI/NCSL Z540-1-1994 standards. If there is an exception to the requirements and recommendations of Z540 during a calibration the exception is noted on the individual calibration certificate.
Mensor reserves the right to change specifications without notice.
4.1 Transducer Specification
Air Data Transducer Package Ps/Qc (CPR8001) or Ps/Pt (CPR8001)
Ps Transducer
Accuracy
(1)
Pt Transducer
0 ... 29.5 to 0 ... 37 (0 ... 950 to 0 ... 1253) in HgA @ 0 o
C (mbar)
0.009% IS-50
(2)
0 ... 40 to 0 ... 110 (0 ... 1355 to 0 ... 3725) in HgA @ 0 o
C (mbar)
Accuracy
(1)
Qc Transducer
Accuracy
(1)
0.01% IS-50
(2)
-1 ... 3 to -1 ... 100 (-34 ... 100 to -34 ... 3386) in HgD @ 0 o
C (mbar)
0.01% Full Span
Barometric reference range
17 to 34 (575 to 1151) in HgA @ 0 o
C (mbar)
Accuracy
(1)
0.01% R
Calibration Interval 365 days
Media Compatibility
Metals in contact with media
Non-metals in contact with media
6000/7000 series Aluminum, 316 SS, brass
PTFE (Teflon®), Urethane, Silicone, RTV, Silicone grease, PVC, Epoxy, Buna-N, fluoroelastomers
(Viton®)
Transducer
Reading rate
Calibration adjustments
33 readings/second
Internal zero adder and span multiplier, up to 11 point linearization for each transducer
(1)
Accuracy is defined by total measurement uncertainty with the coverage factor (k=2) and includes the intrinsic performance of the instrument (linearity, hysteresis, repeatability), the measurement uncertainty of the reference instrument, long term stability, influences of ambient conditions, drift and temperature effects over the calibrated range, with periodic zero point adjustment.
(2)
The Intelliscale (IS) specification is a percent of reading specification combined with a percent of full scale specification. For example the designation “0.01% IS-50”, simply means that the uncertainty of the transducer is 0.01% of reading above 50% of Full Scale, and 0.01% of 50% of Full Scale below 50% of the Full Scale. The 0.008% IS-33 specification is the same except the uncertainty is 0.008% and the break over from percent of reading to percent of Full Scale is at 33% of Full Scale. Same rules apply for bidirectional ranges.
Operating Instructions - CPA2501 15
Air Data Test Indicator
CPA2501
4.2 Measurement & General Specifications
Basic Instrument
Instrument
Instrument version
Dimensions
Weight
Warm-up time
Display
Screen
Resolution
Data entry
Pressure Measurement Units
Rate Units
Languages
Standard: Table top with tilt feet
Option:
-19” rack-mounting for single instrument mount.
-19” rack-mounting for dual instrument mount.
See technical drawing
12.5 lbs./ 5.7 kg (with all internal options)
Approximately 15 minutes
7” color LCD
Selectable from 4 to 6 digits, depending on range and units
Touch screen keypad 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, g/cm
2
, kg/cm
2
, kg/m
2
, % of Range, + plus 2 user defined units (multiplier from psi, bar or pascal)
/sec., /min., /hr., /3-hr
English, German, Spanish, French, Italian, Portuguese, Polish, Russian, Chinese,
Japanese, Korean
Off, Low, Normal (default), High Measurement filters
Connections
Number of integrated transducer
(selectable)
Pressure connections
Pressure adaptors
Standard: 1 reference transducer
Optional: 2nd reference transducers, external transducer, internal barometric reference
Ranges ≤ 6015 psi: 7/16 - 20 female SAE/MS (adapters provided)
Standard: 1/8 in. FNPT
Optional: 1/4 inch tube, 6 mm tube, 1/4 in FNPT, 1/8 in. FBSP.
110 % FS typical, optional external relief valves are available Overpressure limits
Voltage supply
Power input requirements
Switching power supply
Permissible ambient conditions
Storage temperature range
Operating environment
Operating temperature range
Operating Altitude
Communications
Remote interface
Command sets
100-120 or 200-240 VAC, 50-60Hz, 24VA max
Output: 12 VDC, 1.7 A (includes 4 region specific plugs adapters)
0 to 70 deg C
0 ... 95 % RH (relative humidity, non-condensing)
15 ... 45 deg C
<3048 meters (10,000 ft)
IEEE 488, RS-232, USB and Ethernet
Mensor, WIKA SCPI
CE conformity and certificates
CE compliance
Calibration
EN61326-1:2013 electromagnetic compliance
EN61010-1:2010 safety/CB scheme
Calibration certificate per ISO/IEC 17025:2005. Accreditation is by the American
Association for Laboratory Accreditation (A2LA).
16 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
5 Installation
5.1 Unpacking the Instrument
In addition to functional testing, each unit is inspected for appearance prior to leaving the factory. Upon receipt, please examine the instrument for shipping damage. Report any apparent damage to the carrier immediately.
In addition to this manual you should have:
• CPA2501 Air Data Test Indicator;
• Power Supply;
• Fitting adapters ordered;
• Any accessories ordered;
• An envelope containing the calibration certificate.
Operating Instructions - CPA2501 17
Air Data Test Indicator
CPA2501
5.2 Dimensions (inches)
Front view
Desk top case
Side view
18
Remote Transducer connection
RS-232
USB (device)
USB (host)
Ethernet port
Single mount - Front view
19” rack mount
Dual mount - Front view
IEEE-488
Rear Panel
Baro ref port
(baro ref option)
Qc Reference
Power
Qc or Pt Port
Ps Port
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
5.3 Mounting
The instrument can be set up on a desk top or it can be rack-mounted. Rack mount hardware is optional on the CPA2501 (see Section 5.2 Dimensions and Section 8, Options).
The special sensors used in the CPA2501 are relatively insensitive to tilt and vibration. However to further assure stability and accuracy, avoid mounting the instrument on surfaces subject to excessive motor or machinery vibration.
5.4 Rear Panel
A single dual transducer is installed in the CPA2501 chassis consisting of a Ps/Qc or a Ps/Pt transducer set. The CPA2501 is also available in a single channel configuration with a Ps (altitude) or Qc (airspeed) channel only. In the upper right corner is a hose barb fitting which is connected to the baro ref if installed.
Positioned on the left side is a remote transducer connection, the RS-232, Ethernet, IEEE-488, USB device connections for communication, the USB host connection and the 12 VDC power input.
Figure 5.4 - Rear Panel
5.4.1 Pressure Connections
i
Notice
When making up a connection to an o-ring adapter fitting port use a back-up wrench to prevent over-stressing the threads in the manifold block.
The pressure ports on the rear of the CPA2501 are female 7/16 - 20 SAE/MS straight threads per
MS16142 and SAE J514 table 14. Connected adaptors require a tube fitting boss seal with an o-ring per
MS33656. Mensor can provide a variety of adapter fittings (see Section 8, Options) with the instrument.
Do not use sealant on fittings sealed with an o-ring. The integrity of each seal is particularly important since even microscopic leaks can cause errors in measurements.
5.4.2 Pressure Port
The CPA2501 will precisely measure the altitude or airspeed corresponding to the pressure connected to the pressure port up to the full scale range of the transducer installed.
Operating Instructions - CPA2501 19
Air Data Test Indicator
CPA2501
5.4.3 Qc Reference Port
The reference port is available on Qc units. This port must be connected to the Ps pressure side, or both open to atmosphere for an accurate Qc reading . This is due to the common mode correction. The correction is used to remove offsets of both zero and span when the reference pressure is changed. The correction utilizes the Ps channel’s pressure value. In a Ps/Pt transducer, this port is plugged.
5.5 Remote Communication Connections
See Section 7, Remote Operation, for connections and commands for operation over IEEE-488, Ethernet, USB or RS-232 ports.
5.6 Power Up
Apply power to the power connector on the rear of the instrument using the power adaptor included, and switch the power switch on the front of the unit ON. The instrument will go through an initialization process and system check. As soon as the system check is completed the system will default to a screen similar to the one shown in Section 6.1.2 - Display Screen Features. The main measurement screen may be configured in many different ways but initially it will be in a default configuration. Subsequently, the unit will power up in the configuration that it was in when last powered off. Allow at least 15 minutes of warm up before performing critical pressure measurements.
20 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
6 Local Operation and Setup
6.1 General Operation
This section describes the procedures for operating the CPA2501 from the front panel. Instructions for operating the device remotely from an external computer are covered in Section 7, Remote Operation. By following the procedures provided in these two sections and Section 10, Calibration, you can expect your
CPA2501 to deliver maximum accuracy and dependability for many years of useful service.
6.1.1 Setup Applications
Configuration of the CPA2501 is achieved by changing settings accessed through the Application (“App”) buttons. Local operation is accomplished by observing the data presented in the display. The appearance and functionality of the display can be changed by pressing the App button for the related function. After an app has been chosen, a set of related parameters will appear on the left. After choosing one of these parameters, a set of selections related to that parameter will appear on the right or a data entry keypad.
The desired selection or data can be entered here.
6.1.2 Display Screen Features
The screen shown below provides a brief description of the features of a Ps/Qc display after initialization. The left two thirds of the display contains the area where information is displayed (in this case the
Measure Application) and the right one third contains the selection icons for each application. Channels are color coded: Ps channel red, Qc channel green, Pt channel Blue, and the remote channel red. The optional barometer channel is sky-blue. If only one channel is installed, a full frame will be displayed in the color of the channel connected. Color coding persists throughout all channel-specific screens. A zero or tare button and auxiliary displays (auxiliary units, rate and peak) will appear in the Measure App if activated. All of the CPA2501 screen features are described in more detail throughout this manual.
Channel label
Reading
Measurement Units
Operating Instructions - CPA2501
App Display / Parameter Selection
Figure 6.1.2 - Display Screen Features
App Selection /
Data Entry
21
Air Data Test Indicator
CPA2501
6.2 Initial Setup
Section 6.2.1 and 6.2.2 are provided first so that the operator can initially check the information screen to verify the installed components and to change the language if needed.
