| 顯 示 器 | 18mm LCD，3 1/2 digits |
| 測量功能 | dB（A&C frequency weighting）, Time weighting（Fast, Slow）, Max hold, Max hold reset, AC output |
| 測試範圍 | 3 ranges （ 30 - 70 dB、60 - 100 dB、90 - 130 dB ） |
| 解 析 度 | 0.1 dB |
| 精 確 度 | Time weighting & frequency weighting meet IEC 651 type 1, calibrating input signal on 94 dB
（31.5 Hz to 8 kHz）, the accuracy of A weighting is specified as following:
31.5 Hz - ± 1.5 dB, 63 Hz -± 1.5 dB, 125 Hz - ± 1 dB、250 Hz - ± 1 dB, 500 Hz - ± 1 dB,
1 kHz -± 1 dB、2 kHz - ± 1 dB, 4 kHz - ± 1 dB, 8 kHz - + 1.5 dB to -3 dB |
| 頻率加權(quán)網(wǎng)路 | 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 |
| 測試頻率範圍 | 31.5 Hz to 8,000 Hz |
| 校 正 器 | B & K （Bruel & kjaer）, multi-fuction acoustic calibrator, model : 4226 |
| 麥克風種類 | Electric condenser microphone. |
| 麥克風尺寸 | 1/2 inch standard size. |
| 範圍選擇 | 30 to 70 dB、60 to 100 dB、90 to 130 dB，40 dB on each step,with over & under range indicating |
| 時間加權(quán)網(wǎng)路
（快 / 慢） | Fast - t= 200 ms, Slow - t = 500 ms,
* "Fast" range is simulated the human ear response time weighting.
"Slow" range is easy to get the average values of vibration sound level.
* The "Fast" & "Slow" time weighting range are designed to IEC 651 type 2 requirement |
| 校正方式 | Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.
Internal oscillation system, 1 KHz sine wave generator |
| 輸出信號 | AC output - AC 0.4 Vrms corresponding to each range step. |
| 輸出端子 | 3.5 phone output terminal is provided for connection with analyzer, level recorder, tape recorder. |
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