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Integrating Basic Sound Level Meter
 
 

The Tango® sound level meter is a compact Class 1 basic sound level meter for workplace and environmental protection applications. Due to its intelligent software concept and its measuring range of 110 dB without switching to another range, Tango is still very easy to operate despite its high functionality. Using Tango, even inexperienced users are immediately able to correctly measure and interpret the current sound level.
Tango’s permanently polarized 1/2" microphone is automatically calibrated with a standard acoustic calibrator. The measured value is shown on a back-lighted high-contrast display and is readable even over larger distances in sunlight or in darkness. The clearly arranged keyboard has a perceptible keystroke. Being based on state-of-the-art circuit technology, Tango has an extremely low power consumption. Two batteries (1.2 ... 1.5 V, size AA) guarantee an operation time of 120 h and a storage time of 10 years (for lithium batteries). Therefore Tango is practically always ready for use.
The Tango sound level meter allows for simultaneous A- and C-frequency weightings as well as Fast (125 ms) and Slow (1 s) time weightings. In addition to the momentary sound level values (LAF and LAS) and the maximum sound level values over a given period (LAFmax, LASmax and LCpeak), Tango can also measure the LAeq, LAtm5 and LAtm5-LAeq values integrated over a given period. In addition, the exceedance times for three freely-selectable LCPeak thresholds can be measured.
The setup function is used to define which values are to be measured and which of these are to be saved, whereby the storage cycles can be chosen individually for the various measurement values.
With the help of the USB interface and the Tango-Utilities software, the measured values are read from the memory and converted to a standard format. Additionally, the software allows for the creation of a user-defined setup (measured values, saved values, storage cycles) which can easily be defined and transferred to the device.

Tango satisfies all requirements for a Class 1 sound level meter to be used for the following measurement tasks:

  • Traffic and industrial noise measurements
  • Neighborhood and recreation noise monitoring
  • Workplace noise measurements.
The accuracy of the measurement may be considerably improved by calibrating the sound level meter before each measurement. This calibration also remains intact after switching off the device.
Because of its reasonable price, easy operation and small dimensions, Tango is the ideal instrument for all users whose measurement tasks require a Class 1 measuring device according to the IEC 61672 standard but without frequency analysis, level statistics or audio recording.
The type approval by the PTB (legal calibratability in Germany) is scheduled.


Operation of Tango via USB interface

The Tango sound level meter may also be operated via USB interface. In this case the PC powers the device through the interface. The scope of delivery also includes a USB adapter for mains power supply.
The Tango Utilities software included in the scope of delivery allows the operation and configuration of Tango via PC as well as the data transfer between the two devices. A separate window is displayed on the PC which allows easy setting of the parameters and rapid transfer of the stored measurement values.
The interface also enables the user to integrate Tango easily into a PC-based measuring system.

 
Technical Data
Accuracy Class 1 according to IEC 60651 / 60804 / 61672
Official calibratability Planned
Measurement values
  • Sound pressure level LAF, LAS
  • Maximum sound level LAFmax, LASmax
  • Equivalent sound pressure level LAeq
  • Peak value LCpeak
  • Sound dose LAE
  • Taktmaximal level LAtm5
  • 3x peak-value exceedance times LCpeak_exceedance
  • Time of day / Measurement time / Exceedance time
  • Optional: 3x Percentiles LAFnn
Frequency weightings A + Cpeak
Time weightings Fast, Slow
Measurement range 30 ... 140 dB (LAeq)
60 ... 143 dB (LCpeak)
Resolution 0.1 dB
Display Illuminated LCD:
  • Measured value with 3.5 digits
  • Bar graph in 5 dB steps
  • < under-range, > over-range
  • Measurement time (hh:mm:ss)
  • Battery status
  • Memory status
Microphone 1/2" electret measurement microphone
Calibration Automatic to 94 dB (104/114 dB selectable)
Storage cycles Individually selectable for all measurement values from 62.5 ms ... 60 min
Storage capacity Up to 194 days, depending on storage cycles
Interface USB
Batteries 2 x AA (1.2 ... 1.5 V); all battery types may be used
Operating time per set of batteries > 120 h
Storage time for batteries 10 years (lithium batteries)
Dimensions 190mm x 70mm x 32mm
Weight 250 g (including batteries)
Scope of delivery Sound level meter, windscreen, manual, 1.5m USB interface cable, USB mains power supply, Tango Utilities software
Option 1 Expansion to 8MB memory plus 3 freely-selectable percentiles
Option 2 Measurement case with tripod
Option 3 Interface documentation for individual software development

 

 [Brochure] PDF-Document, English, 215 KB