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Unit Dimensions: 32" W
x 55" H x 62" D
Plus 20
feet of 6-inch diameter connecting hose.
Side View
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Home
Body Leakage Test Stand
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2nd Generation
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DESCRIPTION
An Automobile Manufacturer required a portable tester to
measure the airflow leakage through a vehicle cabin in
order to improve quality and reduce warranty expenses on
wind, road and power train noise complaints.
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SYSTEM REQUIREMENTS
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Provide Pressure,
Suction
or Mass Flow Control
within the Vehicle Under
Test.
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Measure Air
Mass
Flow
Range:
10 to 350 SCFM.
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Microsoft Excel™ Spreadsheet for Data
Corrections and Data Storage.
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User-friendly Test
System Controller Software.
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Highly Reproducible Results.
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Two (2) System Check Nozzles.
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Data Output Corrected to Nominal Day Conditions.
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Custom Quick-Disconnect Fittings for Air Flow Hose,
Filter and Check
Nozzles.
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Optional Software for Data Logging, Corrections
and Storage.
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SOLUTION
Flow
Systems
designed and manufactured an Air Flow
Metering System that employs a Thermal Mass
Flowmeter.
The
Test Stand controls the pressure inside the
vehicle as it undergoes leakage testing, and
the pressure inside the vehicle body may be
positive or negative with respect to the
local barometric reading. The BLTS-2nd
Gen is designed to deliver 10 to 350 SCFM of
air at an accuracy of +/-3.0% of reading or
better, with the maximum static pressure at
the vehicle being +/-1.0 inches H2O@4°C.
The Test Stand will allow the operator to
change the flow
direction.
Indicators
on the Operator Interface Panel display when
the system is in either Pressure or Suction
Mode.
The
Test Stand includes (2) Check Nozzles that
allow for automated system verification.
The optional test stand controller software
includes the ability to set the flow at
various rates and allows the operator to
observe the percent difference between the
check nozzle and the flow meter reading.
The unit is easily positioned via push
handles and (4) four lockable swivel
casters.
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Rear
View with hose and filter
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MICROSOFT EXCEL™ SPREADSHEET
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FUNCTIONS
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Correction of Flow Test Data Based on Ambient
Conditions, Test
Pressure, Flow Mode
and Nominal Day Conditions.
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Data Record Organization with Comments.
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Check Nozzle Data Analysis.
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Data Storage.
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OPTIONAL
LABVIEW™ SOFTWARE FOR AUTOMATED DATA REDUCTION
AND LOGGING: BLTS-DATASOFT
FUNCTIONS
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Improved Vehicle Pressure Set-Point
Adjustment.
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Button for Data Logging.
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Indication of flow and Vehicle Pressure
Stability.
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Correction of Flow Test Data based on
Ambient Conditions, Test
Pressure, Flow Mode
and Nominal Day Conditions.
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Data Record Organization with Comments.
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Check Nozzle Data Analysis.
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Data Storage.
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On-the-fly change between SI and English
Units. |
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SYSTEM SCHEMATIC
The following illustration shows the
Pneumatic and Instrumentation Diagram (P&ID) of
the test system:
Click
to view enlarged image
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USER INTERFACE
This photo shows the operator
interface of the test system:
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SYSTEM LAYOUT
The
following diagram illustrates the physical layout of
the test system:
Click
to view enlarged image
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SPECIFICATIONS
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Flow
Modes:
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Pressure,
Suction, or Mass Flow.
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| Flow
Range: |
10
to 350 SCFM. (283 to 9,911 SLPM)
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| Accuracy:
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Estimated
to be better than +/- 3 % of reading, with
traceability to NIST standards.
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| Repeatability:
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Estimated
to be better than +/-0.5 % as defined as 2
standard deviations divided by the mean of 30 identical samples. |
| Vehicle
Pressure Range: |
0.25
to 1.0 inches H2O @ 4°C (13 to 25 mm H2O @
4°C). |
| Accuracy:
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+/-0.8%
to +/-0.2% of reading, with traceability to
NIST standards.
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| Weather
Station: |
Provides
measurement of ambient conditions of
pressure, temperature and humidity. |
Microsoft
Excel
Spreadsheet for: |
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Storage of test records and user comments.
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Correction
of raw test data to Nominal Day Conditions
based on Ambient Conditions.
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Analysis
of Check Nozzle test data. |
| Cycle
Time: |
30
to 60 seconds depending on percent of
maximum capacity. |
Connecting
Hardware from
Test Stand to Vehicle: |
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Air Flow: 6-inch diameter hose, 20
feet
long.
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Pressure Line: 1/4-inch OD poly tube, 20
feet long. |
| Audit
Check Nozzles: |
Two
(2) audit check nozzles are included with
flow rates of nominal 35 SCFM and 236 SCFM. |
| Factory
Acceptance Testing (FAT): |
Setup and training at FLOW
SYSTEMS factory for 1 day is
included. |
| Crate:
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Reusable
with Fold-Down Ramp for local
transport. Constructed from Heat-Treated wood. |
MODELS
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BLTS-2nd
GEN (ENG):
Units: SCFM, In H2O @ 4°C, In Hg@0°C, °F.
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BLTS-2nd GEN
(SI):
Units: SLPM, mm H2O @ 4°C, mm Hg@0°C, °C.
OPTIONS
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BLTS-DATASOFT.
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Software Customization including database
integration, networking, SPC (Statistical Process
Control), and more.
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On-site Installation, Training, Commissioning and
Upgrades.
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