Friday, September 27, 2019

Field Instruments from Yokogawa and Arjay Automation

Arjay Automation, LLC

Arjay Automation, LLC is a proud partner of Yokogawa Corporation of America. Yokogawa is a leading manufacturer and supplier for the North American market in the fields of automation, measurement, and control. Yokogawa field instrument products includes a complete line of flowmeters, pressure transmitters, differential pressure transmitters, temperature transmitters, level transmitters, Fieldbus instruments and safety measurement instrumentation.

Pressure Transmitters

The accurate and stable measurement of process pressure with Yokogawa Pressure Transmitters supports the safe, reliable, and profitable operation of your plant.

Flow Meters

Yokogawa's range of flow meter instruments include vortex, magnetic, variable area, Coriolis, and differential pressure flow meters.

Temperature Transmitters

Yokogawa offers a full line of temperature transmitters that are head-mounted, panel-mounted, or field-mounted.

Level Meters

Yokogawa has more than 45 years' experience in the development, design, and manufacture of pressure sensors and pressure transmitters. The DPharp series of digital pressure transmitters use a differential pressure high accuracy resonance (DPharp) sensor that represents one of the most revolutionary advances in transmitter technology.


Field Wireless

The flexibility of wireless solutions enables less investment in infrastructure while providing greater insights into plant operations.


Device Smart Communicators

Yokogawa offers a variety of communication protocols; including, FOUNDATION Fieldbus, HART, BRAIN, ISA100, Profibus, and Modbus to help support smart devices in this evolving digital communication technology.

For more information about Yokogawa filed instruments, contact Arjay Automation. Call them at (800) 761-1749 or visit their web site at https://arjaynet.com.

Saturday, August 24, 2019

Yokogawa SMARTDAC+ GX and GP: Navigation Screen Tutorial


The Yokogawa SMARTDAC+ is a fresh approach to data acquisition and control,  with smart and simple touch operation as a design priority. Measure, display and archive process data with greater levels of clarity, intelligence and accessibility. The GX/GO user interface provides:
  • Wide variety of display formats
  • Powerful data search functions
  • Alarm/Status indicator functions
  • Touch screen for intuitive operation
  • Easy-to-navigate, user-oriented design
  • Supports freehand messages
The video above provides a tutorial of the SMARTDAC+ GX and GP Smart User Interface.

For more information about guided wave radar transmitters, contact Arjay Automation. Call them at (800) 761-1749 or visit their web site at https://arjaynet.com.

Tuesday, July 23, 2019

Infrared Suspended Solids Sensor for Cheese Curd Cutting: Getting the Timing Right to Avoid Waste, Save Money

In the making of cheese a coagulant is added to the milk to coagulate the solids creating a curd. At an optimum point of coagulation, cutters are run through the cheese curd releasing whey. There are various ways the cut point is found, some quite sophisticated and some very simple. It can be challenging to get a repeatable cutting point from batch to batch therefore quality can vary resulting in waste and loss of solids.

Quadbeam Technologies manufactures a four beam ratio-metric infra-red, self compensating light attenuation sensor can accurately detect the change in the transmission of light through the curd. This technology can repeatedly identify a predetermined point for optimal cutting.  To read the full application note, visit the link below.




Arjay Automation, LLC
https://arjaynet.com
(800) 761-1749

Saturday, July 6, 2019

The Basics of Pilot Operated Tank Relief Valves


When liquid is pumped in, storage tanks are pressurized and the current tank vapor is compressed. Tanks are also pressurized owing to higher ambient temperatures that cause the vapor of the tank to expand. Pilot operated pressure relief valves are mounted on tanks to mitigate harm caused by these growing tank vapors to avoid structural harm arising from overpressure.

Here is an outstanding animation, courtesy of Cashco, showing how a relief vent operated by a pilot valve protects a storage tank from overpressurizing during a pump-in condition or during rising ambient temperatures.

For more information on pilot operated tank relief valves, contact Arjay Automation at www.arjaynet.com or by calling (800) 761-1749.

Sunday, June 30, 2019

US Power Grids, Oil and Gas Industries, and Risk of Hacking


A report released in June, from the security firm Dragos, describes a worrisome development by a hacker group named, “Xenotime” and at least two dangerous oil and gas intrusions and ongoing reconnaissance on United States power grids.

Multiple ICS (Industrial Control Sectors) sectors now face the XENOTIME threat; this means individual verticals – such as oil and gas, manufacturing, or electric – cannot ignore threats to other ICS entities because they are not specifically targeted.

The Dragos researchers have termed this threat proliferation as the world’s most dangerous cyberthreat since an event in 2017 where Xenotime had caused a serious operational outage at a crucial site in the Middle East.

