Recent content by Retep

Hi Again, Thinking this through - your pump probably has 30-40' of static head - i.e.; pump set depth at 150', at maximum aquifer draw down there is still 30' of water above the pump. This means you will have 20' head up your sleeve, which must be enough to feed the WTP. Assuming the pump...

Hi srichardson_ProA, What is the fluid - you mentioned water and "blowdown" - is this boiler condensate? If so - please check conductivity limits for your ONICON ft-3000 electromagnetic flow meter - boiler blowdown will have very low conductivity. This flowmeter may be slightly less sensitive...

Hi VBV, It is a while since I last configured an Altivar - I do recall they have a pretty useful front display. When the VFD is running - what is the output frequency? Is it 30Hz or 60Hz? Is the current consistently above 50 Amps? Internet curve for 5CHC006 model 05CHC01564CTB says 7L/s or...

Hi Giopeco, I have investigated options quite extensively for a previous job without success. Sulphuric acid will generally accumulate on the sulphur surface interface. Our field operators would take a 12hourly manual sample in a foil cup from the sulphur melting pit surface, let it cool, top up...

Hi brinda75, In my experience the target of 3.5MW will have been set based on a series of factors - not just the generation; * Allowable frequency drop on a load shed, i.e.; final grid frequency can you tolerate 49.5Hz? 49.0Hz? (We are 50Hz) * Actual speed of frequency decay - this is a...

Hi Sandip, As per jschulze post - check all the basics, etc. Not all modbus clients are created equal. Depending on your modbus master you may be able to preconfigure delays between transmissions. I have found a couple of modbus clients that will not communicate consistently unless there is a...

Hi Jashkishore - Yokogawas Centum VP is not client server based. Every operator station communicates directly with the controllers. This has implications with graphics loading - but easily managed. Addition of servers for add-on functions is at end users discretion. Cheers

Hi Oneye, I have found nothing survives voltage surge from a direct lighting strike - and the damage is extensive and unambiguous. The comment in the first post "damaged previously perhaps as a result of Lightning surge" suggests you are unclear - which is why I encourage selecting isolation...

I meant DC to DC converter ... although happy face is good too ...

Hi oneye14, The damage to the instrument & power supply & control panel is caused by excessive current in the instrument loop and/or power supply loop. Unless your cable & end devices are fully isolated a change in potential at one end (caused by a nearby lighting strike or simply a different...

You don't want a surge protector - you need an isolator. There are literally thousands of off the shelf options for electrical or optical isolation. For lightning isolation I recommend optical - via fibre optic if your budget and install allows. If you are trying to avoid damage from shifts in...

Hi Science20, Keeping in mind I know nothing about your chemistry and process - and I understand the wax (scale?) formation is not cooling related - other methods I use (in order of decreasing enthusiasm); Options; 1. Diaphragm seal style DP - i.e.; not purged, direct onto the bridle - DN50 or...

I sounds like you need heat tracing on the bridle. You could also use HP water supply purge flow (i.e.; low flow 10+ L/hr depending) to keep impulse lines and bridle wax free.