Appendix B

Graph Manipulation

Table 23 Graphing Functions and Descriptions

Functions Description

Status Bar

Displays the time, date, measured value, and unit of measure at the intersection of the data cursor. Placing the cursor’s data on the status bar eliminates the need for X or Y axis labels and provides a larger graph viewing area.

Moving the Data Cursor with the Arrow Keys

The data cursor appears as a vertical line in the center of the graph. Move the data cursor to the left or right by using the soft keys or the numeric keypad.

Moving the Data Cursor with the Numeric Keypad

The keys 0–9 represent a percentage of full scale. Pressing a numeric key on the keypad while a graph is displayed causes the data cursor to jump to the location on the graph that is represented by that key.

For example, pressing the 0 key moves the data cursor to the far left end or 0% position on the graph. Pressing the 5 key moves the data cursor to the middle or 50% position of the graph. Pressing the 9 key moves the cursor to the 90% position.

Next Channel Soft Key

Graphs data from the next logged channel. For example, if the sampler is logging Level, Flow, and pH and the Level graph is currently displayed, the NEXT CHANNEL key causes the Flow channel to be graphed. Pressing Next Channel again will create a graph for pH channel. Pressing NEXT CHANNEL again returns to the Level graph, selects a time period of interest, and compares different graphs.

Graphic Display Averaging

The sampler can display a graph that consists of a maximum of 180 individual dots. Since a 24-hour period could contain as many as 1440 data points (assuming a one-minute recording interval, one reading each minute) it would be impossible to plot every data point on the graph.

 

When more than three hours (more than 180 minutes worth) of data is

 

graphed, the data points must be averaged. When graphing a partial day of

 

three hours or less, all data points are graphed with no averaging.

 

When viewing a graph with more than 180 data point, zoom in to the area of

 

interest (using the Graph Partial Day option) before all of the individual data

 

points are displayed.

Sample History

 

 

 

Sample History displays a running history of the sampling program. Displays

 

include sampler number, date and time of each sample, the bottle number it

 

was put in, and the results of the sample cycle. Result messages include:

 

 

 

Message

 

Results

 

 

 

Success

 

Sample taken as expected.

 

 

 

No Liquid

 

No liquid was detected at the liquid sampler.

 

 

 

Key Press

 

A key was pressed twice during pumping, canceling that sample.

 

 

 

 

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Programming Features

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Hach 900 MAX Appendix B Graph Manipulation, Graphic Display Averaging, Sample History, Graphing Functions and Descriptions
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900 MAX specifications

The Hach 900 MAX is an advanced analytical instrument designed to perform water quality analysis with precision and efficiency. This multiparameter water quality analyzer is tailored for a wide range of applications, including environmental monitoring, wastewater treatment, and industrial processes. Its unique design and technology make it a valuable tool for professionals in the field.

One of the standout features of the Hach 900 MAX is its ability to measure multiple parameters simultaneously. Equipped with advanced sensors, the device can analyze key water quality indicators such as pH, turbidity, dissolved oxygen, conductivity, and various chemical parameters. This comprehensive measurement capability allows users to gain a complete understanding of water quality in a single run, saving both time and resources.

The Hach 900 MAX utilizes cutting-edge technologies to provide accurate and reliable results. Its integrated optical sensors employ advanced photometry, which enhances the detection of chemicals in water samples with high sensitivity. Additionally, the device includes advanced calibration management tools that ensure consistent accuracy over time. Users can easily perform routine calibrations with minimal effort, facilitating reliable data collection.

Another notable characteristic of the Hach 900 MAX is its user-friendly interface. The instrument features a large, touchscreen display that allows for intuitive navigation through various settings and parameters. Users can quickly access real-time data, generate reports, and analyze trends using the built-in software. The ability to customize dashboards and create visual representations of data enhances user experience and simplifies the decision-making process.

In addition to its analytical capabilities, the Hach 900 MAX emphasizes connectivity and data management. The instrument can be connected to laboratory information management systems (LIMS) and other data networks, enabling smooth data transfer and integration into existing workflows. This connectivity enhances collaboration among team members and facilitates compliance with regulatory requirements.

Durability is another hallmark of the Hach 900 MAX. The device is designed for use in demanding environments, with robust construction and protection against dust and moisture. This reliability ensures that the analyzer remains operational even in challenging conditions, making it suitable for field applications.

Overall, the Hach 900 MAX stands out as a powerful and versatile tool in the realm of water quality analysis. With its multiparameter measurement capabilities, advanced sensor technologies, user-friendly interface, and reliable performance, it enables professionals to obtain accurate insights into water quality efficiently. As environmental concerns continue to grow, instruments like the Hach 900 MAX play a crucial role in ensuring the safety and sustainability of water resources.
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