System Selector

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Follow this simple three-step procedure to select the proper Labworks vibration system for your application.

1. Determine the payload weight.

Add the weight of the test article to any adaptor or fixture that may be required to fasten it to the shakers armature head. Additional holes cannot be drilled in the armature head, therefore an adaptor may be required and its weight must be included in the payload weight. Be sure to include the weight of any other components that will move with the test vibration such as cables, connectors, hold down bolts, etc.

2. Determine the required vibration acceleration.

Convert your vibration specification data into acceleration units of g’s peak for sine testing or g’s rms for random testing. Remember: 1 g = 32.2 ft/sec² = 9.8 m/sec². Determine the maximum displacement and acceleration that will be required for the desired testing. If either of these is not known, it can be determined by referring to the engineering information section of this catalog.

3. Select a Labworks system using either the Sine or Random Vibration Capabilities charts below.

Plot the point that corresponds to your payload weight and required acceleration. Your testing can be done with any system whose capability line passes to the right and above your plotted requirements point. Refer to the System Components/Specifications table below to insure that the system you have selected has adequate peak-to-peak displacement and frequency range capability. Refer to the engineering section of this site for additional detailed information

Have a question or need some help? Fill out the selection form or call us and talk to a vibration engineer for special applications or just to insure your selection.

Sine Vibration Capabilities
(click here on the chart for a .pdf download of this chart)

Random Vibration Capabilities
(click here or on the chart for a .pdf download of this chart)

System Components/Specifications

Sine force = pounds force, vector (peak)

Random force = pounds force, RMS, 2.5s min.

Disp. pk-pk = Maximum relative displacement between stops, peak to peak, inches

Arm. weight = Shaker armature weight, pounds

Freq. limit = DC to upper frequency limit, Hz, derate approximately 10% for heavy loads. Systems may be usable above this limit at reduced force levels.

Flex. stiff. = Shaker flexure stiffness, lb/inch

Shaker cooling = Y = Cooling vacuum supplied

System
Number Shaker
Model Amplifier
Model Sine
Force
(lb pk) Random
Force
(lb rms) Disp.
Pk-Pk
(inch) Arm.
Weight
(lbs) Freq.
Limit
(Hz) Flex.
Stiff
(lb/in) Shaker
Cooling

LW-132-203-4.5 ET-132-203 PA-119-2M 4.5 3.0 .20 .07 11 K 15
N

LW-132-4.5 ET-132-2 PA-119-2M 4.5 1.4 .50 .10 9.0 K 15
N

LW-132-7 ET-132-2 PA-138 7.0 5.0 .50 .10 9.0 K 15
N

LW-126-13 ET-126B-1 PA-138 13 5.0 .75 .20 8.5 K 15
N

LW-126-25 ET-126B-4 PA-141 25 11 .75 .20 8.5 K 15
Y

LW-139-40 ET-139 PA-138 41 17 1.0 1.0 6.5 K 60
N

LW-139-75 ET-139 PA-141 75 28 1.0 1.0 6.5 K 60
Y

LW-140-110 ET-140 PA-141/140 110 45 1.0 1.0 6.5 K 90
Y

LW-127-225 ET-127 PA-141/127 225 110 1.15 5.0 4.5 K 250
Y

LW-127-500 ET-127 PA-123/500 500 350 1.15 5.0 4.5 K 250
Y

LW-127-500D12 ET-127 PA-123/500 500 350 1.15 19.0 2.5 K 250
Y