6.2.1 Contact and Version Information Application
Press this application button to display Mensor contact, installed transducer, instrument and software version information.
Figure 6.2.1 - Information
6.2.2 Language Selection
Pressing the settings application button will open a screen where the language, display brightness, volume, user base units/multiplier and configuration loading/saving, can be changed. The current language selections available are shown in the table below. Additional language choices will appear on the screen after pushing the Page Down button [ ]:
Language
English
German
French
Spanish
Italian
Chinese
English
German
French
Spanish
Portuguese
Portuguese
Russian
Korean
English
French
Polish
Japanese
Country
USA
Germany
France
Spain
Italy
China
Great Britain
Switzerland
Switzerland
Latin America
Portugal
Brazil
Russia
Korea
Canada
Canada
Poland
Japan
22 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
6.3 Application Selection and Parameter Inputs
The application selection area on the right one third of the screen (see Figure 6.1.2 - Display Screen Features) is the area where setup, information and calibration Apps can be chosen. A second and third page of application selections can be accessed by pressing the page down button [ ]. A series of vertically placed circles on the center right indicates the active page by a larger circle. As each App is chosen, related application parameters will appear on the left two thirds of the screen along with the name of the application, and a reduced size icon in the top title section . When a parameter is chosen, related selections, sliding scales or a data entry key pad will appear in the input area on the right where the application selection buttons were previously displayed. An example of each type of input is shown below. To return to the App selection menu, simply press the menu button [ ] above the input area. The purpose and use of each selection and menu is intuitively apparent and will become second nature with minimal exposure to the menu structure.
Menu Button Input Title
App Title
Page Down
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6.4 Applications
6.4.1 Measure Application
The Measure App is the normal operation screen referred to in previous instruments as the
‘main screen’. This application is different from the others in that it is not use to setup the configuration but is used to monitor the pressure (altitude and/or airspeed) applied to the installed transducers.
The screen in figure 6.4.1-A shows the basic Measure App in Air data (Ps/Qc) mode. The units button is always present in each channel. When the units button is pressed on the Ps channel a selection of feet or meters plus a button for the selection of imperial and metric units will be displayed on the right (figure
6.4.1-B); notice that the Units button has a lighter background when the selection menu is active. When the units button is pressed on the Qc Channel a selection of Knots, MPH, Km/hr and m/s is displayed, plus the same selection of imperial or metric units. If a barometric reference is installed, the barometric pressure will be displayed in the lower right hand corner of the screen.
Units Button
Figure 6.4.1-A Basic Measure App
Units Selection for Ps
24
Figure 6.4.1-B - Units Selection
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
6.4.1.1 Pressure Mode / Emulation Mode
The Mode button is active only if the CPA2501 is not in Air Data Mode and there is an optional barometric reference installed. Otherwise, the mode button becomes a label (figure 6.4.1.1) indicating the native mode of the transducer (absolute or gauge). When an optional barometric reference is installed, a native gauge transducer can emulate absolute pressure using the barometric reference. Alternatively, a native absolute transducer can emulate gauge pressure. Emulation can be activated simply by pressing the
Mode button.
Without a barometer the mode button becomes inactive
Figure 6.4.1.1 - Mode Label
6.4.1.2 Auxiliary Displays
The screen in figure 6.4.1.2 shows all of the possible auxiliary display items that can be included in the
Measure App. In addition, each channel can contain one of two possible calibration functions. The auxiliary display item includes “Peak”, “Rate” and “Alternate Units”. Calibration functions are either a “Zero” button or a “Tare” button. These auxiliary features will appear in the Measure App when selected from the
Transducer App (section 6.4.4).
Operating Instructions - CPA2501
Figure 6.4.1.2 - Measure App with auxiliary displays
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Auxiliary buttons can be placed in three different parts of the screen depending on how they are set in the
Transducer Application. Each auxiliary display can be modified by pressing the displayed button.
Peak: Pressing the Peak button will reset the upper and lower peak value to the current reading, subsequent negative or positive divergence from that reading will be recorded in the button.
Rate: Pressing the Rate button will display a choice of time rate units for the rate denominator.
Units: Pressing the Auxiliary Units button will display the same set of units available for the primary units.
Pressing any of these units will change the auxiliary units to that chosen unit.
6.4.1.3 Zero Button
If the Zero Calibration function has been chosen in the Transducer App (section 6.4.4), then the Zero Cal
Button [ ] will appear in the Measure App. If the channel is measuring absolute pressure, and the
Zero Cal Button is pressed, a keyboard will appear to allow entry of a known pressure (from an appropriate standard) for a single point calibration. If the channel is in Qc Mode, measuring gauge pressure, or in gauge emulation mode, pressing the button will calculate an offset and set the current reading to zero.
For all of these gauge modes, the offset value will not be saved to the transducer but will only be active temporarily. After exiting the emulation mode or after a power cycle, the temporary offset adjustment will be cleared. The zero adjustment for an absolute channel, not in emulation mode, will be saved to the transducer as if single point calibration had been performed.
Figure 6.4.1.3 shows Ps and Qc channels in Ps/Qc pressure mode, the zero cal function has been enabled for both channels and there is a barometric reference installed. The screen on the left shows both channels with zero buttons. The screen on the right shows the same two channels, but the zero button on the absolute channel has been pressed, showing the keypad enabled to accept a new single point calibration value.
Figure 6.4.1.3 - Zero Button, Gauge - Absolute
The background color of the zero button will momentarily change to a lighter color as the zero calibration is performed then will revert back to a darker color when complete.
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6.4.1.4 Tare Button
If the Tare calibration function has been chosen in the Transducer App (section 6.4.4), then the Tare
Button [ ] will appear in the channel screen. The Tare button and the Zero Button cannot appear on the screen at the same time, in the same channel. When the Tare button is pressed, the instrument will subtract the current pressure reading (the tare pressure) so that the indicator displays zero. Subsequent deviations in pressure will be relative to the tare pressure. Notice in the figure below that, when active, the back ground of the tare button is lighter than the channel background, when not active the button background is darker than the channel background.
Tare button, active.
Tare button, inactive.
Figure 6.4.1.4 - Tare Button
Pressing the tare button again will deactivate the tare and change the pressure indication back to the reading corresponding to the calibrated output of the transducer. An active tare will revert to a deactivated state after a power cycle.
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6.4.2 Settings Application
The Settings App is used to set up general settings for the display. Settings parameters include
Language, Brightness, Volume, User 1 base units, User 1 multiplier, User 2 base units, User 2 multiplier, Barometer Units, Instrument Mode, and Configuration. Figure 6.4.2 shows these parameters as indicated when the Settings App has been chosen. As each parameter is pressed, an input screen will appear on the right where selections can be made.
The Settings App provides a place to change the language, display brightness, volume, user units, and barometer units and instrument mode. Configuration settings of the unit can also be saved within this application plus the default configuration can be activated.
Figure 6.4.2 - Settings application
6.4.2.1 Languages
The Language parameter provides a selection of different languages. Once a language is chosen all words within all menus will appear in the chosen language and the radix character (decimal mark) will change from a dot (.) to a comma (,) depending on the language chosen.
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Figure 6.4.2.1 - Languages
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CPA2501
6.4.2.2 Brightness
The Brightness setting provides a sliding scale to increment the screen brightness in all screens. Sliding your finger along the bar graph or touching anywhere in the bar graph will change the brightness of the screen. After the setting is made and your finger is removed from the screen the menu will revert back to the basic settings menu.
Figure 6.4.2.2 - Brightness
6.4.2.3 Volume
The Volume setting provides a way to turn on or off the touch screen audio feedback.
Figure 6.4.2.3 - Volume
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6.4.2.4 User Base Units / Base Units Multiplier
When choosing a unit of measure from the Measure Application (main screen), standard units can be chosen in addition to two user defined units. User units 1 and 2 are defined in the Settings App using
“User 1 base units”, “User 1 multiplier” and / or “User 2 base units”, “User 2 multiplier”. For example, if the display of one atmosphere (atm) was needed, then psi could be chosen as the “User 1 base unit” and the “User 1 multiplier”, in this case, would be 0.068045. When set this way and the user 1 unit has been chosen, the user 1 unit will now display the pressure in atm.
Figure 6.4.2.4 - User base units / Base units multiplier
6.4.2.5 Barometer Units
When the Barometer Units Parameter has been chosen, a list of Imperial or Metric units is presented on the right side of the screen. Any of these units can be chosen from this list for the barometric readout that can be seen on the bottom right of the Measure App. In addition, the barometric reading can be displayed as a channel (see Frames Application, Section 6.4.3).
30
Figure 6.4.2.5 - Barometer units
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CPA2501
6.4.2.6 Instrument Mode
The Instrument Mode is a quick and easy way to change configuration to three different standard configurations: “Air Data”, “Ps/Qc Pressure”, or “Ps/Pt Pressure”. Air Data mode will display readings in altitude and airspeed units, Ps/Qc Pressure mode and Ps/Pt Pressure mode will display the parameters in pressure units. If the installed transducer is a Ps/Qc transducer then the Pt value will be emulated. If the installed transducer is a Ps/Pt then the Qc value will be emulated. Emulation values are mathematically determined using the formula Pt = Ps + Qc or Qc = Pt - Ps.
Figure 6.4.2.6, Instrument Mode
6.4.2.7 Configuration
Configuration is the last parameter in the Settings App. It allows the operator to save instrument settings and load them, as needed in the future. Parameters that are set in all the Apps can be saved using the
Configuration “Save” button and recalled using the Configuration “Load” button. Simply set all desired parameters then go to Settings-Configuration, press one of the numbered Configuration buttons then press the “Save” button. This will save the current configuration in that button. To reload a saved configuration at a later time, go to Settings-Configuration and press the numbered configuration button corresponding to the saved configuration and then press the “Load” button.
