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MM560 参数 Datasheet PDF下载

MM560图片预览
型号: MM560
PDF下载: 下载PDF文件 查看货源
内容描述: 多主控数字万用表系列随着PC接口 [MultiMaster Digital MultiMeter Series With PC Interface]
分类和应用: PC
文件页数/大小: 21 页 / 614 K
品牌: EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
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Meter Description (MM570 Shown)  
1. Liquid Crystal display  
2. Function push-keys  
3. Rotary function switch  
4. 10A/-T2 input jack  
5. V/Hz//Cap/+T1 input jack  
6. COM input jack/-T1 input  
7. mA-uA current/+T2 input jack  
NOTE: RS-232 Optical interface is located  
on the top rear of the meter.  
Considerations & Features  
Average sensing RMS calibrated  
RMS (Root-Mean-Square) is the term used to describe the effective or  
equivalent DC value of an AC signal. Most digital multimeters use  
average sensing RMS calibrated technique to measure RMS values of  
AC signals. This technique is to obtain the average value by rectifying  
and filtering the AC signal. The average value is then scaled upward  
(calibrated) to read the RMS value of a sine wave. In measuring pure  
sinusoidal waveform, this technique is fast, accurate, and cost effective.  
In measuring non-sinusoidal waveforms, however, significant errors can  
be introduced because of different scaling factors relating average to  
RMS values.  
AC True RMS  
AC True RMS, normally referred to as True RMS, identifies a DMM  
function that is AC coupled, and responds accurately only to the  
effective RMS AC component value regardless of the waveforms.  
However, DC component plays an important role in the distorted non-  
symmetrical waveforms, and will also be of interest sometimes. A full  
wave rectified sine waveform is a good example, and the AC true RMS  
function will only give the AC component reading which is at 43.6% of  
the total effective RMS reading.  
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