Need Suggestions on a Labview Design Project

[AnalogKid2DigitalMan]

Looking at the project from a safety standpoint:

What range of temperatures and pressures?

What materials are being pressurized?

If the PC or code locks up, what is the worst that could happen?

Manual E-Stops or safe system shutdown protocols?

-AK2DM

[ffl3883]

Temperature range 0-300 F

Pressure Vaccum to 1000 Psi

Objects under heat and pressure are transducers in a furnace

You are totally right. The temperature and pressure receipes run almost 20 hours. If there is a code error, causing system to lock up. The worse result could be - all the units under test will have to be scraped and Chamber and pressure controller unit might be damaged if stuck running for a long time. E Stop will definitely implemented. I am think some algorithm within labview to shut down all the equipments if certain error occor. Any suggestions ? 

Many thanks

[AnalogKid2DigitalMan · Accepted solution]

In the event of PC or program lockup failsafe- look into watchdog timers.

You may also want to implement a temperature monitoring relay- if the relays driving your heating element shorts out and applies full power to the heater 100% of the time, the safety relay can kill power once a preset over-temperature limit is reached.

-AK2DM

[ffl3883]

Good point thank you

[AnalogKid2DigitalMan]

Experience is a good teacher, get burned once, lesson learned!

2000psi of H2 at 375C after the SSR's powering the heaters shorted. Batch of product = Cinnamon Toast Crunch. I then specified that Over-Temp Relays be installed.

-AK2DM