WIKA mensor 9476 User manual

Operating instructions
Pressure verification system
Model 9476 EN
Pressure verification system Model 9476

2Mensor operating instructions Pressure verification system, Model 9476
0020507001A 09/2018 EN
EN Operating instructions model 9476
© 05/2019, Mensor, LP. All rights reserved.
Mensor is a registered trademark of Mensor, LP.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Prior to starting any work, read the operating instructions!
Keep for later use!

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Mensor operating instructions Pressure verification system, Model 9476
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Contents
1. General Information 5
1.1 Further information: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.1 FCC Emission Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.2 CE Emission Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Software License Agreement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Mensor Service Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.1 After the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.2 Calibration Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.3 Certifications and Accreditations . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Safety 7
2.1 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Responsibility of the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Personnel Qualification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Personal Protective Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4.1 Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Initial setup 11
3.1 Unpacking and initial setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Pressure connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Electrical power connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Electrical communication connections . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4. Panel operation 13
4.1 Panel overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.1 Front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.2 Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Front Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 System Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4.1 Sensor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4.2 Regulator Configuration and Control . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.3 Remote Configuration and Control . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.4 System Info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5 Typical Operating Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5.1 Pressure Measuring and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5.2 Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5.3 Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5.4 Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Serial Communication Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7 Ethernet Communication Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8 Remote Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.9 System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.9.1 Stored Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.9.2 Memory Card Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5. Calibration and Maintenance 28
5.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4Mensor operating instructions Pressure verification system, Model 9476
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5.2 Storage and Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3.1 Beyond the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4 Calibration Services by Mensor or WIKA worldwide . . . . . . . . . . . . . . . . . . . . . 29
6. Specifications 30
6.1 Measurement Specifications -Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.2 Measurement Specifications - Temperature . . . . . . . . . . . . . . . . . . . . . . . . 30
6.3 Control Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.4 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7. Appendix 32
7.1 Pneumatic schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Contents

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Mensor operating instructions Pressure verification system, Model 9476
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1. General Information
The Mensor Model 9476 Pressure Verification System is a multi-channel pneumatic measuring and controlling instrument for wind
tunnel pressure verification. It contains 5 measurement transducers arranged with a high precision barometric transducer, a single
pressure control channel, and 3 dual transducer high line pressure differential transducers.The barometric transducer can be
monitored independently and used as a precision reference to automatically null the readings of the four absolute transducers.The
instrument can be operated from the front panel, over a RS-232 serial port or a 10/100/1000 Mbps Ethernet port.The barometric
transducer has a range of 8 to 17 psiA with an accuracy of 0.008% of reading.The pressure control transducer has a range of 0
to 33 psiA with an accuracy of 0.010% of full scale.The 3 dual transducers are +/-15 psiD with up to 33 psi line pressure and +/-5
psiD with up to 33 psi line pressure. The dual transducers have accuracies of 0.009% IS-50 on the absolute side and 0.010% of full
scale on the differential side. All transducers have a recommended calibration interval of 1 year. All transducers are protected with
overpressure relief valves set to approximately 110% of range. Each transducer is removable from the front panel of the instrument.
The instrument software provides multi-speed reading rates and optional reading synchronization for the 3 dual transducers.The
system also includes a temperature probe secured near the transducers to allow the transducer temperature to be monitored.
The 9476 is housed in an aluminum chassis having dimensions of 17.75” (45.085 cm) wide, 7” (17.78 cm) high and 17.5” (44.45
cm) deep. Standard rack ears add 1.25 (3.175 cm) to the width and 1.75” (4.445 cm) to the depth. All porting extends from the
rear of the chassis and adds additional depth depending on fittings and connections to the unit.The unit is configured for desktop
or rack mounting in a standard 19” instrumentation rack and has a 4U height when the chassis feet are removed.The unit operates
from universal power (100 to 240 volt 50/60 Hz) at 2 amps maximum. Two thumb screws on the front panel allow access to the
removable transducers and the system memory card.The overall system can include as options, a calibration sled for external
calibration of the measurement transducers and a transit case for secure shipping.
The major design goal was to provide synchronized and high speed transducer pressure readings while in the measurement
or monitoring mode of operation.This was achieved with customized serial communication between the dual transducers and
instrument firmware. These modifications allow one of four reading rates (nominally 14, 17, 20 or 29 readings per second with
synchronization, 51, 64, 133 or 156 readings per second without synchronization).
1.1 Further information:
Mensor Corporation
- Address 201 Barnes Dr., San Marcos, TX 68666
- Internet address: www.mensor.com
- Relevant data sheet: CT 25.12
- Application consultant: Tel.: [phone]
([phone] (USA only)
Fax: [phone]
E-Mail: [e-mail]
[email protected]
Importer for Europe
WIKA Alexander Wiengand SE & Co. KG
-Address Alexander Wiegand-Straße
63911 Klingenberg, Germany
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: CT 25.12
- Application consultant: Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
1.2 Warranty
All products manufactured by Mensor are warranted to be free of defects in workmanship and materials for a period of two year
General information

