12 ThermoFlex Wide II Site Preparation Guide
Floor Vibration
If the customer site is close to heavy vehicle or rail traffic routes, or is near an
industrial site, the ThermoFlex device may be exposed to high levels of vibration
through the floor. The customer is responsible for hiring an independent contractor
to conduct floor vibration tests to determine the level of vibration. These tests will
show what shock acceleration will get transmitted to the ThermoFlex device during
imaging. The results of the vibration test must be sent to a Kodak representative for
further analysis.
Recommendations on how to check the vibration levels are shown below:
1. Hook up an accelerometer probe with a sensitivity of 1000 mV/g (such as the
Kistler® PiezoBEAM® accelerometer, Model 8628B5) to a signal analyzer.
2. Attach the probe to a metallic block that is approximately 50 mm
3
(2 in.
3
).
3. Place the block on the floor where the output device will be installed so that
vibration in the vertical direction can be measured.
4. Set the analyzer range to 0–200 Hz (x-axis) and 0–10 mg (y-axis).
5. Measure and record the floor vibration spectrum from 0–200 Hz when there
are maximum peaks of seismic activity at the site.
6. Repeat step 5 at least 5 times.
Test result guidelines:
• 0 to 2 milli-g’s acceleration (0-200 Hz)—no image artifacts expected.
• 2 to 10 milli-g’s acceleration (0-200 Hz)—requires analysis of specific
frequency peaks and amplitudes.
• Greater than 10 milli-g’s (0-200 Hz)—very high probability of image artifacts.
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