Portable compact battery operated sound level calibrator suitable for many sound level meters.

When a microphone from a sound level meter is inserted into this calibrator, the sound level meter picks up the signal and displays the signal in dB (decibel) units. The sound level meter should be adjusted (if necessary) to match the calibrator's output signal as closely as possible

Calibration frequency at 1K Hz with three levels 114dB, 94dB and 104 dB. The 1000 Hz frequency allows calibrating sound level meters with any frequency weighting (LIN, A, B, ...), without applying any correction factor.

It can be conveniently used both in laboratory and in the field. The 114 dB sound level allows performing calibrations even in high background noise environments.

Features:

Meet IEC 60942:2018, class 2 standard
Stay accurate even in extreme humidity condition
Suitable for all sound level meters with microphone head mechanical compliant with IEC 61094-1 or IEC 61094-4 in a 1/2"(13.2mm) microphone size
Calibration frequency at 1K Hz with three level 114dB, 94dB and 104dB
Vivid LED display with stability and low power indicator
Battery powered, easy to carry around

Specifications:

Calibration frequency: 1000Hz
Frequency accuracy: ±1.7%
Sound Pressure Level: 94dB / 104dB / 114dB
Sound Pressure accuracy: ±0.4dB
Microphone head cavity diameter: 13.2mm (½")
Stabilization time: 10 seconds
Total distortion: <3%
Ambient Condition Influence:
- Temperature and humidity influence: <0.4dB @ 0...40°C and 25...90%RH
- Static pressure influence: <0.1dB @65...108kPa
Stability levels
- Short term stability (<60s): ±0.15dB
- Stability after 1 year with normal use: ±0.35dB
LED indicator: 1 green/Red: ready/low power; 3 green: 114/101/94dB
Operating Environment: 0~40°C; 25~90%RH
Storage Environment: -20~50°C; <90%RH
Dimension: 60 x 130 x 37.5mm
Weight: ~400gms
Battery: 2 x AA Alkaline battery

Set includes:

1 x Sound Level calibrator
2 x AA battery
English instruction manual
Standard Factory Packaging