Fluke RUSKA 7350 User Manual
RUSKA 7350
High Pressure Gas Controller/Calibrator
PN 3952249
November 2010
© 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
Users Manual
LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance
with its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is
available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the
applicable international price. Fluke reserves the right to invoice Buyer for importation costs of
repair/replacement parts when product purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99
To register your product online, visit register.fluke.com
Table of Contents
Chapter Title Page
1 General Information ............................................................................ 1-1
Introduction........................................................................................................ 1-1
General Information........................................................................................... 1-1
How to Contact Fluke ........................................................................................ 1-1
Safety Information ............................................................................................. 1-2
Safety Summary ............................................................................................ 1-2
Keep Away from Live Circuits ..................................................................... 1-2
Do Not Service or Adjust Alone.................................................................... 1-2
Resuscitation.................................................................................................. 1-2
Electrostatic Discharge Sensitive Parts ......................................................... 1-2
Compressed Air ............................................................................................. 1-2
Personal Protective Equipment...................................................................... 1-2
Inert Gases..................................................................................................... 1-2
AC Main Plug, Switch, and Power Cord....................................................... 1-2
Symbols Used in this Manual ............................................................................ 1-3
Features.............................................................................................................. 1-3
Mercury-Free................................................................................................. 1-3
NIST Traceability.......................................................................................... 1-3
Power Supply................................................................................................. 1-3
Measure While Control ................................................................................. 1-3
Friendly Display ............................................................................................ 1-3
Adjustable Pressure Display.......................................................................... 1-3
Ease of Operation .......................................................................................... 1-4
Easily Programmable..................................................................................... 1-4
Attractive Desktop Packaging ....................................................................... 1-4
Power-On Self Test ....................................................................................... 1-4
Ease of Calibration ........................................................................................ 1-4
Automatic Zero Adjust .................................................................................. 1-4
Automatic Head Correction........................................................................... 1-4
Choice of Medium......................................................................................... 1-4
Choice of Display Units ................................................................................ 1-4
Communications Interface............................................................................. 1-4
Standard Equipment & Options......................................................................... 1-5
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Users Manual
2 Theory of Operation ............................................................................ 2-1
Introduction........................................................................................................ 2-1
Power Supply..................................................................................................... 2-1
Electronics Section ............................................................................................ 2-1
Back Plane Board .......................................................................................... 2-1
Microprocessor Board ................................................................................... 2-1
IEEE-488 Interface........................................................................................ 2-3
Front Panel..................................................................................................... 2-3
Motor Controller............................................................................................ 2-3
76xx Interface Board ..................................................................................... 2-4
Pneumatic Module ............................................................................................. 2-4
Pneumatic Pump............................................................................................ 2-4
Gearmotor...................................................................................................... 2-4
System Valve................................................................................................. 2-4
Electronics Regulator .................................................................................... 2-5
Dome Regulator............................................................................................. 2-5
System Transducer ........................................................................................ 2-5
Test Port ........................................................................................................ 2-5
Drive Air-Supply Port ................................................................................... 2-5
Gas Supply Port............................................................................................. 2-5
3 Installation ........................................................................................... 3-1
Introduction........................................................................................................ 3-1
Unpacking the RUSKA 7350............................................................................. 3-1
Cautions ............................................................................................................. 3-2
Powering Up the RUSKA 7350......................................................................... 3-2
Pneumatic Connections...................................................................................... 3-2
Drive Air Supply Port.................................................................................... 3-2
Test Port ........................................................................................................ 3-2
Gas Supply Port............................................................................................. 3-2
4 Local Operation ................................................................................... 4-1
Local Operation ................................................................................................. 4-1
Numeric Keypad............................................................................................ 4-1
Function Keys................................................................................................ 4-1
