CRIUS® Controller

Capable of managing your chemical feed applications and much more
Simple – Intuitive Programming
Superior Functionality

Highest Quality – Low Cost – Superior Functionality

CRIUS®  is an attractively priced, top of the range instrument controller. Optional communications packages allow Profibus, Modbus ASCII, Modbus RTU, Modbus TCP and others.

The CRIUS® is equipped with the capability to connect up to four sensors of any type with appropriate analog outputs and relays. Four sensors not enough? Simply connect up to 4 CRIUS® together all using the same display and communications. Equipped with data-logging as standard and multiple PID loops as options, the CRIUS® is able to control complex water treatment processes at a fraction of the cost of other controllers.

With all users having their own log on, and with three levels of instrument and remote access security, you can use the CRIUS® with all of its superior functionality with confidence.

A Water 4.0 and Industry 4.0 Controller

The phrases ‘Water 4.0’, ‘Industry 4.0’, ‘Internet of Things’ and ‘SMART and DIGITAL’ are now commonly heard but what do they mean and where does EquipSolutions fit in?

Industry 4.0 relates to the concept that we are living through a 4th Industrial Revolution where factories will be as SMART as they can be. The main principles are based on:

  • Interoperability
  • Information Transparency
  • Technical Assistance
  • Decentralization

Water 4.0 is how this technology and philosophy will be implemented/will affect the water industry. The Internet of Things refers to all devices we use all the time talking to each other and making their own decisions.

It is generally accepted that SMART refers to the increasing sophistication of equipment to make decentralized decisions, so it is this technology that allows for the implementation of Industry 4.0 or Water 4.0, and DIGITAL refers to its communications capability. For example, in 1990 a chlorine analyzer measured chlorine in water, gave out a 4-20mA output proportional to the chlorine and a couple of relays.

The CRIUS® HaloSense (fully Water 4.0 developed) can provide the 4-20mA output and relays, and has multiple digital communications options (interoperability), has space for up to 16 sensors (information transparency), has wireless and wired internet access (technical assistance) and full PID capability with remote setpoint, i.e. another device can set the setpoint (decentralization). Watch a 2 minute video about EquipSolutions' CRIUS® controller above.

  • Low cost per point
  • Process control options
  • Remote access options
  • Stable, reliable, accurate sensors

Multi-channel online analyzers from EquipSolutions all maintain their level of functionality and include:

  • 4-20mA outputs
  • Assignable relay outputs
  • Intuitive menus
  • Text alarms to your cell phone
  • High resolution displays
  • Graphing and datalogging
  • 9 buttons for easy navigation
  • Enclosure; wall, panel, pipe or pole mounting. IP65/NEMA 4x.

 


CRIUS®

Highest Quality – Low Cost Multi-Parameter Analyzer

The CRIUS® offers more sensor connections, more functionality and more flexibility with a color screen and optional built in 3G modem. The CRIUS® is an attractively priced, top of the range instrument controller. Optional communications packages allow Profibus, Modbus ASCII, Modbus RTU, Modbus TCP and others.

The CRIUS® is equipped with the capability to connect up to four sensors of any type with appropriate analog outputs and relays. Four sensors not enough? Simply connect up to 4 CRIUS® together all using the same display and communications. Equipped with datalogging as standard and multiple PID loops as options, the CRIUS® is able to control complex water treatment processes at a fraction of the cost of other controllers.

The CRIUS® can also come in a multitude of languages making it suitable for use in any market.


Water 4.0 and Industry 4.0 Controllers

The phrases ‘Water 4.0’, ‘Industry 4.0’, ‘Internet of Things’ and ‘SMART and DIGITAL’ are now commonly heard but what do they mean and where does EquipSolutions fit in?

Industry 4.0 relates to the concept that we are living through a 4th Industrial Revolution where factories will be as SMART as they can be. The main principles are based on:

  • Interoperability
  • Information Transparency
  • Technical Assistance
  • Decentralization

Water 4.0 is how this technology and philosophy will be implemented/will affect the water industry. The Internet of Things refers to all devices we use all the time talking to each other and making their own decisions.

It is generally accepted that SMART refers to the increasing sophistication of equipment to make decentralized decisions, so it is this technology that allows for the implementation of Industry 4.0 or Water 4.0, and DIGITAL refers to its communications capability. For example, in 1990 a chlorine analyzer measured chlorine in water, gave out a 4-20mA output proportional to the chlorine and a couple of relays.

Today, the CRIUS HaloSense (fully Water 4.0 developed) can provide the 4-20mA output and relays, but also has multiple digital communications options (interoperability), has space for up to 16 sensors (information transparency), has wireless and wired internet access (technical assistance) and full PID capability with remote setpoint, i.e. another device can set the setpoint (decentralization).

