So I got this gauge (2000+ new) for like $200 on eBay and I've been having some issues with it. I attached it directly to the output of my diff pump and pulled a vacuum through it with my backing pump, and got like 15 torr. The pump was very loud, so I assumed it was my shoddy job of re-using a conflat gasket. I replaced the gasket, and when I pulled vacuum again the pump was whisper-quiet after I closed the ballast. However, the gauge still read 15 torr. This may be an internal issue with my gauge, but I was wondering if this auditory indicator is a valid way of determining vacuum quality.
Thanks,
-Duncan
Debugging an Inficon PKR 251 Series Gauge
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Debugging an Inficon PKR 251 Series Gauge
Some say the glass is half full. Others see it as half empty. I say it is twice as big as it needs to be.
Re: Debugging an Inficon PKR 251 Series Gauge
Rotary vane pumps definitely get quiet when the pressure and gas load are small, but it's not terribly sensitive.
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Re: Debugging an Inficon PKR 251 Series Gauge
Could be a problem with the pirani element, they are known to go bad on these gauges.
Andrew Seltzman
www.rtftechnologies.org
www.rtftechnologies.org
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Re: Debugging an Inficon PKR 251 Series Gauge
Send it back and get your money back, I usually dont spend more than $100 on these units.