Acoustic Isolation Troubleshooting
A part on my enclosure seems to be defective.
- Contact us right away and we’ll arrange for a replacement. Please have the serial number for the enclosure and a description of the issue ready when you speak to our support team.
I’m having trouble getting the enclosure through a door.
- Most enclosures have detachable doors and other removable parts which can allow the system to pass through a door. Please contact Herzan to get details on this procedure.
I’m having trouble un-crating the enclosure.
- Refer to the un-crating procedure guide on the Manuals page. If that doesn’t answer your questions, contact Herzan.
The door on my enclosure doesn’t open and close properly.
- The gas springs, which assist in the door opening and closing, sometimes need to be replaced. Please contact Herzan to order replacement springs. If your enclosure is covered under warranty, there will be no charge for replacement springs.
- Please have the enclosure and gas spring serial number ready when contacting the Herzan support team.
The instrument is still experiencing acoustic noise.
- If acoustic noise is still causing issues after the acoustic enclosure has been installed, the most likely culprit is a poor seal on the enclosure. Check that the door is being closed and latched properly when taking measurements. Check that all cables are installed in the cable clamp correctly, ensuring there are no air gaps in the cable clamp. Also, ensure that the cable clamp is attached to the enclosure securely.
- Check that unused cable ports are sealed with a cable port cover. Make sure that no other ports, such as gas purge attachments or feedthroughs, are left open. If the enclosure has lifting handles, ensure that the attachment points have been filled with fill screws.
- If the enclosure is sealed properly and acoustic noise is still present, make sure that there are no extraordinary noise sources, such as voices, amplified sound, or traffic, present at the time of measurement.
- Lastly, make sure you are observing all Best Practices when using your acoustic enclosure.
The instrument is still experiencing high levels of noise.
- If you are still seeing noise levels but have ruled out acoustic noise by taking the steps above, there may be a different source of noise affecting your instrument or application. Check that the enclosure is not exposed to high levels of air movement. If the enclosure is exposed to air movement, move the enclosure out of the direct path of any air vents or wind. If this is not an option, employ air baffles to divert air movement.
- Vibrations are another source of noise that can limit an instrument or application. Cables entering the enclosure can transmit vibrations directly into the instrument, causing a direct disturbance to the instrument itself. Make sure all cables entering the system are slack (not taut) and if necessary, weighted. Make sure the cables are tightly clamped in the cable clamp to further disperse parasitic vibration. Also, make sure there are no noise-generating equipment, such as pumps or computer CPUs, resting on the enclosure or support frame. It is important to also check there are no extraordinary sources of vibration present, such as nearby construction or machines operating. If the above measures are not effective, you may need to employ a vibration isolation system or upgrading your current vibration isolation system.
- Other potential sources of noise include thermal fluctuation and electromagnetic interference. Consider these sources of noise as being detrimental to your measurements. If these noise sources are present, consider employing an EMI Shield or temperature stability feature.