Body Leakage Test Stand – 2nd Generation

Product Summary

The Body Leakage Test Stand – 2nd Generation is an air flow measurement system that specifically for vehicle manufacturers that:

measures vehical cabin air leakage using an automotive mass air flow sensor

Key Features

Measures Air Mass Flow Range: 10 to 350 SCFM
Accurate Measurement (±3.0%)
Small footprint and minimal facility requirements
Highly Repeatable Results (±0.5 %)
Provide Pressure or Vacuum within the Vehicle Under Test

How does this test stand work?

This 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.

It 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 water at 4°C.
The optional test stand controller software includes the ability to set the flow at various rates and allow the operator to observe the percent difference between the flow nozzle and the flow meter reading.

It includes two flow nozzles that allows for automated system verification.

The test stand controller software includes a mode of operation to set the flow at various rates and allow the operator to observe the percent difference between the flow stand and theflow meter reading.

Depending on the percent difference, the software will display a “PASS” or “FAIL”.

Which Test Stand Should I Choose?

For information comparing the two available body leakage test stands, refer to the Body Leakage Test Stand Product Comparison.

Traceable to NIST

All Flow Systems air test stand sonic nozzles and instruments (P, T & RH) are traceable to National Institute of Standards and Technology (NIST).

System Specifications

The second generation of the Body Leakage Test Stand -2nd Generation comes in two models:

Model Code	Details
BLTS-2nd GEN (ENG)	Units: SCFM, inches of water at 4°C, inches Hg at 0°F, °F.
BLTS-2nd GEN (SI)	Units: SLPS, Pa, kPa, °C.

Both of the “ENG” and “SI” models mentioned above have the following features:

Specification	Value(s)
Flow Modes	Pressure, Suction, or Mass Flow
Flow Range	10 – 350 SCFM (4.7 to 165 SLPS)
Accuracy	Estimated to be better than ±3.0% of reading, NIST traceable
Repeatability	Estimated to be better than ±0.5%, defined as 2 standard deviations divided by the mean of 30 samples
Vehicle Pressure Range	0.25 – 1.0 inches of water at 4°C 127.5 to 250 Pa
Weather Station	Provides measurement of ambient conditions of pressure, temperature and humidity
Cycle Time	30 – 60 second, capacity dependent
Flow Hose	6″ diameter hose, 25 feet long
Pressure Line	1/4″ OD poly tube, 25 feet long
Audit Check Nozzles Flow Rates	Two audit check nozzles are included with flow rates of nominal 35 SCFM and 350 SCFM
Factory Acceptance Testing (FAT)	Setup and training at FLOW SYSTEMS factory for 1 day is included
Unit Dimensions	32″ W x 55″ H x 62″ D plus 20 feet of 6-inch diameter connecting hose

Built with Commercial Off-The-Shelf (COTS) Components

All Flow Systems air flow test system designs, the test system controller, data acquisition and control subsystems, and all instrumentation are standard and readily available Commercial Off-The-Shelf (COTS) items. This ensures that service or replacement of any item can be achieved in a timely manner, providing for high availability of our products. When applicable, this includes all of the Unit Under Test related instrumentation specified by the customer.

Software

The system controller software controls and records air flow to the vehicle cabin, then records the data to the specified data storage location.
Controller software is written using National Instruments LabVIEW™.

Report and Store Live Data

On-screen test results displayed in real-time in tabular or graphic modes
Allows the operator to read all system sensors, and read status and error messages
Tests can be run manually or on automatically (the system controls the test), with several user-specified parameters

Measure Cabin Body Leakage Using Two Types of Tests

Pressure: Air is pushed into the cabin of the vehicle
Suction: Air is vacuumed out of the cabin of the vehicle

Customize Controller Software and Integrate Data

Controller software can be customized to fit a wide variety of customer needs
Data can be integrated with customer’s local databases and/or information systems