HD2020 – Class 1 Sound Level Calibrator

Brand: Delta OHM S.R.L.
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HD2020 – Class 1 Sound Level Calibrator

Part Number: HD2020 Brand: Delta OHM S.R.L.

Class 1 sound level calibrator with ISO 17025 certificate included

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The HD2020 sound level calibrator is a portable, battery operated sound source, suitable for sound level meters (portable and laboratory) and acoustic stations.

It allows calibrating ½” microphones with mechanical dimensions compliant with IEC 61094-1 and IEC 61094-4.

The calibration pressure levels of 94dB and 114dB can be selected by the keypad. The 1000 Hz frequency cannot be changed.
Features
  • The 1000Hz frequency allows calibrating sound level meters with any weighting (LIN, A, B,…), without applying any correction factor.
  • The calibration 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 HD2020 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 the use even by unskilled personnel.
  • The presence of the LCD helps you through the steps of setting the calibrator, signal the end of the span and allows you to check the status of the battery.

Specifications

Brand

Coupling Cavity

  • For standard 1/2” microphones

Frequency

  • 1000 Hz

Frequency Tolerance

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

Sound Pressure Level

  • 94.0dB and 114.0dB ± 0.2 dB at 1 kHz

Reference Conditions

  • 20C, 50 % RH, 101.3kPa, 10 mm³ cartridge volume

Stabilization Time

  • 10 s

Total Distortion

  • < 1 %

Ambient Temperature and Humidity Influence

  • < 0.3 dB in the range -10° C..50° C and 10 %...90 %RH

Static Pressure Influence

  • < 0.1dB in the range 65kPa ... 108kPa

Short-Term Stability

  • ± 0.03dB

Stability After 1 Year with Normal Use

  • ± 0.1dB

Working Temperature

  • -10...+50° C

Relative Humidity

  • < 90 %RH

Storage Temperature

  • -25...+70° C

Microphone Equivalent Volume

  • 5 to 250 mm³

Power Supply

  • 9 V alkaline battery IEC type 6LR61. 9 V rechargeable batteries

9 V Battery Autonomy

  • 48 hour continuous function with good quality alkaline batteries

Automatic Power Off

  • 5 mins. cannot be disabled

Display

  • 3 1/2 LCD battery symbol

Watch/Date-Indicator

  • internal with 3 V lithium buffer battery

Case Material

  • ABS

Dimensions

  • 53X43X83 mm

Weight

  • 160 g

IP Protection Degree

  • IP64

Effects of Electromagnetic Fields

  • V0.3dB

Documentation

Datasheet

Manual

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