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Standards: Class 1: IEC 61672-1:2013; Class 1: IEC 61260-1:2014
Weighting Filters: A, B, C, Z
Time Constants: Slow, Fast, Impulse
RMS Detector: Digital True RMS detector with Peak detection; resolution 0.1 dB
Microphone: Microtech Gefell MK 255; 50 mV/Pa; prepolarised 1/2” condenser microphone
Preamplifier: Integrated
Linear Operating Range: 25 dBA RMS ÷ 133 dBA Peak (in accordance with IEC 61672)
Dynamic Measurement Range: 15 dBA RMS ÷ 133 dBA Peak (typical from noise floor to maximum level)
Internal Noise Level: Less than 15 dBA RMS
Frequency Range: 3.5 Hz ÷ 20 kHz
Meter Mode Results: Elapsed time; Lxy (SPL); Lxeq (LEQ); Lxpeak (PEAK); Lxymax (MAX); Lxymin (MIN);
Lxye (SEL); 2 × LR (Rolling LEQ); 2 × LE (Estimated LEQ);
Ln (LEQ statistics); Lden; LEPd; Ltm3; Ltm5
Measurement Profiles: Simultaneous measurement in three profiles with independent sets of filters (x) and detectors (y)
Statistics: Ln (L1–L99); complete histogram in meter mode and 1/1 & 1/3 octave analysis
Data Logger: Logging of summary results; spectra distribution and statistics; weather data with logging step down to 1 s; time history of selected parameters with logging step down to 20 ms
1/1 Octave Analysis¹: Real-time Class 1 analysis per IEC 61260; centre frequencies from 4 Hz to 16 kHz
1/3 Octave Analysis¹: Real-time Class 1 analysis per IEC 61260; centre frequencies from 4 Hz to 20 kHz
Noise Directivity¹: Maximum noise energy directivity measurements in azimuth and altitude directions; noise energy distribution diagram
Audio Recording¹: Time-domain recording to WAV format with selectable bandwidth and recording period
Remote System Check: Built-in electrostatic actuator; manual or automated triggering
GPS: Time synchronization and localization
Memory: 64 GB (non-removable)
Display and Keyboard: 1.1” OLED display; 5 push-buttons keyboard
Communication Interfaces: USB; RS 232; UART (TTL); LAN; Bluetooth®; 4G modem; WLAN
Ingress Protection Rating: IP 54
Power Supply: Li-Ion rechargeable battery (non-removable)
Operation Time on Battery (10.8 V / 6.7 Ah):
– Modem off: up to 7 days
– Modem on: up to 4 days²
Solar Panel (not included): MPPT voltage 15.0 V ÷ 20.0 V
AC Power Supply (included): Input 100 ÷ 240 VAC; output +15 VDC 2.67 A; IP 67 housing
External DC Source (not included): Voltage range 10.5 V ÷ 24 V (e.g. 12 V or 24 V accumulator³)
Environmental Conditions – Temperature: −30 °C to 70 °C⁴
Environmental Conditions – Humidity: Up to 99 % RH, non-condensed
Dimensions: 860 mm length; 70 mm diameter excluding windscreen (windscreen diameter 130 mm)
Weight: Approx. 3.2 kg
