Programming of the new BW-LPD-D4000 is so simple that any operator can be trained with ease.  Our new digital controller provides the flexibility to comply with the evolving MIL-S TDs or your in-house tests at  no additional cost.  The constantly digitally displayed frequency and acceleration may be set at any time by the user without reprogramming.

After mounting the device with either the ultrasonic couplant or tape dots supplied, simply depress the footswitch or Start button (or set the Auto Restart feature) and let the testing begin.  The Auto Restart feature allows the operator to program a delay between tests for device placement.  Throughput can exceed 200 parts per hour.  Production is enhanced and your product is protected by using the optional PIND station Test Bench with ESD work surface and operator grounding wrist strap.

Any signal derived from loose particles is transmitted by our patented Particle Sensor with built-in pre-amplifier.  The pre-amplification allows low impedance signal transmission which does away with interference caused by cable noise etc.  The assembly is acoustically isolated to suppress the reception of mechanical noise.

MORE FEATURES FOR........

........BETTER TEST RESULTS

The optional Transient Detector provides an independent sensor which detects environmental failure stimulus  (RFI/EMI) so that you can be assured that only devices with particles are rejected.  The detection of such stimuli is presented on the SPIKE indicator.

The BW-LPD-D4000 also provides two preset threshold levels, and operators can simply switch between them.  This feature allows for compliance with multiple MIL-STDs without recalibration.  These levels may be calibrated as required between 0-infinity.

Our patented PIND Shock Test Fixture produces true co-test shocks with or without stopping the vibration.  Select the shock application on the Controller front panel.  In the DYNAMIC position, the shock is applied simultaneously with the vibration.  The vibration stops for less than 250 milliseconds during the shock while in the STATIC position.

To measure the shock level, a Shock Capture and Display circuit is available as an option.  This circuit also permits the adjustment of the shock level using the shock accelerometer feedback.  This circuit has a high-speed peak detector to capture and store the less than 100 microsecond shock pulse.  The peak amplitude is then presented in Gs on the controller's SHOCK LEVEL display.  The resolution of this display is accurate within ± 8 Gs.

ENGINEERED FOR................

........PERFORMANCE AND RELIABILITY

As a standard feature B&W supplies a 50 force pound vibration shaker which can easily handle even your largest packages.

Sinusoidal vibration between 40 Hz and 250 Hz is standard and may be extended to 27 Hz at no additional cost (upon request).  You may also  frequency sweep through this range at any time during the test.  The linear oscillator is accurate at all G levels throughout the frequency range.  The magnitude and frequency are constantly presented on the digital displays.

The Degaussing Magnet reduces the magnetic field at the Device Under Test (DUT) location to less than 5 gauss to insure the detection of ferrous particles.

COMPONENT FAILURE DUE............

........... TO PARTICLE CONTAMINATION

Any noise bursts as detected by any one of the three detection systems is cause for the device to be rejected.  You may discover these defects visually as spikes on the oscilloscope, audibly as clicks or pops on the speaker, or by simply observing a lit threshold detector FAIL lamp.  Although the FAIL lamp acts as the prime failure indicator, the other indicators provide useful evidence in failure analysis.

To assist in your evaluation of devices, we recommend that you retain two samples of each device type as "check units."  One of these devices should be known to be free of particles; the other seeded with particles of the type expected to be most prevalent in that package and of minimum size.  You will use these two samples to evaluate the mounting means, confirm the vibration frequency to be used, and to identify any noises generated by other than loose particles.  The device should be visually inspected for cleanliness immediately prior to performing the PIND test.

Devices that are particularly prone to particle contamination can be decontaminated by a PIND test immediately prior to final seal.  The product manufacturer can apply this type of test in all production processes to help determine weld schedules, sealing techniques, cleaning processes, and other means of controlling contamination.

COMMITMENT TO SERVICE..................

...................AND PRICE ADVANTAGE

Each of our systems comes with a full one year warranty, Calibration Certification in accordance with MIL-STD-45662A and meets or exceeds all the requirements of MIL-STD-883, 750, and 202 for PIND.  The Maintenance Manual contains all calibration procedures and outlines the instruments required.  A well-equipped calibration lab will have adequate instruments for most procedures.  B&W Engineering provides complete system calibration including preventative maintenance and is completed typically within 5 days from receipt. Transducers are completed within 3 days.

.............OPERATOR CONSIDERATIONS

The operator is required to monitor both the audio and visual displays.  A fair degree of dexterity is also required to ensure proper placement of the DUT on the mounting surface.  The operator's comfort should be considered when setting up the PIND station, particularly when the test is to be run on large lots or for extended periods of time.