Separate Instrument Earth Pit
Separate Instrument Earth pit not available
By Roy Matson on 26 November, 2015 - 7:25 pm
>What about remote panel (Eg remote PLC panel, vendor skid >panels etc)? There is a shield...
By baskar on 26 November, 2015 - 5:21 am
What about remote panel (Eg remote PLC panel, vendor skid panels etc)? There is a shield earth bar...
By Roy Matson on 10 November, 2015 - 7:39 pm
I'm not sure if anyone has pointed it out but your instrument shields must not be connected to...
By W.L. Mostia on 9 November, 2015 - 8:33 pm
One thing I forgot is that the ISA-90 standards committee on "Recommended Guidelines for...
By W.L. Mostia on 9 November, 2015 - 8:10 pm
A few years back I wrote a paper with a presentation on a primer regarding instrument grounding. ...
Selecting Fuses for Switch Gear Relay
Any one suggest me how to calculate the fuse rating.
By rigomorales on 24 November, 2015 - 8:21 am
if you want a formula, usually a fuse is selected as 1.7 times the nominal current of a circuit. ...
Recommended Low-Cost Modbus RTU Mixed-Signal Remote I/O Module
Seeking recommendations for a simple, low-cost Modbus remote I/O module w/ analog I/O, digital I/O, 2A+ relays
By Roy Matson on 23 November, 2015 - 4:16 pm
> Howdy folks! My company is looking for a simple, low cost > Modbus RTU remote IO module...
Combination of Ex d and Ex m through I.S. barrier
How to repair cable attached to liquid level indicator?
% Impedance of Power Transformer
Elaborate on % impedance of power transformer.
Experion PKS Display Blackout/Inverted Video
After DCS conversion from Foxboro I/A to Honeywell Experion PKS R430, analog values will flash black for one refresh rate periodically.
By MrAnon on 12 November, 2015 - 7:54 pm
Hi, Thanks for the info - we automation people are often stuck with a decision based on cost. At...
By MrAnon on 10 November, 2015 - 10:24 pm
Just out of curiosity, what motivated the switch to Experion instead of upgrading your CP30/40/60...
3051 Capsule Transmitter Out of Range
3051 capillary transmitter out of range problem
By Roy Matson on 16 November, 2015 - 5:46 pm
You say remote seal, Do you only have one? If this is the case, lower the transmitter closer to...
Control Valve Cavitation Problem
By Roy Matson on 16 November, 2015 - 5:23 pm
I suspect the poster is just trying to solve a theoretical problem. we are looking at a valve that...
Yokogawa Centum VP 4.03 in Windows 7 environment
I need to install Centum VP 4.03 on HIS in Windows 7 environment.
Mitsubishi PLC and BACnet
I am looking for a way to allow my Mitsubishi FX2N PLC to link to a BACnet network (and/or LonWorks).
By sensorman on 16 November, 2015 - 5:47 am
The signal levels as well as the protocol as 'special'. Len Shustek has done some good work...
Connecting 2, 3, and 4 Wire Current Loops
Connecting 2, 3, and 4 wire current loops to the same current sinking PLC input card whilst avoiding ground loops.
QA Testing... Beyond Point 2 Point
When point to point fails to pick up wiring issues...
By MrAnon on 10 November, 2015 - 10:40 pm
I've done simple tension testing... give every wire a good yank. Using wire ferrules is also nice...
vibration reading conversion
By SENTHILKUMAR on 8 November, 2015 - 7:30 am
Dear sir, Rotating Equipment like pump & compressors vibration reading in terms of velocity...
Gas Turbine Compressor Efficiency Down
Low efficiency in Gas Turbine (GE PG9171E) Compressor section.
Isentropic Efficiency Calculations
Calculating isentropic efficiency for compressors, not sure about absolute pressure
What does the alarm "diagnostic alarm TCQA servo current #2 disagrees W/Ref" mean?
Can anyone explain what the following alarm means "diagnostic alarm TCQA servo current #2 disagrees W/Ref"?
Type of 2 core wire to use to wire e stops together
By Steve Myres on 4 November, 2015 - 12:53 pm
E-Stops have no unusual cabling needs. Just select based on circuit voltage and overcurrent...
Alternator Stator Windings Insulation
How far does VPI are water resistant?
Gas Turbine GE PG9171E Flow Parameters
Gas turbine PG 9171E design flow parameters are required. Gt inlet air flow, Gt exhaust air flow and air flow from 5 stage (cooling and sealing air).
By otised on 2 November, 2015 - 8:09 pm
Your question is not inappropriate. You did not indicate whether this unit is simple cycle or...
Auto transformer with automatic on load tap changer
Interested in Learning Allen-Badley PLCs?
Looking for feedback from potential/future Allen-Bradley users.
Communication between PLC and Digital relays in Switchgear
Communication between PLC and Digital relays in switchgear
CT Polarity and Reverse Power
Generator CT polarity and effect on the reverse power relay and other functions.