G.R.A.S. Type 40HT User Manual

G.R.A.S. Sound & Vibration
Single-channel Low-noise Measuring System consisting of: Type 40HT and Type 12HF - Page 13
4. Specications
4.1 ½-inch Low-noise Microphone System Type 40HT
Low-noise Microphone System Type 40HT comprising:
½-inchMicrophone: Type40AH
Preamplier:  Type26HH(with3mcableandLEMOFGA.1B.307plug)
Frequency response:
12.5 Hz - 10 kHz ±1.0 dB
10Hz-16kHz:  ±2.0dB
6Hz-20kHz:  +2.0dB,–3.0dB
Nominal sensitivity:
System:   800mV/Pa±2dB
Microphone polarization voltage:
200 V
Dynamic range:
Upperlimit:  113dBre.20µPa
Lowerlimit:  6.5dBAre.20µPa(inherentnoise)
Microphone capacitance:
20 pF
4.2 Single-channel Power module Type 12HF (separate order)
Input channel:
7-pinLEMOEGA1Bconnector
Outputs channel:
BNC socket
Output impedance:
30Ω
Polarization voltage:
200 V
Power supply:
internal:  6Vfrom4xLR14(C)standardalkalinecells
external:  6V-20VDCviaincludedMainsAdapterAB0010
Dimensions:
height:  132.6mm(5¼in)
width:  34.6mm(1.3in)
depth:  196.0mm(7.7in)

G.R.A.S. Type 40HT Specifications

General

Brand	G.R.A.S.
Model	Type 40HT
Category	Measuring Instruments
Language	English