A low cost multimeter for data acquisition

被引：0
|
作者：
Richter, EM [1 ]
Rocha, FRP [1 ]
Angnes, L [1 ]
机构：
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508900 Sao Paulo, Brazil
来源：
QUIMICA NOVA | 2004年 / 27卷 / 02期
关键词：
data acquisition; digital multimeter; flow analysis;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A LOW COST MULTIMETER FOR DATA ACQUISITION. A digital multimeter (similar toU$ 240.00 on the national market) connected to a microcomputer by a RS-232 serial interface is proposed for data acquisition in equipment with analog output. Data are measured at the rate of 2 points per second and stored in text files by the software that accompanies the device, running in a Windows environment. The performance of the multimeter was verified by monitoring the transient signals generated in flow injection systems associated with fluorimetric, spectrophotometric and flame photometric detection. In addition, the performance of the proposed device was similar to that attained by employing an interface card with a 12-bit analog-to-digital converter for acquisition of the signals generated by a capillary electrophoresis equipment with oscillometric detection.
引用
收藏
页码：313 / 314
页数：2
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