JP2013015450A - Analysis device equipped with liquid crystal display device having touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out contrast adjustment even when a contrast state of a liquid crystal display screen before adjustment is a white-out state or black-out state.SOLUTION: When a user makes contact to a touch panel for a prescribed time period or more, a screen for contrast adjustment is displayed. The position where a button for contrast adjustment is to be displayed is determined to a prescribed position. The contrast adjustment is carried out by touching the position in the state that the screen for contrast adjustment is displayed.

Description

  The present invention is an analysis device such as a water quality analyzer used for measuring pollutant components contained in sewage / river water, factory effluent, etc., and includes a liquid crystal display device with a touch panel as a display device for displaying analysis results and the like. The present invention relates to an analyzer.

  An example of such an analyzer is a water quality analyzer. In addition to the TOC meter that measures only the total organic carbon (TOC) contained in the sample, the water quality analyzer includes a TOC / TN meter that can measure both TOC and nitrogen compounds (total nitrogen: TN) (Patent Document 1). ), A total nitrogen (TN) / total phosphorus (TP) meter for analyzing both nitrogen compounds and phosphorus compounds (see Patent Document 2), a water quality analyzer capable of measuring TN, TP and organic pollutants ( (See Patent Document 3).

  Such a water quality analyzer specifies and displays measurement conditions, measurement schedule, etc. as setting items, measurement history display, measurement history storage, measurement data and measurement history printing, measurement history search, etc. as operation items. It can be made to operate or operate.

An analyzer having a plurality of setting items and operation items, not limited to a TOC meter, is displayed on the screen together with measurement data using a liquid crystal display device with a touch panel as a method for inputting instructions for the setting items and operation items. Some operations are performed using operation buttons.
In a liquid crystal display device, it may be necessary to adjust the contrast of the screen. Even when a liquid crystal display device with a touch panel is used, the contrast is not adjusted by touch panel operation, but the contrast of the liquid crystal screen is adjusted by a combination of a dedicated key or another function key.

JP 2007-24717 A JP 2007-86041 A JP 2001-56332 A

  Even when the operation is performed using the operation buttons on the screen of the liquid crystal display device with a touch panel, the touch panel is not used for the contrast adjustment for the following reason. To perform contrast adjustment using the touch panel, the contrast adjustment button is displayed on the liquid crystal display screen and the touch panel is operated. In this case, the contrast before adjustment is in the whiteout state (true white). This is because the button display cannot be seen in the blackout state (true black state) and the contrast cannot be adjusted.

  Therefore, an object of the present invention is to make it possible to adjust the contrast of a liquid crystal display screen even when the contrast before adjustment of the liquid crystal display screen is a whiteout state or a blackout state.

  In the present invention, the screen for contrast adjustment is displayed when a person touches the touch panel for a predetermined time or more, and the position where the button for contrast adjustment is to be displayed is determined as a specific position. By touching that position while the screen is displayed, you can touch that position even if you are in a whiteout or blackout state and cannot see it. It can be so.

  That is, the analyzer of the present invention includes a sample introduction unit and an analysis unit including at least a detection unit for detecting a component in the sample introduced from the sample introduction unit, an operation control unit for controlling the operation of the analysis unit, and a touch panel. A liquid crystal display device, a liquid crystal controller that configures a screen to be displayed on the liquid crystal display device and executes screen display on the liquid crystal display device, a touch panel controller that recognizes a touched position of the touch panel, and an adjusted contrast adjustment value In addition to the memory for storing the contrast adjustment value to be stored and the data screen indicating the detection result by the analysis unit on the liquid crystal display device via the liquid crystal controller, four buttons including buttons for adjusting the contrast of the screen are displayed on the rectangular screen. Display at least the contrast adjustment screens provided in the four corners and touch panel controller When the touch panel is touched for more than a preset time on the touch panel while only the screen other than the contrast adjustment screen is displayed, the contrast adjustment screen is displayed on the currently displayed screen. When the person touches the button for adjusting the contrast among the four buttons when the contrast adjustment screen is displayed, the contrast adjustment value is adjusted according to the instruction of the button, and the adjusted contrast adjustment value Display control unit for storing the image in the contrast adjustment value storage memory, and contrast adjustment for adjusting the contrast of the display screen of the liquid crystal display device according to the contrast adjustment value stored in the contrast adjustment value storage memory or an instruction from the display control unit And a circuit.