Figure 6.4.2.7 - Configuration
The instrument default configuration can be activated simply by pressing the “Default” Button.
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6.4.3 Frames Application
The Frame App allows the user to select the number and order of the transducer channels displayed in the Measure Application. One, two or three channels can be displayed at a time.
Typically, in air data mode, Ps would be on top and Qc or Pt would be on bottom. The order and number of channels displayed can be defined in the Frames Application. In addition the optional barometric reference transducer and/or a remote transducer can be displayed as a channel.
Figure 6.4.3 shows the unit in dual frame format with the Frame Format set to display the readings from two transducers (In this case Ps and Qc).
Figure 6.4.3 - Frames Application
6.4.3.1 Frame Format
The Frame format button sets the display in the Measure Application to Single Frame, Dual Frame or
Triple Frame. Figure 6.4.3.1 shows the available selections for the Frame Format parameter.
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Figure 6.4.3.1 - Frame Format
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CPA2501
6.4.3.2 Frames Channel
The channel setting in the Frames application provides a way to choose which channel(s) appears and in what order within the Measure Application (Main Screen). Any installed transducer channel or an emulated channel can be displayed in the Measure Application. In figure 6.4.3.2, the Dual Frame format is set in the Frames format parameter, Ps is set as the top frame and Qc is set as the bottom frame. Ps,
Qc, Pt, Channel C (the remote transducer if connected) or the optional barometer could be placed in any available position. If the Single or Triple frame format is chosen then the channels will appear as shown in each of the respective frame position sets.
Frame positions sets:
Single Frame
Dual Frame
Triple Frame
Resulting view in the Measure Application
Figure 6.4.3.2 - Frames Channel
In Figure 6.4.3.2-A, the Channels have been set for each frame format and the frame format has been set to “Frame triple”. In the Measure App the resulting channel position will be: PS on top, Pt in the middle and Qc on the bottom. The barometer reading (if installed) will appear as a selectable channel but the reading will always appear at the bottom right in the Measure App.
Operating Instructions - CPA2501
Figure 6.4.3.2-A - Example channel frame settings
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6.4.4 Transducer Application
For each transducer, the Transducer Application provides a way to set the filter for the reading to reduce fluctuations due to electrical noise, and to set the resolution of the reading. In addition, the auxiliary display functions and calibration function can be specified here.
Figure 6.4.4 - Transducer Application
6.4.4.1 Transducer Channel Selection
Transducer parameters are identical for all channels but can be set differently in each channel. Figure
6.4.4.1 shows two displays where channel Ps and Qc have been selected. Notice that the Qc Transducer has Peak, Rate and Units selected as Auxiliary Display 1, 2 and 3, respectively.
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Figure 6.4.4.1 - Transducer Channel Selection
Operating Instructions - CPA2501
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CPA2501
6.4.4.2 Qc or Pt Emulation
A Ps/Qc transducer can emulate a Pt Channel and A Ps /Pt transducer can emulate a Qc channel both using the formula Pt = Ps + Qc. In the Transducer Channel selection menu the native transducers are always listed first and the Emulated Channel is listed last. Figure 6.4.4.2. shows the Ps and Qc channels listed in the top two positions and the Pt listed last. This indicated that the native transducer in this device is a Ps/Qc transducer and the Pt channel is emulated.
Figure 6.4.4.2 - Transducer Delta Emulation
6.4.4.3 Transducer Filter
The Filter is an electronic filter to smooth out the readings. Because of differences in resolution, greater filtering may display a more stable reading for some pressure units. Turn off the Filter by selecting “Off”, select varying degrees of filtering for the current units by selecting “Low”, “Normal” or “High”.
Operating Instructions - CPA2501
Figure 6.4.4.3 - Transducer Filter
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6.4.4.4 Transducer Resolution
The Resolution of each transducer Channel can be set in the Transducer Application using the resolution
Parameter. The resolution can be set to 4, 5 or 6 digits.
Figure 6.4.4.4 - Transducer Resolution
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6.4.4.5 Auxiliary Displays
The Transducer Channel Auxiliary Display(s) can be set in the Transducer App by selecting Auxiliary Display 1, 2 or 3 and selecting from, None, Peak, Rate or Units. Figure 6.4.4.5-A shows auxiliary display 1, 2 and 3 set for units, peak and rate respectively. Auxiliary displays will appear in the Measure App as seen in Figure 6.4.4.5-B.
Figure 6.4.4.5-A - Transducer channel aux displays set to Units, Peak and Rate
Figure 6.4.4.5-B - Auxiliary displays as seen in the Measure App
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6.4.4.6 Cal Function
The Transducer Cal Function presents a choice of None, Tare or Zero. Choosing Zero will enable the Zero
Cal Button [ ] in the Measure App. Choosing Tare will enable the Tare Button [ ] in the Measure
App. The Tare button and the Zero Button cannot appear on the screen at the same time, in the same channel. See section 6.4.1.3 and 6.4.1.4 for operation of the Zero and Tare buttons in the Measure App
(main screen).
Figure 6.4.4.6 - Cal Function
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6.4.5 Remote Application
With the remote application you can select the remote command set for all remote interfaces. The GPIB address, Ethernet network parameters and Serial parameters can also be set here. If DHCP is enabled, as is the case in Figure 6.4.5, the IP address, Netmask and Gateway are greyed out and locked, these are controlled by the DHCP server.
Details about the Remote Operation (command sets, cable requirements, etc.) can be found in Section 7,
Remote Operation.
IEEE-488
Ethernet
Serial
RS-232 or
USB
Figure 6.4.5 - Remote Application
6.4.5.1 Remote Command Set
The remote command set parameter provides a choice of the Mensor command set or the WIKA SCPI command set. Both sets of commands are listed in Section 7, Remote Operation.
Operating Instructions - CPA2501
Figure 6.4.5.1 - Remote Command Set
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6.4.5.2 Remote Communication Settings
The remainder of the Parameters in the Remote Application present the choice of a numeric entry, a numeric address entry, or a radio button selection. The parameters that require a numeric entry will present a numeric keypad with min and max limits for the variable. The parameters that require a numeric address (for example an IP address) will also present a keypad. Address entries should conform to the format of the parameter selected. The three screens below show examples of each type.
Numeric entry
Numeric address entry
40
Radio button selection i
Setting the Ethernet DHCP to yes will have a short delay while the DHCP server is contacted.
If a DHCP server is not found, an error will be indicated. If DHCP is enabled, the IP address, Netmask and Gateway are greyed out and locked, these are controlled by the DHCP server.
Figure 6.4.5.2 - Remote Communication Settings
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CPA2501
6.4.6 Info Application
The Info application displays information about the instrument, including:
• Mensor address, and email
• Model number, serial number and operating software version
• Transducer model number, serial number, range, software version
Figure 6.4.6 - Info Application
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6.4.7 Leak Test Application
The Leak Test application provides a way to check the system for leaks into or out of the system.
This App is found on the second page of the Apps menu accessed by pressing the page down button [ ].
The operator defines a leak by setting the Time parameter and the Delta parameter. With the system pressurized to a predetermined level, the leak test is initiated by pressing the Start button. If the change in pressure exceeds the Delta parameter before the allotted time in the Time parameter, then the Leak
Test App will return a red status indication showing the actual difference (delta) in pressure recorded during time period set in the leak test, indicating a “failed” test. Otherwise it will return a green status indication showing that the delta was not exceeded for the time period, indicating a “passed” test. See
Figure 6.4.7-A for examples of a failed and a passed test.
Figure 6.4.7 - Leak test
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Figure 6.4.7-A - Leak test fail (left) & Leak test pass (right)
Operating Instructions - CPA2501
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CPA2501
6.4.8 Troubleshooting Application
The Troubleshoot Application will display information about error conditions and remote communications. Within the troubleshoot screen (Figure 6.4.8-B), push the Error button to display any errors that have occurred in the instrument due to a communication or network error. Push the Remote button to show commands and responses that have been sent over the remote communication connection.
If there are any errors in the error queue an error symbol [ ] will appear in all screens (Figure 6.4.8-
A) of the instrument. Pressing this error button from any screen will open the Troubleshoot application where the error can be viewed.
Operating Instructions - CPA2501
Figure 6.4.8-A - Error indication
Figure 6.4.8-B - Troubleshoot error and remote
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6.4.9 Service Application
The service application is a password protected area where calibration of all connected transducers can be accomplished. In addition, this is where the password for entering this area can be changed.
Figure 6.4.9-A - Service Application (locked)
Press the Enter button to show the numeric keypad to enter a password. This will unlock other applications. Default password is 123456. Enter 123456 and press the check mark [ ] to unlock the Service
Application.
44
Figure 6.4.9-B - Service Application (Enter Password) i
Note: The default Password is 123456. After entering this for the first time, the password can be changed.
Operating Instructions - CPA2501
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CPA2501
6.4.10 Unlocked Service Application
After the Password has been entered, the unlocked Service Application will appear (Figure 6.4.10). To re-lock this screen, press the lock button.
Figure 6.4.10 - Unlocked Service Application
From the Unlocked Service Application, the Password can be changed by pressing the Enter button next to the Change Password label. This will open a keypad where a new password can be entered and accepted by pressing the Check Mark [ ]. i
Note: Please make note of a password change and save the new password in a secure
location.
The Unlocked Service Application is the access point to all calibration screens described in Section 10 of this manual.
i
Note: Recommended calibration setup and explanation of calibration screen applica-
tions is covered in Section 10 of this manual.
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7 Remote Operation
Use the screens in Section 6.4.5 Remote Application to set the operating parameters for the instrument command set, Ethernet, Serial (RS-232) and IEEE-488 (GPIB) information.
7.1 Command Set
Command Set button – Users’ can select which model remote protocol they would like to emulate for simulation and testing purposes. Selections may include the following or may be added per customers’ specifications:
• Mensor (default)
• SCPI WIKA (The SCPI WIKA mode emulates the WIKA command set in SCPI format.)
