Peaksimple GC-FID upsidedown chromatogram

[Jackkelly]

My peaks are in the negative mV. I know the chromatogram is upside down completely because all the peaks are negative. I think its the peaksimple software. Please share any info you got on this.. Thanks for the assistance.

Jack

[dblux_]

I don't know your specific hardware configuration, but you may check whether your detector allows to change the polarization of the output signal.

[tkubowicz]

Hello

If you have cable from GC (signal output) to your PC (or signal converter) try to swap wires to change polarity - check manual for configuration.

Regards

Tomasz Kubowicz

[Jackkelly]

Resolved:

The polarity was swticed as suggested. I just switched the two wires on the data system. Thanks for the assistance.