The HD9101 and HD9102 sound level generator is a battery-fed portable sound
source, suitable for calibrating sound level meters (portable and laboratory
models) and acoustic measuring stations. It’s possible to calibrate directly 1”
microphones and, by means of a proper adapter (model 9101040), also 1/2”
microphones; the mechanical dimensions are in accordance with standards
IEC 61094-4 (“Measurement Microphones, Part 1: Specifi cations for Laboratory
Standard Microphones”) and IEC 61094-4 (“Measurement Microphones. Part 4:
Specifi cations for working Standard Microphones).
Features:
Diameter of microphones that may be calibrated:
23.77 ±0.05 mm 1”
12.7 ± 0.03 mm 1/2” (with 1/2” adapter mod. 9101040) standard according to
IEC 61094-1 and IEC 61094-4
Stabilization time: 60 sec
Frequency HD 9101: 1000Hz ± 2%
Frequency HD 9102: 1000Hz ± 4%
Sound pressure level HD 9101:
94db/114dB ± 0.3dB
Sound pressure level HD 9102:
94db/114dB ± 0.5dB
(ref.101.3kPa,23°C ±3°C and 65% RH)
Total distortion: <0.5%
Static pressure infl uence (Ref. to 101.3kPa):
±0.1 dB between 90 kPa 108kP
±0.3 dB between 65 kPa and 108kP
Temperature infl uence:
±0.05 dB between 5°C and 35°C
±0.2 dB between -10°C and 50°C
Relative humidity infl uence (ref. to 50%R.H.)
±0.1dB between 10% RH and 90% RH
Free from condensation
Stability (one year, standard use): ± 0.1 dB
Working temperature: -10°C ÷ +50°C
Storage temperature: -25°C ÷ +55°C
Relative humidity: _90% RH
Equivalent volume of the calibration room (+23°C):
10 cm3
Power supply: 9V alkaline battery IEC type 6F22
Battery life: about 15 hours with an alkaline battery