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Multi-Frequency Acoustic Calibrator

1" Microphones - IEC 60942 Class 1 | Model CAL1250

Larson Davis Acoustic Calibrator Model CAL1250 is a battery-operated precision microphone calibrator used for the calibration of sound level meters and other sound measurement equipment with 1” and smaller microphones. CAL1250 provides an output level of either 94 dB or 114 dB at 251.2 Hz or 1000 Hz. The four combinations of frequency and level make the CAL1250 a great choice for extended field validation of instruments.

The CAL1250 includes a rugged carrying case but fits in any case designed to include the CAL1150 or CAL1200. Adapters for 1/2” and 1/4” microphones are included with optional adapters for 3/8” and 1/8” microphones available.

Highlights 

  • Output level: 94 dB or 114 dB 
  • Output frequency: 251.2 Hz or 1000 Hz 
  • Meets IEC 60942:2017 and ANSI S1.40-2006 Class 1 requirements 
  • Includes rechargeable lithium battery 
  • Displays temperature, humidity, and barometric pressure on OLED display

Applications

Field or laboratory calibration of: 

  • Sound level meters 
  • Noise dosimeters 
  • Precision microphones 
  • Multi-point field validation

Key Specifications for Model CAL1250

Frequency251.2 Hz ± 1 Hz or 1000 Hz ± 1 Hz
Calibration Sound Pressure Level
94.0 dB or 114.0 dB ± 0.2 dB
Minimum Stabilizing Time10 s after coupling microphone and calibrator
Dimensions (L x W x H)3.85 x 2.43 x 1.57 in (98 x 62 x 40 mm)
Weight5.5 oz (156 g)
Charging ConnectorUSB-C