CN
当前地点
×
CN

选择下面的区域更改地点:

切换菜单
CN
当前地点
×
CN

选择下面的区域更改地点:

联系我们

与泰克代表实时聊天。 工作时间:上午 9:00 - 下午 5:00(太平洋标准时间)。

电话

致电我们 1-800-833-9200

工作时间:上午9:00-下午5:00(太平洋标准时间)

下载

下载手册、产品技术资料、软件等:

下载类型
型号或关键字

10 Steps to Digital Multimeter (DMM) Selection


Maximizing DMM Productivity in Wireless Device Quality Testing

Digital multimeters seem common, but specialized versions perform tests you might not imagine, thereby improving productivity and lowering costs.

Digital multimeters (DMMs) have for years been a quality assurance test tool used by wireless device manufacturers. However, DMM performance has steadily improved and you can now get functions never imagined on these instruments. For example, you can now buy benchtop DMMs with basic one-year accuracy ranging from 0.0006% to 0.03%, resolution from 4-1/2 digits to 8-1/2 digits and sensitivity from 1nV to 10mV. For audio circuit and component testing, total harmonic distortion (THD) can be measured with some specialized DMMs.

While accuracy, resolution and sensitivity are important factors in DMM selection, you should look at speed, specialized functions and productivity enhancements for added value, especially if you do production testing. Also, certain features can help overcome external noise problems that would otherwise nullify the underlying accuracy and sensitivity of a DMM. Major selection factors include measurement variables, range, accuracy, resolution, sensitivity, speed, filters, test current limiting in resistance measurements, 2-wire vs. 4-wire measurements, triggering, number of measurement channels and cost.

  1. What variables are you testing?
  2. What is the range of expected signal values?
  3. The big three: accuracy, resolution and sensitivity
  4. What DUT characteristics are important?
  5. What are the hardware and software interface issues?
  6. What are the noise sources?
  7. What are the throughput requirements?
  8. How many DUTs are to be tested?
  9. Would additional DMM features be helpful?
  10. How cost effective is the solution?

Download to read the full details.