DL850/DL850V示波记录仪

DL850示波记录仪系列是模块化波形记录仪,可以同时测量电压、电流、应变、加速度等多种信号。
DL850系列具有高速采样、高绝缘耐压、多通道测量等优点,为节能领域的设备开发、评估和质量控制提供强有力的支持。
新特性
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简介
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超高速存储记录仪
- 高速(可达100MS/s)、高分辨率(最高16位)、隔离(最高1kV*1)
- 多通道,多达128个电压通道或128位逻辑输入
- 能以100kS/s的速度在16个通道同时进行连续硬盘记录*2
- 监视CAN总线、显示趋势波形(仅限DL850V)
- 15个插拔模块
*2.选用/HD0或/HD1选件时
DL850示波记录仪系列是模块化的波形记录仪器,可以同时测量电压、电流、应变、加速度等多种信号。DL850系列具有高速采样、高绝缘耐压、多通道测量等优点,为节能领域的设备开发、评估和质量控制提供强有力的支持。
测量越来越快的变频器信号
高速(100MS/s)、高分辨率(12位)、1kV绝缘测量。*YOKOGAWA的isoPRO技术提供最高的速度和业界领先的绝缘性能。通过以节能为目的的isoPRO核心技术,为追求高电压、大电流和高速动作的高效变频器开发提供了有力的保障。
实例 – 测量变频器输出
以足够高的时间分辨率精确测量变频器的上升波形,也可以确认过冲是否过大。
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高速&高耐压绝缘技术 | |
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通过高速光纤传输,模块实现了高速ADC时钟和数据绝缘。 720210高速100MS/s 12位绝缘模块(主机中最多可安装4个模块。) |
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未能捕捉到真实的上升波形
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准确捕捉到上升波形
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DL850拥有15种独特的插入式模块,几乎可满足任何测量任务。
DL850除了向后兼容DL750的所有测量模块外,又在产品线中增加了四个新的模块。自由组合这些模块后,不管是微弱电压到高速、高压信号都可测量。
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更先进 – 更多的测量点 – 最多128 CH的电压输入和128位的逻辑输入
使用16-CH电压输入模块(扫描型*)时,即使16个通道全部使用,也能以10kS/s的采样率进行测量。使用8个输入模块插槽,DL850可执行128CH的电压测量。
逻辑输入模块能够以高达10MS/s*的速度,测量从TTL电平到高电压接点闭合的所有信号。通过八个逻辑模块,DL850可以监视并执行128位的逻辑测量。
实例:测量多输出电源
家用电子产品的电源输出数量较多,需要控制各个输出之间的顺序。使用多通道模块,就不再局限于电压测量,只要一台仪器就可以完成从PC控制信号到AC风扇动作、每个部件的温度,从低速至高速信号的所有测量。![]() |
Ch 1:AC输入电压 Ch 6:电源电压 Ch 2:基准电压 Ch 3:复位信号 Ch 1:风扇运转 16位逻辑:控制信号 4位逻辑:串行通信
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以高采样率捕捉耐久性测试中的突发现象 – 双捕获功能
进行耐久性测试时,为能把握长时间的趋势数据,通常以低采样速率采集趋势数据。但突发的高速瞬时现象,需要用高采样率来捕捉。通过“双捕获”功能,可以采用不同的采样速率进行记录,以解决此问题。
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缩放波形 - 最大采样率为100kS/s时,可以边进行趋势测量边以最高100MS/s的速度记录5k~500kpts的高速触发测量数据,最多可以记录5000个现象。记录长度为5-500k点。
- 事件波形 - 显示采集到高速波形时的时间。
- 低速主波形 - 最高100 kS/s 以低速滚动模式显示趋势波形
- 捕捉波形 - 最高100MS/s以高速触发测量捕捉突发现象

汽车以及其它交通运输工具的部件对可靠性的要求非常高。在不同温度环境下执行连接器的振动试验时,“双捕获”功能将发挥作用。
- 用高采样速率准确观测震动
- 用低速采样率确认发生频率
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回放过去的波形 – 历史功能
执行高速重复测量期间,当您看到异常现象并按停止键时,异常现象往往已从屏幕上消失。
通过历史功能,可自动对大容量内存进行分割并自动保存多达5,000屏历史波形,随时可以回放这些波形。
![]() 提取异常波形
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搜索历史波形
要提取特定的异常波形,可以通过设置条件对历史波形进行搜索。可以在屏幕上画出四边形区域,并根据波形是否通过该区域对波形进行提取。也可以根据振幅和其它参数提取数据。
检查历史...![]() |
可以显示所有历史波形,并以最大1µs的分辨率显示波形捕捉时间列表 |
| 关键点 测量期间不需要操作历史功能。完成测量后可以随时调出历史波形。调用波形后,可以缩放感兴趣的位置或执行参数测量。 |