  Here, the four corners of the rectangular screen of the liquid crystal display device are specific positions where the buttons for contrast adjustment should be displayed. If the user is informed in advance that the four corners are at the specific positions, the contrast adjustment buttons are displayed even if the contrast adjustment screen is displayed even if the contrast adjustment screen is displayed. Since the operator knows where the corner is, the user can touch the position where the button should be displayed and adjust the contrast even if the button is not visible.

  In order to avoid a situation where the contrast adjustment screen is displayed by accidentally touching the liquid crystal display device when contrast adjustment is not performed, the touch panel is set in advance with only the screen other than the contrast adjustment screen displayed. The contrast adjustment screen is displayed only when touched continuously for a certain period of time.

  If the size of the specific position where the contrast adjustment buttons should be displayed at the four corners on the rectangular screen of the liquid crystal display device is too small, the operability deteriorates. The area of the screen other than is reduced, making it difficult to adjust the contrast. Therefore, as a preferred form, the vertical size of the button is about 1/4 to 1/3 of the vertical size of the display screen of the liquid crystal display device, and the horizontal size of the button is about 1/5 to 1/3 of the horizontal size of the display screen. It is appropriate to set to.

  In the present invention, the contrast adjustment screen is displayed by continuously touching the liquid crystal display screen for a predetermined time or more, and the contrast adjustment screens at the four corners on the displayed contrast adjustment screen are displayed. Since contrast adjustment can be executed by touching a button with a person, it is not necessary to provide a switch for contrast adjustment in a place other than the touch panel, and the contrast adjustment screen can be displayed only by the touch panel. When the contrast adjustment screen is displayed, the operator knows the position even in the whiteout or blackout state, so that the operator can touch the contrast adjustment button to adjust the contrast. It becomes like this.

It is a schematic block diagram which shows the TOC / TN meter of one Example. It is a block diagram which shows the display apparatus in the Example. It is a figure which shows the state by which the contrast adjustment screen was displayed on the data screen currently displayed on the display apparatus in the display apparatus. It is a flowchart which shows operation | movement of the Example. It is a schematic block diagram which shows the TN / TP meter of another Example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a TOC / TN meter according to an embodiment of the analyzer of the present invention. A flow path for discharging a part of the sample to the drain outlet 12 through the branch part 3 in the TOC meter main body 2 is connected to the water sampling pipe 1 through which a sample such as environmental water continuously flows. One port of the 8-port valve 14 of the sample injection mechanism 18 is connected to the branch part 3 of the sample flow path in order to collect a sample for online measurement and guide it to the analysis part.

  The sample injection mechanism 18 includes an 8-port valve 14 and a microsyringe 16 connected thereto, and the microsyringe 16 is connected to a common port of the 8-port valve 14 and is connected to any other port of the 8-port valve 14. It has come to be.

The ports other than the common port of the 8-port valve 14 include the branch part 3 of the sample channel, a channel connected to the acid 20 added to make the sample acidic when measuring the IC, and a calibration standard. A flow path connected to the liquid 22, a flow path connected to the pure water 24 used for dilution and washing, a flow path connected to the sample 26 for off-line measurement, and a TC including a catalyst for converting all the carbon components in the sample into CO _2. A flow path connected to the sample injection section 34 of the oxidation reaction section 32, a flow path connected to the drain outlet 28 for discharging unnecessary gas, and a flow path connected to the drain outlet 12 for discharging unnecessary liquid are respectively connected. Yes.