Rotary Knob .................................................................................................. 4-1
Cancel, Previous............................................................................................ 4-2
Tutorial .............................................................................................................. 4-3
Selecting Language ....................................................................................... 4-5
Selecting Mode of Operation......................................................................... 4-5
Tare Mode ................................................................................................. 4-5
Triple Range (Optional) ............................................................................ 4-6
Main Menu......................................................................................................... 4-6
Controlling Pressure .......................................................................................... 4-6
Setting the Pressure Set-Point ....................................................................... 4-6
Entering/Exiting Control Mode..................................................................... 4-7
Vent.................................................................................................................... 4-7
Step/Jog.............................................................................................................. 4-7
Stepping......................................................................................................... 4-7
Setting Step Size............................................................................................ 4-7
Jogging .......................................................................................................... 4-7
Menu .................................................................................................................. 4-8
Menu | Setup.................................................................................................. 4-8
Menu | Setup — Limits ............................................................................. 4-9
ii
Contents (continued)
Menu | Setup — User ................................................................................ 4-11
Menu | Setup — Units............................................................................... 4-13
Menu | Setup — Remote ........................................................................... 4-15
Menu | Setup — System............................................................................ 4-15
Menu | Calibrate ............................................................................................ 4-16
Calibration Password ................................................................................ 4-16
Menu | Program — Storing A Sequence in Memory..................................... 4-17
Preparing to Program ................................................................................ 4-17
Entering a New Program........................................................................... 4-18
Automatically Generating a Program........................................................ 4-20
Changing the Name of a Program............................................................. 4-21
Changing an Existing Program ................................................................. 4-21
Changing the Configuration Stored with a Program................................. 4-22
Running a Program ................................................................................... 4-23
Menu | Test .................................................................................................... 4-24
Menu | Test — Sweep Test ....................................................................... 4-24
Menu | Test — Self Test ........................................................................... 4-25
Menu | Test — Remote Test ..................................................................... 4-25
Menu | Test — Shop1................................................................................ 4-26
Menu | Display............................................................................................... 4-27
Menu | Display — Blank ............................................................................... 4-27
5 Remote Operation ............................................................................... 5-1
Remote Operation .............................................................................................. 5-1
Capabilities ........................................................................................................ 5-1
IEEE-488 ....................................................................................................... 5-1
RS-232........................................................................................................... 5-2
Remote/Local Operation.................................................................................... 5-2
Configuration ..................................................................................................... 5-3
Device Messages................................................................................................ 5-3
SCPI Command Format ................................................................................ 5-3
SCPI Response Format.................................................................................. 5-3
ANSI/IEEE 488.2-1987 Command Summary............................................... 5-4
SCPI Command Summary ............................................................................ 5-4
Example SCPI Commands ............................................................................ 5-6
SCPI Status Registers .................................................................................... 5-7
6005 Interface Panel Emulation......................................................................... 5-8
Serial Operation ................................................................................................. 5-9
6 Maintenance......................................................................................... 6-1
Introduction........................................................................................................ 6-1
Observing the RUSKA 7350’s Full Scale Rating.............................................. 6-1
Observing the Software Version Number.......................................................... 6-1
Preventive Maintenance..................................................................................... 6-1
Initiating the RUSKA 7350’s Self Test......................................................... 6-1
Removing the RUSKA 7350’s Cover ........................................................... 6-1
Processor Battery ............................................................................................... 6-2
Calibration ......................................................................................................... 6-2
Calibration Instructions — Single Sensor ..................................................... 6-3
Preparation..................................................................................................... 6-3
Storing the Coefficients................................................................................. 6-4
Editing the Calibration Coefficients .............................................................. 6-5
Zeroing .......................................................................................................... 6-5
RUSKA 7350 Pump Lubrication....................................................................... 6-6
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RUSKA 7350
Users Manual
Approved Lubrications.................................................................................. 6-6
Frequency of Lubrication .............................................................................. 6-6