The CRIUS® is currently used in a multitude of applications including: Water Treatment for the control of, for example, Cooling Towers where the online biofilm control of the BioSense and the remote access capability is bringing solutions to our customers’ water treatment requirements.

The CRIUS® is preferred in the Swimming Pools market, where the superior control and sensor capability provides for better quality bathing water. Again the remote access is proving essential to our customers along with the Variable Speed Drive (VSD) control which is massively reducing electricity usage and CO2 emissions (and reduces the electric bills!).

In the municipal drinking water market, the superior control capability is making it the controller of choice for areas like coagulation control with the superior sensors in use particularly for chlorine control and dissolved oxygen control.

Summary of Applications

  • Water Treatment
  • Drinking Water
  • Waste Water
  • Pool and Spa Control
  • Industrial Water
  • Food and Drink
  • Paper and Pulp

The CRIUS® can also come in a multitude of languages making it suitable for use in any market.

Small Water Treatment Plant Monitoring for Chlorine, pH and Turbidity

Small water treatment plants, secondary disinfection plants etc. tend to suffer from similar problems wherever they are in the world. The first is lack of communications SCADA infrastructure, the cost of which to install can be prohibitive. The second is the lack of a central DCS control infrastructure, again the installation of which can be cost prohibitive. The third is the remote location. Often these water treatment plants are in remote and difficult to access locations.

With these three issues facing many water engineers around the world, a low cost solution providing solutions to all three issues is available from EquipSolutions. A CRIUS® controller has the on board capacity to provide small scale SCADA, and full online PID control while the sensors (e.g. chlorine, pH, Turbidity etc.) are suitable for long term operation without operator intervention.

To hear more about other customers using the CRIUS® multiparameter controllers in a similar way contact us.

Document Type Size
CRIUS® Controller Datasheet Brochure 154B
EQS Container Building Case Study Brochure 715kB
EQS Poultry Processing Case Study Brochure 305kB
HaoloSense Technical Note 155kB
ORPSense Technical Note 171kB
OxySense Technical Note 218kB
PeraSense Technical Note 208kB
Peracetic Acid (PAA) Technical Note 317kB
pHSense Technical Note 206kB
SoliSense Technical Note 190kB
TurbSense Technical Note 244KB

Focus Ons are a series of short articles distributed by email providing technical information regarding instrumentation, process measurement in potable, waste, process and pool waters. If you would like to join the mailing list, please contact us.

Focus On... Water 4.0, Industry 4.0, IoT, SMART and DIGITAL

You’ve probably heard the phrases ‘Water 4.0’, ‘Industry 4.0’, ‘Internet of Things’ and ‘SMART and DIGITAL’ but did you know that…

So what is Industry 4.0 (and Water 4.0 and the Internet of Things and SMART and DIGITAL technology)?

Simply put the concept is that we are currently living through the 4th Industrial Revolution.

The first was mechanization, (what we currently think of as the Industrial Revolution), so steam engines, Spinning Jennies, railways, canals and factories in the 1800’s.

The second was the age of mass production so; electricity, the production line, etc., largely in the first half of the 20th century.

The third was computers and automation, in the latter part of the 20th century, and the fourth?

The fourth (Industry 4.0) is about ‘SMART’ factories. (The original use of the expression Industry 4.0 was by a group of advisors to the German government who presented their advice in 2012). Industry 4.0 is about making factories as SMART as they can be. That is having assets (machines, people, robots, AI, cyber technology etc.) all communicating with each other.

The main principles put forward were based on;

  • Interoperability – everything should be able to talk to everything else.
  • Information Transparency – the physical world should be able to be recreated virtually to allow for testing and modelling.
  • Technical Assistance – information should be presented in a way that supports people to make good and fast decisions.
  • Decentralization – after decades of centralization to things like DCS systems and SCADA systems, the future is to enable as many decisions as possible to be made locally by whatever intelligence (human or machine) is available.
So what is Water 4.0 and SMART and DIGITAL?

Water 4.0 is simply how this technology and philosophy will be implemented/will affect the water industry. There are some clear outcomes from the above… more sensors… more modelling… ‘SMARTER’ instruments, controllers, pumps etc..

SMART and DIGITAL.

These terms aren’t quite as well defined as others. Generally it is accepted that SMART is the increasing sophistication of equipment to make decentralised decisions. For example, in 1990 a chlorine analyzer measured chlorine in water, gave out a 4-20mA output proportional to the chlorine and a couple of relays.

