介绍了便携式脉冲输出模块测试仪的原理和主要电路设计思想。
The principle and main circuit design ideas are given for the mobile pulse output module tester.
本文介绍一种便携式微差压测试仪的设计，详细分析它的系统结构以及主要模块工作原理，并对它的精度进行讨论。
This paper describes the design of a portable draft pressure tester and analyses its architecture and the working principle of its main module, and also discusses its accuracy.
同时，该测试仪还设计了用来实现仪器可程控的接口模块。
The tester also features programmable control by using the interfacing module.
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