The fact that concerns cybersecurity experts the most is that this hacking attack was a malware that chose to target the facility safety processes (SIS – safety instrumentation system).

For example, when temperatures in a reactor increase to an unsafe level, an SIS will automatically start a cooling process or immediately close a valve to prevent a safety accident. The SIS safety stems are both hardware and software that combine to protect facilities from life threatening accidents.

At this point, no one is sure who is behind Xenotime. Russia has been connected to one of the critical infrastructure attacks in the Ukraine.  That attack was viewed to be the first hacker related power grid outage.

This is a “Cause for Concern” post that was published by Dragos on June 14, 2019.

“While none of the electric utility targeting events has resulted in a known, successful intrusion into victim organizations to date, the persistent attempts, and expansion in scope is cause for definite concern. XENOTIME has successfully compromised several oil and gas environments which demonstrates its ability to do so in other verticals. Specifically, XENOTIME remains one of only four threats (along with ELECTRUM, Sandworm, and the entities responsible for Stuxnet) to execute a deliberate disruptive or destructive attack.

XENOTIME is the only known entity to specifically target safety instrumented systems (SIS) for disruptive or destructive purposes. Electric utility environments are significantly different from oil and gas operations in several aspects, but electric operations still have safety and protection equipment that could be targeted with similar tradecraft. XENOTIME expressing consistent, direct interest in electric utility operations is a cause for deep concern given this adversary’s willingness to compromise process safety – and thus integrity – to fulfill its mission.

XENOTIME’s expansion to another industry vertical is emblematic of an increasingly hostile industrial threat landscape. Most observed XENOTIME activity focuses on initial information gathering and access operations necessary for follow-on ICS intrusion operations. As seen in long-running state-sponsored intrusions into US, UK, and other electric infrastructure, entities are increasingly interested in the fundamentals of ICS operations and displaying all the hallmarks associated with information and access acquisition necessary to conduct future attacks. While Dragos sees no evidence at this time indicating that XENOTIME (or any other activity group, such as ELECTRUM or ALLANITE) is capable of executing a prolonged disruptive or destructive event on electric utility operations, observed activity strongly signals adversary interest in meeting the prerequisites for doing so.”

Monday, June 24, 2019

Variable Area Flow Meters: An Overview

Variable Area Flow Meter
Variable area flow meters, also referred to as Rotameters, have diverse industrial processing applications that range from simple to sophisticated. The devices are easy to install, require no electrical connection, and provide direct flow rate reading. They provide fail-safe flow rate readings in a wide array of industrial applications.

Developed by German inventor Karl Kueppers in 1908, Rotameters measure the volumetric flow rate of liquids and gases. 

Important elements of a variable area flow meter include the tube and the float. Their operation is simple. The tube is fixed vertically and the fluid is fed from the bottom. It travels upward and exits from the top. The float remains at the bottom when no liquid is present and rises upward when fluid enters the tube. 

The float inside the tube moves in proportion to the rate of fluid flow and the area between the tube wall and the float. When the float moves upward, the area increases while the differential pressure decreases. A stable position is reached when the upward force exerted by the fluid is equal to the weight of the float. A scale mounted on the tube records the flow rate of the liquid. Usually, the flow can be adjusted manually using a built-in valve. 

Types of Variable Area Flow Meters 

Variable area flow meters can be categorized by the type of tube they use, which relates to their ability to withstands various pressures, temperatures, process media, and cost. Process connection size and wetted part materials vary as a function the rotameter type and construction. 

Glass Tube Variable Area Flow Meter - The basic glass variable area flow meter consists of borosilicate glass tube while the float is made of either glass, plastic, or stainless steel. The most common combination is a glass tube and metal float. This is suitable for a measure the flow rate of liquid of low to medium temperatures and pressures. 

Applications: Analytical instrumentation; Industrial processes; Chemical production; Pharmaceutical production; Oil & gas extraction; Refining processes; Fuel cell research; Water treatment systems.

Metal Tube Variable Area Flow Meter - Metal tube variable area flow meters are another type that is suitable for temperatures and pressures beyond the physical and mechanical limits of glass tube versions. They are generally manufactured of stainless steel, aluminum, or brass. The piston position is determined by the mechanical and magnetic followers that can be read from the outside of the tube. They are suitable in situations where applications conditions would damage the glass metering tubes, such as steam applications.

Applications: Purge liquid or gas metering; Liquid, gas, or oil flow measurement; Chemical injection; Rotating equipment flow measurement; High-pressure flow meters for offshore oil platforms.

For more information on rotameters, visit this Arjay Automation web page or contact them by calling (800) 761-1749.