7.2 IEEE-488
IEEE-488 address button – Allows the user to set the GPIB address by inputting a numeric value utilizing the touch screen.
7.2.1 IEEE-488.2 Commands
Command or Query
*IDN?
*RST
*TST?
*OPC
*WAI
*CLS
*ESE
*ESE?
*ESR
*ESR?
*SRE
*SRE?
*STB?
Response / Function
Returns identification string
Reset to known state (default+psi)
Returns 1
Operation completed
Returns operation completed state
Clear status and error queue
Enable status event
Returns enable status even value
Event status register
Returns even status register value
Service request enable
Returns service request enable value
Returns status byte
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CPA2501
7.3 Ethernet
The Ethernet function allows the user to set the following by inputting a numeric value in each separate field:
• IP
• Netmask
• Gateway
• Port
• DHCP settings
Set the Ethernet communication parameters as described in Section 6.4.5.
!
Caution
CAUTION: Please contact your network administrator for proper settings.
!
Caution
CAUTION: Please consult your computer resources department prior to connecting this instrument to your network to verify there are no conflicts with existing IP addresses.
The Ethernet communication port allows the CPA2501 to communicate with computers using 10/100
Based-T specifications.
Before using Ethernet communication, four parameters must be set up: IP, Netmask, Gateway, and Port.
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7.4 Serial
Set the Serial communication parameters as shown in Section 6.4.5 Remote Application. The serial communication port allows the CPA2501 to communicate in RS-232 format with computers, terminals, PDAs, or similar hosts.
These parameters should be set to match your host computer. Default settings are: 57600 baud, 8 data bits, 1 stop bit, no parity, and no echo.
If echo is ON, the CPA2501 will immediately echo back characters sent over the serial port. The Serial function allows the user to set the RS-232 serial port settings by selecting from the choices provided:
• Baud
9600
19200
38400
57600
115200
• Data Bits
7
8
• Stop Bits
1
2
• Parity
Even
Odd
None
• Echo settings
On
Off
7.4.1 Serial Cable Requirements
RS-232 communications are transmitted over a three conductor, shielded cable terminated in a standard
DB9 connector on the instrument end, and a different gender connector on the host end. The proper pinouts are shown in the following illustration.
!
Caution
CAUTION: When replacing an older model DPG 2100, the serial cable should be replaced with a straight cable.
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7.5 Mensor Command Set
The Mensor command set is the default on the CPA2501. For queries (ending with a ?), the Data column represents the response of the CPA2501. All response strings begin with a space character or an “E” representing that there is an error in the error queue. All response strings are terminated with a <CR> and a
<LF>. The error queue holds the last 10 errors identified.
For all commands (no ?), the data column represents the required parameters to be sent to the CPA2501 following the string in the command column. For any command that requires multiple parameters to be sent, the parameters must be separated by commas.
7.6 Command and Query Format
Commands must be sent in ASCII format and terminated with either a carriage return (<cr>), linefeed
(<lf>), or both. Commands are not case sensitive. Each query returns a response. If an error is detected the response will include an error flag.
Command or Query field: Will lead with an “E” to indicate an error. Unless otherwise specified, commands are typically converted to queries by appending a question mark to the command. Table 7.9 lists all of the CPA2501 command or query keywords.
Data field: The data field is either in ASCII {string} or numeric {value} form. In the case of multiple data fields, commas are required to separate the fields. Queries do not have a data field. String (text) or value
(numeric) data are acceptable in any of the following formats:
Examples of {string} data: ON, OFF, mBar, inHg
Examples of {value} data: 1, 1.0, -5.678, 25.68324e-5
7.7 Command Set Definitions
In this manual a data entry made up of alpha characters is defined as a string, as opposed to data containing only numbers, such as “Enter 1 for ON or 0 for OFF” where 1 and 0 are defined as values.
Command: Any command or query listed in Table 7.9. For commands that take boolean data the following strings are acceptable:
0 1
False True
No Yes
Off On
Separator: Space (SP).
Data: ASCII representations of numbers, {value}, or alpha characters, {string}, data as defined above.
When sending code a literal variable replaces the brackets and the enclosed character(s) shown in the following examples.
Termination: Linefeed (LF) or carriage return (CR) is used to signal the end of a command statement.
For IEEE-488.2 operation “EOI” is an acceptable alternative.
Always send commands in one of the following formats:
1. [Command] [Termination];
2. [Command] [Separator] [Data] [Termination];
3. Queries are special instructions in the form: [Command?] [Termination] where the question mark, “?”, immediately precedes the terminator.
When a valid query is received, the CPA2501 will return {data} terminated by CR and LF. Floating point data is returned in the current engineering units in exponential format.
Operating Instructions - CPA2501 49
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7.8 Output Formats
Pressure readings are returned in exponential notation in a format according to the OUTFORM command as follows. Outform applies to both pressure channels.
1. <sp> pressure value <cr><lf>
2. <sp> pressure, units number,STANDBY <cr><lf>
3. <sp> pressure, pressure rate <cr><lf>
4. <sp> pressure, minimum peak, maximum peak <cr><lf>
7.9 CPA2501 Commands and Queries
Table 7.9 lists all of the current CPA2501 commands and queries.
i
Notice
Channel specific commands are sent to only the active channel.
See ‘CHAN’ command.
Optional emulation modes are available in which a CPA2501 can emulate remote functions of different brands of pressure gauges. Please contact Mensor for more details.
Command
?
A?
AR?
Acquire?
Address
Address?
Asset_tag
Asset_tag?
Table 7.9 - CPA2501 Commands and Queries
Data
See Table Below
<sp>n.nnnnne+nn<cr><lf>
<sp>n.nnnnne+nn<cr><lf>
15 char string.
Ex:
Acquire? Test_stand_1
Returns:
<sp>(YES or NO), CCC…
CCC<cr><lf>
1-31
<sp>nn<cr><lf>
16 char string
<sp>sssssssss<cr><lf>
Response/Function
Returns a reading in the current output format (Sec. 7.8)
Returns the A channel pressure reading
Returns the A channel rate
This command is used when multiple computers would like to control the instrument.
Yes if acquisition is successful.
No if instrument is being controlled with another computer.
See: Release? and Unlock
Sets the GPIB Address
Returns the GPIB Address
General purpose string for customer use.
Return customer asset tag string
B?
BR?
Baro?
<sp>n.nnnnnE+nn<cr><lf>
<sp>n.nnnnnE+nn<cr><lf>
<sp>+n.nnnnnE+nn<cr><lf>
Returns the B channel pressure reading
Returns the B channel rate.
Returns reading from barometric transducer or “NO BAROMETER” if one isn’t installed
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
C?
<sp>n.nnnnnE+nn<cr><lf>
CR?
Calculate_as_found_linearity
Caldisable
<sp>n.nnnnnE+nn<cr><lf>
YES,NO
Caldisable?
Cerr
Chan
Chan?
Chanfunc
<sp>(YES or NO)<cr><lf>
None
A, B, C, D
<sp>X<cr><lf> n, func<cr><lf>
Chanfunc? <n>
Cmdset
Cmdset?
D?
DR?
Decpt?
Default
DHCP
DHCP?
DOC
DOC?
DOM?
Error?
Filter
Filter?
Gasdensity
Gasdensity?
<sp>CCCCC…<cr><lf>
Mensor, SCPI
<sp><CCCCC...<cr><lf>
<sp>n.nnnnne+nn<cr><lf>
<sp>n.nnnnne+nn<cr><lf>
<sp>n<cr><lf>
None
ON or OFF
<sp>(YES or NO)<cr><lf> mm/dd/yyyy
<sp>mm/dd/yyyy<cr><lf>
<sp>mm/dd/yyyy<cr><lf>
<sp> text description <cr><lf>
OFF, LOW, NORMAL, HIGH
<sp> (filter)<cr><lf>
Value in lb/cuft, or “NITROGEN” or
“DRYAIR”
<sp>+n.nnnnnE+nn<cr><lf>
Returns the C channel pressure reading
Returns the C channel rate
Calculate linearity slopes and intercepts from true/actual pressures
Sets whether or not the ability to calibrate the transducers is disabled
Returns whether or not the ability to calibrate the transducers is disabled
Clears the error queue
Sets the active channel
Returns the active channel
Sets the auxiliary display function where “n” is the auxiliary display to be set (1,2, or 3) and “func” is the function
(none, peak, rate, units)
Returns the auxiliary display function specified by “n” for the active channel
Activates remote command set for instrument emulation modes
Returns active command set identifier
Returns the D channel pressure reading
Returns the D channel rate
Returns the number of decimal points
(see Resolution)
Sets the default values
Reserved for DHCP setup
Reserved for DHCP setup
Sets the date of cal for the active channel’s transducer
Returns the date of cal for the active channel’s transducer
Returns the date of manufacture
Returns the next error in the error queue
Sets the reading filter 0, 80%, 92%,
95%
Returns the reading filter
Sets the head pressure gas density in lb/cuft
Gets the head pressure gas density in lb/cuft
Operating Instructions - CPA2501 51
IP
IP?
Keylock
Keylock?
List?
Listcal?
Listrange?
Localgravity
Localgravity?
Netmask
Netmask?
Outform
Outform?
Air Data Test Indicator
CPA2501
Gastemp
Gastemp?
Gateway
Gateway?
Height
Height?
Id?
Port?
Ps
Ps?
Pt
Pt?
Qc
Peakmax?
Peakmin?
