Multi-Frequency Acoustic Calibrator
Mics from 1/4" to 1" - 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
- Ships with valid ISO 17025 compliant calibration certificate
Applications
Sound level meters
Noise dosimeters
Precision microphones
Multi-point field validation
Standards
| Safety | IEC 61010-1:2017 |
| Acoustic | ANSI S1.40-2006, Class 1 IEC 60942:2017, Class 1 |
| EMC | Directive 2014/30/EU |
| CE | Yes |
| ROHS | Directive (EU) 2023/1437 |
Measurements
| Frequency | 251.2 Hz ± 1 Hz or 1000 Hz ± 1 Hz |
| Calibration Sound Pressure Level | 94.0 dB or 114.0 dB ± 0.2 dB |
| Minimum Stabilizing Time | 10 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) |
| Weight | 5.5 oz (156 g) |
| Charging Connector | USB-C |
Accessories
| ADP117 | 1” microphone adaptor for CAL1250 only |
| ADP118 | ½” microphone adaptor for CAL1250 only |
| ADP119 | ¼” microphone adaptor for CAL1250 only |
| CCS064 | Transportation and storage case |
| CBL242-03 | USB charging cable (USB-C to USB-C) with included USB-C to USB-A adaptor |
| Calibration | Valid ISO 17025 compliant calibration certificate |
| ADP120 | 1⁄8” microphone adaptor for CAL1250 only |
| ADP121 | 3⁄8” microphone adaptor for CAL1250 only |