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13
SPECIFICATIONS
The HD 2020 calibrator complies with
IEC 60942-2003 Class 1 and ANSI S1.40-1984
.
Coupling cavity:
for standard
1/2” microphones (12.7 ± 0.03 mm) ac-
cording 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 1kHz
(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 10%...90%RH
Static pressure influence:
< 0.1 dB in the range 65 kPa ... 108 kPa
Stability levels
Short-term stability:
±0.03 dB
Stability after 1 year, 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 mm
3
Power supply:
9V alkaline battery IEC type 6LR61. 9V rechargeable
batteries are also allowed.
9V battery autonomy:
48-hour continuous functioning with good quality alka-
line batteries.
Automatic power off:
5 minutes
– it cannot be disabled
Display
3½ digit LCD, battery symbol
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
