Rosemount 8800 Multivariable
And here we go again! Let’s dig into a relevant product for flow measurement on the market. We’re focusing on steam applications because vortex flow meters can close a lot of gaps and solve certain problems differential flow transmitters have. Also, steam is an important part of an energy management system, and you can read more about that in this article.
So let’s have a round of applause for the Rosemount 8800 Multivariable from Emerson Automation Solutions! Rosemount products have a lot of presence on the market in flow applications. Here we’ll find out how well the 8800 maintains that reputation.
As usual, take a seat, have a read, and draw your conclusions!
Whatcha got there?
I mentioned in a previous post that the 8800 looks like a Tyrannosaurus rex to me, but I like that about it. My designer prepared the picture below, so tell me what you think!
Jokes aside, the Rosemount 8800 multivariable brings high accuracy and robust design for applications like liquid, gas, and steam. It also includes the option of a temperature sensor, which can save money on buying and installing a separate device.
The display is simple, but the 8800 doesn’t allow local configuration through the display. That means you have to use a field communicator to do the setup, which kinda sucks. On the other hand, you can connect with the 8800 using HART, FOUNDATION Fieldbus, 4-20 mA, or pulse output. I wish it had the option of PROFIBUS PA to bring it up to par with its competitors, but oh well.
You can count chemical compatibility as a plus here, because it offers material options like stainless steel, nickel alloy, carbon steel, and more.
What can it do?
It can measure your steam, gas, or liquid flow, of course! It also has an accuracy of around two percent of mass flow in steam and one percent of volumetric rate for gas and steam. However, it has greater accuracy in liquids, less than one percent for mass and volumetric rate.
Sadly, if you need pressure measurement in your application, the 8800 falls a little short. You need to combine it with a pressure transmitter and a flow computer. As another drawback, the flow computer only supports analog. Basically, you need to convert from HART to two analog signals to send flow, temperature from 8800, and pressure data to the computer for the correct calculations or buy 3 different transmitters. Blah.
The 8800 allows you to exchange the sensor in the process if necessary. You can even remotely switch sensors without stopping your process. Of course, I have to wonder why such a robust device needs to change the sensor. Hmmmm.
Why should I care?
The Rosemount 8800 has a large corner in the market for flow applications. You have good options here, like the SMART fluid diagnostic, which detects changes in the product such as gas to liquid. As a loop-powered meter it’s easy to install and repair. It also brings adaptive signal processing, which gives the Rosemount 8800 vibration immunity and flow range optimization.
Last but not least, it provides solutions like device diagnostics and meter verification. You can do a flow simulation to make sure the electronics work properly, and you can verify the sensor health with a signal from the device.