Peakreset
Port
Value in degrees F
<sp>+n.nnnnnE+nn<cr><lf> nnn.nnn.nnn.nnn
<sp>nnn.nnn.nnn.nnn<cr><lf>
Value in inches
<sp>+n.nnnnnE+nn<cr><lf>
<sp>MENSOR,
CPA2501, ssssss, v.v.vv<cr><lf> nnn.nnn.nnn.nnn
<sp>nnn.nnn.nnn.nnn<cr><lf>
<sp>n.nnnnnE+nn<cr><lf>
<sp>n.nnnnnE+nn<cr><lf>
None nnnnn
<sp>nnnnn<cr><lf>
Sets the head pressure gas temperature
Gets the head pressure gas temperature
Sets the Ethernet gateway address
Gets the Ethernet gateway address
Sets the head pressure height in inches
Gets the head pressure height in inches ssssssss is the alphanumeric serial number,v.v.vv is the CPA2501 software version
Sets the IP address of the instrument
Returns the IP address of the instrument
YES or NO
<sp>(YES or NO)<cr><lf>
<sp>PRI,1<cr><lf>
Locks or unlocks the entire touch screen
Returns Yes or No
Legacy query
<sp>PRI, {sn},1,{mmddyy}<cr><lf> Returns the calibration date of the active transducer
<sp>PRI,1,min,max<cr><lf>
Value in ft/s^2
<sp>+n.nnnnnE+nn<cr><lf> nnn.nnn.nnn.nnn
<sp>nnn.nnn.nnn.nnn<cr><lf>
1 to 4 – see Section 7.8
<sp>X<cr><lf>
Returns range of the active transducer
Sets the local gravity in feet/sec^2
Returns the local gravity in feet/sec^2
Sets the Ethernet network mask
Gets the Ethernet network mask
Sets the output format
Returns the output format – see section 7.8
Returns the maximum pressure since peakreset was sent
Returns the minimum pressure since peakreset was sent
Resets the peak values.
Sets the Ethernet port of the instrument
Returns the Ethernet port of the instrument
Makes the left channel active
Returns the left channel reading
Makes the right channel active
Returns the right channel reading
Makes the right channel active
52 Operating Instructions - CPA2501
Resolution
Resolution?
Rfilter
Rfilter?
Runits
Runits?
Save_cal
Save_linearity
Sbaud
Sbaud?
Sdata
Sdata?
Sensorid?
Span
Air Data Test Indicator
CPA2501
Qc?
RangeMax?
RangeMin?
Rate?
Rdecpt?
Release?
Span?
Sparity
Sparity?
Sstop
Sstop?
<sp>n.nnnnnE+nn<cr><lf>
<sp>n.nnnnnE+nn<cr><lf>
<sp>n.nnnnnE+nn<cr><lf>
<sp>n<cr><lf>
15 char string.
Ex:
Release? Test stand 1
Returns:
<sp>(YES or NO), CCC…
CCC<cr><lf>
<n>
<sp>n<cr><lf>
Returns the right channel reading.
Returns the maximum range of the active transducer in the current units
Returns the minimum range of the active transducer in the current units
Returns the rate reading of the instrument in current units/current time unit
(see: Runits)
Returns the number of rate decimal points (see: Resolution)
This command is used to release control of the instrument in a multiple computer environment.
Yes if release is successful
No if instrument is being controlled with another computer
CCC… = name of controlling computer or AVAILABLE
See: Acquire? and Unlock
Sets the number of significant digits
(see: decpt)
Returns the number of significant digits (see: decpt)
Sets the % of the rate filter
Returns the rate filter
Value in %
<sp>n.nnnnnE+nn<cr>
<lf>
Sec, min, 1 hour, 3 hours
<sp>XXXX<cr><lf>
Sets the rate time unit
Returns the rate time unit
Save calibration values
Save linearity values
9600, 19200, 38400, 57600, 115200 Sets the serial baud rate
<sp>XXXX<cr><lf> Returns the serial baud data
Sets the serial data bits 7 or 8
<sp>n<cr><lf>
<sp>Mensor,SN XXXXXXXX,
VN.NN
desired pressure or ?
<sp>XXXXXXX<cr><lf>
Even, ODD, NONE
<sp>CCCC<cr><lf>
1 or 2
<sp>X<cr><lf>
Returns the serial data bits number
Returns the active transducer’s serial number and firmware version
Sets span on active transducer or for
?, clears previous value, must be >
50% FS and has a 1% limit. CALDIS-
ABLE must be OFF/NO.
Returns span scale factor for active transducer
Sets the serial parity
Returns the serial parity
Sets the serial stop bits
Returns the serial stop bits
Operating Instructions - CPA2501 53
Air Data Test Indicator
CPA2501
Tare
Tare?
Transfer_factory_to_linearity
Units
Units?
ON / OFF
<sp> n.nnnnnE+nn <cr><lf> units code or text in table below
<sp>CCCC<cr><lf>
Unlock
Window
None
Value in current units
Window?
Zero
<sp>n.nnnnnE+nn
<cr><lf> desired pressure or ?
Zero?
<sp>n.nnnnnE+nn
<cr><lf>
Tares the reading to zero
Returns value of Tare
Copy factory linearity coefficients to customer
Sets the instrument engineering units
Returns the instrument units in a text string
Releases Acquire locks (see: Acquire? ) or (see: Release?)
Sets the exponential filter window for the active transducer
Returns the exponential filter window for the active transducer
Sets zero to set pressure or for ?, clears previous value. CALDISABLE must be OFF/NO
Returns zero offset for active transducer
54 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
7.9.1 Units Command Syntax for Measurement Units n Description
5
6
7
8
1
2
3
4 pounds per square inch inches of mercury @ 0°C inches of mercury @ 60°F inches of water @ 4°C inches of water @ 20°C inches of water @ 60°F feet of water @ 4°C feet of water @ 20°C
9 feet of water @ 60°F
10 millitorr
11 inches of sea water @ 0°C
12 feet of sea water @ 0°C
13 atmospheres
14 bars
15 millibars
16 millimeters of water @ 4°C
17 centimeters of water @ 4°C
18 meters of water @ 4°C
19 millimeters of mercury @ 0°C
20 centimeters of mercury @ 0°C
21 torr
22 kilopascals
23 pascals
24 dynes per square centimeter
25 grams per square centimeter
26 kilograms per square centimeter
27 meters of sea water @ 0°C
28 ounce per square inch
29 pounds per square foot
30 tons per square foot
32 micron of mercury @ 0°C
33 tons per square inch
34 hectapascals
36 megapascals
37 millimeters of water @ 20°C
38 centimeters of water @ 20C
39 meters of water @ 20°C
Output Format
PSI
INHG
INHG
INH2O
INH2O
INH2O
FTH2O
FTH2O
MH2O
MMHG
CMHG
TORR
KPA
PA
DY/CM
2
G/CM
2
FTH2O
MTORR
INSW
FTSW
ATM
BAR
MBAR
MMH2O
CMH2O
KG/CM
2
MSW
OSI
PSF
TSF mHG
TSI
HPA
MPA
MMH2O
CMH2O
MH2O
Type
Imperial
Metric
Imperial
Imperial
Imperial
Metric
Metric
Metric
Metric
Imperial
Imperial
Imperial
Imperial
Imperial
Imperial
Imperial
Imperial
Metric
Metric
Metric
Metric
Metric
Metric
Metric
Metric
Metric
Metric
Imperial
Imperial
Imperial
Metric
Imperial
Metric
Metric
Metric
Metric
Metric
Operating Instructions - CPA2501 55
Air Data Test Indicator
CPA2501
7.9.2 CPA2501 Error Codes
Code Serial Poll Byte Description
E00
E05
E07
00h
45h
47h
No errors
Syntax error
Error String Returned
NO ERRORS
Parameter error EGPIB PARAMETER ERROR: String that was sent
EGPIB SYNTAX ERROR: String that was sent
7.9.3 SCPI Commands and Queries
STATus
:OPERation
:CONDition?
Returns an integer value representing instrument status that can be decoded.
Bit 0: Zeroing activ
Bit 1: Control Setpoint has not been reached.
Bit 2: Reserved 0.
Bit 3: Reserved 0.
Bit 5: Measuring. The instrument is actively measuring
MEASure
[:PRESsure][C]?
:TEMPerature[C]?
:RATE[C]?
:BAROmetric?
CALibration
[:PRESsure][C]
:MODE?
:DATE?
:ZERO?
:ZERO:INITiate
SENSe
[:PRESsure][C]
:NAME?
:MODE?
:MODE ABS / GAUGE
:ABS?
:RESolution?
:RANGe
[:UPPer]?
:LOWer?
:UNIT
[:NAME]?
:VALue?
:REFerence
Returns the pressure from Channel [C]
Returns the temperature from Channel [C]
Returns the rate/sec from Channel [C]
Returns the barometric pressure
Returns 1=calibrated or 0=not calibrated
Returns date of cal “MM/DD/YY”
Sets date of cal YYYY,MM,DD
Returns zero offset
Sets the zero offset
Ignored
Returns transducer name string
Returns “ABSOLUTE” or “GAUGE”
Sets pressure type
Returns native transducer type 0=GAUGE 1=ABSOLUTE
Returns resolution (float)
Returns maximum range
Returns minimum range
Returns ASCII units (mixed case)
Returns the units conversion factor
Sets the head pressure height in cm
56 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
:HEIGht?
:MODE?
:MODE OFF | GAS | LIQUID
:MEDium<n>
:MEDium?
:ACTive <C>
ACTive?
SYSTem
:DATE <i,i,i>
:DATE?
:TIME <i,i,i>
:TIME?
:ERRor[:NEXT]?
:KLOCk ON | OFF | 1 | 0
:PRESet
:SAVe
:VERSion?
TEST
:ELECtronic?
UNIT
:[PRESsure] bar | mbar | Pa | psi
:[PRESsure]?
:NAME<n>?
:FACTor <n>?
Returns the head pressure height in cm
Returns “OFF”, “GAS”, or “LIQUID”
Sets the head pressure mode
Sets the medium density
Returns medium
Sets the active channel
Returns the active channel
Not used, kept for backwards compatibility
Not used, does not cause an error, does not return a response
Not used, kept for backwards compatibility
Not used, does not cause an error, does not return a response
Returns error code, description
Sets the keylock state
Load known state values
No function (not needed)
Returns SCPI version 1994.0
Returns “OK”
Sets the pressure units
Returns the pressure units
Returns the units string for units code <n>
Returns the units conversion for units code <n>
:INDEX <n> Sets the index number.