6Mensor operating instructions Pressure verification system, Model 9476
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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.
1.2.1 FCC Emission Notice
This equipment has been tested and found to comply with the limits for a Class B 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 residential 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.
1.2.2 CE Emission Notice
This equipment is of the emission class B, intended for operation in industrial, residential or commercial environments.
1.3 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.
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.
1.4 Mensor Service Plus
1.4.1 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.
1.4.2 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.
1.4.3 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.
General Information

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Mensor operating instructions Pressure verification system, Model 9476
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Safety
2. Safety
2.1 Explanation of Symbols
DANGER!
... indicates a directly dangerous situation resulting in serious injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or damage to property or the environment,
if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety instructions not be observed, there is a risk of
serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient and trouble-free operation.
2.2 Responsibility of the Operator
The instrument is used in the industrial sector.The operator is therefore responsible for legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the safety, accident prevention and environmental protection
regulations for the application area must be maintained.
The operator is obliged to maintain the product label in a legible condition.
The operator must ensure that:
■Mechanical vibration, mechanical shock are minimized
■The instrument is installed in areas without soot, vapor, dust and corrosive gases
■The instrument is not used in hazardous environments, flammable atmospheres
■The operating personnel are regularly instructed in all topics regarding work safety, first aid and environmental protection and
know the operating instructions and in particular, the safety instructions contained therein
■The instrument is suitable for the particular application in accordance with its intended use
■Personal protective equipment is available
2.3 Personnel Qualification
WARNING!
Risk of injury should qualification be insufficient
Improper handling can result in considerable injury and damage to equipment.
▶The activities described in these operating instructions may only be carried out by skilled personnel who have the
qualifications described below.

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Skilled personnel
Skilled personnel, authorized by the operator, are understood to be personnel who, based on their technical training, knowledge
of measurement and control technology and on their experience and knowledge of country-specific regulations, current standards
and directives, are capable of carrying out the work described and independently recognizing potential hazards.
Operating personnel
The personnel trained by the operator are understood to be personnel who, based on their education, knowledge and experience,
are capable of carrying out the work described and independently recognizing potential hazards.
Special knowledge for working with instruments for hazardous areas:
The skilled (electrical) personnel must have knowledge of ignition protection types, regulations and provisions for equipment in
hazardous areas.
Special operating conditions require further appropriate knowledge, e.g. of aggressive media.
Safety

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Mensor operating instructions Pressure verification system, Model 9476
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2.4 Personal Protective Equipment
The personal protective equipment is designed to protect the skilled personnel from hazards that could impair their safety or health
during work.When carrying out the various tasks on and with the instrument, the skilled personnel must wear personal protective
equipment.
Follow the instructions displayed in the work area regarding personal protective equipment!
The requisite personal protective equipment must be provided by the operating company.
Wear safety goggles!
Protect eyes from flying particles and liquid splashes.
Wear a protective helmet!
Protects the head from falling objects.
Wear safety shoes!
Protect feet from falling objects or objects lying around, as well as against toxic or hazardous liquids and aggressive
media.
2.4.1 Symbols
Before mounting and commissioning the instrument, ensure you read the operating instructions!
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European directives.
This marking on the instruments indicates that they must not be disposed of in domestic waste.The disposal is
carried out by return to the manufacturer or by the corresponding municipal authorities (see EU directive 2012/19/
EU).
2.5 Warnings and Cautions
The Model 9476 has a maximum supply pressure rating of 30 psig (45 psia).The internal transducers have a burst rating of
approxmiately 1.5x the full scale of pressure. Each transducer range in the unit is equipped with relief valves to protect from
overpressure.
WARNING!
The 9476 has a maximum supply pressure rating of 30 psi gauge (45 psi absolute).The internal transducers have
a burst rating of approximately 1.5x the full scale pressure. Each transducer range in the unit is equipped with relief
valves to protect from overpressure.
HIGH PRESSURE!
The 9476 can operate in system configurations containing large pressure storage tanks. Large vessels even at fairly
low pressures can hold large amounts of kinetic energy. User should safely bleed all pressure stored in external
volumes before servicing, removing pressure hoses, or removing transducers. Powering down the instrument isolates
the instrument from external pressures, but does not vent or relieve pressure from internal or external vessels.
SHOCK!
The system uses normal power line AC voltages. User should remove the AC power cord from mains when servicing
Safety

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inside the 9476 chassis.
WARNING!
Any maintenance or troubleshooting should be performed by technicians knowledgeable in pneumatic pressure
instrumentation and AC powered electronic equipment.
WARNING!
The unit weighs approximately 40 lbs. and is intended as a ‘two person lift.’
HOT!
Some moving mechanical devices contained within the chassis (specifically solenoid valves) can build up excessive
heat during continuous operation. Care should be taken when servicing inside the instrument.
Additional Warning and Caution notices are found throughout this manual.
Safety

