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2
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Liquid Fuel Coming from AA2

Posted by k000

on 11 December, 2017 - 4:11 pm

what can be the reason of liquid fuel coming from AA2 drain point (tell tale leakoff) point?

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By khoriwal000

on 22 June, 2018 - 2:11 pm

sir, is there any possibilities of purge air coming out of tell-tail leak off point? (may it be...

10
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Virus Infection via serial Modbus

Posted by Rob Burghard on 2 June, 2018 - 4:35 am

Is it possible for an infected powermeter being the Modbus slave to infect its master via a serial connection?

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By mtoecker

on 22 June, 2018 - 7:26 am

Hi Rob, Your question requires more detail and analysis than you probably thought going into it....

By Rob Burghard on 10 June, 2018 - 1:19 pm

Thank you! The question is a very fundamental but real one: Can an infected Modbus slave infect...

By Fred Loveless on 6 June, 2018 - 10:57 am

It is possible but highly improbably that a virus could be passed up to the PC from the slave. The...

By demigrog2

on 4 June, 2018 - 1:38 pm

Is this a hypothetical question? If you've got an infected powermeter I'd love to know more...

By Rob Burghard on 2 June, 2018 - 12:26 pm

Thank you. Perhaps my question wasn't clear. Let's say this powermeter has an infected OS. Can the...

By koen_verschueren

on 2 June, 2018 - 9:40 am

With all bus connections there is always a possibility one device infects an other, but in this...

7
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Level Measurement for Liquefied Hydrogen

Posted by Biky

on 4 June, 2018 - 3:36 am

Level measurement for liquefied hydrogen storage tank

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By Biky

on 21 June, 2018 - 9:45 pm

Thank you everyone for your valuable information. ...

By RoyMatson

on 14 June, 2018 - 8:05 pm

As I suspected they use a regular DP LI(T)page 10 The vertical line from the bottom of the tank...

By d on 13 June, 2018 - 3:54 pm

link intended for earlier posting: ...

By d on 13 June, 2018 - 10:40 am

For large ground based storage (low pressure), double walled, vacuum insulated storage tanks, just...

By biky on 12 June, 2018 - 1:15 am

Thank you David & RoyMatson for your kind informations. As per your suggestions, I also want...

By RoyMatson

on 7 June, 2018 - 6:30 pm

If I remember correctly it's just a regular DP cell at the bottom of the tank, not a direct mount...

By David_2

on 6 June, 2018 - 11:43 am

Bela Liptak's Instrument Engineering Handbook, Process Measurement and Analysis, Vol 1, has a...

2
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Control System Retrofit

Posted by Anna Kendrik

on 6 May, 2018 - 7:33 am

Retrofitting/upgrading MARK IV control system with Siemens to gain MARK VIe benefits

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By SaraAsghariii

on 18 June, 2018 - 1:50 am

thank you so much for your explanation, would you please give me your contact email for more...

By CSA

on 7 May, 2018 - 10:39 am

Anna Kendrick (or SaraAsghariii), This is a very interesting post: Replacing a Mark IV turbine...

Solo Controllers By Automation Direct?

Posted by ShockingEffects

on 15 June, 2018 - 9:04 am

Looking for honest reviews of SOLO temperature controllers by Automation Direct.

2
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Single transmitter for two ESD outputs

Posted by Kara01 on 12 June, 2018 - 6:03 am

Single transmitter for ESD on HH and LL

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By dwpatterson

on 13 June, 2018 - 3:24 am

If the process impacts, the safety impacts, equipment damage and the production loss impacts from a...

24
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Non-Nuclear Density Meter For Slurry

Posted by Austin Bell on 24 April, 2012 - 2:27 pm

Does anybody know of a non-nuclear continuous in- line density meter for slurry?

New Replies:

By Frank

on 12 June, 2018 - 10:29 am

Yes, there are a lot of good experiences with the SDM Slurry Density Meter. They have a lot of...