  A gas purification / flow rate control unit 40 is provided to remove a carbon component from the air taken in from the air inlet 42 to generate a purified gas, and to send out the gas by adjusting the flow rate. The gas outlet of the gas purification / flow rate control unit 40 includes a flow path 41a for supplying the purified gas generated by the gas purification / flow rate control unit 40 to the microsyringe 16 as a sparge gas or a carrier gas, and a TC oxidation reaction unit as a carrier gas. A flow path 41 b that supplies gas to the gas flow path 32 and a flow path 41 c that supplies purified gas to the ozone generator 50 are connected.

The TC oxidation reaction unit 32 introduces the sample and the carrier gas into the TC combustion tube 36 filled with an oxidation catalyst that converts the carbon component in the sample into CO ₂ and converts the nitrogen component into NO, and the TC combustion tube 36. The TC sample injection unit 34 and a heating furnace 38 for heating the TC combustion tube 36 are configured. The downstream portion of the TC combustion pipe 36 is connected to an infrared gas analysis unit 46 that detects CO ₂ through a dehumidifier that removes moisture and a dehumidification / gas treatment unit 44 that includes a halogen scrubber that removes halogen components. . The downstream part of the infrared gas analyzer 46 is connected to a chemiluminescence analyzer 48 that detects NO. Ozone is supplied from the ozone generator 50 to the chemiluminescence analyzer 48. A downstream portion of the chemiluminescence analysis unit 48 is connected to a drain outlet 54 via an ozone killer 52.

The sample injection mechanism 18, the TC oxidation reaction unit 32, the gas purification / flow rate control unit 40, the infrared gas analysis unit 46, and the chemiluminescence analysis unit 48 constitute an analysis unit.
The output of the infrared gas analysis unit 46 and the output of the chemiluminescence analysis unit 48 are input to the calculation unit 56. The operation unit 56 is connected to an operation control unit 58 that controls the operations of the 8-port valve 14 and the microsyringe 16 and the detector sensitivities of the infrared gas analysis unit 46 and the chemiluminescence analysis unit 48. A keyboard 60 and a recorder 62 are connected to the calculation unit 56.

  A display device 100 shown in FIG. 2 to be described later is connected to the calculation unit 56 and the operation control unit 58.

  Next, the measurement operation will be described with reference to FIG.

(TC measurement and TN measurement)
Switching of the 8-port valve 14 and the operation of the microsyringe 16 are performed by a control signal from the operation control unit 58. First, the microsyringe 16 is connected to the branch part 3, and a certain amount of sample is collected in the microsyringe 16. When a predetermined dilution rate is set, the microsyringe 16 is connected to the pure water 24 and a predetermined amount of pure water is added to the sample in the microsyringe 16. Next, the sample of the microsyringe 16 is injected into the TC combustion pipe 36 through the TC sample injection port 34 of the TC oxidation reaction unit 32, and the carbon component in the sample is converted into CO ₂ and the nitrogen component is converted into NO. . The CO ₂ and NO generated in the TC combustion pipe 36 are sent to the dehumidification / gas processing unit 44 together with the carrier gas supplied from the gas purification / flow rate control unit 40 via the flow path 41b, and are cooled, dehumidified and halogen-removed. Thereafter, CO ₂ is detected by the infrared gas analyzer 46, and subsequently NO is detected by the chemiluminescence analyzer 48. Those detection signals are sent to the calculation unit 56, the peak value or the peak area is obtained from the signal, and the TC concentration and the TN concentration are obtained based on the calibration curve data. The obtained TC concentration and TN concentration are sent to the display device 100 together with data such as sample injection amount, dilution rate, measurement date and time.

(IC measurement and TOC measurement)
A certain amount of sample is collected in the microsyringe 16 in the same manner as in TC measurement and TN measurement. When a predetermined dilution rate is set, the microsyringe 16 is connected to the pure water 24 and a predetermined amount of pure water is added to the sample in the microsyringe 16. Next, the microsyringe 16 is connected to the acid 20 and a small amount of acid is added to the sample in the microsyringe 16. Next, the microsyringe 16 is connected to the TC sample inlet 34, and the sparge gas is supplied from the gas purification / flow rate control unit 40 to the microsyringe 16 through the flow path 41 a. The CO ₂ generated from the IC in the sample is sent to the dehumidification / gas processing unit 44 together with the sparge gas, cooled, dehumidified, and halogen-removed, and then the infrared gas analysis unit 46 detects the CO ₂ . The detection signal is sent to the calculation unit 56, and the IC concentration is obtained from the signal. The calculation unit 56 determines the TOC concentration from the difference between the TC concentration and the IC concentration.

