Model Number
378B20
ICP MICROPHONE SYSTEM
Revision: A
ECN #: 42896
[7]
Performance
ENGLISH
SI
Nominal Microphone Diameter
1/2"
1/2"
Frequency Response Characteristic
Random Incidence
Random Incidence
Open Circuit Sensitivity
50 mV/Pa
50 mV/Pa
[3]
Open Circuit Sensitivity
(+/-1.5 dB)
-26 dB re 1 V/Pa
-26 dB re 1 V/Pa
[3]
Frequency Range(+/-1 dB)
7 to 6300 Hz
7 to 6300 Hz
Frequency Range
(+/-2 dB)
3.75 to 12,500 Hz
3.75 to 12,500 Hz
Lower Limiting Frequency
1.0 to 3.0 Hz
1.0 to 3.0
Inherent Noise(Linear)
<20 dB re 20 µPa
<20 dB re 20 µPa
Inherent Noise
<16.5 dB(A) re 20
µPa
<16.5 dB(A) re 20
µPa
Dynamic Range(3% Distortion Limit)
>135 dB re 20 µPa
>135 dB re 20 µPa
Dynamic Range
(Maximum without Clipping)
138 dB re 20 µPa
138 dB re 20 µPa
[2][4]
TEDS Compliant
Yes
Yes
[5]
Environmental
Temperature Range(Operating)
-40 to +176 °F
-40 to +80 °C
Temperature Coefficient of Sensi14 to +158°F (-10 to +70°C))
0.005 dB/°F
0.009 dB/°C
[2][3]
Static Pressure Coefficient
-0.01 dB/kPa
-0.01 dB/kPa
[2][3]
Humidity Coefficient of Sensitivity(0 to 100%, non-condensing)
± 0.001 dB/%RH
± 0.001 dB/%RH
[3]
Influence of Axial Vibration(0.1g (1 m/s²))
63 dB re 20 µPa
63 dB re 20 µPa
[2]
Electrical
Polarization Voltage
0 V
0 V
[1]
Excitation Voltage
20 to 30 VDC
20 to 30 VDC
Constant Current Excitation
2 to 20 mA
2 to 20 mA
Output Bias Voltage
10 to 14 VDC
10 to 14 VDC
Output Impedance
<50 Ohm
<50 Ohm
Maximum Output Voltage
+/-7 Vpk
+/-7 Vpk
Physical
Housing Material
Stainless Alloy
Stainless Alloy
Venting
Rear
Rear
[6]
Electrical Connector
BNC Jack
BNC Jack
Mounting Thread(Grid)
0.5 - 60 UNS
0.5 - 60 UNS
Size (Diameter x Height)(with grid)
0.52 in x 3.62 in
13.2 mm x 91.9
mm
Size (Diameter x Height)
(without grid)
0.50 in x 3.58 in
12.7 mm x 90.9
mm
Weight
1.63 oz
45.8 gm
[2]
All specifications are at room temperature unless otherwise specified.
In the interest of constant product improvement, we reserve the right to change specifications without notice.
OPTIONAL VERSIONS
Optional versions have identical specifications and accessories as listed for the standard model
except where noted below. More than one option may be used.
TLD
- TEDS Capable of Digital Memory and Communication Compliant with IEEE 1451.4
Optional Accessory : Model ACS-63 Calibration (with TEDS) of Precision Condenser
Microphones and Preamplifiers together (mated pair). (1) replaces Model ACS-42
NOTES:
[1] Prepolarized
[2] Typical.
[3] re 250 Hz
[4] Peak.
[5] TEDS Capable Digital Memory and Communication, compliant with IEEE P1451.4
[6] Venting through Preamp.
[7] See PCB Declaration of Conformance PS064 for details.
SUPPLIED ACCESSORIES:
Model ACS-42 Calibration of microphone with preamplifer (1)
Entered: AP
Engineer: MJN
Sales: MV
Approved: MT
Spec Number:
Date: 5/7/2014
Date: 5/7/2014
Date: 5/7/2014
Date: 5/7/2014
57826
3425 Walden Avenue, Depew, NY 14043
Phone: 716-684-0001
Fax: 716-684-0987
E-Mail: [email protected]
