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Even the calibration gas can be off spec, too

There are plenty of data loggers on the market for trouble shooting, PLC's are mainly used for control, inless the data logging feature is part of it menu choices. Drop-in programming would need to be documented and confirmed as not interfering with the control algorithms oftem used for safe...

You can expect a reduction in HHV with reduction of you ethane component

evolves from a process or a piece of machinery that you need to control or monitor. It began with water mills, clocks, steam engines, and countless others

what is the controller model number and its input details.

Check the vendors https://sps-support.honeywell.com/s/article/Ex-certification-for-explosive-atmospheres-Ex-ia-Ex-d-and-Zone-Area-Classification-explained

Unfortunately, it is not an issue that AI can solve in thin air, so specifc details are required

Start with a system diagram

1. How to protect for example intrinsically-safe earth system from protective (safety) earth currents when these two earthing systems are connected together? What's the reference standard and section for the solution provided? 2. If in some other companies, earth bonding is not allowed, what is...

All grounds are connected through their separate grounding connections (field and control system). Instrument systems use a common ground point but in the field are isolated from local grounding to avoid ground loop currents. It is not uncommon to find signifficant potetials between separate...

Sounds like replacement is warranted, good luck

Surge conditions are determined by the compressor discharge pressure, and flow conditions. That is part of your process control and safety. Work with your plant drawings, and the compressor supplier.

Your vendor provides flow meter calculations, showing the range of fluid velocities, and expected accuracy levels. you might summarize the data they provided, currently you are experiencing 4-6% fluctuations, relative to normal flow.

These queries seem to be addressing, remote access to commercial fuel dispensers. Perhaps you should register with https://tatsuno-corporation.com

That level of question requires electrical drawings. Typically the control circuits are grounded in the control panel separate from grounding in the field.

reduce the controller gain, as ball valves(apart from V-ported balls) are considered strongly nonlinear.

Ship them to a motor shop, for cleaning, lubrication, and various testing

The ship design firm needs to be involved in that descision.

The control circuits are usually grounded separately, from the drive power circuits. If not you'll have problems.

You have to run all control wiring separate from the power feeds. If not, you'll get all sorts of problems.