Lubrication Procedure ................................................................................... 6-6
Fuse.................................................................................................................... 6-6
Cleaning............................................................................................................. 6-6
7 Preparation for Storage and Shipment.............................................. 7-1
Disconnection Instructions................................................................................. 7-1
Packing Instructions........................................................................................... 7-1
Shipping Instructions ......................................................................................... 7-3
Appendices
A Summary of Specifications ......................................................................... A-1
B Summary of Error Messages ....................................................................... B-1
iv
List of Tables
Table Title Page
1-1. Symbols.................................................................................................................. 1-3
1-2. RUSKA 7350 - Options List .................................................................................. 1-5
2-1. Conversion Factors................................................................................................. 2-3
3-1. General Specification and Parameters.................................................................... 3-1
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RUSKA 7350
Users Manual
vi
List of Figures
Figure Title Page
2-1. RUSKA 7350 Block Diagram................................................................................ 2-2
2-2. Pneumatic Diagram................................................................................................ 2-4
4-1. RUSKA 7350 Front Panel...................................................................................... 4-1
4-2. Menu Tree .............................................................................................................. 4-2
4-3. Main Menu ............................................................................................................. 4-3
4-4. Units - Menu .......................................................................................................... 4-3
4-5. Main Menu - Entering Pressure ............................................................................. 4-4
4-6. Main Menu - Control Mode ................................................................................... 4-5
4-7. Main Menu ............................................................................................................. 4-6
4-8. Menu ...................................................................................................................... 4-8
4-9. Menu | Setup | Menu .............................................................................................. 4-8
4-10. Menu | Setup | Limits - Menu................................................................................. 4-9
4-11. Menu | Setup | User - Menu.................................................................................... 4-11
4-12. Menu | Setup | Units - Menu .................................................................................. 4-13
4-14. Menu | Setup | Remote - Menu............................................................................... 4-15
4-15. Menu | Setup | System - Menu ............................................................................... 4-15
4-16. Menu | Program - Menu ......................................................................................... 4-18
4-17. Menu | Program | Edit - Menu................................................................................ 4-19
4-18. Menu | Program | Edit | Auto - Menu ..................................................................... 4-20
4-19. Menu | Program | Edit | Name - Menu.................................................................... 4-21
4-20. Menu | Program | Edit - Menu................................................................................ 4-22
4-21. Menu | Program | Config - Menu ........................................................................... 4-23
4-22. Menu | Program | Run - Menu................................................................................ 4-23
4-23. Menu | Test - Menu ................................................................................................ 4-24
4-24. Menu | Test | Sweep - Menu................................................................................... 4-25
4-25. Menu | Test | Remote - GPIB Menu....................................................................... 4-26
4-25. Menu | Test | Remote | Serial 1 - Menu.................................................................. 4-26
4-26. Menu | Test | Shop1 - Menu ................................................................................... 4-26
4-27. Menu | Display - Menu........................................................................................... 4-27
7-1. Packing the Calibrator............................................................................................ 7-3
vii
RUSKA 7350
Users Manual
viii 1-1
Introduction
This manual contains operation and routine and preventive maintenance instructions for
the RUSKA 7350 High Pressure Gas Controller/Calibrator manufactured by Fluke. This
portion of the manual provides general information about the RUSKA 7350 and presents
its features and options.
General Information
The RUSKA 7350 uses transducers to provide the precise measurement of pressure.
During normal operation, the RUSKA 7350 performs in either measure mode or
control mode.
Chapter 1
General Information
In control mode, the RUSKA 7350 simultaneously measures and controls pressure.
Control mode is commonly used in the calibration and testing of pressure gauges,
transducers, pressure switches, and production pressure instruments.
In Measure mode the RUSKA 7350 measures pressure. Typically, measure mode finds
applications in research laboratories, testing of gauges and transducers.
How to Contact Fluke
To order accessories, receive operating assistance, or get the location of the nearest Fluke
distributor or Service Center, call:
• Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)
• Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
• Canada: 1-800-36-FLUKE (1-800-363-5853)
• Europe: +31-402-675-200
• China: +86-400-810-3435
• Japan: +81-3-3434-0181
• Singapore: +65-738-5655
• Anywhere in the world: +1-425-446-5500
Or, visit Fluke's website at www.fluke.com
To register your product, visit http://register.fluke.com
To view, print, or download the latest manual supplement, visit
http://us.fluke.com/usen/support/manuals
.
.
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RUSKA 7350
Users Manual
Safety Information
Safety Summary
Keep Away from Live Circuits
Do Not Service or Adjust Alone
Resuscitation
The following are general safety precautions that are not related to any specific
procedures and do not appear elsewhere in this publication. These are recommended
precautions that personnel must understand and apply during equipment operation and
maintenance to ensure safety and health and protection of property.
Operating personnel must at all times observe safety regulations. Do not replace
components or make adjustments inside the equipment with the voltage supply connected.
Under certain conditions, dangerous potentials may exist when the power control is in the
off position due to charges retained by capacitors. To avoid injuries, always remove
power from, discharge, and ground a circuit before touching it.
Do not attempt internal service or adjustment unless another person capable of rendering
aid and resuscitation is present.
Personnel working with or near dangerous voltages shall be familiar with modern
methods of resuscitation. Such information may be obtained from your local American
Medical Association.