2
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Sending Flow Meter Information to RTU

Posted by Liu jin on 11 February, 2018 - 12:11 pm

Sending the flow meter information to RTU with keeping the 4-20 ma to base monitor.

New Replies:

By scadametrics

on 7 June, 2018 - 7:03 pm

If I understand your question correctly, I think you want to take a 4-20mA flow signal, and then...

29
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High leg on 3 phase power

Posted by mkiger on 1 August, 2004 - 12:04 pm

I have 3 phase power that has a high leg of 211 volts to ground. The other two legs are 120 volt to ground. Is it fine to run a three phase machine on this voltage?

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By James williams on 7 June, 2018 - 6:48 pm

Well Said. Not to say that we all didnt have to learn from someone but this stuff is not a good...

Ingersoll Rand Inlet Valve Problems

Posted by mike on 6 June, 2018 - 9:34 am

Getting a "inlet valve rotated" error code on a 1990 SSr-Ep-75

3
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Loadcell Strange Behavior after Calibration

Posted by TylerDurden

on 21 May, 2018 - 2:26 am

The loadcell keeps showing decreasing values in the output. The calibration of the loadcell has been done with very small weight compared to tank capacity.

New Replies:

By TylerDurden

on 2 June, 2018 - 10:38 am

Dear All, Thanks a lot for your feedback. It has been clarified that the decrease in the...

By FATIH TURAN on 30 May, 2018 - 12:27 pm

You would have to apply minimum 10% of the maximum weight to test the calibration. In your case it...

By dave on 21 May, 2018 - 7:44 am

Sounds like drift in your transmitter/converter electronics. 1. device age (in service) as it...

2
replies

Cybersecurity in the I&CS World

Posted by KenCrater

on 29 May, 2018 - 1:02 pm

Automation World article details risks and countermeasures relating to securing networked automation systems.

New Replies:

By joeweiss

on 1 June, 2018 - 1:20 pm

Process sensors, actuators, drives and their lower level networks do not have cyber security or...

3
replies

Sample Modbus Code with 8051

Posted by imready

on 31 May, 2018 - 11:31 am

Looking for some example Modbus RTU code for 8051 controller

New Replies:

By John Catch - InFLOW, INC. on 1 June, 2018 - 9:53 am

You might try contacting Micromint, LLC (www.micromint.com). They specialize in 8052 chips and have...

By imready

on 1 June, 2018 - 7:23 am

Hey thanks for reply, Actually i have wind speed wind direction sensor in which siliconlab...

By rogerval

on 31 May, 2018 - 4:01 pm

Hi, There are doubtless many other people on this forum who are willing to help, but a little...

2
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How to Configure a Combined Guided Wave Radar Transmitter

Posted by Amar DAMENE on 20 May, 2018 - 1:55 am

How to setup the LRV and URV for a combining guided wave Radar with Rosemount Chamber

New Replies:

By a062549 on 30 May, 2018 - 2:11 pm

I believe the total length is what your after, not the distance to each connection point?...

By oneye14

on 24 May, 2018 - 4:13 pm

Not that familiar with these transmitters - perhaps a Technical Note may help: ...

36
replies

Wrong Thermocouple Extention Cable

Posted by Benjamin Pazolli on 29 January, 2013 - 12:24 am

What is the error if you use a Tx cable with a K thermocouple?

New Replies:

By David_2

on 29 May, 2018 - 3:44 pm

A friend inherited his Dad's process instrument field calibration business and his Dad's notebook. ...

By dave on 29 May, 2018 - 6:45 am

And a bucket of ice for the cold junction for pre-startup steam turbine testing >I'm old and...

By RoyMatson

on 28 May, 2018 - 6:34 pm

I'm old and grumpy enough to remember calibrating thermocouple devices before the days of digital...

By E&I Tech on 21 May, 2018 - 6:00 pm

>I cannot believe we are discussing the relative merits of >doing something in various wrong...

