品牌
生产厂家厂商性质
上海所在地
Circuit | Custom one-chip of microprocessor LSI circuit. |
Display | LCD size : 52 mm x 38 mm LCD with green backlight ( ON/OFF ). |
Measurement Range | 30 - 130 dB. |
Resolution | 0.1 dB. |
Function | dB ( A & C frequency weighting ), Time weighting ( Fast, Slow ), Peak hold, Data hold Record ( Max., Min. ). |
Accuracy (23 ± 5 ℃) | Characteristics of " A " frequency weighting network meet IEC 61672 class 1 Under 94 dB input signal, the accuracy are : Remark : The above spec. are tested under the environment RF Field Strength less than 3 V/M & frequency less than 30 MHz only. |
Frequency Weighting Network | Characteristics of A & C. A weighting : The characteristic is simulated as "Human Ear Listing" response. Typical, if making the environmental sound level measurement, always select to A weighting. C weighting The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment. |
Data hold | To freeze the measurement value. |
Circuit | Custom one-chip of microprocessor LSI circuit. |
Display | LCD size : 52 mm x 38 mm LCD with green backlight ( ON/OFF ). |
Measurement Range | 30 - 130 dB. |
Resolution | 0.1 dB. |
Function | dB ( A & C frequency weighting ), Time weighting ( Fast, Slow ), Peak hold, Data hold Record ( Max., Min. ). |
Accuracy (23 ± 5 ℃) | Characteristics of " A " frequency weighting network meet IEC 61672 class 1 Under 94 dB input signal, the accuracy are : Remark : The above spec. are tested under the environment RF Field Strength less than 3 V/M & frequency less than 30 MHz only. |
Frequency Weighting Network | Characteristics of A & C. A weighting : The characteristic is simulated as "Human Ear Listing" response. Typical, if making the environmental sound level measurement, always select to A weighting. C weighting The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment. |
Data hold | To freeze the measurement value. |