high noise level

[nina]

Hi
we use GC/FID shimadzu 14 A.
recently, we moved the instrument, now observing banormally high noise level.
I clean the injector, FID cell, collector,... but this problem dosent solve!
there are noise while the FID dont ignite.
can any one help me!!!!
thanks

[nina]

solve my problem.
the earth dosnt connect.
thanks

[Rafael Chust]

You mean yiou have noise even with the detector's flame off?

If so, your problem is in the electrical installation. Ask an electricitian to check for electrical / electronical noise, if the earth is really 0 V and you do not have fluctuations in power supply.