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FID detector temperature fails manual OQ
Posted: Wed Oct 27, 2010 10:21 am
by sakthidasan
Guys,
Can you please help me. I'm not able to pass FID detector temperature accuracy test. My specification says 250C + or - 10C where as I can reach only 235C.
What do i need to do If I want to pass this test?
Thanks
Sakthi
Posted: Wed Oct 27, 2010 6:47 pm
by chromatographer1
have you lost insulation? Do you have the thermometer probe at the proper location? Have you considered re calibrating your temperature settings to compensate for the lower temperatures produced?
If you don't have any mistakes, then adjust your hardware to get the proper temperatures. Just because the dial may read 250, it doesn't mean it means 250, it means what you get.
Rod
Posted: Wed Oct 27, 2010 7:03 pm
by aldehyde
You should have no problem getting higher than 300 C, something is wrong if you can't get past 235.
Manual OQ for FID detector temperature fails
Posted: Wed Oct 27, 2010 7:44 pm
by sakthidasan
have you lost insulation? Do you have the thermometer probe at the proper location? Have you considered re calibrating your temperature settings to compensate for the lower temperatures produced?
If you don't have any mistakes, then adjust your hardware to get the proper temperatures. Just because the dial may read 250, it doesn't mean it means 250, it means what you get.
Rod
hi,
"then adjust your hardware to get the proper temperatures" - how to adjust the hardware? Is there is any manual available? I'm using Agilent GC.
Thanks for your reply.
Posted: Thu Oct 28, 2010 3:30 am
by chromatographer1
If you set the detector temperature by computer, and you set it to 250C but only get 235C by true and actual measurement with a thermometer, at what setting would you set the detector temperature to achieve a true temperature of 250C ? or 235C? or 275C? or 150C ?
Spend a hour or two and determine the actual temperatures achieved at different settings and document it.
Use the document as a calibration of your instrument.
Unless you wish to perform your own service, ie. replace controller boards, or determine why the sensors are shutting off the heater at the wrong temperature.
What else are you going to do, other than buying a new GC ?
If you get 235C when you type in 250C, and you don't want 235C , then don't type in 250C. Type something else instead.
You have to determine the proper setting to get the temperature you want.
Or call in the service department and pay for the work they will do.
Good luck,
Rod