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HD2024C – Class 1 Sound Level Calibrator

Brand: Delta OHM S.R.L.
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Does not ship to Ohio, United States

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The HD2024 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 94 dB at 1000 Hz frequency. A LED signals the low battery condition.

Advantages of the HD2024 calibrator:
  • 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.
  • Its simplicity of use allows even unskilled staff to use it.
It includes ISO17025 Calibration Certificate.

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

  • 1000 Hz

Frequency Tolerance

  • 1 % in the range -10 ÷ +50° C and 10 ÷ 90 %RH

Sound Pressure Level

  • 94.0 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

  • -10 ÷ +50° 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

Documentation

Manual

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