Typical applications and use
- Automotive industry
- Wind-induced noise measurement on vehicles
- Outdoor measurements on testing grounds
- Wind-tunnel testing
It has an integrated CCP1 preamplifier and is delivered with a built-in TEDS2 chip, which enables it to be programmed as a complete unit.
The 40LS requires a constant-current power supply, such as the G.R.A.S. 12AL CCP Supply, or any other CCP compatible power supply.
Close manufacturing tolerances together with the advantages of the TEDS chip, provide the 40LS with a high degree of interchangeability; a major advantage which excludes accounting for individual characteristics.
The 40LS is both very stable and robust. It has an integrated 1.5 m co-axial cable with a microdot connector and is delivered with a supple detachable silicon-rubber fairing.
Because of its lightness, the microphone with fairing can readily be mounted on surfaces using double-sided adhesive tape.
All G.R.A.S. microphones are individually checked and calibrated before leaving the factory.
An individual calibration chart is supplied with each microphone.
|Frequency range (±1 dB)||Hz||TBD|
|Frequency range (±2 dB)||Hz||TBD|
|Frequency range (±3 dB)||Hz||TBD|
|Dynamic range lower limit (microphone thermal noise)||dB(A)||TBD|
|Dynamic range lower limit with G.R.A.S. preamplifier||dB(A)||TBD|
|Dynamic range upper limit||dB||TBD|
|Dynamic range upper limit with G.R.A.S. preamplifier @ +28 V / ±14 V power supply||dB||TBD|
|Dynamic range upper limit with G.R.A.S. preamplifier @ +120 V / ±60 V power supply||dB||TBD|
|Dynamic range upper limit with G.R.A.S. CCP preamplifier||dB||TBD|
|Open-circuit sensitivity @ 250 Hz (±2 dB)||mV/Pa||TBD|
|Open-circuit sensitivity @ 250 Hz (±2 dB)||dB re 1V/Pa||TBD|
|IEC 61094 designation||TBD|
|Temperature range, operation||°C / °F||TBD / TBD|
|Temperature range, storage||°C / °F||TBD / TBD|
|Temperature coefficient @250 Hz||dB/°C / dB/°F||TBD / TBD|
|Static pressure coefficient @250 Hz||dB/kPa||TBD|
|Humidity range non condensing||% RH||TBD|
|Humidity coefficient @250 Hz||dB/% RH||TBD|
|Influence of magnetic field @80 A/m, 50 Hz||dB re 20 µPa||TBD|
|Influence of axial vibration @1 m/s²||dB re 20 µPa||TBD|
|Connector type||3 m 7-pin LEMO Cable|
|CE/RoHS compliant/WEEE registered||No/No|
|Weight||g / oz||/ TBD|
|G.R.A.S. GR0933||Adhesive tape, pre-cut, single-sided|
|G.R.A.S. GR0934||Adhesive tape, pre-cut, double-sided|
|G.R.A.S. MI0031||Cleaning tissue|
|G.R.A.S. AE0046||Adapter, BNC male to microdotfemale|
|G.R.A.S. GR1252||Silicon-rubber fairing|
|G.R.A.S. 12AQ||Power Module (2-ch.)|
|G.R.A.S. RA0202||Calibration Adapter (required)|
|G.R.A.S. 42AP||Intelligent Pistonphone with built-inprecision barometer (250 Hz or 251.2 Hz,114 dB ±0.05 dB) (recommended)
|G.R.A.S. 42AA||Pistonphone (250 Hz, 114 dB ±0.08 dB)|
|G.R.A.S. GR1297||Stainless-steel fairing