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Mensor operating instructions Pressure verification system, Model 9476
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Initial setup
3. Initial setup
3.1 Unpacking and initial setup
The initial installation should include removing any packing material used in shipment and inspect that fittings and screws are
snug, and that hoses and electrical cords are not chaffed or cut.The Model 9476 should be installed on a level surface (bench top
or rack) with adequate airflow to keep the system within its 15 to 45 C optimum operating temperature range. The unit operates on
line voltages between 100 and 240 VAC at 50 or 60 Hz.
A source of dry inert gas media is required for pressure control operations. Supply pressure is not required if only pressure
monitoring operations are needed.The supply pressure for full range operation should be instrument quality at approximately 30
psi gauge (45 psi absolute). If compressed air is used it should be a quality class of 1.2.1 or better as defined by ISO Standard
8573.1. This limits dirt particles to less than 0.1 microns, a water pressure dew point of -40 C or lower at 100 psig, and oil vapor of
less than 0.008 ppm. A vacuum pump or vacuum source is required if sub-atmospheric pressure control is required.
3.2 Pressure connections
■The supply pressure should be connected to the rear panel port labeled as “SUPPLY.” The pressure should be approximately 30
psi gauge as described in “Unpacking and Initial Setup.”
■For sub-atmospheric pressure control, a vacuum source is required and should be connected to the port labeled “EXHAUST.” If
only control pressures above barometric pressure are required or only measuring is required, no vacuum source is needed and
the exhaust port should be left open.
■If a pump is not used and exhaust noise is excessive, a pressure muffler can be installed on the exhaust port. Mensor can
provide recommendations or a suitable muffler.
■Porting on the rear of the unit includes female 7/16-20 SAE straight thread manifold ports for all ports.
■Adapters are provided to convert to 1/4” tube fittings.
3.3 Electrical power connections
■Electrical AC power is connected to the IEC320 power entry module in the rear of the instrument using the power cord supplied.
The entry module provides the main power switch, a power line filter, and fusing for the unit.
3.4 Electrical communication connections
■The communication ports on the rear of the instrument are provided for connections to a user’s computer or network. A DB9 M/F
cable is provided to connect to a PC serial port.The length of this cable can be extended if desired by the user.
■Mensor recommends that a shielded cable be used and conform to local EMI standards.
■The Ethernet port utilizes a standard RJ45 cable. A straight cable should be used if connected through a hub or switch and a
cross cable should be used if connected directly to a PC.
■A simple cross-over cable is provided for initial testing.This cable does not replace heavy duty certified Cat 5 or Cat 6 cable, but
does provide something to get the unit up and running not knowing the actual required cable length for the final application.

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Front panel operation
3.5 Operation
Generally, once configured, the system requires power, clean dry pressure media, and possibly a vacuum source for
sub-atmospheric control and near-atmospheric control.
■Start up operation commences when power is applied using the rear panel power switch.
■If the front LED does not illuminate, verify power is applied to the rear panel and the fuses are operational.The unit may take
about a minute to boot up.
■The unit powers up into measure mode of operation with all internal solenoid valves closed, and transducer null offsets turned
off.
■All other start-up settings are dependent on the saved system configuration including pressure units, transducer synchronization
and communication rate, head pressure correction, and remote communication settings.
■When the unit is powered down by turning off the unit with the rear port switch, the system will cease pressure operations and
seal the system ports trapping incoming and outgoing pressures.
■On application of power, the processor and display should go through internal self tests and display the operating screen in
approximately 1 minute. During this time the internal operating system will initialize, transducers will be identified and read, and
serial and Ethernet connections will be verified using saved settings.
■The AUX transducer is treated as optional in the system, but boot times may be extended when it’s not installed as the self-tests
attempt to find it.
■When complete, the instrument will display a home screen similar to that shown here.
Figure 3.5 Initial Display

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Mensor operating instructions Pressure verification system, Model 9476
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4. Panel operation
4.1 Panel overview
4.1.1 Front panel
The front panel contains a color LCD monitor with touch screen along with a blue power LED indicator. Manual operation of the
9476 is through the front panel using the touch screen interface.The features provided on the touch screen are listed in the general
operations section.Touch panel operation can be disabled using remote commands. Monitoring of operations, readings and
pressure set point changes are still possible when the panel is locked. Disengaging the two thumb screws allows the front panel
doors to open for access to the transducers and system memory card.
Figure 4.1.1 Front Panel
4.1.2 Rear panel
External pressure porting and communication connections are provided on the rear of the unit along with the main power entry
module (switch, fuse & filter). Pressure ports include the supply port, exhaust port, vent port, barometric reference port, control
reference port, and transducer channel measure ports.The supply port assumes the use of clean dry inert media (air or nitrogen
preferred).The exhaust or vacuum port is provided if sub-atmospheric control is required. If not required, the exhaust port should
be left unconnected.The test device should be connected to the measure ports. If external venting of the pressure is preferred or
required for safety, the vent port will accept a 7/16-20 SAE fitting.The vent port includes a pre-installed muffler fitting that will need
to be removed if external venting is used.
The instrument accepts universal AC power (100 to 240 volts AC, 50 or 60 Hz, 2 amps max). Power is brought into the unit on a
standard IEC 320 power entry module (C13/C14) on the rear panel. A power switch is contained on the module along with fuses
and a line filter. Power is fused on both the hot and neutral AC lines entering the unit. No switching or adjustments are required to
go from 100 volt operation to 230 volt operation or back. Internally all components are powered by a 12 volt DC power supply.
Electrical signal connections consist of an RS-232 serial port and a 10/100/1000 Mbps TCP/IP (Ethernet) port for connection to
a user computer.The RS-232 port supports a variety of settings. The TCP/IP connection support both IPv4 and IPv6 protocols.
Settings for the serial and Ethernet ports can be configured using the front panel touch interface or through remote commands.
Figure 4.1.2 Back Panel
Installation

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4.2 Front Panel Operation
The unit powers up into the default operating screen in the default mode of measure and with the control set point equal to the first
barometric reading measured. The screen is divided into 2 primary sections, each with various sub-sections and a fixed model
header across the top of the screen.The left half of the screen is the complete set of measurement and control values throughout
the system, including the DPCAL transducer, DPMON transducer, AUX transducer, PREF transducer, barometric transducer,
and internal temperature probe.The right half of the screen is for system configuration further divided into selectable categories:
Sensors, Regulator, Remote, and Info.
Many settings are configured using simple, single tap push-buttons, often in mutually exclusive sets of values. An active setting
button will be highlighted in blue with white text, inactive settings will be gray with black text.
Some settings require numeric input.To modify numeric values, tap the existing displayed value. A numeric input window will
pop up aligned to the selected setting. The input pop up will typically have a header panel that may include some combination
of minimum, maximum, default, and current values associated with the activated setting.This pop up window can be closed
(canceled) by clicking the red “X” button on right right side. As numeric values are entered, the associated setting display field will
highlight in red for invalid values and green for acceptable values.The value is submitted by tapping the green enter button on the
bottom right.There is also a yellow clear (CLR) button to erase all current input and a yellow backspace button to clear a single
character. Depending on the activated setting there may also be a +/- button to toggle negative and positive values, and decimal
point button.The IPv6 address input pop up window has additional hex value digits and a colon separator. Any time a setting input
pop up is displayed the rest of the interface is disabled until the pop up is closed. Canceling an input pop up entry will leave the
associated setting unchanged.
4.3 System Measurement
■The first three measurement panels are the dual high precision transducers: DPCAL, DPMON, and AUX.
■Each of these three panels is further divided into two sub-panels, the absolute measurement on top and the differential
measurement on bottom.
■Each sub-panel includes the transducer id and unit of measure with an absolute or gauge designation. Each sub-panel header
will also include an A# or D# designator for the transducer’s associated output port on the rear panel.
■Beneath the three dual transducer panels is the PREF transducer panel.The PREF panel is divided into three sub-panels
including the PREF pressure reading, the PREF reading rate of change, and the control set point.
■The rate sub-panel can be tapped to toggle between seconds and minutes scales.
■The set point sub-panel can be tapped to activate the input panel (discussed in detail later).
■Beneath the PREF panel is the barometric measurement panel and the internal temperature panel. The internal temperature
panel can be tapped to cycle the temperature units.
4.4 System Configuration
The configuration categories are activated by tapping one of the four category buttons across the bottom right section of the
screen:
Sensors ■active by default boot-up
■includes button to save configuration changes - only active if
there are unsaved changes to the system configuration
■provides configuration of system pressure units, transducer
speed, tranducer synchronization, transducer zero offset,
head pressure correction
Regulator ■Provides interface to confrol system pressure routing,
regulator operational mode and set point jogging
■Includes button to save configuration changes - only active if
there are unsaved changes to the system configuration
Remote ■provides settings for remote communication with unit
■Includes button to save configuration changes - only active if
there are unsaved changes to the system configuration
Info ■provides information about the unit itself and installed
transducers
4.4.1 Sensor Configuration
The first sub-section of the sensor configuration category is system pressure units.