:INDEX?
Returns the index number. index unit
0 bar
1 mbar
2 Pa
3 psi
4 atm
5 kp/cm2
6 lbf/ft2
7 kPa
8 cmH2O(4°C)
9 inH2O(4°C)
10 inH2O(60°F)
11 ftH2O(4°C)
12 µmHg(0°C)
13 mmHg(0°C)
14 cmHg(4°C)
15 inHg(0°C)
16 inHg(60°F)
17 - -
18 user
19 user
20 user
Note:
Except for the engineering units selection, the numeric suffix selects the applicable channel/transducer:
1 = Channel A
2 = Channel B
3 = Channel C
4 = Channel D
5 = baro (if installed)
This numeric suffix always defaults to 1 and is designated by [C] (channel)
Operating Instructions - CPA2501 57
Air Data Test Indicator
CPA2501
7.9.4 SCPI Commands Error Messages and Error Codes
All remote commands sent to the CPA2501 are shown in the Trouble Shooting App, under the “Remote” button. If there is a syntax error, an error message will appear below the errant command. Local errors and remote command errors will appear under the “Error” button. Maximum of 100 errors are stored and can be retrieved.
7.9.5 GPIB Capability Codes
SH1 Full source handshake capability
AH1 Full acceptor handshake capability
T6 Talker with serial poll and unaddress if MLA
L4 Listener with unaddress if MTA
SR1 Full service request capability
L1 Full remote/local capability including LLO
PO No parallel poll capability
DC1 Full device clear capability
DT1 Full device trigger capability
C0 No controller capability
E2 Tri-state outputs
7.9.6 Interface Functions
The CPA2501 responds to the following IEEE.488.2 interface functions:
SRQ Service Request: A service request is asserted whenever an error is encountered. When the bus controller issues a serial poll the error will be cleared. If the host IEEE board includes automatic serial polling capability, turn this feature off in order to view all errors.
LLO Local Lockout: The front panel keyboard of the CPA2501 may be locked by sending LLO or the command KEYLOCK ON.
GET Group Execute Trigger: When this message is received, the CPA2501 will save the current readings until the next time it is addressed as a talker.
GTL Go To Local: A GTL message will cause the CPA2501 to return to local operation and unlock the keyboard.
DCL Device Clear: When this message is received, the CPA2501 will clear all errors and buffers and remain in the Remote mode.
SDC Selected Device Clear: The effect is the same as DCL.
EOI End or Identify: May be used as a command or query terminator in the place of, or concurrent with, a terminating linefeed.
58 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
8 Options
• Barometric Transducer Channel
• Barometric Reference
• External Transducers (CPT6100 and CPT6180)
• Rack Mount Kit
• Fittings
• Remote calibrations sleds (transducers, Barometric reference)
8.1 Barometric Reference
The Barometric Reference Transducer is an absolute pressure sensor used to accurately measure local atmospheric pressure. This sensor is in a different housing compared to the regular transducers. It is removable by taking off the top cover of the chassis.
The CPA2501 uses the barometric pressure, measured by the barometric reference, for pressure mode emulation in the internal and external transducer channels. If a barometric reference is installed the Pressure Mode button in the measure application (main screen) will become active and, when pressed, will toggle between Absolute and Gauge mode (See section 6.4.1 Measure Application).
8.1.1 Gauge Pressure Emulation
When the channel is set to Pressure Mode, within the Measure Application (main screen) an absolute transducer channel will indicate “Absolute” in the mode button (this is the default mode). When this button is pressed the button label will toggle to “Gauge” and have a lighter background color. The lighter background color is an indication that the channel is in emulation mode.
In the gauge emulation mode the atmospheric pressure reading from the barometric reference transducer is subtracted from the absolute pressure reading of the channel to emulate a gauge pressure.
The barometric reference transducer has six significant digits. If a very low pressure gauge transducer is active and is used in absolute emulation, the combined output may appear quite noisy because of the resolution of the barometric reference.
8.1.2 Absolute Pressure Emulation
When the channel is set to Pressure Mode, within the Measure Application (main screen) a gauge transducer channel will indicate “Gauge” in the mode button (this is the default mode). When this button is pressed the button label will toggle to “Absolute” and have a lighter button background color. The lighter background color is an indication that the channel is in emulation mode.
In the absolute emulation mode the atmospheric pressure reading from the barometric reference transducer is added to the gauge pressure reading of the active channel to emulate an absolute pressure.
8.1.3 Emulation Mode Accuracy
The accuracy in emulation mode is the combined accuracy of the transducer and the barometric reference.
8.1.4 Barometric Reference Calibration
The Barometric Reference Transducer can be calibrated in exactly the same manner as the other installed transducers as described in Section 10, Calibration.
Operating Instructions - CPA2501 59
Air Data Test Indicator
CPA2501
8.1.5 Barometric Reference Specifications
Accuracy: 0.01% of reading. Uncertainties include all pressure effects, temperature effects over the calibrated range and calibration stability for 365 days after re-zeroing.
Pressure Range: The standard Barometric Reference Transducer is calibrated from 8 to 17 psia.
Resolution: 6 digits.
8.2 External Transducers (CPT6100 and CPT6180)
The CPT6100 and CPT6180 are stand alone Digital Pressure Transducers that can be purchased separately and connected to the remote transducer port on the back of the CPA2501. The CPT6100 and
CPT6180 have their own data sheets and manuals.
8.2.1 External Pressure Transducer Connection Cable
A shielded ribbon cable is required to connect an external transducer and can be supplied with or without an external Transducer. The part number is: 4060090001.
8.3 Rack Mount Kit
The CPA2501 can be supplied with a single or dual 19” rack mount kit.
Dual Rack Mount Single Rack Mount
8.4 Fittings
A variety of fittings are available at the time of order on transducers with a max range of ≤ 6015 psi (410 bar), or the CPA2501 can be ordered without adaptor fittings. Available fittings are shown in Section 9.2 -
Spare Parts.
8.5 Remote Calibration
A remote calibration sled, power supply, cable and software are available to calibrate the optional barometric reference. A cable / power supply and software are available to remotely calibrate the internal transducers outside of the CPA2501. In both cases a PC with a serial connection is required. Both kits are supplied with an instruction manual.
60 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
8.5.1 Remote Calibration Kit for Internal Transducers.
The cable / power supply used to calibrate the internal transducer package remotely can be ordered as an option (PN 0018990001). Calibration of the internal transducer package can be performed remotely using the cable, a PC, and software provided.
Figure 8.5.1 - Remote Calibration Kit for Internal Transducer Package
Operating Instructions - CPA2501 61
Air Data Test Indicator
CPA2501
8.5.2 Barometric Reference Calibration Sled
A Calibration Sled Kit is available to provide a way to calibrate the barometric reference remotely (PN
0018752001). Calibration of the Barometric Reference can be performed remotely using the Cal sled, a
PC and the software provided.
Figure 8.5.2 - CPA2501 Barometric Reference Cal Sled Kit
62 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
8.5.3 External Calibration Procedures
To calibrate the internal transducers or the barometric reference remotely, use the same setup described in section 10 of this manual. The only difference is that the interface with the transducer is through the software provided and a PC, not directly through the instrument.
8.5.3.1 Transducer Removal
To remove the internal transducer set (Ps/Qc or Ps/Pt), first remove the three slotted screws holding the top panel of the chassis, then remove the top panel. This will reveal the transducer. The transducer can be removed by unplugging the ribbon cables from the transducer, loosening the thumb screw and lifting the transducer out of the chassis.
Thumb
Screw
Figure 8.5.3.1 - Transducer Removal
8.5.3.2 Barometric Reference Removal
To remove the optional Barometric reference, first remove three screws holding the top panel of the chassis, then remove the top panel. This will reveal the barometer, Figure 8.5.3.2. The barometric reference can be removed by removing the attached hose, loosening the thumb screw, and lifting the barometric reference out of the chassis.
CAUTION: ESD protection is required when performing this operation.
!
Operating Instructions - CPA2501
Thumb
Screw
Figure 8.5.3.2 - Internal Barometric Reference
63
Air Data Test Indicator
CPA2501
9 Maintenance
The CPA2501 was designed for maintenance-free operation. User maintenance is not recommended, beyond replacement of parts listed in Table 9.2. If you have questions not covered by this manual, call
1.800.984.4200 (USA only), or 1.512.396.4200 for assistance, or send an e-mail to [email protected].
9.1 Beyond the Warranty
Take advantage of Mensor’s expert product care. Mensor provides complete maintenance and calibration services, available for a nominal fee. Our service staff is knowledgeable in the innermost details of all of our instruments. We maintain units that are in operation in many different industries and in a variety of applications, and by users with a wide range of requirements. Many of these instruments have been in service for over twenty years, and continue to produce excellent results. Returning your instrument to
Mensor for service benefits you in several ways:
• Our extensive knowledge of the instrument assures you that it will receive expert care.
• In many cases we can economically upgrade an older instrument to the latest improvements.
• Servicing our own instruments which are used in “real world” applications keeps us informed as to the most frequent services required. We use this knowledge in our continuing effort to design better and more robust instruments.
9.2 Spare Parts
Table 9.2 lists the spare parts for the CPA2501 that can be ordered from Mensor.
