Model: CAL250

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Class 1 acoustic calibrator with 1 in opening and output of 114 dB re 20 uPa at 251.2 Hz. Includes ADP019 adapter for 1/2 in microphones and calibration certificate

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  • Operating Frequency: (±2Hz) 250 Hz
  • Output: (±0.2dB) 114 dB re 20 µPa
  • Distortion: <2 %
  • Configuration: Hand-Held

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Operating Frequency (±2 Hz)250 Hz250 Hz 
Output (±0.1 dB) (Sound Pressure Level)114 dB re 20 µPa114 dB re 20 µPa[1] 
Output (±0.2 dB) (Sound Pressure Level)114 dB re 20 µPa114 dB re 20 µPa[2] 
Distortion<2 %<2 % 
Temperature Range (Operating)14 to +122 °F-10 to +50 °C 
Barometric Pressure Coefficient≤0.3 dB≤0.3 dB 
Settling Time≤2 sec≤2 sec 
Internal Battery (Type)9V9V[4] 
Internal Battery (Quantity)11 
Battery Life70 hours70 hours[3][4] 
Size - Height1.8 in45.7 mm 
Size - Width1.8 in45.7 mm 
Size - Length5.0 in127 mm 
Weight9.0 oz255 gm 

All specifications are at room temperature unless otherwise specified.

Product Notes
[1] Initial Accuracy
[2] Accuracy After 1 Year
[3] Typical.
[4] Alkaline type recommended for longest service life.
079A31Adaptor for eight 1/4 inch microphones.(1)
ADP019Adaptor for 1/2 inch microphone.(1)
ADP021Adaptor for 1/4 inch microphone.(1)
Optional Versions:
No optional versions
Product Documents None Listed
Additional Downloads
CAL 250 Product Brochure
CAL 250 Manual
ManualProduct Manual for CAL250