Home Products Alat Kualitas Udara Kebisingan & Getaran Sound Calibrator HD2020 (DELTA OHM)
Sound Calibrator HD2020 (DELTA OHM)

Sound-Calibrator-HD2020The HD 2020 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 (“Measurement microphones. Part 1: Specifications for laboratory standard microphones”) and IEC 61094-4 (“Measurement microphones.


Part 4:  Specifications for working standard microphones”). The calibration pressure levels of 94dB and 114dB can be selected by the keypad. The 1000 Hz frequency cannot be changed.

The calibrator HD 2020 falls in the characteristics of class 1 according to IEC 60942-2003 and meets the requirements of the ANSI S1.40-1984.

Coupling cavity: for standard 1/2” microphones (12.7 ±0.03mm) according to IEC 61094-1 and IEC 61094-4
Frequency: 1000 Hz
Frequency tolerance: 1% in the range -10...+50°C and 10%...90%RH
Sound pressure level: 94.0 dB and 114.0 dB ±0.2 dB at 1 kHz (referred to 101.3 kPa, 23°C ±3°C and 65%R.H.)
Reference conditions: 20°C, 50% RH, 101.3kPa, 10 mm 3
cartridge volume
Stabilization time: 10s
Total distortion: <1%
Ambient condition influence
- Temperature and humidity influence: < 0.3 dB in the range ± 10°C...50°C and
- Static pressure influence: < 0.1 dB in the range 65 kPa ... 108 kPa
Stability levels
- Short-term stability: ±0.03 dB
- Stability after 1year,    normal use: ±0.1 dB
Operating conditions
- Working temperature: -10…+50°C
- Relative humidity: ≤90% R.H.
Storage temperature: -25…+70°C
Microphone equivalent volume: 5 to 250 mm3
Power supply: 9V alkaline battery IEC type 6LR61. 9V rechargeable batteries are also allowed.
9V battery autonomy: 48-hour continuous functioning with good quality alkaline batteries.
Automatic power off: 5 minutes – it cannot be disabled
Watch/date-indicator: internal with 3V lithium buffer battery
Case material: ABS
Dimensions: 53x43x83mm
Weight: 160g.
IP Protection degree IP64
Effects of electromagnetic fields: < 0.3 dB