Electrostatic Discharge Sensitive Parts
W Caution
Electrostatic discharge sensitive (ESDS) is applied to low
power, solid-state parts which could be damaged or destroyed
when exposed to discharges of static electricity. Maintenance
personnel are often not aware that an ESDS part has been
damaged or destroyed because electrostatic discharges at
levels less than 4,000 volts cannot be seen, felt or heard.
Compressed Air
Use of compressed air can create an environment of propelled foreign matter. Pressure
system safety precautions apply to all ranges of pressure. Care must be taken during
testing to ensure that all pneumatic connections are properly and tightly made prior to
applying pressure. Personnel must wear eye protection to prevent injury.
Personal Protective Equipment
Wear eye protection approved for the materials and tools being used.
Inert Gases
Operation of pressure equipment may be accompanied by the discharge of inert gases to
the atmosphere. The result is a reduction of oxygen concentration. Therefore, it is
mandatory that all exhaust gases be vented outside the work area.
W Warning
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
1-2
AC Main Plug, Switch, and Power Cord
The AC main plug, switch and power cord shall remain readily accessible for operation.
General Information
Symbols Used in this Manual 1
Symbols Used in this Manual
In this manual, a Warning identifies conditions and actions that pose a hazard to the user.
A Caution identifies conditions and actions that may damage High Pressure Gas
Controller/Calibrator.
Symbols used on the High Pressure Gas Controller/Calibrator and in this manual are
explained in Table 1-1.
Table 1-1. Symbols
Symbol Description
B AC (Alternating Current)
J Earth Ground
W Important Information: refer to manual
X Shock Hazard
Do not dispose of this product as unsorted
~
municipal waste. Go to Fluke’s website for
recycling information.
Features
The following features are available on all RUSKA 7350s.
Mercury-Free
All components in the RUSKA 7350 are mercury-free.
NIST Traceability
All RUSKA 7350s are calibrated per ANSI/NCSL Z-540-1-1994 using RUSKA
deadweight gauges that are directly traceable to the National Institute of Standards and
Technology (NIST). All instruments are provided with a NVLAP accredited calibration
certificate.
Power Supply
The RUSKA 7350s are either 100 – 120VAC, 1PH, 50/60 HZ or 220 – 240VAC, 1PH,
50/60 HZ.
Measure While Control
The RUSKA 7350 simultaneously digitally displays the commanded pressure, the actual
pressure, and the difference between the two. A bar graph indicates how close the actual
pressure is to the commanded pressure, as well as how close the commanded pressure is
to the RUSKA 7350’s full scale pressure.
P
This equipment meets the requirements of all
relevant European safety directives. The
equipment carries the CE mark
Friendly Display
The RUSKA 7350’s color active matrix TFT display combines a bright, low-glare
readout with a wide viewing angle. During normal operation, the measured pressure is
easily visible from a distance of 10 feet (3 meters).
Adjustable Pressure Display
The pressure display may be adjusted to show one decimal greater than or less than the
default resolution.
1-3
RUSKA 7350
Users Manual
Ease of Operation
Easily Programmable
Attractive Desktop Packaging
Power-On Self Test
Ease of Calibration
An intuitive, menu-driven interface makes the RUSKA 7350 easy to use. Frequently
used selections, such as the units of measure, are stored in memory each time the
RUSKA 7350 powers up.
The RUSKA 7350’s powerful microprocessor provides the basis for smart electronics.
With a few simple keystrokes, the user set limits on the system pressure, create unique
units of measure, program a test sequence, and more.
A sturdy aluminum case houses all of the RUSKA 7350’s pneumatics, electronics, and
user controls. With the optional rack mount kit, this standard 19" EIA chassis fits easily
into a rack mount system.
Upon power-up, the RUSKA 7350 quickly tests its hardware and software. After the
RUSKA 7350 completes this test, the user can select more extensive self-tests for the
pneumatics and electronics.
A four-point calibration can be performed either remotely or entirely from the front panel.
No disassembly is required, and there are no potentiometers to tune.
Automatic Zero Adjust
At the user’s request, the RUSKA 7350’s software automatically performs the zero
adjustment, with no potentiometers to tune.
Automatic Head Correction
The RUSKA 7350 automatically corrects for head pressure between the RUSKA 7350
and the device under test (DUT), taking into account the density of the test gas.
