CN2203777Y - Portable testing instrument for spent chlorine - Google Patents
Portable testing instrument for spent chlorine Download PDFInfo
- Publication number
- CN2203777Y CN2203777Y CN 94214780 CN94214780U CN2203777Y CN 2203777 Y CN2203777 Y CN 2203777Y CN 94214780 CN94214780 CN 94214780 CN 94214780 U CN94214780 U CN 94214780U CN 2203777 Y CN2203777 Y CN 2203777Y
- Authority
- CN
- China
- Prior art keywords
- integrated package
- resistance
- potentiometer
- circuit
- liquid crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model relates to a portable detecting instrument for residual chlorine, belonging to the class of detecting devices for water quality; one side of a plastic case body is provided with a water tank; two electrodes are arranged on the wall of the water tank; a twisting button switch, an indicating lamp, a zeroing and amplitude-modulating potentiometer, a power switch and the integrated package of liquid crystal display are arranged on the case body; a battery box and a battery are arranged in the case body. The circuits of the detecting instrument comprise an oscillating circuit composed of a resistor, a capacitor, a triode and a transformer, a zeroing circuit composed of an integrated package, a resistor and a bleeder circuit, an amplifying circuit composed of the integrated package and the resistor, and a display circuit composed of the integrated package of liquid crystal, a potentiometer and a display switch. According to an electrical signal produced by the content of the residual chlorine in water, the detecting instrument displays a corresponding value with digitals via the liquid crystal, and can be used for knowing the content of the residual chlorine in the water conveniently and quickly.
Description
The utility model belongs to the water quality detecting device class.
Adding chlorine to reach the effect of sterilization in water, is the method that generally adopts to water supply department at present; The quality that how much directly influences water treatment of residual chlorine influences the healthy of people in the water; Can chlorine content be a very important job in the water so detect quickly and accurately; The method that detects chlorine residue in the water at present adopts the stupid aniline colorimetric method of the adjacent first of connection, iodimetric titration mostly; Relatively more bothersome, time-consuming.
The purpose of this utility model is: a kind of simple in structure, easy to operate portable residual chlorine detecting instrument is provided.
The technical solution of the utility model is: adopt a plastic box body; In box body one side a plastic cistern is arranged, two electrodes are housed in the two wall bottoms that water tank is relative; The Show Button switch, pilot lamp, zero potentiometer, amplitude modulation potentiometer, power switch, liquid crystal display integrated package piece are housed on box body; Battery case and battery are housed in box body, the circuit of this detector is: the oscillatory circuit of being made up of resistance, electric capacity, triode and transformer, the detection zeroing circuit that the bleeder circuit of being made up of follower integrated package and resistance, amplifier chip and resistance, resistance and potentiometer constitutes, the amplifying circuit of forming by summing amplifier integrated package, follower integrated package, resistance, the display circuit of forming by liquid crystal integrated package, potentiometer and display switch.
Detector of the present utility model can show by the liquid crystal integrated package water containing chlorine amount with the numerical value correspondence, have conveniently, accurate, practical good effect.
Fig. 1 is a contour structures synoptic diagram of the present utility model.Be 2 to be circuit diagrams in the box body.
