G.R.A.S. Sound & Vibration
Pistonphone Type 42AC - Page 15
4.
Specifications
Sound pressure level:
Nominal:
134 dB re. 20 µPa
Individually calibrated and valid for the following ambient reference conditions:-
Pressure:
1013 hPa
Temperature:
23 °C
Humidity:
50 % RH
Calibration accuracy:
Absolute:
1/2” mic.: ±0.14 dB at reference condition
1” mic.: ±0.2 dB at reference condition
When corrected for
1/2” mic.: ±0.14 dB
ambient pressure:
1” mic.: ±0.2 dB
Frequency:
250 Hz ±0.5 %
Distortion:
<1.5 %
Nominal effective coupler volume:
12530 mm
3
(including effective load volume of
microphone type 40AG or type 40EN)
Temperature range:
– 10 °C to +55 °C (batteries permitting)
Batteries:
Four standard LR6-AA alkaline cells
Dimensions:
Length:
175 mm (6.89 in)
Width:
35 mm (1.38 in)
Height:
35 mm (1.38 in)
Weight:
325 g (0.7 lbs)
Accessories included:
Adapter for ¼
"
microphones:
RA0049
Adapter for ⅛
"
microphones:
RA0069
Barometer:
ZC0003K
Coupler for ½
"
microphones
1
:
RA0048
Coupler for 1
"
microphones
2
:
RA0023
Four LR6-AA alkaline cells:
EL0001
1
Applies only for 42AC
2
Applies only for 42AC-S2