Choice of Medium
The Pneumatic RUSKA 7350 can be used with any dry, clean nitrogen as the pressure
medium.
Choice of Display Units
Standard units include inches of mercury at 0 °C and 60 °C, kiloPascals, bars, pounds per
square inch, inches of water at 4 °C, 20 °C, and 25 °C, kilograms per square centimeter,
millimeters of mercury, centimeters of mercury at 0 °C, and centimeters of water at 4 °C.
Altitude and airspeed units include feet, meters, knots, and kilometers/hour. In addition to
these predefined units, four user-defined units are programmable.
Communications Interface
The RUSKA 7350 includes standard RS-232 serial and IEEE-488 interfaces. The user’s
computer communicates with the RUSKA 7350 through the Standard Commands for
Programmable Instruments (SCPI) protocol. The RUSKA 7350 can also be configured to
accept existing software written for the RUSKA Series 6000 DPG.
1-4
General Information
Standard Equipment & Options 1
Standard Equipment & Options
A standard pneumatic RUSKA 7350 comes with this manual, a power cord, a grease gun
and grease. The standard pneumatic RUSKA 7350 is fully functional, but the following
options are also available.
IEEE-488 Interface: All models of the RUSKA 7350 have an IEEE-488 (GPIB) card. The
user’s computer communicates with the RUSKA 7350 through the Standard Commands
for Programmable Instruments (SCPI) protocol. In addition, software written for the
Series 7000 CALIBRATOR and Series 6000 DPG is fully compatible with the
RUSKA 7350.
Additional Power Cords: Additional power cords are available for most countries of the
world.
Table 1-2. RUSKA 7350 - Options List
Option Part Number
Communication Software Contact Fluke
User’s Manual 3952249
Power Cord, USA and Canada 284174
Power Cord, Central Europe 769422
Power Cord, India 782771
Power Cord, Japan 3898323
Power Cord, Australia/New Zealand 658641
Battery 2135249
1-5
RUSKA 7350
Users Manual
1-6
Introduction
The RUSKA 7350’s power supply, electronics, pneumatics, and sensor combine to form
a complete, stand-alone, measure and control instrument. This portion of the manual
breaks the RUSKA 7350 down into its component modules (Figure 2-1) and provides a
general discussion of each.
Power Supply
The RUSKA 7350 is set up as either a 120 – 130 VAC, 50/60 Hz or 220 – 240 VAC,
50/60 Hz single phase as required by customer. Check label next to power supply inlet.
Chapter 2
Theory of Operation
Electronics Section
The RUSKA 7350’s electronics section consists of the Back Plane Board, the
Microprocessor Board, the 76XX Interface Board, the Option Board, the IEEE interface,
and the Front Panel consisting of display and key pad.
Back Plane Board
The Microprocessor Board, the 76XX Interface Board, the Option Board, and the IEEE
Board plugs into the Back Plane Board.
The four voltages produced by the Power Supply are distributed to the Back Plane Board,
where they are conditioned to produce four additional voltages of +5 VDC, -5 VDC,
+12 VDC, and -12 VDC for analog use. The resulting seven DC voltages are then used
either directly or indirectly throughout the entire RUSKA 7350.
Microprocessor Board
All of the RUSKA 7350’s software resides in nonvolatile, programmable, read-only
memory (Flash EPROM) on the Microprocessor Board, which plugs directly into the
Control Board. This software contains all of the instructions that operate the
RUSKA 7350, as well as the conversion factors that the RUSKA 7350 uses to translate
the detected pressure into the units selected by the user. These factors are given in
Table 2-1.
Data that is subject to change after the RUSKA 7350 leaves the factory is held in
electrically erasable, programmable, read-only memory (EEPROM) on this Board.
This includes the current units of measure, the coefficients from the zeroing process,
the current pressure medium, and the conversion factors for the four user-defined units
of measure.
When the RUSKA 7350 powers up, its software is loaded into random access memory
(RAM), which is also on the Microprocessor Board. At the same time, the values stored
in EEPROM on the Board are restored to memory.
2-1
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Users Manual
Another important component on the Microprocessor Board is the lithium battery, which
continuously updates the RUSKA 7350’s date and time, even when the unit is powered
down.
