Description

ND9B Sound Level Calibrator 114DB 94DB Measures Microphone Noise Decibel + SLM-25 Sound Level Meter

ND9B Sound Level Calibrator:
Description:
This Sound Level Calibrator is small in size, light in weight, easy to carry. Although complex and advanced, it is convenient to use and operate. Its ruggedness will allow many years of use if proper operating techniques are followed.

Features:
- Simple & Easy Operation
- Digital Display with Backlight, Clearly Shows the Chosen dB Level
- Lightweight and Small Size
- Removable 1/2" Transducer Cap, Suitable for 1" and 1/2" Microphone Size
- Conforms to IEC60942 (IEC942) Class 1 Standard
- Solid Design Provides Accurate and Reliable Performance
- Suitable for Personal, Field and Laboratory use

Specifications:
- Sound Pressure Level: 94dB & 114dB (Based on 20µPa)
- Accuracy: ±0.3dB
- The frequency of the output sound level is 1000+0.1% Hz, so it can be corrected on A, B, C, D or linear frequency weighting
- Standard: ICE942 Class 1
- Application: diameter 12.7mm (1/2") and diameter 23.77mm (1") microphone and acoustic measuring instrument calibration
- Operating Temperature: -10℃ to 50℃
- Storage Temperature: -40℃ to 65℃
- Temperature Coefficient: 0 to 0.01 dB/℃
- Altitude Effects: For every 60m/196.9ft of sea level rise, the sound pressure decreases by 0.1dB
- Size: 137 x 51 x 51mm
- Net Weight: approx. 200g

Operation Steps:
1. Press switch button, you will hear a 1000Hz sound, press 114dB or 94dB button to select decibel parameter;
2. Turn on the power switch of sound level meter to be calibrated;
3. Carefully put a microphone into the sound cavity of the calibrator, make sure that the microphone is flat and that the sealing rubber ring seals and supports the microphone well;
4. After the calibration is complete, carefully remove the microphone. At the same time, press the power button to turn off the calibrator.

Note:
- It is powered by 2pcs 1.5V AAA batteries which are not included.

SLM-25 Sound Level Meter:
Description:
This Decibel Meter with PC Interface is compact and easy to use while providing you an accurate readings in a greater range than similar inexpensive sound meters on the market.
 
This sound meter can read between 30dB~130dB, and collect data to a PC using the compatible software (included in the set).
 
Applications includes: Environmental measurement, law enforcement, work place design, sound level analysis of machinery and engines.

Features:
- Automatic Ranging
- Fast/Slow time weighting selection
- 32000 Reading Internal Memory (Data record function)
- Data Logging function
- Max. Hold function
- Frequency weighting: A/C
- High Accuracy
- Bar graph display
- AC/DC function
- PC Interface (for Windows 10, 8, 7, Vista and XP)
- When connected to computer, the measurement are live on computer screen too
- White Backlight
- Adjustable Over / Under alert threshold via computer interface
- Maximum data recording limit can be adjusted via the PC interface
- Time display
- Automatic-off function setup
- Low Electric Quantity Alert
- Tripod Mount (Tripod not included)
- Includes CD Software ( language: English), AC/DC wire
- CE Certified & RoHS Compliant

Specifications:
- Standard Applied: IEC651 type 2, ANSI S1.4 type 2
- Calibration sound source: 94dB at 1kHz
- Measurement range: 30~130dBA
- Accuracy: +1.5dB (reference sound pressure standard, 94dB at 1KHz)
- Record Interval: 1~60 sec / 1~60 min / 1~24 hrs
- Frequency response: 31.5~8.5KHz
- Resolution: 0.1dB
- Frequency weighting: A/C
- Analogy bar graph: 2dB/1 Bar graph
- Measurement Unit: dBA / dBC
- Sampling rate: 2 times/second (FAST), 1 time/second (SLOW)
- AC signal output: 4Vrms/ full barograph, output impedance is approx 600 ohm
- DC signal output: 33mV/dB
- Dynamic characteristic: FAST (high speed) / SLOW (low speed)
- Data storage quantity: 32000 readings
- Compatibility: for Windows 10, 8, 7, Vista and XP (not for Mac OS)
- Item Weight: 215g
- Product Dimension: 228 x 64 x 43mm

Note:
- It can be powered by 4pcs 1.5V AA batteries (not included) or by USB power cable.

Package Included:
- 1 x Set of Sound Level Meter and Calibrator