1 is a box body among the figure; Side at box body is equipped with a plastic cistern 6, is pasted with two electrodes (K1, K2) in two relative wall bottoms of water tank; The Show Button switch 2, pilot lamp 3, zeroing current potential 4(R5 are housed on box body 1), amplitude modulation potentiometer 5(R14), power switch 7, liquid crystal display integrated package 9.Battery case and battery are housed in box body 1; The circuit of this detector is: the oscillatory circuit A that is made up of resistance R 1 and R2 and R3, capacitor C 1, triode BT33 and transformer T; By follower ic chip 1 and resistance R 8, amplifier chip IC2 and resistance (R9, R10, R11, R7), resistance R 4 and R6 and potentiometer 4(R5) the detection zeroing circuit B that constitutes of the bleeder circuit formed; The amplifying circuit C that forms by summing amplifier ic chip 3, follower ic chip 4, resistance R 12 and R13; By liquid crystal integrated package 9, potentiometer 5(R14) and the display circuit D that forms of the Show Button switch 2.Resistance R 0 among the figure and pilot lamp 3 are to indicate as power supply status.The annexation and the course of work of above-mentioned four part circuit are: the triode among the oscillatory circuit A adopts unijunction transistor BT33, collector and transformer elementary linking to each other of electricity, grounded emitter, the inferior utmost point one end ground connection of transformer T, another termination potential electrode TK1, another electrode K2 is by resistance R 3 ground connection; Pack in water tank 6 behind the water, water resistance and resistance R 3 form dividing potential drop, and this dividing potential drop is defeated by the positive input terminal that detects the follower ic chip 1 among the zeroing circuit B; The output terminal of IC1 is received the positive input terminal of the summing amplifier ic chip 3 among the amplifying circuit C by resistance R 8; The bleeder circuit that resistance R 4, R6, potentiometer R5 form aims at zeroing and uses, resistance R 7 one terminates to the center head of potentiometer, the other end is connected on the negative input end of amplifier chip IC2, the output terminal of IC2 is received the positive input terminal of summing amplifier ic chip 3 by resistance R 9, IC3 is with the signal plus of IC1 and IC2 output, amplify then and deliver to follower ic chip 4, IC4 by potentiometer 5(R14) signal is sent into liquid crystal integrated package 9 among the display circuit D, change electric signal into numeric representation.R4 among the zeroing circuit B, R5, the bleeder circuit that R6 constitutes is used with zeroing, water quality difference because of the no chlorine water of various places, when using this detector, at first in water tank 6, add no chlorine water, by potentiometer 4(R5) processing of returning to zero, must not move again afterwards, when the chloride tap water of packing into detected, how many differences because of water containing chlorine, conductivity is also different, the electric signal that oscillatory circuit is changed, and this signal is through zeroing circuit B, amplifying circuit C carries out the A/D conversion, liquid crystal integrated package 9 among the input display circuit D is with the respective value of contents of residual chlorine in the numerical value demonstration water.The two-way control in 2 fens of the Show Button switch, the power supply of one tunnel control liquid crystal integrated package 9, the protective resistance R3 that one tunnel control survey electrode K1, K2 are indirect, when filling water in the water tank, press the Show Button switch 2, the resistance R 3 that is connected between potential electrode disconnects, and what instrument obtained is to flow through current signal chloride between electrode K1, K2; Measurement finishes water is poured out when unclamping the Show Button, connects protective resistance, makes the signal that is input to amplifying circuit unlikely excessive.Electrode K1K2 adopts the silver sheet can improve anti-interference, and ic chip 1 and IC2, IC3 and IC4 can adopt two double operational LM358.
Claims (1)
1, a kind of portable residual chlorine detecting instrument is characterized in that:
A, a plastic box body is arranged, a plastic cistern is arranged, two electrodes (K1K2) are housed in the two wall bottoms that water tank is relative in a side of box body; The Show Button switch (2), pilot lamp (3), zero potentiometer (4), amplitude modulation potentiometer (5), power switch (7), liquid crystal display integrated package (9) are housed on box body; Battery case and battery are housed in box body,
B, the circuit of this detector is: by resistance (R1, R2, R3), electric capacity (C1), the oscillatory circuit that triode (BT33) and transformer (T) are formed, by integrated package (IC1) and resistance (R8), integrated package (IC2) and resistance (R7, R9, R10, R11), resistance (R4, R6) and the detection zeroing circuit that constitutes of the bleeder circuit formed of potentiometer R5, by summing amplifier integrated package (IC3) follower integrated package (IC4), resistance (R12, R13) the amplification resistance of Zu Chenging is by liquid crystal integrated package (9), the display circuit that potentiometer (5) and the Show Button switch (2) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214780 CN2203777Y (en) | 1994-06-20 | 1994-06-20 | Portable testing instrument for spent chlorine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214780 CN2203777Y (en) | 1994-06-20 | 1994-06-20 | Portable testing instrument for spent chlorine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2203777Y true CN2203777Y (en) | 1995-07-19 |
Family
ID=33830956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94214780 Expired - Fee Related CN2203777Y (en) | 1994-06-20 | 1994-06-20 | Portable testing instrument for spent chlorine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2203777Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210900B (en) * | 2006-12-30 | 2010-11-17 | 仇晓丰 | Free chloride on-line detection process during hydrogenchloride synthesis and the device therefor |
-
1994
- 1994-06-20 CN CN 94214780 patent/CN2203777Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210900B (en) * | 2006-12-30 | 2010-11-17 | 仇晓丰 | Free chloride on-line detection process during hydrogenchloride synthesis and the device therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |