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