拥有丰富的触发功能
简单触发&增强触发
DL除了提供易于使用的“简单”触发外,还有各种“增强”触发功能,通过丰富的组合确保捕捉到想要的波形。
通过先进、易于理解的图形用户界面,可以直观地设置增强触发条件。

- 边沿:在单一的触发源的边沿触发(上升、下降、上升/下降)
- 时间:按指定时间或固定间隔触发
- A -> B(N):满足条件A后,条件B第N次得到满足时触发
- A Delay B:满足条件A并且时间已超过所设定的延迟量后,满足条件B时触发
- Edge On A:在满足触发条件A的情况下,在另一个边沿触发的OR条件下触发
- OR:多个触发源中只要满足一个触发条件就触发
- AND:多个触发源的触发条件都满足时触发
- 周期:满足波形周期的条件时触发
- 脉宽:在脉宽条件满足时间和设置时间长度的条件下触发
- 波形窗口:通过生成的波形窗口时触发
波形窗口触发
波形窗口触发功能可用于诊断典型的电源故障,如瞬时断电、电压下降或浪涌。此外,还可以高效检测频率波动、电压下降等现象(波形为40~1,000Hz的交流波形)。比较当前波形与基准波形(实时模板),如果当前波形超出容许的范围后触发。基准波形由前一波形实时自动生成。
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*显示屏上不显示波形窗口。 |
动作触发
捕捉到不常发生的现象时,可以使用“动作触发”功能,触发时执行事先指定的多个动作。
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选择邮件发送后,即使不在现场也可以马上知道发生的现象。 |
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优异的抗噪声性能
通过低噪声设计实现了良好的抗干扰性能。变频器电路中的浮动电压切换波形也可准确捕捉。
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实例:测量变频器门控信号![]() |
![]() 电压输入模块701250
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实时噪声抑制处理和功率运算 – 实时运算(/G3选件)
DL850配备用于运算的专用DSP(数字信号处理器),捕捉波形期间可实时执行通道间的运算。通道间的运算功能十分强大,可以按通道分别设置滤波运算。除FIR、IIR、高斯函数和移动平均滤波之外,还可以使用最多30个公式,例如带系数的四则运算、积分和微分、高阶函数运算等。- 显示测量波形和运算波形的任意组合(总数最多16个)。
- 可以设置无模块通道。
| 实例:三相功率运算 | |
| 电压与电流相乘求得功率后,可以对周期进行积分求取平均功率。通过实时运算功能,可以实时显示3相4线功率波形。 | ![]() |

| 关键点 在滚动模式下也能执行实时运算。运算波形也可作为触发条件。 任何空余的插槽(通道)都可用于定义实时运算。因此,运算前和运算后的波形可同时显示。 |
通过丰富的函数功能可直接显示想要的波形 – 用户自定义运算(/G2选件)
DL标配四则运算、时移、FFT等运算功能,可以显示消除偏置或去除延迟后的波形。此外,还增加了用户自定义运算功能(/G2选件),可以将微积分、数字滤波等多种函数进行组合并执行运算。用户自定义运算的设置屏幕

| 实例:用FFT分析波形 | |
| 配备用户自定义运算功能(选件)时,可以使用两个FFT窗口执行多种类型的FFT分析。在振动、冲击测试等应用中,可以方便地评估异常振动,还可同时测量其它信号。 | ![]() |
| 关键点 可以对频率轴指定对数分度。 |
自动提取振幅、频率和其它参数 – 波形参数和统计运算
在26种波形参数(波幅、频率等)中,最多可同时提取并显示24个参数。菜单以图标列表的形式显示,便于查看。| 统计运算 | |
| DL可自动提取周期波形并查找标准偏差和其它统计数据。也可对历史波形执行统计。 | |
检测和通知异常波形、判断通过/不通过 - Go/NO-GO判断
DL可以判断波形或波形参数运算值满足(GO)或不满足(NO-GO)预设的条件。判断测量结果时,将执行预设动作,并向用户通报观测到的异常波形和通过/不通过判断结果。此功能便于检测电子设备生产线的信号以及追踪异常现象。
| 实例:评估电机启东特性 | |
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电机启东后,利用参数计算达到某个参考转数的时间,随后通过GO/NO-GO(通过/不通过)判断是否合格。 |
支持多台仪器同步测量 – IRIG输入(/C20选件)
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通过输入IRIG时间码信号,可实现多台DL850同步测量。*DL850/ DL850V的内部时钟也与IRIG信号同步(锁定)。因此,即使执行连续的长时间记录,也能实现高精度的时间匹配。 |
| 关键点 通过连接配备IRIG输出的商用GPS接收机,可以执行远程定期观测,还可以使用时间触发功能。 |
实例:大型运输机的同步测量 在飞机机翼两侧或火车车厢之间的同步测量中,需要多台仪器实现时间同步。只需使用一条IRIG电缆,即可使数据获取同步。

*IRIG(Inter-Range Instrumentation Group)属于美国军用标准,用于与航空太空相关的数据记录。它是种载频为1 kHz/10 kHz的ASK(振幅移位)调制信号,同步精度最高达1µs。DL850支持格式:A00、B002、A132、B122
支持外部硬盘 – 外部硬盘接口(/HD0选件)