Today, the CRIUS® HaloSense (fully Water 4.0 developed) can provide the 4-20mA output and the relays, and also has multiple digital communications options (INTEROPERABILITY), has space for up to 16 sensors (INFORMATION TRANSPARENCY), has wireless and wired internet access (TECHNICAL ASSISTANCE) and full PID capability with remote setpoint, i.e. another device can set the setpoint (DECENTRALIZATION). So SMART technology is the technology that allows for the implementation of Industry 4.0 or Water 4.0. DIGITAL tends to refer to the communications capability.

So what is the Internet of Things or IoT?

When the previous Industrial Revolutions happened, the technology and concepts spilled over into the consumer world from the business/manufacturing world. With Industry 4.0 it is beginning to be the other way around with consumer demand for the internet, and mobile phone technology, driving the technology. If we assume that in this Industrial Revolution the same thing will happen, then the Internet of Things refers to all devices we use all the time talking to each other and making their own decisions.

Imagine your mobile phone waking you at 6am and telling your kettle that turns itself on at 6.20am, which tells your car that starts itself and defrosts the windshield at 6.30am etc., etc..

Not convinced that we are in a new Industrial Revolution?

Consider this…… perhaps Industrial Revolutions are only identifiable in hindsight?

And what does it matter? Well from EquipSolutions’ point of view, it doesn’t. As long as our products are leading the way in providing our customers with what they need to enable their own Industry 4.0.


EquipSolutions' New Controllers - Top Ten Innovations

If you have used a EquipSolutions controller you will know that they give you unrivalled control options but did you know that EquipSolutions' new controllers also offer individual security for up to 20 named individuals?

EquipSolutions' controllers have always given flexibility but did you know that EquipSolutions' new controllers can accommodate up to 16 sensors of any description?

This Focus On describes the 10 most popular innovations to be found in EquipSolutions' new CRIUS®.

No. 1 – Human readable service log

The CRIUS® analyzer/controller has a downloadable human readable service log – giving an entire history of the instrument including current settings, calibrations etc. Provides a great snapshot of how an engineer left an instrument.

No. 2 – Cloning facility

Ever had to set up many instruments with the same settings? Simply set up one and copy it to others!

No. 3 – On screen wiring diagrams

Lost the manual or can’t be bothered to find it? EquipSolutions' analyzers have the answer!

No. 4 – Want a bit more info on what’s going on with a sensor?

EquipSolutions' new sensor maintenance pages are just for you then! Detailed information about all aspects of the signal coming off the sensor clearly available.

No. 5 – Instrument datalogs not quite giving you what you need?

EquipSolutions' new look datalogs in CRIUS® (downloadable) let you datalog almost everything, put graphs on the display, datalog the same parameters at more than one interval and a whole lot more. Never has instrument datalogging been so easy and complete.

No. 6 – New enclosure

The new enclosure brings a new level of flexibility being wall mountable, pole and handrail mountable and even flush mountable. Not only that, but it gives you loads of room to work in and there are even spare live, neutral and earth terminals to make wiring relays easier!

No. 7 – Not enough I/O?

Don’t worry, simply daisy chain 4 CRIUS® together and you can use the same display, comms options etc. and increase your I/O fourfold to give up to 16 sensors.

No. 8 – Bored of reading about stuff in manuals that you don’t have?

EquipSolutions' new manuals are customized to each instrument. The manual is ‘built’ to match each individual instrument so the manual only has what you have!

No. 9 – Has the operator been messing with settings they shouldn’t?

No more! With 20 individual user settable logons, you can give people access to what they need and no more.

No. 10 – Control algorithms

EquipSolutions has developed a reputation for developing great control algorithms and this has continued with the new CRIUS® with the introduction of feed forward control algorithms and a master controller which selects the correct control philosophy to use (for use with complex systems such as coagulation control).


Focus On... Remote Access

Small water treatment plants, secondary disinfection plants etc. tend to suffer from similar problems wherever they are in the world. The first is lack of communications SCADA infrastructure, the cost of which to install can be prohibitive. The second is the lack of a central DCS control infrastructure, again the installation of which can be cost prohibitive. The third is the remote location. Often these water treatment plants are in remote and difficult to access locations.

With these three issues facing many water engineers around the world, a low cost solution providing solutions to all three issues is available from EquipSolutions. A CRIUS® controller has the on board capacity to provide small scale SCADA, and full online PID control while the sensors (e.g. chlorine, pH, Turbidity etc.) are suitable for long term operation without operator intervention.

To hear more about other customers using the CRIUS® multiparameter controllers in a similar way contact us.


Focus On... Saving Time and Money with PID

Did you know…

… that PID can save you money by offering better process control
… that PID can help you maintain a setpoint, even with a variable process
… that the days of over complex and confusing PID are over
… that EquipSolutions can tailor a PID system to your exact requirements. You may never have to touch those settings again!

