Section 6

1.Enable one of the alarm conditions.

2.Select an action to occur when the alarm is activated.

3.Set either a High trip point or a Low trip point.

4.After entering the trip point enter the deadband value. The deadband is the area between the alarm “turn on” and “turn off.”

Note: Log rainfall to use an alarm on a rainfall condition; likewise, log flow in order to

 

implement an alarm on a flow rate of change.

Set Point Alarm Conditions:

 

•

Level

•

Cabinet Temperature (refrigerated samplers)

•

Flow

•

Analog Channels 1–3

•

Flow Rate of Change

•

Analog Ch. 4 or D.O.

•

pH

•

Analog Ch. 5 or D.O. Temp.

•

ORP

•

Analog Ch. 6 or Conductivity

•Process Temperature • Analog Ch. 7 or Conductivity Temp.

•Rainfall

Note: Rainfall and Flow Rate of Change alarms are HIGH set point conditions; they take no deadband and they are time dependant.

Deadband

After entering the trip point, enter a deadband value. The deadband is the area between alarm “turn-on” and “turn-off”.

The purpose of setting the deadband is to eliminate alarm chatter which may occur if the “turn-on” and “turn-off” values are too close together. Small fluctuations occurring when the reading is at or near the trip point can rapidly toggle an alarm relay on and off.

In the pH example (Figure 28) the deadband is set to 0.10 pH. When the pH reached 6.9 (lower dashed line), the alarm tripped, but the alarm did not turn off until the pH came back up to 7.00. This difference is the deadband setting which should be set according to the characteristics of the item

being measured.

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Alarm Relays

8990cm.fm

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Image 94
Hach 900 MAX manual Analog Ch or Conductivity, Deadband
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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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