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Mensor operating instructions Pressure verification system, Model 9476
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■Pressure units are set by tapping the button of the desired unit. Use the buttons with left and right pointing arrows to scroll
through the list of available pressure units.The buttons with single arrows scroll a single page at a time.The buttons with double
arrows jump to the first or last page of units.The active system pressure unit is saved to the system configuration and restored at
boot up. The default system pressure unit is psi. System pressure units are applied globally, all pressure readings use the same
pressure unit when set.
■The pressure transducer speed (reading rate) is set by tapping one of the 4 transducer speed options: Slow, Medium, Fast, or
Fastest.The transducer speed header also includes a label displaying the calculated reading rate in hertz. Transducer reading
synchronization can also be turned on or off using the synchronization buttons.Transducer speed and synchronization settings
only affect the DPCAL, DPMON, and AUX transducers. When synchronization is turned off the transducers are each read as
fast as possible without synchronization messages sent to the transducers.Turning transducer synchronization on introduces
extra delay between sets of readings, but ensures sets of readings are aligned within 100 microsecond frames.Transducer
speed and synchronization settings are saved to the system configuration and restored at boot up. The default transducer speed
is medium and transducer synchronization is on by default.
■Transducer zero offset is used to toggle the calculated reference offset.This feature has no effect unless the regulator zero
process is performed at least once (discussed in detail in regulator configuration). The zero offset applies an offset determined
from the barometric pressure reading for absolute transducers in the system and a zero adjustment for gauge transducers in the
system. The barometric transducer is not affected by the zero offset setting.The zero offset setting is not saved to the system
configuration and is off by default.
■Head pressure correction is used to compensate for height differences between the internal transducers and the external DUT
or point of measurement. Head correction assumes a single point configuration applied to all transducers in the unit equally
(head correction settings cannot differ among transducers).The head correction calculation uses density, gravity and a height
differential to calculate a pressure offset. Use positive height values when the DUT or point of measurement is above the 9476,
negative values when the DUT or point of measurement is below the 9476.The head correction offset is disabled when off and
applied to all absolute transducers except the baro when on. When the height value is zero no offset is applied. Head correction
settings are saved to the system configuration and restored at boot up. Head correction is disabled by default.
4.4.2 Regulator Configuration and Control
■The first sub-section of the regulator configuration category is an interactive plumbing schematic to control measurement
routing in the system.
Across the top are output indicators labeled A# and D# which correspond to each associated [A]bsolute and [D]ifferential
transducer output port on the rear panel. Directly beneath each output indicator are output isolation solenoid indicators.These
indicators can be tapped to manually toggle their open/close state.When closed they are dark gray in color and change to
green when open.The vertical column of solenoid indicators on the left side are control isolation solenoids. The control isolation
solenoids are used to route individual transducer channels to the PREF pressure control channel. When solenoids are open
the channel route lines will also change to green to indicate the exposed route. The output isolation solenoids can be toggled
at any time without limitation.The control isolation solenoids have several limitations imposed by the instrument software which
make them appear unresponsive under certain conditions.The system will prevent control routing to transducers if it could cause
overpressure to the routed transducer.The system also prevents simultaneous routing of both the absolute and differential sides
of a dual transducer. Where over pressure is possible the solenoids will not open. Where abs/diff routing is mutually exclusive, the
opposite side of a dual transducer may automatically close if already open.
■The second sub-section of the regulator configuration category is the regulator mode selection which includes Measure,
Control, Vent, and Zero modes.
Measure mode will internally isolate the regulator from all transducer routes. While in measure mode solenoid routing can be
manually toggled, but the current set point may prevent some solenoids from opening depending on the range of the routed
transducer channel(s). Measure mode is the default operational mode at boot up. Measure mode is also used for leak checking
(discussed in detail later). Normal operation of measure mode does not require a pressure or vacuum supply.
Control mode is used to drive the PREF channel (and any manually routed measurement channels) to a desired pressure set point.
Control mode operation requires a pressure supply source and optional vacuum source as described in the Initial Setup section.
In control mode the regulator output is automatically routed to the PREF channel, but PREF output (A1) on the rear panel must
be manually toggled. PREF control uses absolute pressure readings.When routing to gauge (differential) channels care must be
taken to determine the appropriate absolute set point needed to drive to a desired gauge pressure.To change the control set point
tap the “Setpoint” sub-panel of the PREF display panel on the left side of the screen. A numeric input window will pop up aligned to
the set point display.To cancel/close the input pop up tap the red “X” button at the top right. The top header of the input pop up will
display the minimum and maximum acceptable values for the set point.The min/max range is based on several factors: ranges of

