Multímetro interfaceado de baixo custo para aquisição de dados

Química Nova

Eduardo M. Richter¹  Fábio R. P. Rocha¹  Lúcio Angnes¹ 

[1] ,Universidade de São Paulo Instituto de Química Departamento de Química FundamentalSão Paulo SP

关键词: data acquisition;    digital multimeter;    flow analysis;   

DOI  :  10.1590/S0100-40422004000200023

来源: SciELO

【 摘 要 】

A digital multimeter (~U$ 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.

【 授权许可】

CC BY-NC   
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