The Sensors, Front Panel, the pump expansion and compression limit switches
communicate with this board through cables. The Processor Board also supports the
RS-232 serial interface, which allows the user’s computer to communicate with the
RUSKA 7350.
AIRTEST PORT
Pneumatic Section
MOTOR
CONTROLLER
GEAR MOTOR
76XX INTERFACE
DC POWER
SUPPLY
AC POWER
PUMP
BOARD
AIR REGULATOR
MICROPROCESSOR
BOARD
BACK PLANE
BOARD
OPTION
BOARD
SENSORS
Electronic Section
DISPLAY/
KEY PAD
PANEL
IEEE CARD
2-2
POWER SUPPLY
Figure 2-1. RUSKA 7350 Block Diagram
gld01.eps
Theory of Operation
Electronics Section 2
Table 2-1. Conversion Factors
Symbol Description Conversion Factor
inHg inches of mercury (0 °C) = kPa x 0.2952998
inHg inches of mercury (60 °C) = kPa x 0.296134
kPa kiloPascals = kPa x 1.0
bar bars = kPa x 0.01
psi pounds per inch2 = kPa x 0.1450377
cmH2O centimeters of water (4 °C) = kPa x 10.19744
inH2O inches of water (4 °C) = kPa x 4.014742
inH2O inches of water (20 °C) = kPa x 4.021898
inH2O inches of water (25 °C) = kPa x 4.024108
kg/cm2 kilograms per cm2 = kPa x 0.0101972
mmHg millimeters of mercury (0 °C) = kPa x 7.500605
cmHg centimeters of mercury (0 °C) = kPa x 0.7500605
knots airspeed knots per NASA TN D-822
km/hr kilometers per hour = knots x 1.852
feet feet of altitude per MIL-STD-859A
meters meters of altitude per MIL-STD-859A
user1 user defined = kPa x User defined
user2 user defined = kPa x User defined
Pa user defined (Pascals) = kPa x 1000.0
%FS user defined (percent of full scale)
IEEE-488 Interface
The RUSKA 7350’s IEEE-488 (GPIB) Interface Card, which plugs directly into the
Back Plane Board, provides the RUSKA 7350 with an IEEE-488 Interface. This interface
allows the user to automate the measurement and control processes.
Front Panel
The Microprocessor Board interprets all input from the Front Panel. The Front Panel
contains the active matrix TFT color display, rotary knob and rubberized keys used to
operate the RUSKA 7350.
Motor Controller
This motor controller controls the speed of the motor driving the pump in the pneumatic
section of the 7350. The motor controller receives its analog signal (+/-10VDC) from the
76XX Interface Board and in turn runs the motor at variable speed. The controller can be
configured with jumpers for either 115 VAC or 230 VAC power supply.
2-3
RUSKA 7350
Users Manual
76xx Interface Board
Pneumatic Module
This board interfaces and conditions the pump position signal. The board interfaces
these signals between the electronic and pneumatic module. This board also provides
a 0 – 10 VDC signal to 0 – 100 psi electronic pneumatic regulators and the motor
controller.
The pneumatic section shown in Figure 2-2 houses components that control and
accurately measure pneumatic pressure.
TRANSDUCER
RELIEF
VALVE
TEST
PORT
SUPPLY
PORT
AIR SUPPLY
110 PSI
PNEUMATIC
PUMP
Pneumatic Pump
The pneumatic pump is a positive displacement pump that precisely varies the system
pressure by compressing and expanding system gas. The pump is driven by a variable
speed gear-motor. The pump has a position sensor that tracks the position of the pump
plunger. It has two travel limit switches at each end of its stroke.
AIR-OPERATED
VALVE
SOLENOID
VALVE
Figure 2-2. Pneumatic Diagram
VARIABLE
SPEED
GEARMOTOR
ELECTRONIC
REGULATOR
RELIEF
VALVE
gld02.eps
2-4
Gearmotor
The variable-speed gear motor drives the pneumatic pump. The gear box on the motor
reduces the motor speed.
System Valve
The system valve isolates the pump and system from the gas supply regulators. It is a
high pressure air-operated valve. This valve has a diaphragm operator that requires a
minimum of 60 psi of air pressure to close the valve. The air is supplied to this valve
through a three-way normally-open solenoid valve.
Theory of Operation
Pneumatic Module 2
Electronics Regulator
The electronics regulator supplies a 0 – 100 psi air signal for the dome regulator.
