AR-814

AR-824

Measuring Range

30～130dBA

30～130dBA

测量范围

35～130dBC

35～130dBC

Accuracy

±1.5dB

±1.5dB

测量度

Frequency Range

31.5HZ-8.5KHZ

31.5HZ-8.5KHZ

频率响应

Linearity Range

50dB

50dB

动态范围

AC/DC Output

√

√

AC/DC 信号输出

Auto Power Shut Off

√

√

自动关机功能

Low Battery Indication

√

√

低电显示功能

Over Range Indication

√

√

过载提示

Digit & Resolution

5Digits & 0.1dB

5Digits & 0.1dB

数位及分辨率

Time Weighting Selection

Fast/Slow

Fast/Slow

动态特性选择

Frequency Weighting

A & C

A & C

频率加权特性

Sound Measuring Level Selection

√

√

测量档位选择

Max Hold Function

√

√

大值锁定

Sampling Frequency

2 times/sec

2 times/sec