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HD2022 – Class 2 Sound Level Calibrator
Brand: Delta OHM S.R.L.
HD2022 sound level calibrator is a portable, battery operated sound source, suitable for sound level meters (portable and laboratory) and acoustic stations.
It allows calibrating 1/2” (1/4” with HD2020AD4 adapter) microphones with mechanical dimensions compliant with IEC 61094-1 and IEC 61094-4.
The generated sound pressure level is equal to 114 dB at 1000 Hz frequency. A LED signals the low battery condition.
Advantages:
- The 1000 Hz frequency allows calibrating sound level meters with any frequency weighting (LIN, A, B, …), without applying any correction factor.
- The generated sound pressure level is independent of atmospheric pressure: you don’t need to adjust the value according to static pressure over a wide range of values.
- The calibrator can be conveniently used both in laboratory and in the field. The 114 dB sound level allows performing calibrations even in high background noise environments.
- Its simplicity of use allows even unskilled staff to use it.
ISO 17025 calibration certificate according to IEC 60942 included.
Specifications
Brand
Coupling Cavity
- For standard 1/2” (12.7 ± 0.03 mm) microphones according to IEC 61094-1 and IEC 61094-4
Optional Adapter
- HD2020AD4 for 1/4” microphones
Frequency Tolerance
- 2 % in the range 0…+40° C and 10…90 %RH
Sound Pressure Level
- 114.0 dB ± 0.3 dB at 1 kHz (referred to 101.3 kPa, 23° C ± 3° C and 65 %RH)
Reference Conditions
- 23° C, 50 %RH, 101.3 kPa, microphone capsule with 10 mm³ equivalent volume
Stabilization Time
- 10 s
Total Distortion
- < 1 %
Temperature and Humidity Influence
- < 0.3 dB in the range 0…40° C and 10…90 %RH
Static Pressure Influence
- < 0.1 dB in the range 65…108 kPa
Short-Term Stability
- ± 0.05 dB
Stability After 1 Year with Normal Use
- ± 0.15 dB
Operating Conditions
- 0…+40° C / ≤ 90 %RH
Storage Temperature
- -25…+70° C
Microphone Equivalent Volume
- From 5 to 250 mm³
Power Supply
- 9 V alkaline battery IEC type 6LR61
- 9 V rechargeable batteries can also be used
Battery Autonomy
- 48 hours of continuous use with good quality alkaline batteries
Case Material
- ABS
Dimensions
- 53 x 43 x 83 mm
Weight
- 160 g
Protection Degree
- IP 64
Effects of Electromagnetic Fields
- < 0.3 dB