The electronics regulator is driven by a 0 – 10 VDC signal from the interface board.
Dome Regulator
The dome regulators, which are self-relieving, “rough” in the commanded pressure.
The precise pressure is then achieved by the pump after closing the system valve.
System Transducer
The system transducer accurately measures (accuracy is specified as purchased,
0.01% minimum) the controlled pressure. This transducer should be calibrated at
a regular interval to maintain its stated accuracy.
Test Port
The device under test is connected to this port. This port is a 1/8 NPT female.
Drive Air-Supply Port
The supply air is connected to the drive-air supply port. The supply air should be
100 – 110 psi (7 – 7.5 bar). The pneumatic side is protected by a relief valve set at
120 psi. (8.3 bar). This port is a 1/4 NPT female connection.
Gas Supply Port
The clean, dry gas supply is connected to this port. The gas pressure should be 10%
above the full scale pressure of the controller. This port is a 1/8 NPT female connection.
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RUSKA 7350
Users Manual
2-6
Introduction
This portion of the manual discusses initial installation for the RUSKA 7350. Installing
the RUSKA 7350 is a relatively simple process of unpacking the RUSKA 7350,
powering it up, and then using the front panel to configure the system.
Unpacking the RUSKA 7350
Carefully unpack all components, checking for obvious signs of damage. In addition to
any nonstandard items ordered with the RUSKA 7350, the shipment should contain at
least the following items:
Chapter 3
Installation
• RUSKA 7350
• power cord, and this user’s manual
• grease gun and grease
If necessary, report any shipping damage to the freight agency. Remove masking tape,
strings, and packing materials from all components. If possible, save the packing
materials for future use.
Finally, install the Calibrator in a location that meets the requirements listed in Table 3-1.
Note
The RUSKA 7350 should not be subjected to mechanical shocks during
installation or use. It should be mounted on a rigid bench or in a sturdy
19 inch rack. Although the zeroing process will compensate for a slightly
unlevel mounting; the RUSKA 7350 should be mounted to within 5º of level.
Table 3-1. General Specification and Parameters
Parameter Value Model
Operating Humidity Range 5% to 95% RH all
Operating Temperature Range 5 °C to 50 °C all
Storage Humidity Range None1 all
Storage Temperature -20 °C to 70°C all
Power Requirements 100 – 120 VAC or 220 – 240 VAC all
Warm Up Period 30 minutes all
3-1
RUSKA 7350
Users Manual
Cautions
Powering Up the RUSKA 7350
W Caution
If there is any condensation, the RUSKA 7350 must be
thoroughly dried before power is applied.
The following cautions should be heeded at all times to insure safe operation of the
RUSKA 7350.
WX Warning
Never operate the unit with the cover removed. The power
supply has internal voltages near 400 volts.
Never apply more than 110% of the unit’s full scale pressure range to the test port. Never
try to control while a pressure source is connected to the test port.
Avoid thermal and mechanical shock to the instrument. This will affect performance and
require re-zeroing.
1. First, plug the power cord supplied with the RUSKA 7350 into the power connector
on the RUSKA 7350’s back panel.
Grounding for the RUSKA 7350 is provided through the power cord.
2. Next, plug the power cord into a receptacle rated for either 100 – 120 VAC
or 220 – 240 VAC (check name plate). If a different power cord is necessary for your
receptacle, consult Table 1-1 for available power cords.
3. Finally, turn on the RUSKA 7350 by flipping the POWER switch on the back panel.
The MEASURE screen will appear on the color display, and the front panel will be
fully operational.
Pneumatic Connections
Pneumatic connection to the RUSKA 7350 is straightforward. The following sections
discuss each port.
Drive Air Supply Port
The air supply port must be connected to a well regulated source of dry shop air.
Air supply should be 100 – 110 psi (7 – 7.5 bar). Supply port is a 1/4 NPT female
connection.
Test Port
The test port is designed to control a wide range of volumes. Any leaks on the test port
will cause measurement errors. For best results, a volume of approximately 3 in
is recommended. The test port is 1/8 NPT female.
Gas Supply Port
The gas supply port should be connected to a clean, dry gas supply with a pressure of
110% of full scale pressure. The port is 1/8 NPT female.
Note
3
(50 cc)
3-2
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