Norsonic - Model Nor145 -Sound Level Meter

• Environmental noise assessements
• Building Acoustic
• Room acoustics - STIPA
• Noise monitoring
• Product noise testing
• Vibration measurements
• Noise in the workplace
• Infrasound
• Ultrasound

The Nor145 Precision Sound and Vibration Analyser is supplied with ½” preamplifier Nor1209 and the ½” measurement microphone Nor1227. It conforms to the latest revision of the following National and International standard including amendments, all type 1 / class 1; IEC 61672, IEC 61260, DIN 45657, ANSI S1.4, ANSIS1.11, and ANSI S1.43. It also conforms to the obslote sound level meter standards IEC 60651 and IEC 60804.

• Easy connectivity via built in WLAN and 3G/4G LTE modem.
• Large colour touchscreen
• Intuitive user interface and custom-made user setups.
• Easy to use.

• Class 1 Precision sound level meter and frequency analyser
• Easy connectivity via built in WI-FI and 3G/4G. LTE modem.
• Large colour touchscreen (4.3”).
• Real push keys for quick operation in challenging environments.
• Intuitive user interface with graphical icons for selection of measurement mode and custom-made user setups.
• Voice, text notes and built-in GPS for documentation of the measurements.
• Wide frequency range (0,4 Hz – 40 kHz in 1/3 octave band and FFT).
• Parallel 1/3 octaves and FFT analysis.
• 120 dB measurement range.

The Nor145 Analyser is designed to be expanded and upgradeable to give you a complete measurement tool for years to come. Norsonic’s retrofit policy ensures regular software updates with new features and new options. followed by a 3 years warranty.

Nor145 basic unit

includes A, C and Z weighting networks, 1/1 & 1/3 octave filters with measurement of Leq, LeqI, LE – sound exposure level, SPL, Lmax, Lmin with parallel detection of Fast, Slow and Impulse time constants, statistical calculation of Ln, and TMAX5. The measurement data is analysed as global values in addition to two parallel time profiles with an adjustable resolution ranging from 5 ms to 24 h and one moving time profile. Reverberation time in 1/1 octave bands based on impulse excitation. Advanced trigger facilities. Voice and text annotation.

Accessories included:

• 32 GB Micro SD card (larger cards, e.g. 256 GB can be used)
• Wind screen Nor1451
• USB cable
• Mains adapter Nor345B
• Carrying case Nor1346
• Manual
• Reporting software NorConnect
• Control software NorVirtual

Microphone and preamplifier must be ordered separately. Choose between several alternatives. Standard alternative is Nor1209 preamplifier and Nor1239, ½” free field microphone.

Nor145 conforms to the latest revision of the following National and International standard including amendments, all type 1 / class 1; IEC 61672, IEC 61260, DIN 45657, ANSI S1.4, ANSIS1.11, and ANSI S1.43. It also conforms to the obsolete sound level meter standards IEC 60651 and IEC 60804.

Measured Parameters

Simultaneous measurement of SPL, Leq, LeqI, LMax, LMin, LE, LEI, LPeak, Ln and Tmax5.
Time weighting functions: Fast, Slow and Impulse (Simultaneous).
Spectral weighting functions: A, C and Z – weighting (Simultaneous).
Frequency analysis: 1/1 and 1/3 octave real time filters from 0,4 Hz to 20 kHz.
Statistical calculations: 8 individual adjustable percentiles from L0,1% to L99,9%, The statistical calculations are performed in real time within each frequency band and for each profile period if period length is set longer than 2 minutes. Class width is 0,2 dB. Dynamic range is 130dB.

Measurement control

Overall measurement duration: 1 sec – 7 days. (If set to Repeat or Synchro mode a new measurement will be started automatically, with no time gap between each measurement).
Time profile A resolution: 5 ms – 24 hours including full frequency spectra. From 1 sec if profile B or Moving is enabled.
Time profile B and Moving resolution: 1 s – 24 hours. A, C and Z – no frequency spectra.
Back erase in Pause mode: 0-20 sec free delectable graphical back erase.

Audio recording

12 and 48 kHz sampling rate / 8 , 16 and 24 bits / 0-120 sec pre-trigger.

Measurement range

One range covering 120dB without any range adjustments.
Self noise measured with 1/2” microphone with a nominal sensitivity of 50mv/Pa: 17 dBA.
Maximum RMS level 137 dBA, Maximum Peak level 140 dB PeakC.

Noise Generator

Built in noise generator with Sine, White, Pink and 1/1 and 1/3 octave band passed filtered noise.

Reverberation Time

Parallel calculation of T15, T20 and T30 in addition to Tmax for Noise excitation and EDT for impulse excitation.

FFT

Sampling rate: 48 kHz.
Frequency resolution: 1.46 Hz or 2.92 Hz (FFT size 8192 or 16384 lines).
Upper frequency: 22 kHz
Functions: Auto spectrum, linear averaging.
Acquisition rate: ~700 ms – no overlap.
Display: Dynamic display zoom 1 – to 64 in power-of-two steps.
Time windowing: Hanning

Display

4,3″ colour display capacitive touch. Protected by an anti-smudge coated and scratch-proof glass.

GPS

Built in GPS
Support for external IP camera. With an external IP camera, you can make event triggered pictures. Pictures captured during a measurement is marked as events in the L/t graph and can be viewed on the Nor145, in NorCloud or  NorReview.

Datastorage / Datatransfer

Storage modes: Manual, Auto, Repeat and Synchro. Synchro synchronise the start of the next measurement to the next full hour.
Internal memory: 350 MB – not used for measurement storage.
Micro SD card: Supports XC and HC standard. No limitation in max. SD card size.
Data transfer via LAN and USB.
Optionally built in GPRS – 3G/UMTS – 4G/LTE and Wifi infrastructure and hotspot.
Internal antenna supports 3G/4G. External antennas with diversity may be connected. External antenna supports also GPRS connection.

Inputs

Microphone input: One microphone input. Supports standard 7 pin Lemo preamplifiers including SysCheck, Microphone heating, TEDS and IEPE.
Polarization voltage: 0
Preamplifier voltage:  ± 15V.
Comment microphone: Via 3,5 pin mini jack.

Analogue outputs

AC out, 100mV full scale on 15 pin I/O socket.
3 pin mini jack headphone socket for replay of voice notes, listen to microphone AC signal or replay of audio recordings. Comment microphone for voice notes is connected to same plug.
Signal generator on 15 pin I/O socket with Pink, White, Bandpass filtered, sine and impulse noise.

Power

Rechargeable 7 Ah Li-Ion batteries with built in fuel gauge.
External power: 9 – 15Vdc 3-5Watt.
Typical battery lifetime: 8 hours.

Dimensons & weight

Dimensions: 235 x 82 x 29 mm (ex. preamplifier and microphone LxWxH)
Weight : 535 g (including preamplifier and microphone)