Section 6

5.Select an analog Input Channel (e.g., channel 1, 2, 3, or, flow, etc.) to assign to that output. Press CHANGE CHOICE to cycle through the channel names. When the desired channel is displayed, press ACCEPT.

11:00 AM 21 - APR - 01

4–20 mA OUTPUTS

 

 

 

CHANGE

ACCEPT

 

 

CHOICE

 

INPUT CHANNEL:

 

 

 

FLOW

 

 

CANCEL

 

 

 

 

 

 

 

 

SELECT APPROPRIATE UNITS

 

 

 

 

 

 

6.Assign a channel value to the 4 mA current value. This value is typically 0, however any value can be set. Enter the value of the input needed to generate 4 mA of current at the output.

11:00 AM 21 - APR - 01

4–20 mA OUTPUTS

ACCEPT

 

 

 

 

4 mA INPUT VALUE

 

 

CLEAR

0.00 mgd

 

CANCEL

ENTRY

 

 

 

 

 

 

 

 

SELECT APPROPRIATE UNITS

 

 

 

 

 

 

7.Assign an input value to the 20 mA current level.

8.Repeat this process to configure the other 4–20 mA output.

6.3.3 4–20 mA Calibration

After wiring the 4–20 mA connection perform a 4–20 mA output calibration. The 4–20 mA output calibration requires a digital multimeter or access to the 4–20 mA current loop wiring. Two 4–20 mA outputs are available and are designated Output A and Output B. Both outputs are calibrated the same way and are isolated from each other.

Calibration may be performed while the 4–20 mA device is in the current loop, as shown in Figure 24 or disconnected from the current loop as shown in Figure 25. In either case, the multimeter must be set to a 20 milliamp dc range or greater.

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

CALIBRATION > 4–20 mA OUTPUTS.

2.Connect a multimeter to the 4–20 mA current outputs per Figure 24 and Figure 25.

3.Make sure that the 4–20 mA output is enabled. If it is not enabled, press CHANGE CHOICE so that the display shows Enabled and press ACCEPT.

4.Select the output (A or B) to calibrate.

5.Press any key to set the selected output to 4.00 mA dc.

6.Measure the current on the selected output using the multimeter and enter the measured value using the numeric keypad. Press ACCEPT.

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4–20 mA Option

8990cm.fm

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Hach 900 MAX manual 3 4-20 mA Calibration, MA Input Value, 00 mgd
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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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