| 通过外部硬盘接口,可以连接商用eSATA标准硬盘驱动器。DL可以将数据保存到外部硬盘,如同使用内置硬盘。保存波形后,将DL850/DL850V连接从PC切换到外部硬盘,就可以立即使用波形数据。 | ![]() |
关键点
*硬盘实时保存速度取决于硬盘的性能。 |
确认迟滞和相位之间的关系 – XY显示功能
通过X-Y显示,可以确认两个信号之间的关系。此功能可用于测量两个正弦波的相位角等。
X轴和Y轴的组合设置多达四种,可以同时显示多个X-Y波形,这样便于找到相互间的关系。
还可以同时观测X-Y波形和正常T-Y波形(用电压轴和时间轴显示波形)。
实例:磁体动态BH特性运算 使用DL850可以测量磁芯的电压和电流,然后分析磁体磁通密度B和磁场强度H的迟滞。通过测量动态BH特性,可以评估磁致伸缩产生的能量损耗。

磁通密度:B = Integ (C1) / (K1*K2)
磁场强度:H = C2*K1 / K3
C1:电压,C2:电流
K1:匝数,K2:截面积
K3:磁路长度
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波形快照
按前面板的“SNAP SHOT”键后,即可保存被测波形的快照(当前屏幕的显示波形)。即使重新开始测量,也会保留波形快照,因此可以将它与任何新测的波形进行轻松比较。快照还可作为文件保存并加载。![]() 可以比较各种条件下的波形 |
实例:波形快照(白色)与其它波形的比较 |
Web服务器
![]() 使用Web浏览器即可控制并获取屏幕画面 – PC无需安装特殊软件。 |
使用Web服务器功能,可以通过以太网接口在PC上显示任何联网DL850/DL850V的屏幕画面。通过该画面,可以远程开始或停止测量、刷新仪器显示,获取屏幕快照(画面)。 |
支持多种语言
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前面板按键标签表(“面板表”)有八种不同语言。菜单和错误消息也支持多种语言。 |
保存屏幕图像、显示缩略图
![]() 为了方便浏览,可以以缩略图形式显示保存在存储介质中的屏幕画面。 |
可以将屏幕画面以PNG、JPEG或BMP格式保存到指定的存储介质。可将这些屏幕画面导入报告或由PC生成的文件中。 |
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新研发的CAN总线监视模块现已面市

可以对整个CAN系统作出评价。
CAN数据采集和趋势显示 – CAN总线监视模块

可以使用DBC数据库文件(.dbc)指定要监视的数据。通过我们免费软件Symbol Editor,可以加载并编辑数据库(自定义文件),使其转换为可被DL850V读取的文件(.sbl)。可以用信息、信号名称和物理单位代替数字代码(十六进制或数值)监视CAN信号。
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实例:实测信号和CAN总线信号的比较和验证 可以在同一画面中确认CAN总线数据的物理值趋势和与之相关的实测波形。例如,点火开关ON/OFF信号和与之相关的CAN信号,还可以与来自相关电压传感器或其它设备的实测信号一同显示,以便确认这些信号之间的相互关系。 |
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- EXT I/O - 可输出GO/NO-GO判断结果,也可以通过开始/结束和其它其它外部信号控制仪器
- 外部时钟I/O (EXT CLK IN) - 根据外部信号执行时钟采样(最高9.5MHz)。
- 外部触发输入(EXT TRIG IN)
- 外部触发输出(EXT TRIG OUT)
- 视频信号输出(VIDEO OUT) - 在外部RGB (XGA)显示器上确认波形。
- USB-PC接口 - 可从PC控制仪器。
- 以太网1000BASE-T - 标配
- GP-IB(可选)
- IRIG(可选*2) - 输入外部时间信号,实现多台DL850同步。
- 外部硬盘接口(可选*1) - 连接eSATA标准硬盘。
- SD卡插槽 - 符合SD、SDHC标准,标配
- USB外围设备接口 - 支持USB存储器、键盘和鼠标输入。
*1 内置硬盘和外部硬盘接口只能两者选一。
*2 GP_IB可与IRIG(/C20)选件并存。
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资料
应用
| 名称 | 描述 | |
|---|---|---|
| 混合动力汽车的电机驱动电路评价 | 对于混合动力汽车的电机驱动,必须要对变频器的波形进行评价。但是,变频器信号中还夹杂着开关电路的噪声。本案例讲解如何使用示波器和高速数采观测夹杂着噪声的实际波形对电机驱动电路的整体影响。 | 了解更多 |
| 汽车发动机性能评价(DL850/DL850V) | 发动机性能试验要综合评价输出和燃油消耗率,需要测量发动机的各种信号,如缸内压、温度、转速、流量、应力振动等等。 最近,由PC控制的多通道信号测量系统正在被引入这一测试领域。可实现高速数据采集的数据记录仪DL850、SL1000在测试需要更深入解析的部分能够发挥强大功能。 |
了解更多 |
| 汽车振动和噪音测试 | 在乘车舒适度评价中噪音和振动评价是不可或缺的。横河测量仪器可以用于在测量振动/噪音信号和其它信号(ECU指令信号或油温等),检查行驶情况等方面。 | 了解更多 |
| 汽车安全气囊动作试验 | DL850、DLM2000可检测汽车安全气囊内置加速度传感器的信号,确定输入时机和引爆时机,防止气囊错误动作。 | 了解更多 |
软件
| 名称 | 描述 | |
|---|---|---|
| 用于DL850/DL850V的LabVIEW驱动 | 用于DL850/DL850V的LabVIEW驱动 | y-Link |
