Appendix D

Use the following examples to help you determine the value that you need to enter when programming for sampling based on counts.

Example 1

You want to collect 24 samples over a 24-hour period on a 4–20 mA flow proportional basis.

Average Flow Rate = 3.5 mgd (average flow rate over the 24-hour period) Maximum Flow Rate = 10 mgd

a = 1440 minutes

1.

Calculate Q.

 

 

Q = --Average------------------------Flow---------------Rate-------------

= 3.5----------mgd----------- = 0.35 mgd

 

Maximum Flow Rate

10 mgd

2.

Calculate t.

 

a 1440 min

t = --= ------------------------------ = 60 min/sample

n24 samples

3.Multiply Q x t x 10.

0.35mgd ⋅ 60 min/sample ⋅ 10 = 210

Therefore, the value entered for INTV = _ _ _ _ CNTS is 210.

Example 2

You want to collect 48 samples over a 24-hour period on a 4–20 mA flow proportional basis.

Average Flow Rate = 1.75 mgd (average flow rate over the 24-hour period) Maximum Flow Rate = 3 mgd

a = 1440 minutes

1.

Calculate Q.

 

 

Q = --Average------------------------Flow---------------Rate-------------

= 1.75--------------mgd----------= 0.583 mgd

 

Maximum Flow Rate

3 mgd

2.

Calculate t.

 

a 1440 min

t = --= ------------------------------ = 30 min/sample

n48 samples

3.Multiply Q x t x 10.

0.583 mgd ⋅ 30 min/sample ⋅ 10 = 174.9

Therefore, the value entered for INTV = _ _ _ _ CNTS is 175.

Example 3

You want to collect 96 samples over a 24-hour period on a 4–20 mA flow proportional basis.

Average Flow Rate = 0.52 mgd (average flow rate over the 24-hour period) Maximum Flow Rate = 2 mgd

a = 1440 minutes

1. Calculate Q.

Q = --Average------------------------Flow---------------Rate-------------

= 0.52--------------mgd----------= 0.26 mgd

Maximum Flow Rate

2.0 mgd

 

 

 

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How to Calculate Pulses/Counts

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Hach 900 MAX manual Calculate t
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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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