The TOC concentration can also be measured alone. A certain amount of sample is collected in the microsyringe 16 in the same manner as in TC measurement and TN measurement. When a predetermined dilution rate is set, the microsyringe 16 is connected to the pure water 24 and a predetermined amount of pure water is added to the sample in the microsyringe 16. Next, the microsyringe 16 is connected to the acid 20 and a small amount of acid is added to the sample in the microsyringe 16. Next, the microsyringe 16 is connected to the drain outlet 28, and the sparge gas is supplied to the microsyringe 16 from the gas purification / flow rate control unit 40 through the flow path 41 a. CO ₂ generated from the IC in the sample is discharged from the drain outlet 28 together with the sparge gas, and the TOC remains in the microsyringe 16. Thereafter, samples of the microsyringe 16 is injected into the TC combustion tube 36 via the TC sample injection port 34 of the TC oxidative reaction part 32, the carbon component in the sample is converted to CO _2, CO ₂ generated by the TC combustion tube 36 Is sent to the infrared gas analysis unit 46 through the dehumidification / gas processing unit 44 together with the carrier gas, and TOC is detected as CO ₂ .

  The display device 100 has a configuration as shown in FIG. A liquid crystal display device (LCD) 102 with a touch panel is provided as a display element. In order to control screen display on the LCD 102, a liquid crystal controller (LCD controller) 104 is connected to the LCD 102. The LCD controller 104 configures a screen to be displayed on the LCD 102 and controls screen display on the LCD 102. In addition to the data screen for displaying the detection result by the analysis unit, the screen includes at least a contrast adjustment screen having four buttons including buttons for adjusting the contrast of the screen at the four corners of the rectangular screen. It is out. The screen display example shown in FIG. 3 to be described later shows a contrast adjustment screen including a data screen showing measurement results and four buttons 108a, 108b, 110, and 112 displayed thereon.

  The image data used by the LCD controller 104 to configure the screen displayed on the LCD 102 is stored in the storage device in the screen control unit 114 by the screen control unit 114, and the LCD controller 104 reads out the image data to display the LCD 102. Configure the screen to be displayed. However, the image data may be stored in the storage device in the LCD controller 104 by providing the storage device in the LCD controller 104.

  In order to recognize the touched position of the touch panel of the LCD 102, a touch panel controller 108 is connected to the LCD 102.

  A contrast adjustment circuit 116 is provided to adjust the contrast of the display screen of the liquid crystal display device. When performing a normal display operation such as display of measurement data, the contrast adjustment circuit 116 adjusts the contrast of the display screen according to the contrast adjustment value stored in the contrast adjustment value storage memory 115. When the contrast adjustment button 108a or 108b is pressed and the contrast adjustment operation is performed, the contrast of the display screen of the liquid crystal display device is adjusted in accordance with an instruction from the screen control unit 114 in the display control unit 110.

  A display control unit 110 is connected to the LCD controller 104 and the touch panel controller 108. The display control unit 110 captures a signal from the touch panel controller 108, and when a person touches the LCD 102 for a predetermined time or more in a state where only a screen other than the contrast adjustment screen is displayed, the currently displayed screen Display the contrast adjustment screen on top. How long the fixed time is to be set can be set as appropriate, and is not particularly limited, but is, for example, 5 seconds. Further, when a person touches the button 108a or 108b for adjusting the contrast among the four buttons 108a, 108b, 110 and 112 when the contrast adjustment screen is displayed, the button 108a or 108b is instructed. Adjust the contrast. When the contrast adjustment is completed, the display control unit 110 stores the contrast adjustment value in the contrast adjustment value storage memory 115.