In this Focus On, EquipSolutions would like to introduce you to PID if you haven’t come across it, and discuss some of the useful advanced features of modern PID systems, like on EquipSolutions' CRIUS® models for those more familiar with PID.

Introduction to PID

What is PID?

PID is a mathematical tool created by engineers and is used in controllers. It is a feature often found in industrial controllers and is available in EquipSolutions' controllers, as an inexpensive upgrade.

What is PID for?

The best way to explain what PID does, is to take an example. Most people have been to a swimming pool at some point in their lives, so this is the example we shall use. PID is also applicable in a huge variety of other processes. If you are not sure, you can always contact us to discuss your application.

When a person enters a swimming pool, they create a chlorine demand. They do this by introducing sweat, bacteria, organic molecules and other substances into the pool water. Chlorine reacts with these substances, which results in chlorine being used up and the chlorine level dropping. The chlorine level in this example, is often called the process variable or PV in the context of PID.

In order to maintain a concentration or level of chlorine, more chlorine needs to be dosed. If you dosed the same amount of chlorine per bather, the level would not be stable as all bathers create a different chlorine demand (e.g. swimming for fitness produces more sweat than swimming recreationally). Dosing manually brings in the issue of human error, and how operators approximate or calculate the amount of chlorine to dose based on current levels. Another issue with manual dosing is that it is not a continuous process, meaning it is unlikely a stable level will ever be reached.

What does PID do?

PID takes the measured level of chlorine or the PV and compares it to the desired level or set-point. This comparison gives the error which PID interprets and then calculates an output. The output is an electrical signal which controls the dosing of the appropriate chemical. The output can control heaters, dosing pumps and many other mechanisms that can be used to change the PV.

How is it used?

PID is made up of three parts, proportional, integral and derivative. Understanding what each part does helps operators choose the level of control best suited to them.

Proportional – Is the most commonly used for portion PID and suits most applications. When using proportional control, the further away the measured value is from the setpoint, the larger the output will be from the controller. This is an appropriate level of control for most processes, and users can gain a lot of control from a purely proportional system.

In some systems where the PV is lost to the process, e.g. chlorine from a pool, heat from a boiler etc., the proportional control never quite catches up with the setpoint. Users can see that although the process approaches the setpoint it rarely, if ever, gets to it. This is known as ‘droop’. The user can compensate for droop if the removal of the PV is fairly constant, simply by raising the setpoint, e.g. evaporation of chlorine from an empty pool. If droop changes often, (e.g. bather load or chlorine demand) then to eradicate the ‘droop’ then the integral part of PID can be applied to the signal to correct it.

Integral – The output from the integral term is determined by both the magnitude and the duration of the error. A small error over a long period of time will trigger a larger response than from a purely proportional system. This helps the elimination of the ‘droop’ seen in processes with continuous loss, and also serves to help reach the setpoint quicker.

Derivative – Derivative gain is rarely used and is generally set up only by expert engineers. Derivative gain uses the rate of change in the PV to try and predict future errors. This type of control is particularly susceptible to overcompensating, especially if there is even a small amount of signal noise (usually seen as spikes in the PV). Derivative gain is generally a tweak used by engineers to improve an already tight control, and is almost never used as an essential part of control.

What are the benefits of PID?

When properly set up, PID can lead to far tighter process control, which in turn can save you time and money. As an example, pool managers want to keep chlorine levels low, to improve the bathing experience and also save on chemicals. AquaSense is a chlorine analyzer system that responds quickly and appropriately to a change in bather load (also known as chlorine demand). This means pool operators can save money while maintaining the safety of the pool. PID can also help reduce the risk of overshooting the desired setpoint, reducing the risk of dangerous overdosing of the chemicals.

Advanced Features and Safeguards

While maintaining a setpoint with a PID loop is a huge advance over using threshold relays to maintain an upper and lower limit, it is sensible to control the loop with extra safeguards, such as:

  • Maximum and minimum pump outputs. This is mainly used to prevent the controller from employing too aggressive a control, which can lead to overdosing. A minimum output can also be used in a system where the measured parameter is lost over time, to prevent the controller ever turning the dosing off.
  • Ramp rate is a proportional control that allows users to choose how quickly or slowly the controller doses, in order to reach the setpoint. It is especially useful on startup, and can prevent the controller dosing too quickly.
  • Wind up protection is an integral control, which limits the duration aspect of the control. This puts a limit on how much previous error can accumulate. Without wind up protection, there could be a very large integral value, if the process ever reaches zero or on startup.

These are all standard features in all EquipSolutions PID controllers.

Conclusion

In summary, PID is a very useful tool when used correctly, and can result in significant chemical savings, not to mention reduced pump wear and tear and lower electricity costs.