Table 9.2 - Spare Parts List
Part Description
Adaptor Fittings
6mm tube fittings (brass)
1/4” tube fittings (brass)
1/4” NPT female pipe thread (brass)
1/8” NPT female pipe thread (brass)
1/8 FBSPG female pipe thread (brass)
6mm tube fittings (Stainless)
1/4” tube fittings (Stainless)
1/4” NPT female pipe thread (Stainless)
1/8” NPT female pipe thread (Stainless)
1/8 FBSPG female pipe thread (Stainless)
Kits/Manual
Kit - Rack Mount adapter, single unit
Kit - Rack Mount adapter, dual unit
Manual
Pressure ≤ 3000 psi 3000 psi ≤ pressure ≤ 6015 psi
0018203043
0018203045
0018203005
0018203001
0018203018
Part Number
0019261001
0019261002
0018909001
Part Number
0018203039
0018203027
0018203031
0018203035
0018203046
64 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
10 Calibration
The CPA2501 automatically adjusts the pressure reading for the effects of temperature and non-linearity within the calibrated temperature range of 15-45°C. The process is referred to as dynamic compensation because each reading is so adjusted before it is output to the display or to a communication bus. Thus, a calibrated CPA2501 operated within its temperature band, and with proper zero and span adjustments, will provide accurate pressure measurements.
The CPA2501 should have the calibration verified periodically to insure stability. The recommended calibration cycle is one year or six months depending on the transducer range.
10.1 Calibration Services by Mensor or WIKA worldwide
Mensor and WIKA worldwide have extensive experience and knowledge of Mensor products. Calibration of the transducers in these products can be performed at the addresses below or by competent internal or external labs using the procedures in this section.
Service Center USA
Mensor website: www.mensor.com tel: 1-512-396-4200
1-800-984-4200 fax: 1-512-396-1820 email: [email protected]
Service Center China
WIKA China website: www.wika.cn contact: Baggio Li tel: (+86) 512 6878 8000 fax: (+86) 512 6809 2321 email: [email protected]
Service Center Europe
WIKA Alexander Wiegand SE & Co. KG website: www.wika.de / www.wika.com tel: (+49) 9372 132-0 fax: (+49) 9372 132-406 email: [email protected]
10.2 Environment
For maximum accuracy, allow the CPA2501 to warm up a minimum of 15 minutes in ambient temperature within the compensated range prior to a calibration. In addition, the instrument should be at rest on a stable platform that is free of excessive vibration and shock.
10.3 Pressure Standards
Mensor recommends the use of appropriately accurate primary pressure standards when calibrating this instrument. Such standards should be sufficient so that when the techniques of the ISO Guide to the Expression of Uncertainty in Measurement (GUM) are applied, the instrument meets its accuracy statements as required by ISO/IEC 17025:2005, or other applicable standards.
10.4 Media
The recommended calibration medium is dry nitrogen or clean dry instrument air. A height variation between the standard and the CPA2501 can cause significant errors. A calculation should be made to compensate for this difference.
Operating Instructions - CPA2501 65
Air Data Test Indicator
CPA2501
10.5 Setup
The following illustration for calibration setup shows a typical setup for either local or remote calibration.
Connect to the corresponding port when calibrating Ps, Pt (absolute transducers) and Qc (gauge transducer).The equipment shown in the rectangle is only necessary for (Ps or Pt) absolute calibration. The
PC is required only for performing a remote calibration.
The “Pressure Standard” is normally a deadweight test instrument, and the “Volume Controller” refers to a hand operated variable-volume pressure vernier device. A diaphragm type vacuum gauge is recommended over the gauge tube type of vacuum transducer for calibrating sub-atmospheric pressures. A vacuum pump with the capacity to generate 600 mTorr absolute is recommended.
66
Figure 10.5 - Calibration Setup
Ps must see the same pressure as Qc reference for the common mode to work correctly. When performing a dual deadweight calibration, the reference pressure cannot exceed the range of Ps. During the calibration of the Qc transducer, the Ps channel should be connected to the Qc reference.
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
10.6 Calibration Data
The Calibration Data Application is where the calibration data for each transducer is stored and amended. The Serial number (S/N), Zero offset (Zero) and Span offset (Span) can be seen in this screen.
The date of calibration, the calibration interval and the certificate number can be entered by pressing the corresponding button, then saved by pressing the Check [ ] button. To revert back to the factory calibration, press the “Restore Factory Cal” button. To view the calibration data for each transducer press the “Channel” button at the top and choose a transducer from the resulting channel selection menu.
Figure 10.6 - Calibration Data
10.7 One Point Cal Application
A single point calibration (usually a zero point calibration) of each transducer installed can be accomplished in “One Point Cal” Application. The transducer channel is chosen by pressing the
“Channel” button at the top of this screen, and then selecting from the list of installed transducer channels. For gauge pressure simply expose the reference and the pressure port of the transducer to atmospheric pressure and then press the “New Value” button and enter zero (0) using the keypad. For an absolute transducer apply a known reference pressure to the pressure port of the transducer above
600 mTorr and below 20% of the transducer’s range. Press the “New Value” button and then enter the reference pressure (known true pressure) using the keypad. If you want to save the value in the transducer, press Save.
Notice the reference symbol [ ], this is a reference indication giving a constant reference point for the level of the internal transducer.
Figure 10.7 - One Point Cal Application
Operating Instructions - CPA2501 67
Air Data Test Indicator
CPA2501
10.8 Two Point Cal Application
The Two Point Cal Application provides a place to adjust the Transducer Zero and Span (sometimes referred to as the offset and slope).
Figure 10.8 - Two Point Cal Application
Follow the steps below for a complete 2 Point Calibration:
Select a Transducer to calibrate by pressing the Channel button at the top of the screen.
To calibrate the “low Point”:
1. The pressure port of the transducer being calibrated should be supplied with a suitable, “low point” pressure (see section 5.4 Rear Panel for the port location).
2. For a gauge transducer, this low point pressure can be achieved by opening the pressure and reference ports to atmospheric pressure.
3. For an absolute transducer a suitable source of vacuum should be applied to the Pressure port along with a high accuracy vacuum standard or a pressure calibration standard can be connected to the
Pressure port that can generate and measure a pressure value. In either case the pressure should be measured at a stable value that is between 600 mTorr absolute and 20% of the range of the selected internal transducer.
4. When the pressure is stable, record the live reading shown on the Two Point Cal screen and enter this value as the “Low Reading” by pressing the Low Reading button and entering the number followed by the check mark [ ]. Record the “true pressure” obtained from the reference standard and enter it as the “Low Reference” value in the same manner.
To calibrate the”High Point”:
5. The “High Point” Calibration is done in a similar way as the “Low Point”.
6. Supply a pressure to the Pressure Port of the Transducer being calibrated, using a pressure standard.
This pressure should be as close as possible to the full scale value of the selected transducer or at least within 20% of that value.
7. After the pressure stabilizes, record live reading shown on the Two Point Cal screen and enter this value as the “High Reading” by pressing the High Reading button and entering the number followed by the check mark [ ]. Record the “true pressure” obtained from the reference standard and enter it
68 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
as the “High Reference” value in the same manner.
After all four values (High Reference, High Reading, Low reference, & Low reading) have been entered, the Adjust button will become active. Press the Adjust button to check and accept the calibration data then press the Save button. The instrument will then prompt with the question “Save Cal Data?”. Pressing the check mark [ ] in this screen will save the calibration to the memory of the transducer.
10.9 Linearization
The Linearize Application provides a place to record upscale and downscale calibration data and to linearize each transducer using that data. An “as found calibration” can be performed by connecting a suitable pressure standard to the Pressure port of the transducer being calibrated, and supplying all 11 pressure points across the complete range. The record of the pressures from the pressure standard and the corresponding reading from the instrument’s transducer can be recorded and transcribed into the Linearization Matrix shown in Figure 10.9-A. Linearization of each transducer can be performed from this screen by selecting each transducer channel using the channel button in the top left hand corner.
Figure 10.9-A - Linearization Application Data Matrix
The Linearization Application automatically populates the screen with 10% increments from the low to high pressure corresponding to the range of the transducer selected. These values can be changed to reflect the values generated by the standard and the corresponding readings taken from the CPA2501.
Each value from the standard can be entered under the reference column, corresponding Upscale and
Downscale readings from the instrument can be entered in the “Upscale” and “Downscale” columns. To enter a value simply press the number and a key pad will appear (see Figure 10.9-B) where the number can be entered. Press the check mark [ averages the upscale and downscale values.
] to accept each value. The “Average” column automatically
Operating Instructions - CPA2501 69
Air Data Test Indicator
CPA2501
Figure 10.9-B - Linearization Values
Figure 10.9-B shows some typical values that might be seen in a linearization calibration. In the bottom right hand corner of this screen is the Graph Icon [ entered in the Linearization screen.
] that, when pressed, reveals a Linearization
Error Graph (figure 10.9-C) that gives a visual representation of the errors associated with the values
This Linearization error graph shows a scaling that corresponds to the maximum error calculated from the data entered in the Linearization Matrix. It is a good indication of the overall error of the transducer, and will quickly reveal any gross data entry errors that have been made. To revert back to the Linearization Matrix press the Matrix Icon [ ].
Relative
Scale
70
Figure 10.9-C - Linearization Error Graph
When satisfied that all values have been entered correctly, press the adjust button and then the save button to save the new calibration data in the transducer memory.
i
Note: After calibration is complete, return to the Calibration Data Application (Section 10.6) to record the certificate number, calibration interval and the date of calibration. Restoration to factory calibration can also be completed in this application.
Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
10.10 Head Pressure
The Head Pressure Application provides an automated way to calculate the head pressure offset between a device being tested and the CPA2501 transducer, based on:
• The difference in height between the device under test and the sensing element in the transducers
(internal and external) in the CPA2501
• The gas density of the pressure media
• The gas temperature
• The local gravity
The Head Pressure application is placed under the password protected area of the operator interface to safeguard against inadvertent activation. It is intended to be used to accurately measure the pressure at an external source that is at a different elevation from the CPA2501 transducer sensing that pressure. The four parameters are used to calculate the pressure that is a result of the different elevations. It should not be used when calibrating CPA2501 transducers. The Head height should be set at zero before calibrating the transducers of the CPA2501. i
Notice
The Head Pressure should not be active when calibrating CPA2501 transducers.