| DL850/DL850V WDF文件存取库 | 此软件(DL850.dll)提供一个API(应用程序接口),用于获取DL850系列中保存的波形数据文件(*.WDF)。 | y-Link |
| MATLAB控制工具包(了解更多) | 此MATLAB工具包可以让DL系列示波器很容易的连接到MATLAB。此软件可用于在MATLAB中控制支持的DL系列仪器,或者通过GP-IB、USB或以太网等将数据从DL系列仪器传输到MATLAB。 | 了解更多 |
| USB驱动程序 | 当软件需要时需使用USB驱动程序。 | y-Link |
| X-Viewer 701992(了解更多) | Xviewer是一个离线查看和分析软件包。它还可以从某些Yokogawa仪器传输文件并对这些仪器进行远程控制。 | 了解更多 |
模块/附件
700924 100MHz差分探头
可用于宽频带、高电压浮动测量的差分探头
700929 10:1探头
隔离探头
700986逻辑探头
8位、非隔离、响应速度:1µs
附带两条测量线(B9879PX或B9879KX)。
用于DL750的700987逻辑探头 – 隔离输入
与测量线758917和758922、758929或701954转接线一起使用
701250模拟电压输入模块
高速10MS/s 12位隔离模块(2通道)
701251模拟电压输入模块
高速1Ms/s16位隔离模块(2 ch)
701255模拟电压输入模块
高速10MS/s 12位非隔离模块(2通道)
701260模拟电压输入模块
高电压100kS/s 16位隔离模块(带RMS,2ch)
701261通用电压&温度输入模块
通用模块(2通道)
701262通用电压&温度输入模块(w/AAF)
通用模块(带反混淆滤波器,2通道)
701265高精度温度输入模块
温度/高精度电压模块(2通道)
701270 – 应变输入模块(NDIS)
应变模块(NDIS, 2通道)
701271 – 应变输入模块(DSUB)
应变模块(DSUB,分流校准,2通道)
701275加速度&电压输入模块(w/AAF)
加速度/电压模块(带反混淆滤波器,2通道)
701280 – 频率输入模块
频率模块(2通道)
701926高电压差分探头
用于DL系列的701926高电压差分探头
701930电流探头
带宽:DC到10MHz (-3dB)
701931电流探头
带宽:DC到2 MHz (-3dB)
701933电流探头
带宽:DC到50MHz (-3dB)
701934探头电源
电流探头、FET探头和差分探头的电源。为最多4个探头提供电源,包括大电流探头。
701940 10MHz无源探头
无源探头
701947 100:1隔离探头
701947 100:1探头
701957路701958 D-sub电桥接头
包括D-sub电缆(5m)。支持分流校准。
702911-702912逻辑探头
逻辑探头
720210模拟电压输入模块
高速100MS/s 12位隔离模块(2通道)
720220 16通道电压输入模块
16-CH电压输入模块
720230逻辑输入模块
逻辑输入模块
720240 CAN总线监测模块
此模块可解析CAN协议、监视总线上的通信数据、显示时序趋势波形。
评论
Detroit Energy, Mark
My company has used Yokogawa ScopeCorder for about 15 years starting with the 708 model. My department has pretty much standardized on Yokogawa which allows multiple groups to use and borrow them as needed.
TT Engineered Solutions, Tim Taubert
The Yokogawa group have always taken good care of my equipment and instrumentation needs. I have been using the DL750 on some projects and all involved have asked how I am getting such amazing data and good measurements. I always use that opportunity to say it is not me, it is the equipment I use.
Yamaha Motor Co., Ltd.
We develop engines for racing motorcycles. Mainly, I'm in charge of developing measuring systems for engine performance evaluations and reliability tests.We do a variety of different evaluations on the engine test bench. We perform measurements on a regular basis of quite a number of items including the number of engine revolutions, torque, throttle opening, air-to-fuel ratio (A/F) which indicates the condition of the engine, concentrations of exhaust gases, pressure, and temperatures related to the exhaust and engine. We capture all of these signals and perform analysis