The Class 1 sound level calibrator is a professional instrument designed for the verification and calibration of portable sound level meters, laboratory sound level meters and acoustic measurement stations. In this configuration, it provides a practical solution for checking the correct response of the microphone-preamplifier chain before and after a measurement campaign, both in the laboratory and directly in the field.
This Class 1 sound level generator is compliant with IEC 60942:2003 and is suitable for use with standard 1/2” and 1/4” microphones. For 1/2” microphones with mechanical dimensions compliant with IEC 61094-1 and IEC 61094-4, the calibrator provides accurate, stable and immediate sound level meter calibration, with fixed frequency at 1000 Hz and selectable sound pressure levels of 94 dB and 114 dB.
One of the main advantages of the HD2020 sound level calibrator is precisely the 1000 Hz frequency, which allows sound level meter calibration with any weighting (LIN, A, B, …) without introducing correction factors. This simplifies day-to-day operation and reduces the risk of errors during metrological verification activities.
Another important aspect is that the generated sound level is independent from atmospheric pressure, eliminating the need for static pressure correction over a wide operating range. This makes the calibrator particularly reliable both in laboratory environments and under variable field operating conditions.
The 114 dB level makes this sound level calibrator for sound level meters especially useful even in environments with high background noise, such as industrial areas, workshops or production departments. Under these conditions, correct calibration can still be performed without significant interference.
From an application standpoint, the HD2020 can be used both for laboratory calibrations and for quick field verification, making it an essential instrument for quality control procedures and noise measurement activities.
Ease of use is another practical advantage. The LCD display allows the user to view the generated sound pressure level, battery status, date and time. It also signals anomalies such as microphone absence or incorrect microphone insertion inside the calibrator cavity, helping the operator avoid calibration errors.
It is possible to set the calibration validity interval: once expired, the calibrator indicates that a new verification is required, improving operational management and long-term traceability.
From an operational perspective, the calibrator is portable and battery powered, with an automatic power-off system that preserves battery life when the cavity is open and in case of prolonged inactivity. This makes it particularly practical for everyday professional use.
The ACCREDIA calibration certificate completes the package and makes this professional sound level calibrator an ideal solution for users requiring reliable results, metrological traceability and compliance with the standards required for acoustic verification activities.
Applications
- Calibration of portable sound level meters
- Verification of laboratory sound level meters
- Control of acoustic measurement stations
- Calibration before and after measurement campaigns
- Laboratory and field use
- Verification in high background noise environments
- Support for quality control procedures
FAQ – Class 1 sound level calibrator
What is a Class 1 sound level calibrator?
It is a reference sound source used for the calibration of sound level meters and acoustic measurement systems with high accuracy.
What is the HD2020 sound level calibrator used for?
It is used to verify the correct operation of sound level meters and microphones before and after measurements, ensuring reliable data.
What sound levels does the calibrator generate?
It generates 94 dB and 114 dB levels with fixed frequency at 1000 Hz.
Why is the 1000 Hz frequency important in sound level meter calibration?
It allows calibration with any weighting without applying correction factors.
Can the sound level calibrator be used in the field?
Yes, it is designed for both laboratory and field use.
Why is the 114 dB level useful?
It allows correct calibration even in environments with high ambient noise.
Does the calibrator indicate operating errors?
Yes, it signals microphone absence or incorrect microphone positioning.
Is the sound level calibrator supplied with calibration?
Yes, it is supplied with ACCREDIA calibration certificate.
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