KR20000049631A - Multi-channel pH/Ion Measuring System of using the PC monitor - Google Patents

Abstract

PURPOSE: A system is provided to achieve an improved efficiency of measuring while allowing data collection and analysis to be performed in a convenient way. CONSTITUTION: A system is characterized in that a concentration of hydrogen ion, concentration of a variety of ions, oxidation-reduction potential(ORP), and a temperature can be measured simultaneously through six channels, a computer controls for such a measurement, and the measured data is collected and analyzed by the computer. The channel can be extended into thirty. A concentration of hydrogen ion, concentration of a variety of ions, ORP, and temperature are read from a sensor, and the read data is amplified and converted into digital signal and transmitted to a computer through an input/output unit(RS232C). The computer performs temperature compensation and operation for the received data. The computer outputs a command for correction/measuring and has a function of real-time data collection. Thus-obtained data can be stored in file or printed through a printer.

Description

Multi-channel pH / Ion Measuring System of using the PC monitor}

The present invention relates to a water quality measurement system capable of simultaneously measuring, recording, and analyzing a hydrogen ion concentration (pH), concentrations of various ions, redox potential (ORP), and temperature of an aqueous solution by a computer in several channels at the same time.

At present, there are many instruments capable of measuring hydrogen ion concentration (pH), concentration of various ions, redox potential (ORP) and temperature. However, these instruments can only measure in one channel, and if you want to use it in multiple channels, you need to connect a multi-switch box. 2) These devices cannot see the data measured on all channels at the same time and switch to the corresponding channel to check the data. 3) There is a problem in storing a large amount of data by storing the data in the memory of the measuring instrument.

The present invention is to solve the above problems (1) a device capable of measuring the hydrogen ion concentration (concentration of various ions or redox potential) and temperature in six channels at the same time, (2) computer and measurement By connecting devices, other commands such as measurement / calibration are performed by a computer, and provide an automated system that can measure, record, and analyze multiple channels simultaneously.

1 is a block diagram of the present invention;

2 is a block diagram of a measuring device

3 is an overall flow chart of the present invention.

The present invention is a system capable of simultaneously measuring the hydrogen ion concentration (concentration of various ions or redox potential) and temperature of various channels on a computer.

Hereinafter, described in detail by the accompanying drawings as follows.

FIG. 1 is a block diagram briefly illustrating a process of reading a value from a detector and displaying data transmitted to a computer through an input / output device of a measuring device.

2 is a block diagram showing the configuration of a measuring device. Reads hydrogen ion concentration (concentration of various ions or redox potential) of each channel and current or voltage sensed by temperature sensor (1), and amplifies current or voltage according to item through amplifier (2) to process these data simultaneously After transmitting to the multi-channel analyzer (3), the analog signal is converted into a digital signal from the analog-to-digital converter (4). The converted data is transmitted to the computer through the input / output device (RS232C). The data transfer from the measuring device to the computer is done by the computer program command, and the data is displayed on the monitor after performing temperature correction or calculation processing in the computer. This data can be saved in the form of a file and output to a printer.

At this time, the measurement range and the error range are as follows.

For hydrogen ion concentration (pH), the measuring range is -2.000 ~ 19.999 and the maximum error is 0.002pH,

For the redox potential (ORP), the measuring range is -1999.9 to 1999.9 mV and the maximum error is 0.1,

In case of concentration of various ions, the measuring range is 0.00001 ~ 99,999 mg / L and the error is 0.25%,

The temperature is between -10.0 and 110.0 ° C, with an error of up to 0.1 ° C.

As described above, the present invention is a system capable of simultaneously measuring several channels with hydrogen ion concentration, concentration of various ions, or redox potential and temperature with a computer. 1) Simultaneously measuring and displaying data of several channels on one screen. Therefore, it is easy to analyze the data, and 2) it is convenient to collect and analyze the data by processing the data in the computer, thereby improving the inconvenience of the conventional measuring method and the problems of the prior art according to the data collection and analysis. A measurement system can be achieved.

Claims (2)

It reads and converts the values of the six-channel (expandable to 30 channels) hydrogen ion concentration (concentration of various ions or redox potential) sensor and temperature sensor, and then transfers them to the computer through the input / output device of the measuring device to compensate for the temperature. Water quality automatic measuring device that includes real-time data collection and analysis function, after processing, correction / measurement is executed by computer command. A measurement circuit that reads the hydrogen ion concentration (expansion of various ions or redox potential) of six channels (expandable to 30 channels) and the current or voltage sensed by the temperature sensor (1) and amplifies the minute signal accordingly. ), A multi-channel analyzer (3) that processes each sensed signal at the same time, an analog-to-digital converter (4) that converts analog signals into digital signals for processing by the CPU, and performs calculations to output each measured measurement value. And a data input / output device (RS232C) (6) for outputting data processed by the CPU to a computer.