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Student project in coriolis density measurement.
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The frequency of operation of a coriolis flowmeter depends on the density of the fluid it contains....
What is the error if you use a Tx cable with a K thermocouple?
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an alternative (might be of help).
why bother about individual junctions, you have a...
Oops, I stand corrected. In my earlier post, I was thinking ordinary copper wire was the...
By Rob on 30 January, 2013 - 5:15 pm -
> $$$
> I understand and agree but it would be easier to make a business case if I had...
Exactly. As another poster suggested, either change the extension wire or the thermocouple so they...
The best way to make an estimate of the error is to set up a test system - stick a Type K in a bath...
Type T will have one leg of copper - which is copper-coloured ......
By Curt Wuollet on 30 January, 2013 - 1:46 pm -
Yes, and you can even measure the temperature and calculate the
individual errors. My reasoning...
By Curt Wuollet on 30 January, 2013 - 1:37 pm -
Tell you customer it's the worst kind of error, unpredictable and variable.
regards
cww...
By Curt Wuollet on 30 January, 2013 - 1:35 pm -
With a mismatch you will never get much more than indicator accuracy.
There are simply too many...
Here's my rationale on the topic:
I don't think the error is a linearity question related to...
By Benjamin Pazolli on 29 January, 2013 - 10:23 pm -
> Why not just fix the problem? Either use the right thermocouple or change the cable....
I'm going to suggest the original poster is misreading the information printed on the cable jacket....
By Rob on 29 January, 2013 - 3:04 pm -
Why not just fix the problem? Either use the right thermocouple or change the cable. Thermocouples...
Temperature sensor for underground tank!
CV importance and fine tuning
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randy,
This is something many people have a very difficult time understanding. They assume that...
Most gas turbines use some kind of speed control, during start-up/acceleration or during loaded...
By Randy on 29 January, 2013 - 1:15 pm -
any gas turbine, I want to know how fuel demand is matching with required fuel flow, can be oil or...
The concept of Cv has been covered many times before on control.com. I believe you can also find...
Upgrade Speedtronic Mark II to Mark VI
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GT,
The next time your machine is open and the rotor has been removed, have a look at how the...
By GT on 29 January, 2013 - 9:52 pm -
Dear Mr. CSA!
First, I am sorry. After CI, the temp. higher is the same side before CI.
...
GT,
First of all, during a CI, nothing that affects the wheelspace cooling (or heating) is...
By GT on 20 January, 2013 - 8:25 pm -
Yes, Mr CSA. The wheelspace T/Cs removed during the CI, and then re-installed after the CI prior to...
Were the wheelspace T/Cs removed during the CI, and then re-installed after the CI prior to the...
By Cong on 17 January, 2013 - 2:55 am -
Our GE GT after CI also have the same problem:
Tem. at 2nd stage wheel space are A & B (our...
Range of Pressure Transmitters
What is the Thermowell immersion length required for best accuracy?
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By Ulf on 30 January, 2013 - 6:56 am -
Here is new online tool to calculate your thermowell according to ASME
...
By Mitch Johnson on 15 January, 2013 - 4:57 am -
> Does this 1/3 include the nozzle,
No.
> I try to standardize on just a few different...
Looking for a solution to monitor water tanks with wireless connectivity.
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By Pietro Tallarico on 29 January, 2013 - 2:20 pm -
You may install the transmitter differential profibus pa (if the tanks are to the atmosphere.) All...
from the Instrumentation & Control department...
Altom Gas Turbine Off skid gas fuel vent valve failed open faultAlstom typhoon Gas Turbine Tripped on "Off skid gas fuel vent valve failed open" fault.After 15 minutes of tripping, the fault was gone and turbine was on ready to run prompt. This happened thrice in 6 months.
should ATEX transmitter covers be screwed on hand tight or by force?
from the Aggresive Liquids Level Automation ehh?? department...
Selection of a Level Gauge for Aggresive HydrocarbonSelection of LG for glass attacking Hydrocarbon...
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Hi
You could check out this stainless steel level indicator:...
Smart device come with a feature to set a damping value to the process variable measurement.
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By Rob on 25 January, 2013 - 3:49 am -
Curt has given you a pretty good example of where a long filter time is essential to get a stable...
Looking for information before buying pressure & temperature transmitters
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By Bob Peterson on 24 January, 2013 - 9:29 am -
[What are the important points needs to be checked while buying Pressure
and temperature...
Does air in water actually result in inaccurate metering?
Looking for a cheap device that can re-transmit a single 4-20mA signal to two 4-20mA signals. Something like a repeater device that can split the 4-20mA signal into 2 streams without signal degradation.
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By Roy Matson on 16 January, 2013 - 6:58 pm -
Any signal isolator will do that for you.
If both your devices are referenced to ground it's not...
By Curt Wuollet on 16 January, 2013 - 1:25 pm -
Simply putting them in series may work, provided the source has enough
compliance and they are...
By Steve Myres on 16 January, 2013 - 10:49 am -
It will depend on where isolation is needed and present, and the drive capability of the...
By g mcewan on 16 January, 2013 - 9:55 am -
try www.westermo.com or www.moxa.com or search westermo MD11 they do several devices/repeaters with...
By sanjeeb on 16 January, 2013 - 7:04 am -
From my instrument I have one two wire 4-20mA O/P. I need to provide this signal to two different...
Fluctuating flame intensity on primary combustion chamber flame detectors
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Gents,
An update and further question.
OEM has proposed new flame thresholds based on current...
from the Project managment department...
Facing problem in float less level switch of steam drum levelWe have problem in float less safety switch of steam drum in our boiler.
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By israr Ahmad on 16 January, 2013 - 5:01 am -
Dear ,
I haven't tried increasing sensitivity because i haven't variable sensing controller in...
Square root extraction in DCS
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By JRS on 15 January, 2013 - 12:00 pm -
> Do as Almonster suggests and put some DP on your transmitter e.g. 50%, that
> will show...
By JRS on 15 January, 2013 - 11:17 am -
You only do the square root ONCE; EITHER at the transmitter OR at the DCS.
If you are dealing...
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It seems like the less a statesman amounts to, the more he loves the
flag.
