Description
Casella CEL-633 Sound Level Meter Repair
The Casella CEL-633 Sound Level Meter is a sound level meter – the microphone is the instrument. Everything downstream is interpretation, and a microphone that has drifted or been damaged produces measurements that are wrong in a way no amount of processing recovers.
Certified technicians at June Company service the Casella CEL-633 Sound Level Meter for occupational hygienists, environmental consultants, acoustic engineers, and safety departments. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Casella CEL-633 Sound Level Meter problems we fix
- Frequency weighting network errors – A and C weighting curves drifting out of specification.
- Octave band filter faults.
- Will not accept calibration at reference level.
- Readings drifted out of tolerance – corrected and verified against reference standards.
- Display, keypad or front-panel faults.
- Battery or storage faults.
- Microphone damaged or drifted – verified against an acoustic calibrator, since the microphone carries the accuracy of every reading.
- Preamplifier faults or excessive noise floor.
FAQs
Do you service instruments past manufacturer support? Yes. Much of what we repair is out of support, which is exactly where component-level work earns its keep.
What if it is not economical to repair? We tell you in the quote. The evaluation is free and there is no obligation to proceed.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.







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