16 Mensor operating instructions Pressure verification system, Model 9476
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transducers installed, current solenoid routing, and current barometric pressure.The min/max values will be based on the smallest
range transducer channel currently installed and routed to the PREF channel.The ranges of the absolute transducer channels are
also limited by the corresponding differential range.
Vent mode is used to release the control channel pressure to atmosphere through the vent port on the rear panel. Any transducer
channels routed to the PREF channel will also be vented.
Zero mode is used to calculate transducer offset values (null readings). Zero mode differs from the other three modes in that it’s
an automated temporary mode. Zero mode first vents the system completely then gathers transducer readings to calculate the
new zero offset values. When the zero process completes, the system automatically switches to vent mode. Zero mode can be
canceled at any time by changing to a different operating mode. Completion of zero mode does not automatically turn on and apply
the calculated zero offsets.The offsets are only applied when manually turned on using the Transducer Zero Offset setting in the
Sensors configuration category. Existing zero offset values (if any) are cleared every time Zero mode is activated.
Zero mode also overrides the solenoid activation restrictions during the venting process to open all transducer channels to the vent
simultaneously. Upon completion of zero mode, the transducer channel isolation solenoids will remain open until manually closed
or manually changing to control mode. Zero mode will take anywhere between 10 seconds up to several minutes depending on
how long it takes the system to vent.Venting duration will depend on controlled pressure and volume at the time of vent. Proper
zero mode functionality will result in all absolute transducer readings being as close to the barometric reading as possible and all
gauge (differential) readings being as close to zero as possible (while still vented).The transducer zero offset values are applied
at the instrument software level, no changes are made to the transducers themselves. Zero mode is not part of, or a substitute for,
transducer calibration procedures. Calculated zero offset values are not saved to the system configuration.
■The final sub-section of the regulator configuration category is the set point jogging interface. Small or large increments can be
applied to the control set point by tapping the up and down arrows on either side of the panel.The actual increments can be set
by tapping the big and small input boxes then entering the new values on the input pop up window. Big and small jog step values
used are saved to the system configuration.
4.4.3 Remote Configuration and Control
■The first sub-section of the remote configuration category is the RS-232 serial port settings panel.
Here the user can select the serial baud, data bits, parity, and stop bits settings.The default serial communication configuration
is 57600 baud, 8 data bits, no parity, and 1 stop bit. The serial configuration settings are applied immediately upon changing any
of the settings so any active serial connections will need to re-connect with the new settings. The serial settings are saved to the
system configuration.
■The second sub-section of the remote configuration category is the IPv4 Ethernet settings panel.
Here the user can select the IP address, gateway, net mask, and port for IPv4 connections.The IPv4 settings are applied
immediately upon changing any of the settings so any active IPv4 connection will need to re-connect with the new settings.The
IPv4 settings are saved to the system configuration.
■The third sub-section of the remote configuration category is the IPv6 Ethernet settings panel.
Here the user can select the IP address, net mask, and port for IPv6 connections.The IPv6 settings are applied immediately upon
changing any of the settings so any active IPv6 connection will need to re-connect with the new settings.The IPv6 settings are
saved to the system configuration.
■Both of the ethernet settings panels include a connection status icon in the top right corner.
The icons will have two device indicators using colors to indicate status. A gray/gray icon with a red “x” indicates a disconnected
cable or an error with the connection, possibly due to a problem with the Ethernet settings. The disconnection icon may also briefly
appear when connection settings are changed. A green/gray icon indicates a ready (listening) state. A green/green icon indicates
an active connection with the associated protocol. In addition to these indicator icons, the underlying operating system may
occasionally display brief pop up bubbles describing changes in Ethernet connection states.
■Even though changes to settings for all communication methods are applied immediately, the system configuration needs to be
saved manually after changes for the new settings to persist after rebooting the unit.
All three communication methods can be utilized simultaneously, but for optimal performance, only a single method should be
used at a time.

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Mensor operating instructions Pressure verification system, Model 9476
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4.4.4 System Info
The Info category displays system details including model number, instrument software version, serial number and details about
each transducer installed in the unit. Each transducer info panel displays the model, firmware version, serial number, date of
calibration, pressure range, and native pressure units. The dual transducer panels will display two ranges for absolute and gauge
designated by an “A” or “G” suffix.The transducer info panel colors match the corresponding measurement display panels on the
left half of the screen.These panels will be blank if a transducer is not installed in the system or if the system failed to detect the
transducer at start up.
4.5 Typical Operating Processes
4.5.1 Pressure Measuring and Monitoring
■Typical operation consists of connecting the pressure hoses to the appropriate rear panel pressure ports for measurement
and monitoring.The unit should be powered up and allowed to complete the boot process. Once measurement readings are
displayed on the front panel, the system is fully booted.
■An additional 15 minute warm-up period is required for full transducer accuracy (depending on the environment).
■Measure mode is active by default at boot up.
■After the warm-up period, zero mode should be used as described in the Regulator Configuration and Control section. After
a zero process is performed, the unit will need to be returned to measure mode manually (from vent mode) by using the front
panel interface or remote commands.
■Output isolation solenoids are closed by default at boot up. Each transducer channel requiring external measurement must have
its output isolation solenoid manually opened by using the solenoid control panel on the display or by using the appropriate
remote commands.
■In measure/monitor only conditions, the control isolation solenoids that route transducer channels to the PREF control channel
should be closed, otherwise the transducer channels are no longer isolated from each other. Note that the control isolation
solenoids will be opened during the zeroing process.
■Measurement values can be observed as needed on the front panel interface or read from the unit using remote queries.
Measured values are not logged or saved within the instrument itself, all data must be collected by a remotely connected
system.
4.5.2 Pressure Control
▶Pressure control will require external pressure and optional vacuum sources as described in the Unpacking and Initial Setup
section. Control mode is intended for system leak checking. Control stability is rated at 0.1% of full scale and is not intended for
high precision pressure control.
■Set control mode and the desired set point as described in the Regulator Configuration and Control section.
■Use the solenoid interface panel or remote commands to route pressure to the desired channels.
▶Note: the system will prevent solenoid activation, or set point values that would over-pressure a transducer channel.
■Once controlling to a target pressure there will be immediate changes in transducer readings and the PREF rate reading.
■When the control has settled at the target pressure the PREF pressure reading display will change from black to green text.
Control stability can also be queried using remote commands.
■After completion of control mode operations the system, including all transducer channels, should be vented to release any
trapped pressure.
4.5.3 Leak Testing
▶Begin leak testing by following the procedures in the Pressure Control section.
■Control a single transducer channel to its max pressure range. If the channel fails to achieve stable control, there may be a large
leak present.
■Once stable, wait approximately 5 minutes to achieve stable channel temperature.
■Switch the operational mode to measure, then wait an additional 10 seconds.
■Note the initial PREF channel pressure reading. Wait exactly one minute.
■Note the final PREF channel pressure reading. With all output isolation solenoid valves closed, there should be less than 0.005
psi difference between the initial and final PREF pressure readings. If one or more output isolation solenoid vales are open
during the leak test, the acceptable pressure drop during the test will vary with the amount of volume in the system.
■Repeat the leak test procedure for each transducer channel in the system.
4.5.4 Remote Operation
▶All functions available from the front touch panel interface are also available remotely using the remote command set.
▶Communication with the 9476 is established with RS-232 serial communication or ethernet communication. Ethernet
communication is available using both IPv4 and IPv6 protocols.
▶Communication using multiple methods simultaneously is possible, but not recommended.