2
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Coriolis Meter Vibrations

Posted by chillwins

on 25 May, 2018 - 5:28 am

Could external pipe vibrations cause errors in Coriolis measurement?

New Replies:

By Fabrício on 29 May, 2018 - 6:21 am

If the Coriolis flowmeter works in high frequency, the pipe vibration will not affect the...

By d on 25 May, 2018 - 10:24 pm

Interference by mechanical vibrations not likely, but you do have to consider the flow pulsations....

3
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3-Point Step Control

Posted by trunkbitz

on 3 May, 2018 - 3:56 pm

Can someone elaborate 3-point step control on Auto and Manual mode in general?

New Replies:

By oneye14

on 24 May, 2018 - 4:07 pm

These can explain better than I - Siemens of course is overcomplicated as expected..... ...

By trunkbitz

on 22 May, 2018 - 7:26 am

I thank you a lot, sir. I have been waiting for a reply for so long as it was urgent at the time. ...

By oneye14

on 5 May, 2018 - 4:56 pm

Generally 3 point control is to provide basic step control to a device such as open/close a valve...

4
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Barriers for Pressure Sensors, Temperature Sensors, and Solenoids.

Posted by Shailesh09

on 17 February, 2017 - 2:18 am

Requirement of barriers in control panel (safe area) for instruments (sensors & solenoids) which are in gas group IIA/IIB. (application compressor)

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By David_2

on 17 May, 2018 - 11:48 am

FYI ASCO solenoid valves have I/S models ...

By moeirvin

on 16 May, 2018 - 9:47 pm

You should make sure that you only use barriers and sensors together whose safety-related data and...

3
replies

Anemometer - Modbus or NMEA Behaviour Differences.

Posted by davotnz

on 16 May, 2018 - 12:49 am

Trying to understand the likely difference in behaviour beween modbus and NMEA0183 choice for an ultrasonic anemometer that supports either

New Replies:

By koen_verschueren

on 17 May, 2018 - 8:59 am

Modbus is a master/slave protocol so you have to send a data request and then receive the answer....

By David_2

on 16 May, 2018 - 11:20 pm

I'd never heard of NMEA either. So I Googled it. First .pdf hit is the The NMEA 0183 Protocol. 28...

By RoyMatson

on 16 May, 2018 - 11:54 am

This is the first I've heard of Nmea0813. Why would you use such an obscure system when Modbus...

Difference Between Orifice Flow Meter and Ultrasonic Flow Meter

Posted by hadisiasi

on 7 May, 2018 - 12:59 pm

we have problem in gas consumption according to difference between orifice Flow Meter and Ultrasonic Flow Meter.

7
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Differential Pressure (Flow) Measurement

Posted by PolyT

on 26 April, 2018 - 6:05 am

Flow (based on orifice + differential pressure) calculation in DCS/PLC software

New Replies:

By W.L. Mostia on 4 May, 2018 - 4:20 pm

I believe one of the equations is given below is similar to your equation: Q=Cd Ao...

By Arthur Mayclin on 4 May, 2018 - 8:58 am

If you have the orifice plate design data, and don't want to get wrapped up in the actual...

By PolyT on 2 May, 2018 - 3:46 pm

Thanks again Bill for the valuable info, I have checked the proposed sizing programs, especially...

Calibration of MagMaster Flowmeter

Posted by Danilo Gacevic on 4 May, 2018 - 12:39 pm

How to choose "Snsr Fact 1" to "Snsr Fact 4" parameters in MagMaster "SENSOR CALIBRATION" group?

2
replies

Modbus Control for Digital Dial Gauge Data Logger

Posted by brilliant_idea

on 26 March, 2018 - 12:13 am

Have an 8-channel Modbus data logger for reading 8 digital dial gauges from China and need some assistance with its Modbus communication.

New Replies:

By theindustrialcommander

on 1 May, 2018 - 3:35 pm

Where you able to communicate with it? If you still need some help, let me know. I specialize in...

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