Tough luck. Just kidding! Please contact us and we’ll arrange for a replacement. Please have the serial number for the enclosure and a description of the issue ready when you contact us.

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.

Refer to the un-crating procedure on the Manuals page. If that doesn’t answer your questions, contact Herzan.

The gas springs which assist in the door opening and closing sometimes need to be replaced. Please contact Herzan to order replacement springs. Please have the enclosure or gas spring serial number ready when you contact us.

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 the cables are installed in the cable clamp correctly, ensuring there are no air gaps in the cable clamp. 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.  Make sure you are observing all Best Practices.

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 at work. Check that the enclosure is not being exposed to high levels of air movement. Move the enclosure out of the direct path of any air vents or wind. It may be necessary to employ air baffles to divert air movement.

Vibration is another potential source of noise. Cables can transmit vibrations directly into the enclosure. Make sure that the cables entering the system are slack (not taut) and, if necessary, weighted. Make sure that the cables are tightly clamped in the cable clamp to further disperse parasitic vibration. Make sure that no noise-generating equipment, such as pumps or computer CPUs, are resting on the enclosure or support frame. Check that 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. If these noise sources are present, consider employing an EMI Shield or temperature stability feature.