18 Mensor operating instructions Pressure verification system, Model 9476
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▶Remote communication uses case-insensitive ASCII commands and queries.
▶Communication is identical regardless of connection method used (e.g.: serial or ethernet).
▶All commands and queries sent to the 9476 should be terminated with a carriage return (0x0D) and line feed (0x0A) pair. All
responses are terminated with a carriage return and line feed pair. Serial and ethernet settings are end-user configurable.
4.6 Serial Communication Configuration
▶The RS-232 port is located on the rear panel as a DB9F configured as a DTE port.
▶A cross-over cable or null modem adapter should not be required for connection to a PC or similar DCE equipment.
▶Baud is user configurable to 9600, 19200, 38400, 57600 (default), or 115200 bps.
▶Data bits are user configurable to 7 or 8 (default) bits.
▶Stop bits are user configurable to 0, 1 (default), or 2.
▶Parity is user configurable to none (default), odd, or even.
▶All serial settings can be configured using the touch panel interface on the “Remote” panel.
▶Serial settings can also be configured remotely. However, every serial setting change will immediately reinitialize the serial
communications port requiring a reconnect with the new settings.
▶Changes to the serial configuration will not persist unless the system configuration is saved. Erasing the system configuration
will reset the serial configuration to default values.
4.7 Ethernet Communication Configuration
▶The ethernet port is located on the rear panel as an RJ45 jack with GbE. Both IPv4 and IPv6 are supported with user
configurable IP addresses, net masks, gateway, and ports.
▶Both IPv4 and IPv6 protocol connections can be established simultaneously, but is not recommended.
▶All ethernet settings can be configured using the touch panel interface on the “Remote” panel. The “Remote” panel also has
ethernet connection indicator icons to show the status of each protocol.
▶A green/gray icon is shown for a “listening” connection.
▶A green/green icon is shown for an active connection.
▶A gray/gray icon with a red “x” is shown when there is no cable connection detected.
▶Ethernet settings can also be configured remotely. However, every ethernet setting change will immediately reinitialize the
ethernet communications requiring a reconnect with the new settings.
▶Changes to the ethernet configurations will not persist unless the system configuration is saved. Erasing the system
configuration will reset the ethernet configurations to their default values.
4.8 Remote Command Set
The remote command set is comprised of messages categorized as commands, queries, and meta-queries. All messages
should be terminated with a carriage return and line feed pair (CRLF: 0x0D 0x0A). All responses are terminated with a CRLF pair,
however, not all commands result in a response from the unit. Messages categorized as “commands” will not generate a response.
Messages categorized as queries and meta-queries will always respond in a manner detailed in the command set table. Queries
and meta-queries are composed of the message name followed by one of the query characters. The standard query character is
a question mark (?) and is used to request a value from the unit. Meta-queries are used to request additional information about a
command or query in the remote command set.
■The following list describes the general functionality of each query and meta-query character:
= : Used to assign a new value to a system setting. Must be followed by an appropriate value as described in the command set
table.
? : Standard query to request a value or status.
# : Request the default value of a system setting, if supported. This is the value used for a system setting when the configuration is
reset.
- : The minimum value the system will accept for a setting, if supported.
+ : The maximum value the system will accept for a setting, if supported.
$ : A short description of the command/query, if supported.
■Example commands:
SAVECFG
HCON
MODE=VENT
SCCA=1
■Example Queries:

