LALman wrote:
Our 6890 GC-FID is refusing to light and stay lit. After inspecting the jet (clean) and the detector stack (also clean) I cleaned them anyway by sonication in methanol and acetone. After drying and reassembly. I still get the same problem. At this point I decided maybe it might be the electrometer signal. I am using the default lit offset of 2.0 pA.
When I watch the lighting process I hear it light and see a signal (detector control button on front panel) of 0.1 - 0.4. I assume this is supposed to go up to 2.0 or more? So, I'm getting no signal and I get the failure to ignite error.
It seems to me that maybe I have a fault with the electrometer. Can anybody point me at a resource to help me determine the problem?
Do the following steps:
1. Verify that the body of the detector is properly adjusted.
2. Check the column connections to the detector for leaks.
3. Verify that the ignitor that is on the upper part lights up when the ignition order is given, if it is too deep, with a needle you gently bring it out a little.
4. On the gc board, locate the Front detector or back detector depending on where you have your detector and then position the cursor on H2 and press the ON button for about 2 minutes. Then turn on the detector as it turns on normally.