  The contrast adjustment value storage memory 115 is provided in the screen control unit 114 in this embodiment. However, the contrast adjustment value storage memory 115 may be provided in the LCD controller 104 or the device-side control units 56 and 58, or may be provided as another storage device independent of those parts.

  The display control unit 110 is connected to the calculation unit 26 and the operation control unit 58.

  The display control unit 110 can be configured as a single element, and when the LCD controller 104 and the touch panel controller 108 are realized by a CPU or a microprocessor, the display control unit 110 can also be realized by the CPU or the microprocessor. In addition, the display control unit 110 can be provided in the calculation unit 56 or the operation control unit 58. The contrast adjustment circuit 116 may be configured by hardware, or may be realized by a CPU or a microprocessor that is used alone or in common with other parts.

  The display control unit 110 includes an input unit 112 and a screen control unit 114. The input unit 112 inputs position information recognized by the touch panel controller 108 when a person touches the touch panel, and sends it to the screen control unit 114.

  When only the screen other than the contrast adjustment screen is displayed, the screen control unit 114 indicates that a person is continuously touching the touch panel for a certain period of time or more based on information sent from the input unit 112. If recognized, the LCD controller 104 is instructed to display a contrast adjustment screen on the LCD 102. The screen controller 114 also adjusts the contrast of the four buttons 108a, 108b, 110, and 112 from the information sent from the input unit 112 when the contrast adjustment screen is displayed. Alternatively, when it is recognized that a person is touching 108b, contrast adjustment is performed by an instruction of the button 108a or 108b.

  An example of the contrast adjustment screen displayed on the display screen of the LCD 102 is shown in FIG. The background of the display screen is a data screen showing the measurement result during measurement that was currently being displayed. In this example, total carbon (TC) is measured, and the TC measurement value for each measurement time is displayed as a peak. When the touch panel of the LCD 102 is touched by a person for a certain time (for example, 5 seconds) or longer during the display of the data screen, the contrast adjustment screen of FIG. 3 is displayed on the data screen. In this embodiment, the contrast adjustment screen is composed of four buttons 108a, 108b, 110 and 112 arranged at the four corners of the display screen. The size of each of the buttons 108a, 108b, 110, and 112 is not particularly limited, but is preferably larger from the viewpoint of operability. Since the background screen must be visible for contrast adjustment, there is an appropriate size. The appropriate size is that the vertical size of each of the buttons 108a, 108b, 110 and 112 is 1/4 to 1/3 of the vertical size of the display screen of the liquid crystal display device, and the horizontal size of the button is the horizontal size of the same display screen. Of about 1/5 to 1/3.

The meanings of the four buttons 108a, 108b, 110, and 112 on the contrast adjustment screen are as follows.
“Contrast and Δ”: Brighten the contrast.
“Contrast and ▽”: Darken the contrast.
“OK”: Apply the contrast adjustment value, save it in the contrast adjustment value storage memory 115, and end the adjustment.
“Cancel”: The adjustment value is returned to the state before the adjustment, and the adjustment is finished.

  The operation of the display device 100 will be described with reference to the flowchart of FIG.

  During the measurement operation, the LCD 102 displays a screen for displaying the measurement result (for example, one displayed on the background of FIG. 3).

  When the user touches the LCD 102, the touch panel controller 108 reads a touch panel signal and notifies the input unit 112. The input unit 112 notifies the screen control unit 114 to display a contrast adjustment screen when it is determined from the information of the touch panel controller 108 that the user has been touched continuously for a predetermined time, for example, 5 seconds or more. .

  The screen control unit 114 displays a contrast adjustment button. (See Figure 3.)

  When the user touches the displayed contrast adjustment button position, the touch panel controller 108 reads a signal on the touch panel and notifies the input unit 112 of the signal.

  The input unit 112 acquires the touched position from the information of the touch panel controller 108 and notifies the screen control unit 114 of the touched position.

  The screen control unit 114 determines the contents of the button from the notified position, and notifies the contrast adjustment circuit 116 of necessary information in the case of the upward button 108a or the downward button 108b for contrast adjustment. The contrast adjustment circuit 116 adjusts the contrast so that the contrast is increased in the case of an instruction from the up button 108a and the contrast is decreased in the case of the down button 108b.