using the DL750 ScopeCorder and the modular WE7000 PC-Based Measurement Instrument. Our job requires capturing suddenly-occurring abnormal phenomena as the engine turns and then observing the details while at the same time making long-duration observations of slow signals such as the air-to-fuel ratio (A/F). We use the DL750 ScopeCorder for such monitoring applications and measurement of valve behavior during unit testing.The DL750 has a color display which makes it easy to view 16 channels of data at once, and the long memory and zoom functions allow us to observe abnormal phenomena in detail.We also use the snapshot function frequently. It helps us tremendously by letting us freeze a waveform being displayed on screen and save it to MO disk or PC card. The DL750 also has an abundant array of interfaces so it's easy to use, and one reason we chose the DL750 is because of the Ethernet function that allows us to connect it to a network. We've been using DL series digital oscilloscopes for awhile, and we are very satisfied with them because they are easy to use and offer high cost-performance.
Mr. Atsushi Masuda from Hino Motors
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Hino Motors, Ltd.
Powertrain R&D Dept.HV Lab Mr. Atsushi Masuda |
I work on development for hybrid vehicles. Especially in recent years, I've been involved with the Advanced Clean Energy Vehicle Project (ACE project) at NEDO (New Energy and Industrial Technology Development Organization).
The objective of the ACE (Advanced Clean Energy Vehicle) project for 2003 is to work in cooperation with all the automobile manufacturers in order to reduce carbon dioxide emissions by developing new vehicles that combine hybrid structure, greatly decreased fuel consumption, clean energy, and after treatment technology for exhaust gases.
At Hino Motors, our goal this year is to come out with a hybrid bus with two times the fuel efficiency compared with our previous heavy duty diesel busses. We brought in five of the DL750 ScopeCorders for development on this new hybrid bus.
The bus under development has a new hybrid system and electrical storage units, and we use the DL750s to capture various signals in that system. For the storage unit we capture cell voltage, module voltage, current, temperature and other signals. In the engine we look at RPM, torque, and controller output signals, and in the hybrid system we measure motor, controller, temperature and many other kinds of signals, all of which undergo subsequent analysis.