The Head height should be set at zero before calibrating the transducers of the
CPA2501. Difference in height between the laboratory standard and the CPA2501 during calibration should be factored into the uncertainty analysis.
Figure 10.10 shows the Head Pressure screen. The height, gas density, gas temperature and local gravity can be entered here based on the specific setup of the system.
Operating Instructions - CPA2501
Figure 10.10 - Head Pressure
71
Air Data Test Indicator
CPA2501
Code
30
31
32
27
28
29
33
34
35
36
24
25
26
21
22
23
37
38
39 n/a n/a
17
18
19
20
14
15
16
6
7
4
5
1
2
3
11
12
13
8
9
10
11 Appendix
11.1 Measurement Units
Table 11.1 - Measurement Units (unitno)
Description
pounds per square inch inches of mercury @ 0°C inches of mercury @ 60°F inches of water @ 4°C inches of water @ 20°C inches of water @ 60°F feet of water @ 4°C feet of water @ 20°C feet of water @ 60°F millitorr inches of seawater @ 0°C 3.5% salinity feet of seawater @ 0°C 3.5% salinity atmospheres bars millibars millimeters of water @ 4°C centimeters of water @ 4°C meters of water @ 4°C millimeters of mercury @ 0°C centimeters of mercury @ 0°C torr kilopascals pascals dyne per square centimeter grams per square centimeter kilograms per square centimeter meters of seawater @ 0°C 3.5% salinity ounce per square inch pounds per square foot tons per square foot percent of full scale micron HG @ 0°C ton per square inch n/a hectopascals megapascals millimeters of water @ 20°C centimeter of water @ 20°C meters of water @ 20°C
User Units 1
User Units 2
Output Format
Bar mBar mmH2O 4°C cmH2O 4°C
MH2O 4°C mmHg 0°C cmHg 0°C
Torr kPa
PA
Dy/cm2 gm/cm2 kg/cm2
MSW
OSI
PSF
TSF
%FS
µHg 0°C
TSI n/a hPa
MPa mmH2O 20°C cmH2O 20°C
MH2O 20°C
User defined
User defined
PSI inHg 0°C inHg 60°F inH2O 4°C inH2O 20°C inH2O 60°F ftH2O 4°C ftH2O 20°C ftH2O 60°F mTorr inSW ftSW
ATM
72 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
11.2 Conversion Factors, PSI
The values listed in the column “To convert from psi” are the values imbedded in the instrument program.
The values listed under “To convert to psi” are internally calculated approximations based on the imbedded values.
Table 11.2 - Conversion Factors, psi
17
18
19
20
21
13
14
15
16
26
27
28
29
22
23
24
25
30
31
32
33
35
36
37
38
39
9
10
11
12
5
6
7
8
2
3
4
Code
1
Pressure Unit
psi inHg 0°C inHg 60°F inH2O 4°C inH2O 20°C inH2O 60°F ftH2O 4°C ftH2O 20°C ftH2O 60°F mTorr inSW 0°C 3.5% salinity ftSW 0°C 3.5% salinity
ATM bar mbar mmH2O 4°C cmH2O 4°C mH2O 4°C mmHg 0°C cmHg 0°C
Torr kPa
Pa dy/cm2 gm/cm2 kg/cm2 msw 0°C 3.5% salinity osi psf tsf
%FS
µHg 0°C tsi hPa
MPa mmH2O 20°C cmH2O 20°C
MH2O 20°C
0.06804596
0.06894757
68.94757
703.0890
70.30890
0.7030890
51.71508
5.171508
51.71508
6.894757
6894.757
68947.57
70.30697
0.07030697
0.6838528
16
144
To convert from psi
1
2.036020
2.041772
27.68067
27.72977
27.70759
2.306726
2.310814
2.308966
51715.08
26.92334
2.243611
0.072
(PSI / RANGE) x 100
51715.08
0.0005
68.94757
0.006894757
704.336
70.4336
0.704336
To convert to psi
1
0.4911544
0.4897707
0.03612629
0.03606233
0.03609119
0.4335149
0.4327480
0.4330943
0.00001933672
0.03714250
0.445710
14.69595
14.50377
0.01450377
0.001422295
0.01422295
1.422295
0.01933672
0.1933672
0.01933672
0.1450377
0.0001450377
0.00001450377
0.01422334
14.22334
1.462303
0.0625
0.006944444
13.88889
(% FS x RANGE) / 100
0.00001933672
2000
0.01450377
145.0377
0.001419777
0.01419777
1.419777
Operating Instructions - CPA2501 73
Air Data Test Indicator
CPA2501
11.3 Conversion Factors, Millitorr
The following table lists factors which should be used as multipliers when converting other pressure units to or from millitorr.
Table 11.3 - Conversion Factors, millitorr
14
15
16
17
18
10
11
12
13
6
7
8
9
2
3
4
5
Code
1
23
24
25
26
19
20
21
22
32
33
35
36
37
38
39
27
28
29
30
Pressure Unit
psi inHg 0°C inHg 60°F inH2O 4°C inH2O 20°C inH2O 60°F ftH2O 4°C ftH2O 20°C ftH2O 60°F mTorr insw 0°C 3.5% salinity ftsw 0°C 3.5% salinity atm bar mbar mmH2O 4°C cmH2O 4°C mH2O 4°C mmHg 0°C cmHg 0°C
Torr kPa
Pa dy/cm2 gm/cm2 kg/cm2 msw 0°C 3.5% salinity osi psf tsf
µHg 0°C tsi hPa
MPa mmH2O 20°C cmH2O 20°C mH2O 20°C
To convert from millitorr
0.00001933672
0.00003936995
0.00003948117
0.0005352534
0.0005362028
0.0005357739
0.00004460451
0.00004468356
0.00004464783
1.0
0.0005206091
0.00004338408
0.000001315786
0.000001333220
0.001333220
0.0135954
0.001359544
0.00001359544
0.001
0.0001
0.001
0.0001333220
0.1333220
1.333220
0.001359506
0.000001359506
0.00001322347
0.0003093875
0.002784488
0.000001392244
1.0
0.00000000966836
0.001333220
0.0000001333220
0.01361955
0.001361955
0.00001361955
To convert to millitorr
51715.08
25400.08909
25328.53093
1868.273977
1864.966281
1866.458778
22419.25773
22379.59744
22397.50637
1.000000000
1920.827359
23049.92831
760002.2299
750063.6259
750.0636259
73.5540997
735.5409971
73554.09971
1000.000000
10000.00000
1000.000000
7500.636259
7.500636259
0.750063626
735.561166
735561.166
75623.11663
3232.1992
359.132477
718265.0575
1.000000000
103430160.00
750.0636259
7500636.259
73.42388114
734.2388114
73423.88114
74 Operating Instructions - CPA2501
Air Data Test Indicator
CPA2501
11.4 Conversion Factors, Pascal
The following table lists factors which should be used as multipliers when converting other pressure units to or from Pascal.
11.4 - Conversion Factors, Pascal
33
35
36
37
38
39
28
29
30
32
24
25
26
27
20
21
22
23
11
12
13
14
7
8
9
10
15
16
17
18
19
4
5
6
2
3
Unit No.
1 cmHg 0°C
Torr kPa
Pa dy/cm2 gm/cm2 kg/cm2 msw 0°C 3.5% sal osi psf tsf
µHg 0°C tsi hPa
MPa mmH2O 20°C cmH2O 20°C mH2O 20°C
Pressure Unit
psi inHg 0°C inHg 60°F inH2O 4°C inH2O 20°C inH2O 60°F ftH2O 4°C ftH2O 20°C ftH2O 60°F mTorr inSW 0°C 3.5% sal ftSW 0°C 3.5% sal atm bar mbar mmH2O 4°C cmH2O 4°C mH2O 4°C mmHg 0°C
7.500636E-04
7.500636E-03
1.00000E-03
1.00000E+00
1.00000E+01
1.019716E-02
1.019716E-05
9.918444E-05
2.320603E-03
2.088543E-02
1.044271E-05
7.500636E+00
7.251885E-08
1.00000E-02
1.00000E-06
1.021553E-01
1.021553E-02
1.021553E-04
To convert from Pascal
1.450377E-04
2.952997E-04
2.961339E-04
4.014741E-03
4.021862E-03
4.018645E-03
3.345622E-04
3.351551E-04
3.348871E-04
7.500636E+00
3.904899E-03
3.254082E-04
9.869230E-06
1.00000E-05
1.00000E-02
1.019744E-01
1.019744E-02
1.019744E-04
7.500636E-03
1.333220E+03
1.333220E+02
1.00000E+03
1.00000E+00
1.00000E-01
9.806647E+01
9.806647E+04
1.008222E+04
4.309223E+02
4.788025E+01
9.576052E+04
1.333220E-01
1.378951E+07
1.00000E+02
1.00000E+06
9.789017E+00
9.789017E+01
9.789017E+03
To convert to Pascal
6.894757E+03
3.386390E+03
3.376850E+03
2.490820E+02
2.486410E+02
2.488400E+02
2.988980E+03
2.983692E+03
2.986080E+03
1.333220E-01
2.560885E+02
3.073062E+03
1.013250E+05
1.00000E+05
1.00000E+02
9.806378E+00
9.806378E+01
9.806378E+03
1.333220E+02
Operating Instructions - CPA2501 75
Mensor
201 Barnes Drive
San Marcos, Texas 78666
Tel. 512-396-4200
Fax 512-396-1820 [email protected] www.mensor.com
Air Data Test Indicator CPA2501 PN 0018909001E • 07/2017
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg / Germany
Tel. +49 9372/132-5015
Fax +49 9372/132-8767
www.wika.de
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Key features
- Removable, highly stable, temperature compensated air data transducer package with Ps/Qc or Ps/Pt configuration.
- 7" Color LCD with touch screen
- Emulation of Pt or Qc from native internal transducer package.
- Multiple languages.
- Desk top or rack mount
- Local Operation, or command and read remotely.
- Optional removable internal high accuracy barometric reference transducer.
