Precision sound calibrator Larson Davis CAL250

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Model	CAL250
Manufacturer	LARSON DAVIS (a part of the PCB PIEZOTRONICS)
Power supply	6.7 V to 10 V
Weight	156 g
Size	124 x 44.5 mm
Condition	Stocking
Warranty	12 months

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Specifications
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IEC 60942 Class 1 Precision sound calibrator Larson Davis CAL250 for 1" microphones at 251.2 Hz Used for Sound Level Meters and Other Sound Measuring Equipment

I. Specifications of Portable sound level calibrator Larson Davis CAL250

1" MICROPHONES - IEC 60942 CLASS 1 CALIBRATOR

Precision sound calibrator Larson Davis CAL250 is a battery operated precision microphone calibrator for 1" microphones used for the calibration of sound level meters and other sound measurement equipment.

The CAL250 delivers a full 114.0 dB level output signal at 251.2 Hz. A 1/2" microphone adaptor is supplied with the CAL250. Adaptors for 1⁄8", ¼", and 3⁄8" microphones are available as optional accessories.

It has been designed for both field and laboratory use and the accuracy has been calibrated to a reference traceable to the National Institute of Standards and Technology (NIST).

The Larson Davis CAL250 features a stable sound pressure independent of the battery condition. In addition, the CAL250 will turn off automatically to preserve battery and guarantee a stable output.

In addition to precision acoustic calibrators, factory calibration services for Larson Davis products are available through the CAL+ program. CAL+ service is provided with all Larson Davis calibrations and includes a complete multi-point factory test, free firmware upgrade to the latest version where applicable, labor warranty extended for one year[1], worn consumables replaced at no charge[2], and more. Contact us for details.

HIGHLIGHTS

Output level: 114 dB
Output frequency: 251.2 Hz
Standard: 1" microphone
IEC 60942-1:2003 compliant
Internal battery
Output level independent of battery condition
Adaptors: ¹⁄8", 1/4", 3⁄8", 1/2" microphones
Array adaptor for 8 microphones simultaneously.

TYPICAL APPLICATIONS

Field or laboratory calibration of:

Sound level meters
Noise dosimeters
Noise monitoring stations
Microphone arrays.

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Technical specifications of Precision sound calibrator Larson Davis CAL250

SPECIFICATIONS
Acoustic
Calibration Sound PressureLevel Initial After 1 Year	114.0 dB ± 0.1 dB re: 20 μPa ± 0.2 dB re: 20 μPa
Equivalent Free-field Level	0.0 dB for 1/2″ microphones
Frequency	251.2Hz ± 0.7%
Harmonic Distortion	< 2 %
Stability After Pressing On	± 0.1 dB after 2 seconds
Minimum Stabilizing Time	10 seconds after coupling microphone and calibrator
Reference Conditions	101.3 kPa, 23 ºC and 50 % RH
Environmental
Static Pressure Range	65 kPa to 108 kPa	SPL variation < ± 0.25 dB
Temperature Range	-10 ºC to +50 ºC	SPL variation < ± 0.4 dB Frequency variation < ± 2 Hz
Humidity Range	10 % to 90 % RH non-condensing	SPL variation < ± 0.4 dB Frequency variation < ± 2 Hz
Storage Temperature	-40 ºC to +60 ºC
Storage Humidity	0 % to 90 % RH (non-condensing)
Physical
Effective Volume of Calibrator and Microphone	> 6.1 in3 (100 cm3)
Dimensions (L x W x H)	4.9 x 1.75 in (124 x 44.5 mm)
Weight	5.5 oz (156 g)
Power Supply
Battery	9 V NEDA 1604 A or IEC 6LR61
Battery Voltage Operating Range	6.7 V to 10 V
Traceability
Traceability	Traceable to National Institute of Standards and Technology (NIST)
Supplied Accessories
ADP019 Adaptor for 1/2″ Microphone
CCS003 Storage Case
9 V Alkaline Battery
Users Manual
Related Products
ADP020	Adaptor for 3⁄8″ microphones
ADP021	Adaptor for 1/4″ microphones
ADP023	Adaptor for 1⁄8″ microphones
ADP031	Adaptor for 3⁄8″ microphones
COMPLIANCE
Acoustic
ANSI S1.40-2006, Class 1
IEC 60942-2003, Class 1
IEC 60942:2017, Class 1
Safety
IEC 61010-1:2001
EMC
EU directive 2004/108/EC
IEC 61326-1:2005
For Use with Microphones of Type
IEC 61094-4:1995	1″ WS1P, WS1F and WS1D
	1/2″ WS2P, WS2F and WS2D microphones; with ADP019 adaptor
	1/4″ WS3P, WS3F and WS3D microphones with ADP021 adaptor
According to IEC 61094-1:2000	1/2″ LS2P
Other Microphones	3⁄8″ with ADP020 adaptor 1⁄8″ with ADP023 adaptor
For Use with Sound Level Meters and Noise Dosimeters
ANSI S1.4 Type 1
ANSI S1.25
IEC 61672 Class 1
IEC 61252
[1] Requires regular annual factory calibration. Limited to seven (7) years. [2] Windscreen, O-rings, desiccants, fuses, for example.