  When the “OK” button is pressed, the screen control unit 114 receives the signal from the touch panel controller 108 via the input unit 112, and stores the contrast adjustment value at that time in the contrast adjustment value storage memory of the screen control unit 114. As a result, the contrast adjustment value stored in the contrast adjustment value storage memory is updated, and the contrast adjustment circuit 116 maintains the contrast of the LCD 102 based on the updated contrast adjustment value. The screen control unit 114 erases the contrast adjustment screen (button display) through the LCD controller 104.

  When the “Cancel” button is pressed during contrast adjustment, the screen control unit 114 receives the signal from the touch panel controller 108 via the input unit 112 and the contrast stored in the contrast adjustment value storage memory 115 of the screen control unit 114. The adjustment value (contrast adjustment value that has not been updated) is notified to the contrast adjustment circuit 116, and the screen control unit 114 turns off the contrast adjustment screen through the LCD controller 104. In this case, even during contrast adjustment, the contrast value being adjusted is canceled without being stored in the contrast adjustment value storage memory 115.

  FIG. 5 is a schematic configuration diagram of a TN / TP meter according to another embodiment of the analyzer of the present invention.

  The reagent supply mechanism 202 that also serves as the sample water supply mechanism measures and collects a certain amount of sample water and reagent, supplies them to the reactor 204 that is an oxidation reaction unit, and absorbs the sample oxidized in the reactor 204 by an absorbance measurement unit. It is for leading to the measuring cell 206a of 206. The absorbance measuring unit 206 measures the absorbance of the oxidized sample water.

  The reactor 204 irradiates the aqueous sample to which the potassium peroxodisulfate solution 232 is added with ultraviolet rays or heats it to cause an oxidation reaction, thereby converting the nitrogen compound and the phosphorus compound in the sample water to nitrate ions and phosphate ions, respectively. Oxidative decomposition.

  The reagent supply mechanism 202 includes 8-port valves 208 and 210 having a common port and a plurality of distribution ports, and a syringe pump 212 connected to the common port of the 8-port valve 208. The common port is connected to one distribution port of the 8-port valve 208 via the communication pipe 214.

  Added to each distribution port of the 8-port valve 208 to supply a reagent, a channel connected to sodium hydroxide (NaOH) 231, a channel connected to potassium peroxodisulfate solution 232, and a pH value to be adjusted A flow path connected to hydrochloric acid 233, a flow path connected to sulfuric acid 234, a flow path connected to ammonium molybdate solution 235, and a flow path connected to L-ascorbic acid solution 236 are connected, respectively, and the remaining one distribution port is a gas inlet / It is open to the atmosphere as a discharge channel.

  In each distribution port of the 8-port valve 210, an online sample flow path for collecting a sample online from a plant, an offline sample flow path for collecting a sample from a sample container, and a calibration liquid 237 are provided. , A channel connected to the reaction unit 204, a channel connected to the dilution water 238, and a channel connected to the measurement cell 206a of the absorbance measurement unit 206 are connected, and the remaining ports are drain ports.

  The 8-port valves 208 and 210 are driven by a pulse motor (not shown) whose operation is controlled by the control unit 224, so that any one of the respective distribution ports is connected to a common port of each 8-port valve. The

  The control unit 224 inputs the output of the absorbance measurement unit 206 and calculates the TN concentration and the TP concentration. The control unit 224 controls the operations of the 8-port valves 208 and 210 and the syringe pump 212. In addition to the display device 225, a keyboard, a recorder, and the like (not shown) are connected to the control unit 224.

  The control unit 224 includes an operation control unit and a calculation unit according to the present invention, and corresponds to a unit including the operation control unit 28 and the calculation unit 56 in the embodiment of FIG. The control unit 224 may be a dedicated computer for the TN / TP meter, or may be realized by connecting a general-purpose personal computer.

