Section 6

7.Press any key to set the output to 20.00 mA dc.

8.Measure the current on the selected output using the multimeter and enter the measured value using the numeric keypad. Press ACCEPT to complete the calibration.

By entering the measured current values, the microprocessor will electronically adjust the outputs to compensate for the difference between the measured values and the expected values.

Figure 24 Calibration with the Meter in the Loop

 

Chart

Multimeter

 

 

Recorder

 

 

 

 

 

 

 

 

900 MAX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Loop

Figure 25 Calibration with the 4–20 mA Device Disconnected from the Loop

Multimeter

900 MAX

6.4 Alarm Relays

Note: Current to the relay contacts must be limited to 5 amps. A means to remove power from the relays locally in case of an emergency or for servicing the product must be provided by the user. This can be accomplished with an external switch and a 5-amp fuse or with a switched 5-amp circuit breaker.

Four alarm relay outputs are available as a factory installed option. The relays are mounted in an external NEMA 4X enclosure for installation to a wall or panel. Alarm contacts are rated for 10 amps at 240 V ac (resistive load).

The alarm wiring can be sized according to the load being used. The relay connector will accept wire sizes from 18–12 AWG with a rating of 300 V, 80 °C minimum. Do not use wire smaller than 18 AWG.

For relay pin assignments refer to Table 17 and Figure 26.

 

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8990cm.fm

Alarm Relays

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Image 91
Hach 900 MAX manual Alarm Relays, Calibration with the Meter in the Loop
Page 90 Page 92

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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