Section 5

5.4.3Dissolved Oxygen Probe Temperature Programming

1.From the Main Menu, select OPTIONS>ADVANCED OPTIONS>DATALOG

2.Highlight Select Inputs using the UP and DOWN keys and press SELECT.

3.Highlight D.O. Temp. using the UP and DOWN keys, then press SELECT.

4.Cycle between Logged and Not Logged, then press ACCEPT.

5.Enter a logging interval using the numeric keypad, then press ACCEPT. Valid logging intervals are shown on the status bar.

6.Select temperature units (°C, °F) using CHANGE CHOICE. Press ACCEPT.

5.4.4Dissolved Oxygen Probe Calibration

The Dissolved Oxygen Probe is shipped without an electrolyte or membrane installed. Install these items before initial use.

1.Connect a suitable power supply to the sampler, and power up the unit by pressing the ON button.

Note: The membrane of a charged sensor must be kept moist. If the membrane is allowed to dry completely, the electrolyte film between the membrane and the platinum will evaporate, destabilizing the sensor. If the sensor will be out of water for more than 30 minutes, put a small amount of water in the silicon soaking cap, and install it over the protective guard. Lift the edge of the cap to break the seal as it is being removed. This will prevent a vacuum from forming inside the soaking cap while it is being removed which can result in the membrane becoming stretched.

2.From the Main Menu, select OPTIONS > ADVANCED OPTIONS >

CALIBRATION > DO.

3.Enter the ambient air temperature (the current reading is displayed for reference) using the numeric keypad.

4.Enter the elevation above sea level for the specific location.

5.Enter the membrane thickness. The operation of the sampler will be affected by membrane thickness for the oxygen sensor.

For general purpose applications, the 1-Mil membrane is standard. This membrane allows measurements in the 0 to 20 ppm range of dissolved oxygen and provides the best response time and durability.

The 2-Mil membrane can be used to measure up to 40 ppm dissolved oxygen. Its increased thickness slows the response time of the sensor, but this membrane has increased resistance to cuts and tears. For this reason, it is recommended for use in wastewater aeration basins where solids in the water are in rapid motion.

6.Enter the chlorinity (salinity) of the flow stream (typical wastewater is zero, sea water is higher).

7.Place the D.O. probe in open air and press any key. The sampler will wait for the reading to stabilize before storing the calibration value. The screen will automatically return to the calibration menu.

Calibrating the D.O. Temperature

1.Place the probe and the thermometer in a liquid.

2.Wait for the temperature reading to stabilize.

3.Enter the actual temperature of the liquid.

 

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Dissolved Oxygen Probe

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Hach 900 MAX manual Dissolved Oxygen Probe Temperature Programming, Dissolved Oxygen Probe Calibration
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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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