Before, when the project was focused on storage research, we used 10 of the DL716 ScopeCorders to measure voltage. The DL716 accepted 16 channels of isolated input, and the long memory of that oscilloscope gave us high resolution that was really convenient for us. We chose the DL750 this time because it carries over the features of the DL716, but has improved long memory, is smaller in size, and adds GP-IB and Ethernet support which we think will be useful in the future.
By hooking up the five DL750s to a notebook PC via GP-IB, we can gather all 80 channels worth of data together using our customized LabVIEW software. We can send measurement commands to the DL750 from the PC, and that really speeds up our work. By gathering various kinds of data measured from the actual vehicle, the DL750 helps us understand what's going on inside the hybrid systems as they operate. During development of the new hybrid bus we analyze everything from the measured RPMs at a given accelerator position to the voltage values in the storage unit to energy consumption, and this lets us determine the most fuel-efficient control conditions for the hybrid system.
Lyondell Chemical Co, Jim Poux
I love this DL-750 scopecorder. The technicians here call it "my mistress". This is the single most powerful general purpose piece of test equipment I have ever seen. It found in one day a problem we lived with for 13 years, and paid for itself in one day. This machine excells at finding glitch events involving mixed signal types, such as relay logic, high and low voiltage AC and DC signals, AC or DC current signals, and 4-20 ma process controls. With 16 channels you can see a lot of data in one test. We also used this to investigate an electrical fire incident and found a very obscure design flaw, again in one day. We used the VGA output and a projector unit for a wall size view in a conf room and could step thru the circuit events a millisecond at a time, with 100% understanding of what was happening during a complex Y/Delta motor start sequence. This also found boiler trip problems where the event was so fast the flame safeguard computer was giving the wrong first out indication. The DL750 nailed the problem first time. I think this tool has gotten me two promotions in pay grade. It takes some time to learn, so don't expect to rent one and fix the world in two days. Buy it and learn it. Our DL750 was so useful and employed so much that the boss suggested I buy a second one. How often does that happen? Our second one, a DL750P named "The Terminator" is even better than the DL750. Jim Poux Lyondell Chemical Co.
Sony Electronics, Francisco Oliveros
The DL750 is fabulous. We have been using the unit to monitor AC line, investigate Instantaneous Stop conditions and to test live boards. It is safe and easy to operate (if you read the manual or receive technical service assistance). I truly recommend the unit to anyone that is involved in some kind of signal monitoring activity...it is great! I have only used 40% of its capacity more or less, but I am looking forward to squeeze every dollar we invested on it. I rate the unit at # 4 level because I am not familiar with other oscilloscopes similar to the DL750. Thanks.
Ford Motor Company, Essex, UK - Alasdair Gillespie
In the development of new engine control strategies we often have the need to capture and analyse many complex signals. To this end we have several Yokogawa Oscilloscopes including the DL750. The DL750 is an essential tool in our work, being used by engineers for a multitude of tasks: Software design and validation as well as Control system design and calibration.
In a recent case, we had a development issue with the control system for an engine actuator. On analysis of the signals within the software calibration tool we were unable to diagnose the issue. It wasn't until we used the DL750 with its high speed signal acquisition and multiple channel capability that we could fully understand what was going on.
In engineering, it is the understanding of a system's behavior that is the key to developing solutions. The DL750 gives us a window into the complexity of the signals in our systems. From there we have the means to develop highly refined control systems for our range of class leading diesel engines.
Alasdair Gillespie
HIL systems Engineer, Global Powertrain Controls Systems Engineering
Ford Motor Company
Ronald Tegeler
This is a powerful troubleshooting tool. It took me a couple of days to figure it out, but it really is versatile and capable of monitoring signals from instrument level all the way up to 480VAC. We have already used it to monitor & trend motor currents & frequency on our new production line. We were having troubles with the motor drive tripping, and we found out that the design speed/frequency for the application was estimated wrong from the beginning. We adjusted base frequencies for the product and it is running good now.
American Electric Power, John Mandeville
We have 2 DL750s. They are easy to setup and use. The channel to channel isolation / cross is one the best unit I have found. There are 2 things that could have been done better. First there is no tilt stand on the bottom. Also, the developers view this as an enhanced scope. So the vertical and horizotal units are always in per division. This is a little bit confusing since I really would like to set the range and not the volt/div * 8 div. Otherwise this is a very nice instrument.



















