19
Mensor operating instructions Pressure verification system, Model 9476
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STATUS?
RDGS?
■Example Meta-Queries:
XSPD#
HCGRAVITY+
AUXCONN$
A single asterisk (*) followed by CRLF can be sent to the unit to get a comma separated list of all valid remote commands.
Each command name will have a suffix of all the query characters supported by that message. If the message refers to a saved
configuration value there will also be a caret (^) symbol in the suffix list.
Many commands/queries in the command set use boolean values.When assigning boolean values 0, NO, OFF, and FALSE all
equate to a false value, 1, YES, ON, and TRUE all equate to a true value. However, all boolean queries always respond with False
or True.
Sensor Commands and Queries
All pressure commands and queries use values in the current system pressure units.
All temperature commands and queries use values in the current system temperature units.
Message Function Example Usage Example
Response
Features
BARO pressure reading of BARO transducer BARO? 14.3542 ?$
A1 absolute pressure reading of PREF transducer A1? 15.8121 ?$
D2 dierential pressure reading of DPCAL transducer D2? 2.5297 ?$
A2 absolute pressure reading of DPCAL transducer A2? 25.5442 ?$
D3 dierential pressure reading of DPMON transducer D3? 2.5297 ?$
A3 absolute pressure reading of DPMON transducer A3? 15.8121 ?$
D4 dierential pressure reading of AUX transducer D4? 0.0001 ?$
A4 absolute pressure reading of AUX transducer A4? 29.9815 ?$
CAL both dierential and absolute pressure readings of the
DPCAL transducer
CAL? (DIFF, ABS)
2.1019, 15.6441
?$
MON both dierential and absolute pressure readings of the
DPMON transducer
MON? (DIFF, ABS)
2.1019, 15.6441
?$
AUX both dierential and absolute pressure readings of the AUX
transducer
AUX? (DIFF, ABS)
2.1019, 15.6441
?$
RDGS all transducer pressure readings in the following order
separated by commas: BARO, PREF, CAL:DIFF, CAL:ABS,
MON:DIFF, MON:ABS, AUX:DIFF, AUX:ABS
RDGS? 14.3582,
13.4630, 0.5618,
13.8754, 0.5403,
13.8433, 0.5319,
14.6485
?$
ALLRDGS same as RDGS query with temperature reading and status
word appended.This is also the default system query, sending
only a question mark to the unit yields the same response.
ALLRDGS?
?
14.3584,
13.4640,
-0.5615,
13.8766,
-0.5400,
13.8446,
-0.5320,
14.6496, 25.00,
12336
?$

20 Mensor operating instructions Pressure verification system, Model 9476
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HIDEAUX get or set a boolean value to hide AUX readings from the
RDGS and ALLRDGS queries.The AUX transducer is
optional in the system. When not installed there will be NaN
placeholders in the responses from the RDGS and ALLRDGS
queries. Set HIDEAUX to true to omit the NaN placeholders
from those queries. If the AUX transducer is installed, this set-
ting is ignored.
HIDEAUX?
HIDEAUX=0
HIDEAUX=1
HIDEAUX=True
HIDEAUX=False
True or False
(when queried)
?=#$
AUXCONN returns True if the AUX transducer is present, False otherwise AUXCONN? True or False ?$
XSPD get or set the pressure transducer reading speed, A, B, C, or
D where A is the slowest and D is the fastest. Only aects
DPCAL, DPMON, and AUX transducers.
XSPD=A
XSPD=B
XSPD=C
XSPD=D
XSPD?
A, B, C, or D ?=-+#$
XSYNC get or set a boolean value to toggle transducer reading
synchronization. Only aects DPCAL, DPMON, and AUX
transducers.
XSYNC=True
XSYNC=False
XSYNC?
True or False ?=#$
XRDRATE gets the calculated pressure transducer reading rate in Hz.This will be
aected by the XSPD and XSYNC settings. This value will be unstable
for a few seconds after changing XSPD and XSYNC settings.
XRDRATE? 17.3 ?$
NULLRDGS get or set a boolean value to apply calculated zero osets to pressure readings.
BARO transducer is not aected.
NULLRDGS=True
NULLRDGS=False
NULLRDGS?
True or False ?=$
NULLON turns on zero osets. Same as NULLRDGS=True NULLON $
NULLOFF turns o zero osets. Same as NULLRDGS=False NULLOFF $
NULLCALC activates regulator “Zero” mode to calculate zero osets. Regulator switches to
“Vent” mode when complete. Use MODE=MEAS or MODE=VENT to cancel.
NULCALC $
A1RPS rate of change of the PREF transducer in units per second A1RPS? 2.15 ?$
A1RPM rate of change of the PREF transducer in units per minute A1RPM? 12.42 ?$
PRESHIGH True if any pressure transducer is reading outside its calibrated range, False
otherwise.
PRESHIGH? True or False ?$
TEMP Temperature sensor reading. TEMP? 25.93 ?$
TEMPHIGH True if temperature reading is below temperature minimum or
above temperature maximum. False otherwise.
TEMPHIGH? True or False ?$
TEMPMIN Temperature minimum.Temperature readings below this value
will trigger the temperature range status alert.
TEMP-
MIN=20.0
TEMPMIN?
20.00 ?=#$
TEMPMAX Temperature maximum.Temperature readings above this
value will trigger the temperature range status alert.
TEMP-
MAX=70.0
TEMPMAX?
70.00 ?=#$
HCSTATUS get or set a boolean value to apply calculated head pressure oset to
pressure readings.
HCSTATUS=True
HCSTATUS=False
HCSTATUS?
True or False ?=#$
HCON turns head pressure oset on. Same as HCSTATUS=True HCON $
HCOFF turns head pressure oset o. Same as HCSTATUS=False HCOFF $
HCDENSITY get or set the head pressure correction density value in kg/m² HCDENSI-
TY=1.25
HCDENSITY?
1.225 ?=-+#$
HCGRAVITY get or set the head pressure correction gravity value in m/s³ HCGRAV-
ITY=9.8
HCGRAVITY?
9.80665 ?=-+#$