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VACUUM SYSTEM
| SYSTEM CONTROLLER SOFTWARE |
Data
Management Functions include:
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Test Configuration
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Test Sequencing
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Status & Error Message Management
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Results Storage
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Data Reporting
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Data Analysis
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Historical Analysis
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The System Controller provides
Automated Control of the Hardware. Functions include:
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Flow Measurement
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Flow Control
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Pressure Regulation
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System Diagnostics
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Transducer Calibration
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The system is configured to accept the following inputs from the UUT. The scaling for the signal is selected by the operator. A differential pressure transducer or signal conditioning for the input signal are also available options.
| Frequency |
1 Channel |
10 to 5000 Hz |
+/- 1 Microsecond |
| Current |
1 Channel |
4 to 20ma dc |
+/-0.015% of Reading |
| Voltage |
1 Channel |
0 to 10v dc |
+/-0.06% of Reading |
Outputs:
| Current |
1 Channel |
4 to 20ma dc |
+/-0.015% of Reading |
| Voltage |
1 Channel |
0 to 10v dc |
+/-0.06% of Reading |
These channels in addition to all pressure, temperature, and flow measurements are calibrated against NIST traceable standards.
page 4 of 15
Shown below is a picture of the System Standard Production Screen:
Control System Operator Interface
As with all FLOW SYSTEMS Test Systems, the System Controller was developed using National Instruments™ LabVIEW™. Many of the user interface features of this system were jointly developed under a licensing agreement between FLOW SYSTEMS and CompuFlow Solutions in the creation of a custom version of CompuFlow's Cflow+® software.
Also standard on all Test Systems manufactured by FLOW SYSTEMS is our Remote Internet Diagnostic and Support software. This feature enables FLOW SYSTEMS to provide our customers
with rapid solutions for technical support on a global basis. The client is required to provide a temporary, high speed Internet connection.
page 5 of 15
Software Features
Calibration Setup
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Allows the user to build a meter test plan.
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Validates all test points based on current system configuration.
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Instructs operator on test section location.
Control Types
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Mass Flow Rate
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Actual Volumetric Flow Rate
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Standard Volumetric Flow Rate
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Throat Reynolds Number
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Pipe Reynolds Number
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Differential Pressure Range
User Configurable Acceptance Criteria
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Sample Acceptance
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Last Match
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All Data
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Average Match
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All within limits
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Averaging Length
User Configurable Repeats
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User Selectable Units and Precision for all fields.
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User Configurable Report Generation.
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Analysis including multiple plots and previous calibration comparisons.
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Real Time Diagnostics.
Internet Support and Diagnostics
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Allows FLOW SYSTEMS to observe and / or control a system remotely for training, optimization, or troubleshooting purposes. Requires a temporary, high-speed data line.
Pressure, Temperature, Frequency, Voltage and Current Calibration
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Designed for automated on-bench calibration.
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Common calibration port for pressure calibration.
System Accuracy Check
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Measures the repeatability, mass flow and percent difference of a calibrated master Sonic Nozzle against one or more installed system Sonic Nozzles.
System Diagnostics
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Leak Testing - pressure decay method.
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Maintenance - allows the user to manipulate all system controls and read all sensors.
page
6 of 15
Accuracy
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Mass Flow:
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+/-0.39% of Reading - Standard
+/-0.30% of Reading - Optional
+/-0.17% of Reading - Optional
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Volume Flow through UUT:
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+/-0.42% of Reading - Standard
+/-0.34% of Reading - Optional
+/-0.20% of Reading - Optional
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Pressure:
(Barometric to 100
psig) |
+/-0.12% of Reading - Standard
+/-0.07% of Reading - Optional
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Temperature:
(10° to
32°C) 1000Ω,
Thermister |
+/-0.03% of Reading
+/-0.1°C |
Currrent:
(4 to 20 ma dc) |
+/-0.015% of Reading
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Voltage:
(0 to 10vdc) |
+/-0.06% of Reading
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Frequency:
(10 to 5000Hz) |
+/-1 Microsecond
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Repeatability:
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< +/-0.25% as defined as 2 standard deviations
divided by the mean of 20 identical samples using a
Sonic Nozzle.
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Cycle Time:
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90 to 120 seconds depending on flow rate.
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A technical note is available
that contains a more thorough discussion
of gas flow measurement accuracy using Sonic
Nozzles.
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page 7 of 15
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Facility Requirements* |
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Electrical Power
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100 - 240 VAC / 50 - 60Hz / 1pH / 7.5 -
15
Amp
(Option: 220VAC / 50Hz / 3pH)
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Pressure Range
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70 to 150 psig
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Temperature Range
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60° to 90°F
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Particulates
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Less than 5 microns
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Oil Content
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Less than 10 ppm
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Pressure Dew Point (Air only)
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Less than 39°F
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Flow Rate: Equal to the lesser of the maximum capacity of the flow bench or the requirement of the largest part for a 100% duty cycle. An air receiver will allow for maximum flow at less than 100% duty cycle. Contact FLOW SYSTEMS for more information.
*The Above Facility Requirements are to be Supplied by the Customer at the Installation Site.
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Specifications
A Scalable pressurized system that can be configured with 6, 9, 12 or
13 Sonic Nozzles for a range of 8,192:1 for upstream (elevated pressure) testing or
24,576:1 for downstream (atmospheric pressure) testing with most common calibration gasses.
Vacuum system with 11 Sonic Nozzles will provide a 2088:1 range for testing meters at atmospheric conditions using ambient air.
page 8 of 15
To
Convert to other Units, click here for Conversion
Chart
page 9
of 15
Estimated Performance of
FLOW SYSTEMS' Gas Flow Calibrator
Low Flow Manifold
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Assumptions:
Gas Temp. = 70F, Barometric Pressure = 14.696psia
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UUT
at Atmospheric Conditions
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Air
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Air
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Air
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Air
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Air
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Air
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UUT
Press.
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14.696
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psia
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Actual Barometric Pressure will vary with
elevation and seasonal changes
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0
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psig
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Sonic
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Throat
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Inlet
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Mass
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Mass
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Mass
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Mass
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Actual Volume Flow
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Nozzle
#
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Diameter
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Pressure
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Flow
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Flow
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Flow
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Flow
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Qdot
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Qdot
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inches
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psia
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lbm/sec
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SCFM*
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SLPM**
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g/sec
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ACFM
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ALPM
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12
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0.2500
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100.000
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0.11279
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90.33
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2374
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51.16
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90.34
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2558
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11
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0.1768
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100.000
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0.05637
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45.15
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1187
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25.57
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45.15
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1279
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10
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0.1250
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100.000
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0.02817
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22.56
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593
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12.78
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22.57
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639
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9
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0.0884
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100.000
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0.01408
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11.28
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296
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6.39
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11.28
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319
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8
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0.0625
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100.000
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0.00703
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5.63
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148
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3.19
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5.63
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160
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7
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0.0442
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100.000
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0.00351
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2.81
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74
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1.59
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2.81
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80
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6
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0.0313
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100.000
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0.00175
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1.40
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