  In this TN / TP meter, during the measurement of total nitrogen, all nitrogen compounds such as nitrate ion, nitrite ion, ammonium ion or organic nitrogen present in the sample water are alkaline peroxo which is an oxidizing agent as a reagent in the sample water. Potassium disulfate solution is added and converted to nitrate ions in the reactor 204 by UV irradiation or by heating at 120 ° C. for 30 minutes. The sample oxidized in the reactor 204 has its pH adjusted to 2 to 3, and the nitrate ion concentration is measured by ultraviolet absorbance at a wavelength of 220 nm in the measurement cell 206a of the absorbance measurement unit 206.

  In this TN / TP meter, when measuring all phosphorus, all phosphorus compounds are changed to phosphate ions. Therefore, in order to change hydrolyzable phosphorus and organic phosphorus other than phosphate ions present in the sample water into phosphate ions, a potassium peroxodisulfate solution as an oxidizing agent is added as a reagent in a neutral state, and the reactor 204 In this case, it is converted into phosphate ions by irradiation with ultraviolet rays or by heating at 120 ° C. for 30 minutes. Since phosphate ions do not have specific light absorption, an ammonium molybdate solution and an L-ascorbic acid solution, which are color formers, are added as reagents to the sample solution after cooling to cause color development, and the measurement cell of the absorbance measurement unit 206 At 206a, the phosphate ion concentration is measured by the absorbance at a wavelength of 880 nm.

  In this TN / TP meter, the organic pollutant concentration in the sample water can also be measured. At the time of measuring organic pollutants, the sample water is guided to the measurement cell 206a of the absorbance measurement unit 206 without passing through the reactor 204. That is, the sample water is not subjected to oxidation treatment, and the organic pollutant concentration is measured by the absorbance at a predetermined wavelength, for example, around 220 nm in the measurement cell 206a.

  Also in this TN / TP meter, the display device 225 has the same configuration as the display device 100 shown in FIG. 2, and the operation is also the same.

18 Sample injection mechanism 32 TC oxidation reaction unit 40 Gas purification / flow rate control unit 46 Infrared gas analysis unit 48 Chemiluminescence analysis unit 56 Calculation unit 58 Operation control unit 100,225 Display device 102 LCD
104 LCD controller 110 Display control unit 112 Input unit 114 Screen control unit 115 Contrast adjustment value storage memory 116 Contrast adjustment circuit 204 Reactor 206 Absorbance measurement unit 206a Measurement cell 224 Control unit

Claims (2)

An analysis unit including at least a sample introduction unit and a detection unit for detecting a component in the sample introduced from the sample introduction unit;
An operation control unit for controlling the operation of the analysis unit;
A liquid crystal display device with a touch panel;
A liquid crystal controller that configures a screen to be displayed on the liquid crystal display device and executes screen display on the liquid crystal display device; and
A touch panel controller for recognizing a touched position of the touch panel;
A contrast adjustment value storage memory for storing the adjusted contrast adjustment value;
In addition to the data screen indicating the detection result by the analysis unit on the liquid crystal display device via the liquid crystal controller, four buttons including buttons for adjusting the contrast of the screen are provided at four corners of the rectangular screen. At least a contrast adjustment screen is displayed, a signal from the touch panel controller is captured, and a person touches the touch panel continuously for a predetermined time or more while only a screen other than the contrast adjustment screen is displayed. When the contrast adjustment screen is displayed on the screen that is currently displayed, and when a person touches a button for adjusting the contrast among the four buttons when the contrast adjustment screen is displayed Adjust the contrast by instructing the button, and adjust the contrast adjustment value. A display control unit for storing the contrast adjustment value storage memory,
An analysis apparatus comprising: a contrast adjustment circuit that adjusts a contrast of a display screen of the liquid crystal display device in accordance with a contrast adjustment value stored in a contrast adjustment value storage memory or an instruction from the display control unit.   The vertical size of the button is 1/4 to 1/3 of the vertical size of the display screen of the liquid crystal display device, and the horizontal size of the button is 1/5 to 1/3 of the horizontal size of the display screen. The analyzer described in 1.