Monday, March 21, 2016

Yokogawa YHC5150X Fieldmate Handheld Communicator

The Yokogawa FieldMate family effectively supports the initial setup, daily maintenance, and troubleshooting for the maximum utilization of intelligent field instruments. FieldMate is a flag ship product of the FieldMate family which is a PC based full functional and full field protocol configuration tool. 

The YHC5150X FieldMate Handheld Communicator is the latest HART® Communicator from Yokogawa. All HART® field devices can be configured, polled, and trimmed utilizing a Windows Embedded CE™ based system for faster processing and greater storage capacity. All options are standard and no subscription is required. The YHC5150X is a full function, DD Direct, HART® Communicator supporting universal, common practice, and device specific commands for commissioning, configuration, and maintenance operations.
  • Reads manufacturers' DDs in their native format without the need for translations 
  • HART®-compliant modem communicates with any registered or unregistered HART® Device 
  • Features an ergonomic, handheld design 
  • Enhanced 4.3" diagonal anti-glare touchscreen with color graphic display (no stylus required) 
  • Full QWERTY keyboard for commissioning new transmitters 
  • On-Demand Help Menus and teachable device-specific short cuts 
  • More than twice the battery capacity of any handheld communicator 
  • Manage device information through PC connection 
  • Integrated multi-language support

Sunday, March 20, 2016

Understanding Industrial Flame Arrestors

Flame Arrestor
A flame arrestor operates by removing heat from the flame as it attempts to travel through narrow passages with heat-conductive walls. The arrester will stop a high velocity flame by absorbing heat away from the flame head, which lowers the burning gas/air mixture below its auto-ignition temperature, and creating an atmosphere where the flame cannot be sustained. The channels or passages in the flame arrester are designed to very efficiently conduct heat outward, but still allow the gasses to flow.

The document below, courtesy of ENARDO, provides a nicely detailed explanation of flame arrestor technology as well as where and how they are used.

Finally, its always a wise decision to consult with an experienced applications specialist when choosing, specifying, or applying any type of flame arrestor.

Wednesday, March 9, 2016

Innovative Non-contact Tote Level Monitoring Application

One of the most attractive features of non-contact microwave level measurement is its ability of the radar waves to penetrate through plastic walls. Because of their low dielectric constant, plastic allows measurement without losing the impulse strength of the emitted signals and the detection of the reflected microwave impulses. 

This comes in very handy when measuring level of chemically aggressive fumes and vapors. One approach is to protect the stainless steel horn antenna with a plastic enclosure. Another approach is to measure the stored chemicals from a distance through the wall of the plastic tank or container. 

Recently, a Nivelco non-contact microwave level transmitter was specified for corrosive chemical storage tanks in a local plant. The handling and dispensing of the corrosive chemicals is very challenging, particularly for the instrumentation manufacturers.  In this application, the chemicals were stored in two closed plastic totes.  It was very important to continuously monitor the level of these totes in real time. The local sales engineer recommended using non-contact radar measurement and specified a Nivelco PiloTREK because of its high accuracy and highly reliable level measurement through a plastic tank wall. 

Upon installation a problem developed. The metal cage holding and supporting the tote introduced false signals. Again, the local sales engineer came up with a solution. A Nivelco PiloTREK WEM-150-4 with DN 50 stainless steel horn antenna was specified and careful attention was paid the the placement of the horn antenna. After some trial and error, the horn was placed about 3 feet above the tote, and focussed on an area between metallic bars.

Along with the Eview2 configuration software, setup was quick and easy. During the tests the Nivelco microwave transmitter did extraordinarily well, reaching accuracies of 0.12 inch. Additionally, a mock test simulating a rapid decrease in level was run, and the transmitter managed the situation perfectly. 

In the end the customer was very satisfied with the test results and the use of the Nivelco’s device and greatly appreciated having the experience and knowledge of his local technical sales representative.

Tuesday, March 1, 2016

When a Magnetic Flow Meter is the Right Selection for Your Project

Yokogawa Magmeter
Magnetic Flowmeter
(courtesy of Yokogawa)
Flow measurement is a ubiquitous function in the industrial process control field. Anywhere there are pipes, somebody wants to know what, and how much, is passing through them. Fortunately for us engineers, there is a wide array of industrial flow meters capable of measuring some physical characteristic of fluid moving within a pipe that can be translated into a useful measurement of flow rate.

In industry, there are a number of different technologies used to measure a physical property related to fluid motion, referred to as magnetic, ultrasonic, vortex, Coriolis, differential pressure, and several others. Each methodology exists in the market because it may perform better or cost less when meeting certain performance requirements. This article is focused on magnetic flowmeters and when they may be a good candidate for your project.

Here is a list of some of the positive attributes of magnetic flowmeters.
  • Magnetic flowmeters have no moving parts, always a plus. 
  • General construction arrangement allows for use of an interior liner for corrosion resistance. 
  • With no sensor insertions into the fluid flow, the impact of the instrument on the flow is minimized. 
  • Accuracy, when compared to other technologies, is high. 
  • Application to laminar, turbulent, and transitional flow profiles is permissible. 
  • General insensitivity to fluid viscosity, specific gravity, temperature and pressure. 
  • Magnetic flowmeter technology can be applied to a very wide range of pipe sizes. 
  • Device responds rapidly to changes in fluid flow. 
  • Can be successfully applied to liquids containing heavy particulates. 
  • Generally long service life with little maintenance. 
There are, though, some points about magnetic flowmeters which may make them unsuitable for your application.
  • Magnetic flowmeters only work on liquids with conductivity above a certain threshold. They may be unsuitable for use with hydrocarbons and high purity water for this reason. 
  • Cannot be used to measure gas flow. 
  • Pipe must be grounded. 
  • Typically, the pipe cross section must be filled by the fluid being measured. 
This listing of positives and negatives is intended to be very general in nature. Some manufacturers may have product application solutions that overcome some of the negatives, while others may not be able to deliver all of the positives.

Your Best Course of Action:

Use this general overview to start shaping you understanding of where magnetic flowmeters may be a good option, and contact a product application specialist to discuss what you want to accomplish. Combining your process knowledge with their product knowledge should move you toward a good solution.